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Arkema France patents


Recent patent applications related to Arkema France. Arkema France is listed as an Agent/Assignee. Note: Arkema France may have other listings under different names/spellings. We're not affiliated with Arkema France, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "A" | Arkema France-related inventors


Curable compositions comprising mono-functional acrylates

Curable compositions include: a) at least one (meth)acrylate monomer or oligomer and b) at least one mono-functional (meth)acrylate monomer comprising a polycyclic moiety having at least three rings that are fused or condensed. The compositions may comprise an initiator system to render the compositions as curable. ... Arkema France

Polymer composition with filler, its method of preparation and use

The present invention relates to a polymeric processing aid its composition and its process of preparation and its use. In particular, the present invention relates to a polymeric processing aid and its use for filled halogen containing thermoplastic polymers. ... Arkema France

Polymer composition, its method of preparation and use

The present invention relates to a polymeric processing aid its composition and its process of preparation and its use. In particular, the present invention it relates to a polymeric processing aid and its use for highly filled halogen containing thermoplastic polymers. ... Arkema France

Article with zeolitic particles bonded with resin

The invention relates to an adsorbent article. The adsorbent article contains zeolitic particles which include at least one zeolitic adsorbent. ... Arkema France

Hydroxylated and/or carboxylated polyester resin with high solids content and high covering power for coating of metal foil

The invention is directed to a polyester resin bearing at least two functions from among hydroxyl and/or carboxyl, based on: a) a polyol component comprising a1) at least one diol bearing at least two lateral c2 to c4 alkyl substituents, a2) at least one diol bearing at least one lateral methyl substituent, a3) at least one c2 to c6 diol bearing no lateral substituent, a4) optionally, at least one polyol with functionality >2 and b) a polyacid component comprising b1) at least one aromatic diacid, b2) at least one linear c4 to c10 aliphatic diacid, b3) optionally, at least one cycloaliphatic diacid, said resin being free of any unsaturated fatty monoacid or monoalcohol. The invention is further directed to the polyester resin in solution in an organic solvent and crosslinkable compositions comprising it, particularly for metal foil coatings (“coils”).. ... Arkema France

Method for impregnating a fibrous substrate with a methacrylic mixture comprising a flame-retardant substance

The present invention relates to a (meth)acrylic mixture for impregnating a fibrous substrate, characterized in that it comprises: a) a first dispersion comprising at least one (meth)acrylic polymer obtained by emulsion polymerization of one or more (meth)acrylic monomers, b) a second dispersion comprising at least one flame retardant. The invention also relates to a method for impregnating a fibrous substrate with a (meth)acrylic mixture of this kind, and to a method for manufacturing mechanical parts or structured elements, or articles, from the (meth)acrylic mixture. ... Arkema France

Compositions of polyamide and peba for the injection of fatigue-resistant rigid parts

Composition including: (a) 50% to 95% of at least one semicrystalline polyamide of formula a/z in which: a is an aliphatic repeating unit chosen from a unit obtained from the polycondensation of at least one amino acid and a unit obtained from the polycondensation of at least one lactam or a unit x.y obtained from the polycondensation of at least one diamine, and of at least one dicarboxylic acid, and z represents another polyamide and is included from 0 to 20%; (b) 5% to 50% of at least one semicrystalline copolyamide comprising amide units (ba1) and including polyether units (ba2), having a glass transition temperature (tg) below 75° c.; (c) 0% to 20% by weight of fibres and/or fillers, (d) 0% to 20% of at least one impact modifier, (e) 0% to 5% of at least one additive, for the manufacture of a sports article.. . ... Arkema France

Masterbatch of carbon-based conductive fillers for liquid formulations, especially in li-on batteries

. . A masterbatch in agglomerated solid form including carbon nanofibers and/or nanotubes and/or carbon black, the content of which is between 15 wt % and 40 wt %, preferably between 20 wt % and 35 wt %, relative to the total weight of the masterbatch; at least one solvent; at least one polymer binder, which represents from 1 wt % to 40 wt %, preferably from 2 wt % to 30 wt % relative to the total weight of the masterbatch. Also, a concentrated masterbatch, characterized in that it is obtained by eliminating all or part of the solvent from the masterbatch described previously. ... Arkema France

Process for obtaining high-period, thick ordered films comprising a block copolymer

The present invention relates to a process for obtaining high-period (typically >10 nm), thick (typically >20 nm) ordered films on a nanometric scale comprising a block copolymer (bcp). The invention also relates to the compositions used to obtain these thick ordered films and to the resulting ordered films that can be used in particular as masks in the lithography field.. ... Arkema France

Compositions based on 2,3,3,4,4,4-hexafluorobut-1-ene

A composition including 2,3,3,4,4,4-hexafluorobut-1-ene as a mixture with one or more hydrocarbon, hydrofluorocarbon, ether, hydrofluoroether or fluoroolefin compounds having a boiling point of less than or equal to 0° c. Also, the use of such a composition in heat transfer applications. ... Arkema France

Tetrafluoropropene-based supercritical heat-transfer fluids

A method for heating a fluid or a body using a vapour compression circuit containing a heat-transfer fluid containing tetrafluoropropene, said method including, successively and cyclically, evaporation of the heat-transfer fluid, compression of the heat-transfer fluid, cooling of the heat-transfer fluid and expansion of the heat-transfer fluid, the heat-transfer fluid being in the supercritical state at the end of compression. Also, an installation suited to implementing this method.. ... Arkema France

Fluid composition for stimulation in the field of oil or gas production

The present invention relates to filamentous polymer particles useful in oil, condensate or gas recovery from subterranean locations as hydraulic fracturing fluids, diverting fluids, fluids that make it possible to improve the distribution and the flow profiles of the fluids or products injected (referred to as conformance fluids) or permeability control fluids, sand control gravel pack placement fluids, acid fracturing fluids, and the like. These fluids are stimulation fluids injected in wells which serve also as producing wells for the hydrocarbons initially present in the subterranean formations.. ... Arkema France

Method for the thermal treatment of poly-arylene ether ketone ketone powders suitable for laser sintering

The invention relates to a process for the heat treatment of poly(arylene ether ketone ketone) powder suitable for laser sintering, and also to the powders resulting from this process.. . ... Arkema France

Method for producing a master mixture based on carbonaceous nanofillers and super plasticiser, and the use thereof in hardenable inorganic systems

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. ... Arkema France

05/31/18 / #20180148395

Stabilization of 1-chloro-3,3,3-trifluoropropene

The use of a c3 to c6 alkene compound including a sole double bond, for limiting or preventing the isomerization of trans-1-chloro-3,3,3-trifluoropropene to cis-1-chloro-3,3,3-trifluoropropene. Also, a composition including 1-chloro-3,3,3-trifluoropropene and a c3 to c6 alkene compound including a sole double bond, and also to various uses of this composition, such as a process for heating or cooling a fluid.. ... Arkema France

05/31/18 / #20180148394

Compositions based on 1,1,3,3-tetrachloropropene

The present invention relates to compositions based on f-1230za (1,1,3,3-tetrachloropropene), or on a mixture consisting of f-1230za and f-1230zd (1,3,3,3-tetrachloropropene), the manufacture thereof, and also the use thereof in particular for the production of f-1233zde (trans-1-chloro-3,3,3-trifluoropropene), f-1234zee (trans-1,3,3,3-tetrafluoropropene), and/or f-245fa (1,1,1,3,3-pentafluoropropane).. . ... Arkema France

05/24/18 / #20180141885

Method for producing fluorinated compounds

The invention relates to a method for producing a fluorinated compound, comprising: the provision of a gaseous flow comprising hydrofluoric acid; the provision of at least one liquid flow of a chlorinated compound and the vapourisation thereof by mixing with said gaseous flow, the resulting mixture being a gaseous mixture; and the catalytic reaction of the chlorinated compound with hydrofluoric acid in a gaseous phase and the collection of a product flow. The invention also relates to a facility for carrying out said method.. ... Arkema France

