Co-polymers based on oxyalkyleneglycol alkenyl ethers and unsaturated dicarboxylic acid derivatives

A co-polymers based on oxyalkyleneglycol-alkenyl ethers and unsaturated dicarboxylic acid derivatives, comprising

• a) 10 to 90 mol % of component of the formula:
• Ia and/or Ib:
• ##STR20## in which M is a hydrogen atom, a mono- or divalent metal cation, an ammonium ion or an organic amine residue, a is 1 or, when M is a divalent metal cation, is 1/2, X is also --OM.sub.a or --O--(C.sub.m H.sub.2m O).sub.n --R.sup.1, in which R.sup.1 is a hydrogen atom, an aliphatic hydrocarbon radical containing from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon radical containing 5 to 8 carbon atoms or an optionally substituted aryl radical containing 6 to 14 carbon atoms, m is 2 to 4, n is 0 to 100, --NHR.sup.2 and/or --NHR.sup.2.sub.2, in which R.sup.2 =R.sup.1 or --CO--NH.sub.2, as well as Y is an oxygen atom or --NR.sup.2,
• b) 1 to 89 mol % of components of the general formula:
• ##STR21## in which R.sup.3 is a hydrogen atom or an aliphatic hydrocarbon radical containing from 1 to 5 carbon atoms, p is 0 to 3 and R.sup.1, m and n have the above-given meanings, as well as
• c) 0.1 to 10 mol % of components of the general formulae:
• ##STR22## in which S is a hydrogen atom or --COOM.sub.a or --COOR.sup.5, T is a radical of the general formula:
• ##STR23## --(CH.sub.2).sub.z --V--(CH.sub.2).sub.z --CH.dbd.CH--R.sup.1 or --COOR.sup.5 or, when S is --COOR.sup.5 or --COOM.sub.a, U.sup.1 is --CO--NHM--, --O-- or --CH.sub.2 O, U.sup.2 is --NH--CO--, --O-- or --OCH.sub.2, V is --O--CO--CE.sub.6 H.sub.4 --CO--O-- or --W-- and W is ##STR24## R.sup.4 is a hydrogen atom or a methyl radical, R.sup.5 is an aliphatic hydrocarbon radical containing 3 to 20 carbon atoms, a cycloaliphatic hydrocarbon radical containing 5 to 8 carbon atoms or an aryl radical containing 6 to 14 carbon atoms, R.sup.6 =R.sup.1. ##STR25## r is 2 to 100, s is 1 or 2, x is 1 to 150, y is 0 to 15 and z is 0 to 4.