Patent ID: 8642697

Claim:
A process for preparing a randomly branched copolymer, wherein the components (a) 10-98.9 mol % of at least one acrylic ester of a linear, branched or cyclic C 1 -C 22 alkyl monoalcohol, (b) 0.1-10 mol % of at least one polyethylenically unsaturated monomer, and (c) optionally one or more monoethylenically unsaturated monomers which are different from acrylic esters of linear, branched or cyclic C 1 -C 22 alkyl monoalcohols and from compounds of the formula (I), in the presence of (d) 1-10 mol % of at least one compound of the formula (I) H 3 C—CR a R c —CH 2 —CR b ═CH 2 (I) where R a and R b independently of one another are aryl, CN or COOR 1 with R 1 ═H, alkyl, aryl or aralkyl and R c =alkyl, aryl or aralkyl, and in the presence of at least one initiator of free-radical polymerization, are reacted in a free-radical polymerization, the stated molar fractions of components (a), (b), (c), and (d) adding up to 100 mol % and the molar fraction of component, (b) not exceeding the molar fraction of component (d).