Polyether-containing copolymer

A copolymer consisting essentially of two monomer components, wherein component

• a) is an olefinic unsaturated monocarboxylic acid comonomer or an ester or a salt thereof or an olefinic unsaturated sulfuric acid comonomer or a salt thereof, and component b) is a comonomer of formula (I)
• wherein R1 is
• and wherein R2 is H or an aliphatic hydrocarbon group having from 1 to 5 carbon atoms, R3 is a non-substituted or substituted aryl group, and R4 is H or an aliphatic hydrocarbon group having from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon group having from 5 to 8 carbon atoms, a substituted aryl group having from 6 to 14 carbon atoms or a compound selected from the group
• wherein R5 and R7 may each be an alkyl, aryl, aralkyl or alkaryl group and R6 may be an alkyliden, aryliden, aralkyliden or alkaryliden group and p 0 to 3, m, n=2 to 4, x and y are independently and integer from 55 to 350, and z is from 1 to 200.

A copolymer consisting of two monomer components, wherein component

• a) is an olefinic unsaturated monocarboxylic acid comonomer or an ester or a salt thereof or an olefinic unsaturated sulfuric acid comonomer or a salt thereof, and component b) is a comonomer of formula (I)
• wherein R1 is
• and wherein R2 is H or an aliphatic hydrocarbon group having from 1 to 5 carbon atoms, R3 is a non-substituted or substituted aryl group, and R4 is H or an aliphatic hydrocarbon group having from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon group having from 5 to 8 carbon atoms, a substituted aryl group having from 6 to 14 carbon atoms or a compound selected from the group
• wherein R5 and R7 may each be an alkyl, aryl, aralkyl or alkaryl group and R6 may be an alkyliden, aryliden, aralkyliden or alkaryliden group and p=0 to 3, m, n=2 to 4, x and y are independently and integer from 55 to 350, and z is from 1 to 200.