| abstract |
A process for preparing a randomly branched copolymer, comprising: (a) at least 10-98.9 mole% of acrylic acid esters of linear, branched or cyclic C 1 -C 22 alkyl monoalcohols, and (b) at least one polyethyleneic unsaturated At least one monoethylenic, different from 0.1-10 mol% monomer and (c) at least one acrylic ester of optionally linear, branched or cyclic C 1 -C 22 alkyl monoalcohol and also different from the compound of formula (I) (D) H 3 C-CR a R c -CH 2 -CR b = CH 2 (I), in the presence of (d) 1-10 mol% of at least one compound of formula (I) a and R b are each independently aryl, CN or COOR 1 as R 1 = H, alkyl, aryl or aralkyl and R c = alkyl, aryl or aralkyl), and the presence of at least one free-radical polymerization initiator Under free-radical polymerization, and the molar ratios of components (a), (b), (c) and (d) are up to 100 mol%. Is, the molar ratio of component (b) is produced wherein not greater than the molar proportion of the component (d). Its use as a leveling agent in copolymers and coatings obtainable by the process. |