Polyetheramines with polymers of .alpha., .beta.-unsaturated dicarboxylic acids

A reaction product of a polyetheramine with a polymer comprising dicarboxylic acid anhydride groups, which contains 20-80 mol % of bivalent structural units A or C or a mixture of A and C and, optionally, structural units B ##STR10## in which R.sup.1 and R.sup.2, independently of one another, are hydrogen or methyl,

• a and b are equal to zero or one and a+b is equal to one,
• Y is X or NRR.sup.3
• X is --OH, --O--(C.sub.1 -C.sub.30 -alkyl), NR.sup.3 R.sup.4 or --O.sup..crclbar. N.sup..sym. R.sup.3 R.sup.4,
• R.sup.3 and R.sup.4, independently of one another, are hydrogen, C.sub.6 -C.sub.40 -alkyl or R,
• R is ##STR11## with the proviso that at at least 1 mol % of the anhydride groups bonded to the polymer have react with a polyetheramine of the formula (H) ##STR12## in which R.sup.3 is hydrogen, C.sub.6 -C.sub.40 -alkyl or R,
• R is a group of the formula
• --Z--(O--CH--CH.sub.2).sub.n O--R.sup.5
• R.sup.6
• Z is C.sub.2 -C.sub.4 -alkyl,
• n is a number from 1 to 1000,
• R.sup.5 is C.sub.1 -C.sub.30 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl or C.sub.8 -C.sub.30 -aryl and
• R.sup.6 is hydrogen or C.sub.1 -C.sub.4 -alkyl,
• Z is C.sub.2 -C.sub.4 -alkyl,
• n is a number from 1 to 1000,
• R.sup.5 is C.sub.1 -C.sub.30 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl or C.sub.6 -C.sub.30 -aryl and
• R.sup.6 is hydrogen or C.sub.1 -C.sub.4 -alkyl, and
• 8- 20mol % of bivalent structural units D ##STR13## in which R.sup.7 is hydrogen or C.sub.1 -C.sub.4 -alkyl and
• R.sup.8 is C.sub.1 -C.sub.60 -alkyl or C.sub.6 -C.sub.18 -aryl.