05/17/18 / #20180134936

Binary refrigerating fluid

Binary compositions of 2,3,3,3-tetrafluoropropene and difluoromethane, and especially to the uses thereof as a heat transfer fluid in compression systems with exchangers operating in counterflow mode or in split flow mode with counterflow tendency. Also, a method of heat transfer in which a binary composition of 2,3,3,3-tetrafluoropropene and difluoromethane is used as refrigerant in compression systems with exchangers in countercurrent mode or in crossed-current mode with countercurrent tendency.. ... Arkema France

05/17/18 / #20180134928

Adhesive composition based on ethylene copolymers obtained by tube copolymerisation, that can be used for extrusion-coating and extrusion-lamination

An adhesive composition of at least one ethylene polymer or copolymer, wherein at least one first polymer or copolymer including the unsaturated carboxylic acid ester type comonomer is copolymerized in a continuous high-pressure tubular reactor, while a second polymer or copolymer including the functional comonomer is copolymerized by either autoclave or tubular continuous high-pressure radical means; the first and second polymer or copolymer possibly being of one and the same polymer/copolymer. Also, a multilayer structure that incorporates the adhesive composition and a particular process for obtaining this composition.. ... Arkema France

05/17/18 / #20180134891

Composition of poly-arylene ether ketone ketone powders suitable for laser sintering

The present invention relates to a composition comprising at least one poly(arylene ether ketone) powder suitable for laser sintering and also to the process which makes it possible to obtain it, minimizing the amount by weight of remaining non-sintered powder after production of the part by sintering.. . ... Arkema France

05/17/18 / #20180134886

Fluorinated polymer composition

The present invention concerns a fluorinated polymer composition, methods for producing same, and products that can be produced from said composition. More particularly, the invention concerns a thermoplastic polymer composition comprising the following components a, b and c: a- a polyvinylidene fluoride (pvdf) homopolymer comprising a fraction of ultra high molecular weight chains (uhmcf); b- a vinylidene fluoride (vdf) elastomeric copolymer and at least one other fluorinated comonomer copolymerisable with vdf, and c- a vdf homopolymer having a lower viscosity than component a.. ... Arkema France

05/10/18 / #20180127340

Process for the purification of pentafluoroethane

The invention relates to a process for the purification of pentafluoroethane (r125) containing chloropentafluoroethane (r115). The mixture to be purified is subjected to an extractive distillation, the extractant being selected from dimethylformamide (dmf), dioxane, dimethylsulphoxide (dmso) and diethylsulphoxide (deso).. ... Arkema France

05/10/18 / #20180126348

Composition comprising hf and 3,3,3-trifluoro-2-chloropropene

An azeotropic or quasi-azeotropic composition including hydrogen fluoride, 3,3,3-trifluoro-2-chloropropene and one or more (hydro)halogen-carbon compounds including between 1 and 3 carbon atoms. Also an azeotropic or quasi-azeotropic composition including hydrogen fluoride, 3,3,3-trifluoro-2-chloropropene, and one or more compounds selected from among 1,3,3,3-tetrafluoropropene, 1,1,1,2,2-pentafluoropropane, 2,3,3,3-tetrafluoropropene, 3,3,3-trifluoropropene, e-3,3,3-trifluoro-1-chloropropene, trifluoropropyne, 1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3-pentafluoropropene, 1,1,1,2,3-pentafluoropropene and 2-chloro,1,1,1,2-1 tetrafluoropropane.. ... Arkema France

04/05/18 / #20180093934

E-1-chloro-3,3,3-trifluoropropene production process from 1,1,3,3-tetrachloropropene

. . A production process for the production of e-1-chloro-3,3,3-trifluoropropene, the process including at least one stage during which 1,3,3,3-tetrachloropropene reacts with anhydrous hydrofluoric acid in the liquid phase, in the absence of a catalyst, with an hf/1,1,3,3- tetrachloropropene molar ratio between 3 and 20 inclusive, at a temperature between 50° c. And 150° c. ... Arkema France

04/05/18 / #20180093305

Use of alkane sulfonic acid for cleaning in the sugar industries

The present invention concerns the use of at least one alkane sulfonic acid of formula r—so3h, in which r represents a linear or branched saturated hydrocarbon chain comprising 1 to 4 carbon atoms, for cleaning solid deposits containing at least one aconitic acid salt. The invention also concerns a method for cleaning solid deposits containing at least one aconitic acid salt, using at least one alkane sulfonic acid.. ... Arkema France

03/29/18 / #20180086173

Vehicle heating and/or air conditioning method

A method for the heating and/or air conditioning of the passenger compartment of an automobile using a reversible cooling loop in which flows a coolant containing 2,3,3,3-tetrafluoropropene. The method is particularly useful when outdoor temperature is lower than −15° c. ... Arkema France

03/22/18 / #20180079943

Heat-transfer fluid for a centrifugal compressor

. . . . A process for cooling or heating a fluid or a body by means of a vapour compression circuit including a centrifugal compressor and containing a heat-transfer fluid, the heat-transfer fluid including at least two compounds selected from 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoropropene, 1,1-difluoroethane and 3,3,3-trifluoropropene, in which: the ratio of the mach number of the centrifugal compressor to the mach number which the centrifugal compressor has under the same operating conditions if the heat-transfer fluid is replaced with 1,1,1,2-tetrafluoroethane in the vapour compression circuit is greater than or equal to 0.97 and less than or equal to 1.03; the compression ratio of the centrifugal compressor is less than or equal to the compression ratio which the centrifugal compressor has under the same operating conditions if the heat-transfer fluid is replaced with 1,1,12-tetrafluorethane in the vapour compression circuit.. . ... Arkema France

03/22/18 / #20180079706

Improved process for producing (meth)acrylic acid

The invention is directed to a process for recovering/purifying (meth)acrylic acid which does not use azeotropic solvent and is based on the use of two columns for purifying a reaction mixture comprising (meth)acrylic acid. The process according to the invention includes a dry vacuum pump condensation system, which makes it possible to reduce the amount of final aqueous discharges.. ... Arkema France

03/15/18 / #20180076444

Electrodes of li-ion batteries with improved conductivity

The invention relates to the field of storing electrical energy in secondary lithium batteries of the li-ion type. More precisely, the invention relates to an electrode material for a li-ion battery, to the method for the production thereof, and to the use of same in a li-ion battery. ... Arkema France

03/01/18 / #20180057748

Thermoplastic composition and prepreg, composite material made of said prepreg, and uses of said composite material

. . The present invention relates to the field of thermoplastic composite materials. Specifically, the invention relates to a fluorinated, flame-retardant thermoplastic composition, to the prepreg prepared from said composition, to the composite material containing said prepreg, to the methods enabling manufacture, and to the uses of said material. ... Arkema France

03/01/18 / #20180057432

Process for the preparation of fluoroolefin compounds

The subject of the invention is a process for the preparation of fluoroolefin compounds. It relates more particularly to a process for manufacturing a (hydro)fluoroolefin compound comprising (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at least one hydrogen atom, provided that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, into contact with potassium hydroxide in a stirred reactor, containing an aqueous reaction medium, equipped with at least one inlet for the reactants and with at least one outlet, in order to give the (hydro)fluoroolefin compound, which is separated from the reaction medium in gaseous form, and potassium fluoride, (ii) bringing the potassium fluoride formed in (i) into contact, in an aqueous medium, with calcium hydroxide in order to give potassium hydroxide and to precipitate calcium fluoride, (iii) separation of the calcium fluoride precipitated in step (ii) from the reaction medium and (iv) optionally, the reaction medium is recycled after optional adjustment of the potassium hydroxide concentration to step (i).. ... Arkema France

02/22/18 / #20180052260

High efficiency diffusion lighting coverings

The invention relates to high efficiency diffusion lighting coverings useful in led lighting applications. The diffusing lighting coverings are made of organic diffusing particles homogeneously dispersed in a transparent polymer matrix. ... Arkema France

02/22/18 / #20180051197

Pressure sensitive adhesives

Pressure sensitive adhesive (psa) compositions that include at least one urethane (meth)acrylate oligomer having a molecular weight between about 2,000 g/mol and about 50,000 g/mol and an oh number of from 0.01 mg koh/g to 100 mg koh/g, at least one mono (meth)acrylate functional monomer and at least one tackifying resin. The psa systems may also optionally include other additives, such as at least one initiator system that includes at least one photo-initiator or free radical initiator. ... Arkema France

