Coatex patents

   Method for deinking recycled paper

A method for deinking recycled paper, including a pulping step, and then a flotation step, which includes introduction of at least one dispersant of the polyacrylate type, representing from 0.05 to 3.5 wt % of the mineral fillers of the recycled paper. A specific dispersant is used during the flotation... Coatex

Novel copolymer as a water-reducing agent in a hydraulic composition and use of copolymers for improving the early mechanical strength of a hydraulic composition

where [(EO)n-(PO)m] represents a polyalkoxylated chain consisting of ethoxylated units EO and propoxylated units PO, distributed into blocks, alternating or statistical, the molar proportion of the ethoxylated units in the polyalkoxylated chain (n)/(m+n) being greater than or equal to 70% and strictly less than 90%. In addition, hydraulic composition, for... Coatex

Polymeric microparticles

d) optionally at least one active agent.... Coatex

Thickening agent for aqueous systems, formulations containing same and uses thereof

The present invention relates to novel associative thickeners belonging to the category of the HEUR (Hydrophobically modified Ethoxylated URethanes), and also intermediate aqueous formulations containing such thickeners, and the final compositions, for example paint, lacquer, varnish or paper coating colour compositions.... Coatex

Dispersion and/or grinding aid agents of kaolin in aqueous suspension, aqueous suspensions obtained and uses thereof

The present invention relates to a ternary mixture consisting of at least one homopolymer or copolymer of (meth)acrylic acid, partially or completely neutralized with sodium, with potassium, with lithium and/or with an amine, at least one solution of silicate or metasilicate chosen from the group consisting of a sodium silicate... Coatex

Method for the polymerisation of (meth)acrylic acid in solution

R represents an alkyl chain comprising from 1 to 5 carbon atoms.... Coatex

Continuous esterification and/or amidification method, without organic solvent, of an acid homopolymer or copolymer

The present invention relates to a continuous process for preparing a comb polymer, without organic solvent, by esterification and/or amidification of an acidic homopolymer or copolymer, which consists in performing the esterification and/or amidification of said homopolymer/copolymer by reaction at elevated temperature in the mixing and transportation zone of a... Coatex

Method for the continuous production of anionic polymers using radicals

The invention relates to a novel method for the continuous production of anionic polymers by radical polymerization. The polymers produced by said method have a controlled molecular weight.... Coatex

Fabric-softening composition comprising an heur thickener

c) of at least one polyisocyanate.... Coatex

Aqueous lime slurry, preparation process and uses

Preparation of aqueous slurries of calcium dihydroxide. Preparation of aqueous suspensions of calcium hydroxide.... Coatex

Fabric softening composition comprising a heur thickener

c) of at least one polyisocyanate.... Coatex

Thickening agent for aqueous systems, formulations containing same and use thereof

The present invention relates to novel associative thickeners belonging to the category of the HEURs (Hydrophobically modified Ethoxylated URethanes) comprising an associative compound of bicycloheptane type for thickening aqueous compositions, and also to formulations compositions comprising such thickeners and to the final compositions, for example paint, lacquer, varnish or paper... Coatex

Production of pcc

The present invention is directed to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a milk of lime is prepared by mixing water, a calcium oxide containing material, at least one water-soluble polymer having a molecular weight Mw in the range from 200 to 6500 g/mol,... Coatex

Use of copolymers of styrene and of maleic anhydride for preparing particles of mineral matter

The present invention relates to the use of copolymers obtained by polymerization of maleic anhydride and of styrene, for preparing particles of mineral matter having a weight-loss start temperature greater than or equal to 220° C., as measured by thermogravimetric analysis (TGA) between 150° C. and 600° C.... Coatex

Method for thickening a cosmetic formulation using an alkali swellable emulsion of a polymer with amps and which is rich in acrylic acid

Process for thickening a composition, through the use of a direct emulsion in water, which is alkali-swellable, of a polymer of the ASE or HASE type, which is both rich in acrylic acid and which has a certain quantity of AMPS. The use of such emulsions simultaneously allows there to... Coatex