Associative thickener dispersion

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/06 (2006.01) C08F 220/10 (2006.01) C08F 220/18 (2006.01) C09D 7/00 (2006.01)

Patent

CA 2694212

An aqueous dispersion of a copolymer with copolymerized units a) of at least one ethylenically unsaturated carboxylic acid, b) of at least one nonionic ethylenically unsaturated surfactant monomer, c) of at least one C1-C2-alkyl methacrylate, d) of at least one C2-C4-alkyl acrylate, where the alkyl chain length averaged over the number of alkyl groups of the alkyl acrylate is 2.1 to 4.0, is described. Following neutralization with alkali, the dispersion serves as associative thickener, in particular for liquid detergent and cleaner formulations. The thickeners are characterized by high transparency and high thickening effect coupled with high shear dilution.

L'invention concerne une dispersion aqueuse d'un copolymère comportant les unités polymérisées a) au moins un acide carboxylique éthyléniquement insaturé, b) au moins un monomère tensioactif non ionique éthyléniquement insaturé, c) au moins un méthacrylate d'alkyle en C1-C2, d) au moins un acrylate d'alkyle en C2-C4, la longueur des chaînes alkyles moyennée par le nombre de groupes alkyles de l'acrylate d'alkyle étant de 2,1 à 4,0. Après neutralisation avec des alcalis, la dispersion est utilisée en tant qu'épaississant associatif, notamment pour des formulations liquides d'agents de lavage ou de nettoyage. L'épaississant se distingue par une grande transparence et une grande action d'épaississement avec en même temps une grande fluidification par cisaillement.

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