02/15/18 / #20180047989

Solid composition of carbon nanofillers for formulations used in lead batteries

The invention relates to the field of lead batteries. More particularly, it relates to a solid composition comprising between 5 and 60 wt. ... Arkema France

02/08/18 / #20180037718

Polyamide composition with delayed combustibility

. . . . The invention relates to a composition which includes: at least one polyamide; at least one melamine derivative as a fire-retardant agent; optionally at least one polyol containing at least four alcohol functional groups; and optionally at least one reinforcement in the form of a fiber. The invention also relates to the method for producing said composition and to the use of same.. ... Arkema France

02/08/18 / #20180037701

Copolymer comprising at least three blocks: polyamide blocks, peg blocks and other blocks

The present invention relates to elastomeric thermoplastic polymers (etp) and especially technical polymers with high added value used in varied sectors, such as electronics, motor vehicles or sport. The present invention more particularly relates to copolymers containing polyether blocks and polyamide blocks, abbreviated as “peba”, which have good antistatic properties. ... Arkema France

02/01/18 / #20180034106

Electrolyte formulation for lithium-ion batteries

The invention concerns an electrolyte composition, comprising: —a lithium bis(fluorosulfonyl)imide salt and/or a lithium 4,5-dicyano-(trifluoromethyl) imidazolate salt; and —a solvent of formula (i): in which: —n is an integer of between 0 and 15, —r1, r2 and r3 represent, independently, a halogen atom or a c1 to c6 linear or branched alkyl group, —x represents either a covalent bond or a c1 to c6 linear or branched alkylene alkenylene or alkynylene group, —y represents either an —(och2ch2)m- group, or an —(n(ch3)ch2ch2)m- group, m being an integer of between 0 and 15, provided that m is different from 0 when x represents a covalent bond, and —r4 represents a cyano, cyanate, isocyanate, thiocyanate or isothiocyanate group.. . ... Arkema France

02/01/18 / #20180029962

Process for the separation of 2-chloro-1,1-difluoroethane and trans-dichloroethylene

The invention relates to the separation of a mixture comprising 2-chloro-1,1-difluoroethane (r142) and trans-dichloroethylene (tdce) by extractive distillation and more particularly to a separation process wherein the tdce is removed selectively by extractive distillation, thus leading to purified 2-chloro-1,1-difluoroethane.. . ... Arkema France

01/18/18 / #20180015645

Process for reducing the assembly time of ordered films of block copolymer

The present invention relates to a process for reducing the assembly time comprising a block copolymer (bcp). The invention also relates to the compositions used to obtain these ordered films and to the resulting ordered films that can be used in particular as masks in the lithography field.. ... Arkema France

01/18/18 / #20180015407

Zeolite adsorbents having a high external surface area and uses thereof

The present invention concerns the use, for gas separation and/or gas drying, of at least one zeolite adsorbent material comprising at least one type a zeolite, said adsorbent having an external surface area greater than 20 m2.g−1, a non-zeolite phase (pnz) content such that o<pnz≦30%, and an si/al atomic ratio of between 1.0 and 2.0. The invention also concerns a zeolite adsorbent material having an si/al ratio of between 1.0 and 2.0, a mesoporous volume of between 0.07 cm3·g−1 and 0.18 cm3·g−1, a (vmicro-vmeso)/vmicro ratio of between −3 and 1.0, non-inclusive, and a non-zeolite phase (pnz) content such that 0<pnz≦30%.. ... Arkema France

01/11/18 / #20180011399

Process for reducing the defects in an ordered film of block copolymer

The present invention relates to a process for reducing the number of defects in an ordered film comprising a block copolymer (bcp). The invention also relates to the compositions used to obtain these ordered films and to the resulting ordered films that can be used in particular as masks in the lithography field.. ... Arkema France

01/11/18 / #20180009968

Composite material via in-situ polymerization of thermoplastic (meth)acrylic resins and its use

The present invention relates to a composite material obtained by in situ polymerization of a thermoplastic resin with a fibrous material. More particularly the present invention relates to a polymeric composite material obtained by in-situ polymerization of a thermoplastic (meth)acrylic resin and a fibrous material containing long fibers and its use, a process for making such a composite material and manufactured mechanical or structured part or article comprising this polymeric composite material.. ... Arkema France

01/11/18 / #20180009736

Reclamation of noble products in a method for producing (meth)acrylic ester

The invention relates to a method for producing a (meth)acrylic ester with improved productivity, by transesterfication of a light alkyl (meth)acrylate with a heavy alcohol. The method of the invention includes the recycling of noble products recovered after the thermal treatment of heavy fractions generated during the synthesis, said thermal treatment being carried out in the presence of a dialkyl phthalate, the alkyl chain of which corresponds to that of the light alkyl (meth)acrylate. ... Arkema France

01/11/18 / #20180008955

Zeolite adsorbents having a high external surface area and uses thereof

The present invention concerns the use, for gas separation, of at least one zeolite adsorbent material comprising at least one fau zeolite, said adsorbent having an external surface area greater than 20 m2·g−1, a non-zeolite phase (pnz) content such that 0<pnz≦30%, and an si/al atomic ratio of between 1 and 2.5. The invention also concerns a zeolite adsorbent material having an si/al ratio such that 1≦si/al<2.5, a mesoporous volume of between 0.08 cm3·g−1 and 0.25 cm3·g−1, a (vmicro−vmeso)/vmicro ratio of between −0.5 and 1.0, non-inclusive, and a non-zeolite phase (pnz) content such that 0<pnz≦30%.. ... Arkema France

01/04/18 / #20180003625

Portable device for the in-line measurement of the hydrogen sulfide concentration of an off-gas

The invention relates to a device and to a method for continuously measuring the hydrogen sulfide concentration of an off-gas by means of a detachable device suitable for being temporarily connected to equipment producing the off-gas. The method comprises a step of measuring the absorption of electromagnetic radiation by the off-gas. ... Arkema France

01/04/18 / #20180002520

Composition comprising a multistage polymer, its method of preparation and its use

The present invention relates to a polymer composition comprising a (meth)acrylic polymer and a multistage polymer. In particular the present invention it relates to polymer composition comprising a (meth)acrylic polymer and a multistage polymer that can be used as a masterbatch. ... Arkema France

01/04/18 / #20180002472

Low-temperature radical polymerisation of alkoxyamines

The present invention relates to a process for the radical polymerization of alkoxyamines at low temperature, typically at temperatures as low as −50° c., in the presence of a photoinitiator.. . ... Arkema France

01/04/18 / #20180001549

Method for producing an object by melting a polymer powder in a powder sintering device

A method for producing an object by melting a polymer powder in a powder sintering device. For example, a method for producing an object by melting a polymer powder in a powder sintering device under a laser beam, implementing a rheological analysis of the polymers, in order to determine the conditions for producing the object by melting polymer powders.. ... Arkema France

12/28/17 / #20170369696

Multistage polymer composition, its method of preparation, its use and composition comprising it

. . . . The present invention relates to a multistage polymer in form of polymeric particles, its composition and its process of preparation. The invention also relates to a multistage polymer in form of polymeric particles made by a multistage process while the last stage comprises a polymer with a low molecular weight. ... Arkema France

12/28/17 / #20170369623

Water-soluble diblock copolymer

The invention relates to the field of block copolymers, particularly to the field of water-soluble or water-dispersible copolymers consisting of two blocks, of which the major block is a hydrophilic thermoplastic block. More particularly, the invention relates to a block copolymer consisting of a partially or totally hydrophilic elastomeric block, with a tg of less than 30° c. ... Arkema France

12/28/17 / #20170368731

Extrusion agent for polyolefins extrudable in the form of fibres

The invention relates to an extrusion-assisting agent containing low-viscosity thermoplastic fluorinated polymers and preferably not containing a synergist. The invention also relates to the use of the extrusion agent for extrusion in the form of monofilament or multifilament fibres or non-woven materials, and to the extrusion method.. ... Arkema France

12/21/17 / #20170362395

Polymer composition, its method of preparation, its use and composition comprising it

. . . . . . The present invention relates to a polymer composition comprising an epoxy resin and a multistage polymer. In particular the present invention it relates to polymer composition comprising an epoxy resin and a multistage polymer that can be used as a masterbatch. ... Arkema France

