| abstract |
The invention provides graft copolymers obtainable by grafting an ester (a) of a C 8 - to C 22 -alcohol and acrylic acid onto a copolymer (b) containing, in addition to ethylene, from 0.5 to 16 mol % of at least one vinyl ester of the formula 1n nCH 2 ═CH—OCOR 1 (1)n nwhere R 1 is a branched C 5 - to C 15 -alkyl radical, with the proviso that the copolymer b) contains less than 3.5 mol % of vinyl acetate. |