| abstract |
The invention consists in the use, as thickening agent of an aqueous formulation, especially a salt-rich, of a water-soluble or alkali-soluble copolymer consisting of (by weight): a) 30% to 45% of acid (meth) ) acrylic, b) 50% to 60% acrylamide and / or N-methylol and / or acrylic ester, c) 2% to 10% of a hydrophobic monomer of formula R1 - (R2O) m - R3, wherein: - R1 denotes a polymerizable unsaturated functional group, - R2O denotes an alkylene oxide group having from 1 to 6 carbon atoms, - m is an integer of between 20 and 50, - R3 denotes a linear alkyl chain comprising at least 16 and at most 26 carbon atoms, d) 0.1% to 4% of at least one crosslinking agent which is preferably ethylene glycol dimethacrylate (EDMA). |