12/14/17 / #20170355802

Process of manufacturing a multistage polymer, its composition, its use and composition comprising it

. . The present invention relates to a multistage polymer, its composition, its process of preparation, and its use as impact modifier in thermoplastic compositions. More particularly the present invention relates to a process for manufacturing a polymer composition comprising a multistage polymer and its use as impact modifier in thermoplastic compositions.. ... Arkema France

12/14/17 / #20170355801

Multistage polymer, its composition, its method of preparation, its use and composition comprising it

The present invention relates to a multistage polymer, its composition, its process of preparation, and its use as impact modifier in thermoplastic compositions. More particularly the present invention relates a process for manufacturing a multistage polymer, a multistage polymer in thermoplastic compositions, which provides the composition having satisfying thermal stability.. ... Arkema France

12/07/17 / #20170352873

Active electrode material for a li-s battery

The present invention relates to an active material suitable for the production of an electrode, in particular an electrode for a li—s battery. The active material according to the invention comprises carbon nanofillers homogeneously dispersed in the substance of a sulphur material, the active material being obtainable according to a method involving melting in the presence of intense mechanical energy. ... Arkema France

12/07/17 / #20170349714

Production of polyamide powders by ester aminolysis

A method for producing a polycondensate powder dispersion, characterised in that it includes at least one step of polycondensation: i) of at least one diester and at least one diamine, and/or ii) at least one amino ester, while stirring, in a solvent that can solubilise both the diamine and the diester and/or the amino ester but not the polyamide that forms during the polycondensation, at a temperature between 30° c. And the boiling temperature of the solvent, in order to produce a powder precipitate dispersed in the solvent.. ... Arkema France

11/30/17 / #20170342270

Thermoplastic composition made of polyphenylene sulphide and polyamide-grafted polyolefin

. . The present invention relates to a composition that comprises a mixture of polymers, which comprises: a first polymer comprising polyphenylene sulphide, making up 55 wt % to 95 wt % of the mixture; a thermoplastic modifier, making up 5 wt % to 45 wt % of the mixture; optionally one or more functional additives, making up at most 10 wt % of the mixture, preferably at most 5 wt % of the mixture, characterised in that the thermoplastic modifier includes a second polymer which comprises a polyolefin backbone containing a group of at least one unsaturated monomer (x) and a plurality of polyamide grafts. The invention also relates to a multilayer structure including a plurality of adjacent layers, at least one of which consists of the aforementioned composition.. ... Arkema France

11/23/17 / #20170335107

Thermoplastic composite material made of a semi-crystalline polyamide and method for manufacturing same

A composition for a thermoplastic composite material having a thermoplastic matrix made of a semi-crystalline polyamide having a specific composition that includes at least two amide units, a, 55-95 mol %, and b, 5-45 mol %. A corresponds to x.t, wherein x is a c9-c18 linear aliphatic diamine and b corresponds to x′.t, wherein x′ can be b1): a specific branched x-dependent aliphatic diamine, b2): mxd or b3): a linear x-dependent aliphatic diamine, said polyamide having a glass transition temperature tg of at least 90° c. ... Arkema France

11/23/17 / #20170335101

Composition based on poly (arylene ether ketone) having improved properties

A composition based on poly(ether ether ketone) (peek) including poly(ether ketone ketone) (pekk), characterized in that the poly(ether ketone ketone) (pekk) includes a mixture of terephthalic and isophthalic units, the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, being between 55 and 85%, limits included, and preferably between 55 and 70%, the composition including between 1 and 40%, limits included, preferably between 5 and 40% and more preferably still between 10 and 30% by weight of pekk, with respect to the total weight of the composition.. . ... Arkema France

11/23/17 / #20170333334

Removable coating systems and methods

Disclosed herein are coating compositions that may include at least one urethane (meth)acrylate oligomer having a molecular weight between about 2,000 g/mol and about 50,000 g/mol and at least one cycloaliphatic (meth)acrylate. The coating compositions may also optionally include at least one photo-initiator, adhesion promoter, pigment, dye and/or plasticizer. ... Arkema France

11/23/17 / #20170332617

Self-adhesive film for soil fumigation

The present invention relates to the use of a fumigant barrier film for treating soil by fumigation, said film having, on at least one portion of the outer surface thereof or on at least one portion of the inner surface thereof or on at least one portion of the outer and inner surfaces thereof, at least one continuous self-adhesive or self-sticking or tackifying area. The present invention also relates to the method for sealing soil intended for fumigation treatment or in the process of fumigation treatment or which has been treated by fumigation, by covering said soil with a self-adhesive fumigant barrier film, as well as to a kit for fumigation treatment including at least one self-adhesive fumigant barrier film and at least one fumigant.. ... Arkema France

11/16/17 / #20170327442

Process for the preparation of 1-chloro-2,2-difluoroethane

The present invention provides a process for the preparation of 1-chloro-2,2-difluoroethane comprising the following stages: (i) dehydrofluorinating 1,1,1-trifluoro-2-chloroethane to form a product stream comprising 1-chloro-2,2-difluoroethylene, optionally separation of 1-chloro-2,2-difluoroethylene from the product stream and (ii) hydrogenating 1-chloro-2,2-difluoroethylene obtained in stage (i) to give 1-chloro-2,2-difluoroethane.. . ... Arkema France

11/09/17 / #20170321009

Semi-aromatic polyamide preparation method

An industrial method for preparing a semi-aromatic copolyamide having a general formula a/10.t, wherein: a denotes a unit obtained by polycondensing a lactam or a c9-c12 amino acid; and 10.t denotes a unit obtained by polycondensing 1.10-decanediamine and terephtalic acid. The method includes a step for polycondensing the comonomers, the amino acid or the lactam, 1.10-decanediamine and terephtalic acid in the presence of at least one c1-c7 linear aliphatic acid. ... Arkema France

10/26/17 / #20170307973

Method for controlling the level of defects in films obtained with blends of block copolymers and polymers

. . The present invention relates to a method for controlling the level of defects in films obtained using a composition comprising a blend of block copolymers and polymers deposited on a surface. The polymers comprise at least one monomer identical to those present in one or other block of the block copolymers.. ... Arkema France

10/26/17 / #20170306149

Impact modified transparent polyamide polymer composition

The present invention relates to an impact modified polyamide composition. In particular, the present invention relates to impact modified transparent polyarnide compositions comprising a multistage polymer. ... Arkema France

10/26/17 / #20170306087

Specific method for preparing biobased polyesters

The present invention relates to a method for preparing a linear or branched hydroxylated and/or carboxylated polyester resin that is free of unsaturated fatty acids, comprising reacting an acid component with an alcohol component, said acid component comprising at least one c4 to c6 polycarboxylic acid or anhydride, and at least one c8 to c54 polycarboxylic acid or anhydride, and said alcohol component comprising at least one biobased polyol having a functionality of at least 2 bearing a 1,4:3,6-dianhydrohexitol unit, and at least one of two polyols b2) and b3).. . ... Arkema France

10/26/17 / #20170304800

Zeolite-based adsorbents based on lsx zeolite of controlled outer surface area, process for preparing them and uses thereof

The present invention relates to a zeolite-based adsorbent comprising at least one zeolite of fau structure of lsx type and comprising barium and/or potassium, in which the outer surface area of said zeolite-based adsorbent, measured by nitrogen adsorption, is between 20 m2·g−1 and 100 m2·g−1, limits inclusive. The present invention also relates to the use of such a zeolite-based adsorbent as an adsorption agent, and also to the process for separating para-xylene from aromatic isomer fractions containing 8 carbon atoms.. ... Arkema France

10/12/17 / #20170291989

Biobased hydroxyl or carboxyl polyester resins

The present invention relates to a linear or branched structured hydroxylated or carboxylated polyester resin that is free of unsaturated fatty acids, that is made from an acid component and an alcohol component, said acid component comprising at least one c4 to c6 carboxylic polyacid or anhydride, and at least one c5 to c54 carboxylic polyacid or anhydride, and with said alcohol component comprising at least one biobased polyol having a functionality of at least 2 bearing a 1,4:3,6-dianhydrohexitol unit, and at least one of two polyols b2) and b3).. . ... Arkema France

