Thickening agent rheological modifier of the characteristics of the aqueous compositions loaded and / or pigmented, white or colorees

摘要

Water-soluble associative thickening copolymer in a neutral or alkaline medium for white or coloured, filled and/or pigmented aqueous compositions, composed:… a) of at least one ethylenically unsaturated monomer containing at least one carboxylic functional group,… b) of at least one other ethylenically unsaturated monomer devoid of carboxylic functional group,… c) of at least one surfactant monomer containing at least one urethane functional group resulting from the reaction of an ethylenically unsaturated isocyanate with a surfactant compound containing a hydroxyl functional group which is reactive towards the -NCO group, which is characterised in that the said copolymer belongs to the group consisting of those which, by definition, when placed in an aqueous solution with a solids content of 2% by weight and adjusted to a pH of 9 by adding aqueous ammonia and at a temperature of 20 DEG C, have a Brookfield viscosity not exceeding 220 centipoises at 100 revolutions per minute. …??The copolymer according to the invention applies to filled and/or pigmented aqueous compositions such as coating compositions and more particularly paints, coating sauces, printing pastes, leather finishing products, compositions for cosmetics and detergents and drilling fluids.