abstract |
The invention relates to copolymers of (a) from 5 to 40% by weight of isoprenol, (b) from 5 to 93% by weight of at least one monoethylenically unsaturated C 3 to C 8 monocarboxylic acid, or of an anhydride or salt of same, (c) from 2 to 90% by weight of one or more monomers containing sulphonic acid groups. |