10/05/17 / #20170283358

(meth)acrylic acid production process

The invention relates to the production of (meth)acrylic acid, and to implementation of a step of condensing water contained in a recycled gas effluent and/or in the air feed in a (meth)acrylic acid production process, which further includes a process for purifying a reaction mixture comprising (meth)acrylic acid without using azeotropic solvent and based on the use of two distillation columns.. . ... Arkema France

09/28/17 / #20170274350

Zeolite nanocrystal aggregates

The present invention relates to a zeolite material in the form of fau zeolite nanocrystal aggregates, to the method for preparing said material, to the zeolite agglomerates prepared from said material with a binder, and to the uses of said material and agglomerate as adsorbents for gas-phase or liquid-phase separation operations, and particularly in methods for separating gas or liquid flows.. . ... Arkema France

09/21/17 / #20170267624

Improved method for producing alkyl (meth)acrylates

The present invention relates to a method for producing a c4-c10 alkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification reactor comprising a cationic resin as a catalyst. Said method is characterized in that the molar ratio of alcohol to acid at the inlet of the reactor is between 1.4 and 3, and in that the crude reaction mixture circulates in a recirculation loop joining the reactor and the water removal column, at a recirculation rate of between 6 and 25, expressed by the mass ratio between the flow fed into the loop and the flow sent to a purification treatment.. ... Arkema France

09/21/17 / #20170267612

Process for producing 1-chloro-2,2-difluoroethane

The present invention relates to the field of saturated fluorohydrocarbons. The subject matter thereof is more particularly the production of 1-chloro-2,2-difluoroethane from 1,1,2-trichloroethane and/or 1,2-dichloroethylene. ... Arkema France

09/14/17 / #20170260437

Heat transfer fluids comprising difluoromethane, pentafluoroethane, tetrafluoropropene and optionally propane

A composition includes between 11 and 13 wt. % of difluoromethane; between 58 and 62 wt. ... Arkema France

08/17/17 / #20170233366

Method for preparing trioxane

. . The present invention concerns a method for preparing 1,3,5-trioxane by trimerization of formaldehyde in the presence of methanesulfonic acid. The invention also concerns the use of at least one catalyst comprising methanesulfonic acid for the trimerization of formaldehyde into 1,3,5-trioxane.. ... Arkema France

08/17/17 / #20170232152

Use of peba having long blocks for the manufacture of all or part of a catheter

A copolymer containing polyether blocks and polyamide blocks for manufacturing an inflatable catheter element, such as a catheter balloon, with improved bursting strength, in which said copolymer has the following characteristics: number-average molecular mass of the pe blocks greater than 500 g/mol, and number-average molecular mass of the pa blocks greater than 10 000 g/mol.. . ... Arkema France

08/10/17 / #20170226318

Aqueous emulsion of dialkyl peroxide

. . An aqueous emulsion of dialkyl peroxide has at least one dialkyl peroxide in liquid form at room temperature, representing between 10% and 75% by weight of the emulsion, at least one emulsifier representing from 0.01% to 10% by weight of the emulsion, optionally, at least one antifreeze, optionally at least one functional additive, water, the amount of which is determined so as to form the rest of said emulsion (100%), characterized in that the emulsifier is a polyethoxylated nonionic surfactant. Also, a process for preparing this aqueous emulsion.. ... Arkema France

08/10/17 / #20170226032

Compositions containing 1,1,1,3,3-pentachloropropane

The invention first relates to a composition comprising at least 99 wt. % of 1,1,1,3,3-pentachloropropane and at least one compound selected from a list of additional compounds consisting of dichloropropanes, trichloropropanes, tetrachloropropanes, pentachloropropanes different from 1,1,1,3,3-pentachloropropane, hexachloropropanes, heptachloropropanes, chloropropenes, dichloropropenes, trichloropropenes, tetrachloropropenes, pentachloropropenes and hexachloropropene, the weight content of said compound in the composition being lower than or equal to 500 ppm.. ... Arkema France

08/03/17 / #20170222078

Photovoltaic module comprising a polymer front face

A photovoltaic module including a transparent first layer forming a front face, plural photovoltaic cells, and an assembly encapsulating the photovoltaic cells. The first layer includes plural plates independent from each other, each plate located opposite a photovoltaic cell. ... Arkema France

08/03/17 / #20170218242

Heat transfer method

A heat transfer method using ternary compositions containing 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane and difluoromethane, said compositions being especially interesting as a heat transfer fluid in compression refrigeration systems comprising exchangers operation in counterflow mode or in split flow mode with counterflow tendency. The use of a ternary composition of 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane and difluoromethane as heat transfer fluid in compression-type refrigeration systems with exchangers operating in countercurrent mode or in crossed-current mode with countercurrent tendency.. ... Arkema France

08/03/17 / #20170218241

Composition containing 2,3,3,3-tetrafluoropropene and 1,2-difluoroethylene

Compositions containing 2,3,3,3-tetrafluoropropene and 1,2-difluoroethylene, that can be used in multiple fields of application. The composition can include from 45 to 90 mol % of 2,3,3,3-tetrafluoropropene and from 55 to 10 mol % of, 1,2-difluoroethylene. ... Arkema France

07/27/17 / #20170210962

Composition including 2,3,3,3-tetrafluoropropene

A composition including the compound hfo-1234yf and at least one other, additional, compound selected from hcfc-240db, hcfo-1233xf, hcfc-243db, hcfo-1233zd, hcc-40, hcfc-114a, hcfc-115, hcfc-122, hcfc-23, hcfc-124, hcfc-124a, hfc-125, hcfc-133a, hcfc-142, hcfc-143, hfc-52a, hcfc-243ab, hcfc-244eb, hfc-281ea, hco-1110, hcfo-1111, hcfo-1113, hcfo-1223xd, and hcfo-1224xe. A composition including the compound hfo-1234yf and at least two compounds selected from hfo-1234ze, hfc-245cb, hfc-134a, hcfc-115, hfc-152a, hcc-40 and hfo-1243zf.. ... Arkema France

07/27/17 / #20170210960

Azeotropic or quasi-azeotropic composition of chloromethane

Quasi-azeotropic or azeotropic compositions containing chloromethane and at least one or more compound(s) selected from 2,3,3,3-tetrafluoropropene, 3,3,3-trifluoropropene, 1,1,1,2-tetrafluoroethane, 1,1,1,2,2-pentafluoropropane, e/z-1,1,3,3,3-pentafluoropropene, e/z-1,2,3,3,3-pentafluoropropene, 1,1-difluoroethane and e-1,3,3,3-tetrafluoropropene. The composition may include either from 0.5 to 70 mol % of chloromethane and at least from 99.5 to 30 mol % of a compound selected from 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane, 3,3,3-trifluoropropene and 1,1,1,2-tetrafluoroethane, or from 55 to 95 mol % of chloromethane and at least from 45 to 5 mol % of one or more compound(s) selected from 1,1,1,2,2-pentafluoropropane, e/z-1,1,3,3,3-pentafluoropropene, e/z-1,2,3,3,3-pentafluoropropene and e-1,3,3,3-tetrafluoropropene.. ... Arkema France

07/27/17 / #20170210686

Process for manufacturing tetrafluoropropene

A process for manufacturing tetrafluoropropene, including, alternately: at least one step of reacting a chlorinated compound with hydrofluoric acid in the gas phase, in the presence of a fluorination catalyst, the proportion of oxygen optionally present being less than 0.05 mol. % relative to the chlorinated compound; a step of regenerating the fluorination catalyst by bringing the fluorination catalyst into contact with a regeneration stream including an oxidizing agent. ... Arkema France

07/13/17 / #20170200977

Lithium-sulphur cell

. . The present invention relates to a lithium-sulphur cell comprising an anode comprising lithium metal or lithium metal alloy;a cathode comprising a mixture of electroactive sulphur material and solid electroconductive material; and a liquid electrolyte comprising at least one lithium salt and a solvent comprising a dinitrile.. . ... Arkema France

07/13/17 / #20170197204

Method for eliminating metal ions from a viscous organic solution

The invention relates to a method for eliminating metal ions from a viscous organic solution, the viscosity of which at 20° c. Is between 1 and 1000 cp. ... Arkema France

