| abstract |
The present invention relates to a process for producing a nonionic copolymer having a reactive terminal OH group by polymerizing monomers (A), (B), (C) and (D) and subsequently reacting the terminal OH group to form an anionic terminal group (A) is a monomer of the following formula (I), (B) is a monomer of the following formula (II), (C) is an ethylenically unsaturated (meth) acrylate containing an aromatic group (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, D is C 3 - alkylene, o is from 2 to 500. |