| abstract |
The present invention relates to a copolymer obtainable by polymerizing monomers (A), (B), (C) and (D), wherein (A) (C) is an ethylenically unsaturated monomer containing an aromatic group, and (D) is an ethylenically unsaturated monomer containing an alkyl radical. (I) ≪ RTI ID = 0.0 & In this formula, A is C 2 -C 4 -alkylene, B is C 2 -C 4 -alkylene which is not A, R is hydrogen or methyl, m is from 1 to 500, n is from 1 to 500, the sum of m + n is 2 to 1000, D is C 3 - alkylene, o is from 2 to 500. |