06/29/17 / #20170183457

Multistage polymer powder composition, its method of preparation and use

The present invention relates to halogenated containing polymer composition with a modifier that is a polymeric processing aid in form a non dusty polymer powder made by a multistage process while the last stage uses ethyl acrylate as major monomer.. . ... Arkema France

06/29/17 / #20170183430

Manufacture of ethylene/carboxylic acid vinyl ester copolymers from renewable materials, copolymers obtained and uses

A process for the manufacture of copolymers of ethylene and of at least one vinyl ester, including the following steps: a) fermentation of renewable starting materials so as to produce at least one alcohol comprising ethanol; b) dehydration of the alcohol obtained so as to produce at least one alkene comprising ethylene and, optionally, purification of the alkene so as to obtain ethylene, c) copolymerization of the ethylene with at least one vinyl ester, d) isolation of the copolymer obtained. Also, the copolymers of ethylene and of at least one vinyl ester in which the ethylene is at least partly obtained from renewable starting materials, and to uses thereof.. ... Arkema France

06/22/17 / #20170174847

Polymer powder composition and its method of preparation

. . The present invention relates to a non dusty polymer powder composed of aggregated latex particles prepared by a multistage preparation process.. . ... Arkema France

06/22/17 / #20170174829

Polyester resins based on fatty acids that have a short oil length, aqueous dispersions and associated coatings

The invention relates to a polyester resin which is based on at least one fatty acid, with zero oil length (0%) or an oil length of between 0 and 35%, with a weight ratio of oxidizable fatty acids (monoacids), relative to the overall fatty acids, of 0 or greater than 0 and ranging up to 1, and which is based on an acid component comprising, in addition to the fatty acid, from 30% to 85% by weight, relative to the total weight of said resin, of rosin and/or of derivatives thereof bearing at least one carboxylic acid function.. . ... Arkema France

06/22/17 / #20170174589

Process for the manufacture of 2,3,3,3-tetrafluoropropene by gas phase fluorination of pentachloropropane

The present invention provides a process of catalytic fluorination in gas phase of product 1,1,1,2,3-pentachloropropane or/and 1,1,2,2,3-pentachloropropane into product 2,3,3,3-tetrafluoropropene in presence of a catalyst.. . ... Arkema France

06/22/17 / #20170172910

Cosmetic composition for lightening the skin

A composition including a support including porous polyamide particles, having a specific surface area bet greater than or equal to 8 m2/g, glycyrrhiza glabra root extract as a cosmetic active substance impregnated on the support. Also, cosmetic products incorporating said composition, in particular for lightening the skin. ... Arkema France

06/15/17 / #20170166726

Use of mixtures of monoperoxycarbonate peroxides for the cross-linking and composition of cross-linkable polymers

The use of peroxide(s) for cross-linking at least one polymer, the polymer having a homopolymer or copolymer of ethylene and especially the ethylene-vinyl acetate copolymer (eva) or a mixture of the eva with another homopolymer or copolymer of ethylene, and at least one peroxide, wherein the peroxide includes oo-tert-butyl o-isopropyl monoperoxycarbonate or oo-tert-amyl o-isopropyl monoperoxycarbonate and oo-tert-butyl-o-2-ethyl hexyl monoperoxycarbonate or oo-tert-amyl-o-2ethyl hexyl monoperoxycarbonate. Also, a cross-linkable composition including the peroxide and to a method for producing a cross-linked polymer as a result of the peroxide.. ... Arkema France

06/15/17 / #20170166507

Method for the production of bio-sourced acrylic acid

The present invention relates to the manufacture of biobased acrylic acid from glycerol as starting material, the term “biobased acid” indicating that the acrylic acid is essentially based on a carbon source of natural origin.. . ... Arkema France

06/15/17 / #20170165875

Method of producing a fibrous material pre-impregnated with thermoplastic polymer in a fluid bed

A method of producing a pre-impregnated fibrous material including a fibrous material of continuous fibres and a thermoplastic polymer matrix, wherein the pre-impregnated fibrous material is produced in a single unidirectional strip or in a plurality of parallel unidirectional strips, the method including the following steps: (i) impregnating the fibrous material in the form of a strand or a plurality of parallel strands with the thermoplastic polymer in the form of a powder in a fluid bed; and (ii) shaping the strand or parallel strands of the fibrous material impregnated as in step (i) by calendering by at least one heating calender in the form of a single unidirectional strip or of a plurality of parallel unidirectional strips, the heating calender, in the latter case, including a plurality of calendering grooves, and the pressure and/or a spacing between the rollers of the calender being regulated by an auxiliary system.. . ... Arkema France

06/08/17 / #20170158803

Urethane acrylic polymers with unique physical properties

. . A polymer comprising a reaction product of the ingredients including [i] a first homopolymeric or co-polymeric polycarbonate polyol; [ii] an organic polyisocyanate; and [iii] a hydroxy-functional (meth)acrylate having the given formula; and with the proviso that when the first polycarbonate polyol is not co-polymeric, then the ingredients further includes [iv] a second homopolymeric or co-polymeric polycarbonate polyol different from the first one, and wherein the polycarbonate polyol(s) is/are linked to the polyisocyanate via a urethane linkage, and wherein the polyisocyanate is linked to the alkyl moiety of the (meth)acrylate via a urethane linkage.. . ... Arkema France

06/08/17 / #20170158631

Method for preparing methyl mercaptan

The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (h2s) and optionally sulphur (s) such as to form carbon disulphide (cs2) and hydrogen (h2); b) reacting said carbon disulphide (cs2) by hydrogenation in the presence of said hydrogen (h2) obtained in step a) such as to form methyl mercaptan (ch3sh), hydrogen sulphide (h2s) and possibly hydrogen (h2); c) optionally recirculating said hydrogen sulphide (h2s) formed during step b) to step a); and d) recovering the methyl mercaptan.. . ... Arkema France

05/18/17 / #20170137676

Adhesive sealing composition

An adhesive composition that can be used in an extrusion-coating process for application to a support or in an extrusion-laminating process in order to bond several supports of different or identical nature to one another, over a wide temperature range, including: from 91% to 98% by weight of the composition, of a copolymer of ethylene and of alkyl acrylate; at least one tackifying resin; processing aids, wherein the tackifying resin represents between 1.5% and 5.5% of the weight of the composition and the processing aids represent between 0.5% and 3.5% of the weight of the composition and the anti-blocking agent represents, in the processing aids, at least 60% by weight of the aids. Also, a film of the composition and a multilayer structure that includes this film.. ... Arkema France

05/11/17 / #20170130008

Fine powder of polyamide from renewable materials and method for making such a powder

The present invention relates to a powder of polyamide pa (homopolyamide or copolyamide) derived at least partially from renewable materials, in which the particles have a nonspherical shape and a volume median diameter of less than or equal to 20 μm. The present invention also relates to a process for preparing such a powder.. ... Arkema France

05/11/17 / #20170130000

Polyamides based on aminoalkylpiperazine or aminoarylpiperazine for hot-melt adhesives

A semi-crystalline polyamide including at least one monomer resulting from the condensation of a diacid and of a diamine of formula ap.y, the semi-crystalline polyamide having the following general formula (i): ap.y/(a)m/(pip.y′)n/(b.y″)q and the semi-crystalline polyamide having an mp1 less than or equal to approximately 150° c., in particular less than or equal to approximately 130° c., in particular less than or equal to approximately 120° c. And/or a tg less than or equal to approximately 60° c., in particular less than or equal to approximately 50° c., in particular less than or equal to approximately 40° c., as determined respectively by dsc according to standard iso 11357-3 (2013) and iso 11357-2 (2013).. ... Arkema France

05/04/17 / #20170125620

Encapsulant of a photovoltaic module

. . An encapsulant of a photovoltaic module, intended for coating a photovoltaic cell, having a composition which does not include any cross-linking agent and including: an ethylene—alkyl acrylate copolymer, the copolymer making up 70% to 96% of the weight of the composition; a silane, making up 0.1% to 2% of the weight of the composition; wherein the composition also includes a terpolymer of ethylene—acrylic ester—maleic anhydride or glycidyl methacrylate, the terpolymer making up 2% to 29.9% of the weight of the composition. Also relates to the use of such an encapsulant in a photovoltaic module as well as to a photovoltaic module including such an encapsulant.. ... Arkema France

