Patent ID: 8461232

Claim:
Polymer composition containing 3 to 90% by weight of a copolymer H and 3 to 90% by weight of a copolymer K, the copolymers H and K each having polyether macromonomer structural units and acid monomer structural units, which are present in the copolymers H and K in each case in a molar ratio of 1:20 to 1:1, and at least 20 mol % of all structural units of the copolymer H and at least 25 mol % of all structural units of the copolymer K being present in each case in the form of acid monomer structural units, at least 60 mol % of the polyether macromonomer structural units of the copolymer H being represented by the isoprenol polyether derivative structural unit α of the general formula (Ia) where A are identical or different and are represented by an alkylene group according to C x H 2x where x=2, 3, 4 or 5, and a are identical or different and are represented by an integer between 4 and 300, at least 60 mol % of the polyether macromonomer structural units of the copolymer K being represented by the vinyloxy polyether derivative structural unit β of the general formula (Ib) where R A are identical or different and are represented by a hydrogen atom, a linear C 1 -C 12 alkyl group or branched C 3 -C 12 alkyl group, C 5 -C 8 cycloalkyl group, phenyl group or C 7 -C 12 arylalkyl group, A are identical or different and are represented by an alkylene group according to C x H 2x where x =2, 3, 4 or 5, and b are identical or different and are represented by an integer from 6 to 450, the arithmetic mean of the alkylene groups A of the structural units which belong to the vinyloxy polyether derivative structural unit β being higher by at least the factor 1.5 than the arithmetic mean of the alkylene groups A of the structural units which belong to the isoprenol polyether derivative structural unit α.