05/04/17 / #20170123116

Optical diffusion blend materials for led lighting

The invention relates to blend materials useful in led lighting applications. The diffusing particle blend is a synergistic mixture of selected organic particles and selected inorganic particles of specific composition, loading, and a refractive index difference with the matrix polymer, that provide excellent light diffusion, high hiding properties and good light transmission. ... Arkema France

05/04/17 / #20170122134

System for controlling a rankine cycle

A system for producing electricity, including a closed circuit of heat-transfer fluid which includes an evaporator, an expansion member, a condenser and a circulation pump, a generator being coupled to the expansion member, in which system a liquid-vapour separator provided with a liquid reservoir is positioned between the evaporator and the expansion member, the system being further provided with a control device configured to empty the reservoir if the liquid level in the reservoir reaches a maximum threshold.. . ... Arkema France

05/04/17 / #20170121280

Organic solvent for peroxides

A peroxide solution of organic peroxide in an organic solvent, including at least one peroxide in a solvent, the solvent having a hydrophobic alcohol wherein the main carbonated chain having the alcohol function includes at least six carbon atoms, the solution also including a second, hydrophilic alcohol solvent representing a maximum of 15% wt. % of the solution. ... Arkema France

04/27/17 / #20170117426

Encapsulant of a photovoltaic module

An encapsulant of a photovoltaic module, intended for coating a photovoltaic cell (10), including: a copolymer of ethylene-alkyl acrylate, the melt flow index (mfi) of the copolymer being 1 g/10 min to 40 g/10 min; and a silane making up 0.1% to 0.5% of the weight of the composition; wherein the encapsulant also includes a cross-linking agent making up 0.1% to 0.5% of the weight of the composition and wherein the copolymer makes up at least 99% of the weight of the composition. Also, a use of such an encapsulant in a photovoltaic module as well as to a photovoltaic module including such an encapsulant.. ... Arkema France

04/27/17 / #20170113990

Process for direct synthesis of (meth)acrolein from ethers and/or acetals

The subject matter of the present invention is a process for direct synthesis of (meth)acrolein from a reactive mixture comprising at least one compound chosen from ethers, acetals or hemiacetals derived from linear alcohols comprising from 1 to 3 carbon atoms. Examples of compounds are dimethyl ether, diethyl ether, methyl ethyl ether, dimethoxymethane, diethoxymethane, dipropoxymethane, 1,1-dimethoxyethane or 1,1-diethoxyethane. ... Arkema France

04/27/17 / #20170113932

Hyrogen peroxide purification process and hyrogen peroxide

A hydrogen peroxide purification process, including supplying a starting stream containing hydrogen peroxide at a content above 50 wt %, as well as at least one stabilizer; a single step of purification of the starting stream, the single step having purification by reverse osmosis; collecting a purified stream at the end of said single purification step, in which purification by reverse osmosis includes: passing the starting stream over a first membrane; collecting a permeate and a retentate from the first membrane; passing the permeate from the first membrane over a second membrane; collecting a permeate and a retentate from the second membrane, the purified stream having the permeate from the second membrane.. . ... Arkema France

03/30/17 / #20170088500

Method for producing acrolein and/or acrylic acid from glycerol

. . The invention relates to the production of acrolein and/or acrylic acid from glycerol, and more particularly to a method for continuous production of a stream comprising acrolein by dehydration of glycerol, comprising cycles of reaction and regeneration of a dehydration catalyst.. . ... Arkema France

03/23/17 / #20170081577

Composition containing 1,1,-difluoroethane and 3,3,3-trifluoropropene

Compositions containing 1,1-difluoroethane and 3,3,3-trifluoropropene, that can be used in multiple fields of application. The composition may include from 25 to 65 mol % of 1,1-difluoroethane and from 75 to 35 mol % of 3,3,3-trifluoropropene at a temperature of between −25° c. ... Arkema France

03/23/17 / #20170080773

Vehicle heating and/or air conditioning method

A method for the heating and/or air conditioning of the passenger compartment of an automobile using a reversible cooling loop in which flows a coolant containing 2,3,3,3-tetrafluoropropene. The method is particularly useful when outdoor temperature is lower than −15° c. ... Arkema France

02/23/17 / #20170051096

Curable urethane (meth)acrylate polymer compositions and methods

. . An ethylenically unsaturated polyurethane, which is an oligomer or polymer, results from the reaction of a) an alcohol component comprising: a1) at least one hydroxylated polydiene oligomer or polymer which may optionally be alkoxylated and a2) at least one hydroxyl-functional ethylenically unsaturated compound, which is a monomer or oligomer, bearing at least one ethylenic unsaturation and b) an isocyanate component comprising at least one polyisocyanate with a functionality of at least 2, wherein the molar ratio oh/nco is greater than 1 and wherein said polyurethane bears reactive free hydroxyl groups. Such ethylenically unsaturated polyurethanes are useful as components of curable compositions such as coatings or adhesives.. ... Arkema France

02/23/17 / #20170049684

Curable aqueous polyurethane dispersions made from renewable resources

A curable aqueous polyurethane dispersion is formed by reacting a polyol component with a polyisocyanate. The polyol component comprises a1) at least one non-ionic polyol, a2) at least one polyol bearing at least one ionic or potentially ionic group comprising an acid group or salt thereof and a3) at least one ethylenically unsaturated monoalcohol or polyol. ... Arkema France

02/23/17 / #20170049683

Nail polish composition based on solvent-free aqueous polyurethane dispersions

A nail polish composition, in particular nail polish formulation, is disclosed which is based on a specific solvent-free aqueous polyurethane polymer dispersion, which is derived from at least one isocyanate-terminated ethylenically unsaturated polyurethane pre-polymer in a reactive diluent, after a chain extension reaction with a chain extender bearing isocyanate-reactive groups. The polyurethane pre-polymer comprises at least one (meth)acrylate functional group and at least one isocyanate functional group.. ... Arkema France

02/16/17 / #20170047142

Use of a vitrimer-type thermosetting resin composition for manufacturing electrical insulation parts

. . The present invention relates to the use, for manufacturing electrical insulation parts, of a composition including, in addition to an epoxy-type thermosetting resin and a hardening agent, at least one organic catalyst having a vitrimer effect. Said composition allows the production of vitrimer resins, i.e., resins that are deformable in the thermoset state, which have properties that are suitable for use in electrical insulation parts. ... Arkema France

02/16/17 / #20170044361

Composition for manufacturing vitrimer resins of epoxy/anhydride type comprising a polyol

The present invention relates to a composition containing, besides a thermosetting resin of epoxy type and/or a hardener, at least one vitrimer effect catalyst and at least one polyol selected from linear, branched or cyclic alkanes containing at least two hydroxyl functions. This composition enables the manufacture of vitrimer resins, that is to say resins that can be deformed in the thermoset state. ... Arkema France

02/16/17 / #20170044317

Method for manufacturing a thermoplastic material made from semi-crystalline polyamide

The invention relates to a method for manufacturing a thermoplastic material, in particular a mechanical part made from said material, characterised in that it includes at least one step of injection moulding a polyamide composition for a thermoplastic material or a composition of a thermoplastic material, or a step implemented by extrusion of same, said material including a thermoplastic matrix made from at least one thermoplastic polymer.. . ... Arkema France

02/16/17 / #20170044305

Composition for manufacturing epoxy/anhydride vitrimer resins including an organic catalyst

The present invention relates to a composition containing, in addition to a thermosetting epoxy resin and an anhydride hardener, at least one vitrimer-effect organic catalyst. Said composition enables vitrimer resins to be manufactured, i.e., resins that are deformable in the thermoset state. ... Arkema France

02/16/17 / #20170044082

Process for the preparation of fluoroolefin compounds

The subject of the invention is a process for the preparation of fluoroolefin compounds. It relates more particularly to a process for manufacturing a (hydro)fluoroolefin compound comprising (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at least one hydrogen atom, provided that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, into contact with potassium hydroxide in a stirred reactor, containing an aqueous reaction medium, equipped with at least one inlet for the reactants and with at least one outlet, in order to give the (hydro)fluoroolefin compound, which is separated from the reaction medium in gaseous form, and potassium fluoride, (ii) bringing the potassium fluoride formed in (i) into contact, in an aqueous medium, with calcium hydroxide in order to give potassium hydroxide and to precipitate calcium fluoride, (iii) separation of the calcium fluoride precipitated in step (ii) from the reaction medium and (iv) optionally, the reaction medium is recycled after optional adjustment of the potassium hydroxide concentration to step (i).. ... Arkema France

02/09/17 / #20170040640

Composition including a pentacyclic anion salt and use thereof as a battery electrolyte

A composition including: (i) a lithium salt of imidazole compound of formula (i): wherein rf is a fluorinated alkyl group having 1 to 5 carbon atoms, or a fluorine atom; and (ii) at least one cation selected from the group a including sodium, potassium, calcium, iron, magnesium, manganese, strontium, vanadium, ammonium, silver, aluminium, arsenic, barium, silicon, cadmium, cobalt, chromium, copper, nickel, lead, antimony, selenium, tin, strontium and titanium; and (iii) at least one anion chosen from the group b including fluoride, chloride, nitrate, sulphate, phosphate, trifluoroacetate, pentafluoroacetate and the anion of formula (ii), with all the cation(s) and anion(s) being more than 0 wt % and at most 1 wt % of the composition. Also, the preparation of the composition as well as to the use of the composition as a battery electrolyte.. ... Arkema France

02/09/17 / #20170037291

Composition based on 2,3,3,3-tetrafluoropropene

A composition including a lubricant based on polyol esters (poes) or polyvinyl ether (pve) and a refrigerant f including from 1 to 99% by weight of 2,3,3,3-tetrafluoropropene (hfo-1234yf) and from 1 to 99% by weight of trans-1,3,3,3-tetrafluoropropene (trans-hfo-1234ze). Also, the use of the composition in refrigeration, air conditioning and heat pumps.. ... Arkema France

02/09/17 / #20170037208

Method for a composite material impregnated with thermoplastic polymer, obtained from a prepolymer and a chain extender

A process for a composite material, including an assembly of one or more reinforcing fibers, impregnated with at least one thermoplastic polymer with a glass transition temperature tg of less than or equal to 75° c. And a melting point of from 150° c. ... Arkema France

02/09/17 / #20170037204

Thermoplastic composite material made from a semi-crystalline polyamide and method for manufacturing same

A composition for a thermoplastic composite material, wherein said matrix thermoplastic polymer is a semi-crystalline polyamide polymer including amide units z, 10t and 6t; wherein z corresponds to an amide unit resulting from the condensation of at least one lactam or at least one c6-c14 amino acid, from the condensation of a diamine and a diacid x.y, x and y being at c4-c18, the molar rate of z being 0.0%<z≦30.0%; 10t is a majority amide unit resulting from the condensation of a c10 diamine and terephthalic acid, provided in a molar rate of 40.0% to 95.0%; and 6t is an amide unit resulting from the condensation of a c6 diamine and terephthalic acid, provided in a molar rate of 5.0% to 60.0%.. . ... Arkema France

02/09/17 / #20170037199

Composition and method for composite material impregnated with semi-crystalline polyamide, obtained from a prepolymer and a chain extender

A molding composition including at least one semi-crystalline polyamide derived from the polyaddition of a) at least one polyamide prepolymer bearing n identical functions x chosen from carboxyl, amine and hydroxyl, and of b) at least one non-polymeric reactive extender bearing two identical functions y that are reactive with said functions x with n ranging from 1 to 3, the polyamide and prepolymer a) including 55 mol % to 95 mol % of amide units a, 5 mol %-45 mol % of amide units b with a corresponding to x.t in which x is a linear aliphatic c9-c18 diamine and b corresponding to x′.t in which x′ may be b1): specific branched aliphatic diamine dependent on x or b2): mxd or b3): linear aliphatic diamine which depends on x, the polyamide having a tg of at least 90° c. And a tm of less than or equal to 280° c.. ... Arkema France

02/09/17 / #20170037186

Composition and method for a composite material impregnated with reactive composition of a polyamide prepolymer and a diepoxide chain extender

A reactive molding composition including a precursor reactive composition of a semi-crystalline thermoplastic polymer which is a semi-crystalline polyamide and optionally at least one fibrous reinforcement and with said precursor composition including a) at least one polyamide prepolymer bearing n identical functions x chosen from carboxyl and amine and b) at least one non-polymeric extender bearing two epoxy functions y that are reactive with said functions x with n ranging from 1 to 3, said polymer and prepolymer a) being of specific composition comprising 55 mol % to 95 mol % of at least two amide units a, and 5 mol % to 45 mol % of amide units b with a corresponding to x.t in which x is a linear aliphatic c9-c18 diamine and b corresponding to x′.t, said polyamide having a tg of at least 80° c. And a tm of less than or equal to 280° c.. ... Arkema France

02/09/17 / #20170037185

Thermoplastic composition made from a polyamide polymer obtained from a prepolymer and a chain extender and manufacturing method

A composition including at least one polyamide polymer obtained from at least one reactive polyamide prepolymer including at least one chain extender (pa1-all1-pa1), the polyamide polymer being prepared at a temperature t1 no lower than the temperature melting temperature or glass transition temperature of the polymer and having a mean molecular weight mn1. The composition has a melt viscosity which can be modulated according to the temperature to which the composition is exposed, wherein the temperature is between t2 and t3, t2 and t3 being higher than t1, and the melt viscosity η2 or η′3 observed at the temperature t2 or t3, respectively, being lower than the melt viscosity η2 or η3 of the polyamide polymer, which does not include a chain extender and has the same mean molecular weight mn1(pa1) observed at the same temperature t2 or t3. ... Arkema France

02/09/17 / #20170036428

Weatherable first surface over a tie layer over a pultruded substrate

The invention relates to a multilayered pultruded structure having a weatherable cap layer over a pultruded substrate, adhered with an appropriate tie layer. The structure provides improved weatherability and surface quality for pultruded structures. ... Arkema France

01/26/17 / #20170025709

Improving the ion conductivity of an electrolyte based on lithium imidazolate salts

The invention relates to a composition comprising at least one electrolyte based on lithium imidazolate salts and to the use of nitrile or dinitrile solvents to increase the ion conductivity of electrolyte based on lithium imidazolate salts. The invention also relates to the use of the electrolyte composition in li-ion batteries.. ... Arkema France

01/26/17 / #20170022363

Novel impact-modified thermoplastic composition having a higher level of fluidity in the melted state

A composition including: between 45 and 94.95 wt. % of a matrix having at least one polyamide; between 0.05 and 20 wt. ... Arkema France

01/12/17 / #20170009033

Impregnation process for a fibrous substrate, a liquid monomer syrup for the impregnation process, its method of polymerization and structured article obtained thereof

The present invention relates to an impregnation process for a fibrous substrate, a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. ... Arkema France

01/12/17 / #20170008840

Sulfur-containing phenol derivatives

The present invention relates to a novel process for preparing sulfur-containing phenolic compounds, and to novel phenol derivatives substituted with at least one radical comprising a sulfur atom. Said sulfur-containing phenolic compounds are of use in numerous industrial fields, particularly the chemical industry, and said compounds are particularly suitable as, for example, antioxidant agents, uv stabilizers, heat stabilizers, and for other uses.. ... Arkema France

01/05/17 / #20170002207

Impregnation process for a functional fibrous substrate, a liquid monomer syrup for the impregnation process, its method of polymerization and structured article obtained thereof

The present invention relates to an impregnation process for a functional fibrous substrate, a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated functional fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. ... Arkema France

01/05/17 / #20170002127

Process for the nanostructuring of a block copolymer film using a nonstructured block copolymer based on styrene and on methyl methacrylate, and nanostructured block copolymer film

The invention relates to a block copolymer film nanostructured in nanodomains at a predetermined temperature, obtained from a basic block copolymer which is nonstructured at said predetermined temperature, and at least one block of which comprises styrene and at least another block of which comprises methyl methacrylate. The block copolymer film is useful for forming nano-lithography masks.. ... Arkema France








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