公开(公告)号：DE19632202A1

公开(公告)日：1998-02-12

申请号：DE19632202

申请日：1996-08-09

Applicant: BASF AG

Inventor： SCHULER BERNHARD DR ,  AUCHTER GERHARD DR ,  TUERK JOHANNES ,  NOORDIJK RIK ,  DOBELAAR JOHANNES DR ,  BAECHER REINHARD DR ,  HUEMMER WOLFGANG DR

IPC: C08F220/12 ,  C09J7/04 ,  C09J133/06 ,  C08F220/18 ,  C09J133/08 ,  C09J133/10 ,  C09J125/04 ,  G09F3/04

Abstract: Polymerizate comprised of a total of a) 50 - 99.98 wt.% of a C1-C12 alkyl(meth)acrylate, b) 0.02 - 10 wt.% of a vinyl aromatic compound, c) 0 - 10 wt.% of an ethylenically unsaturated acid or an ethylenically unsaturated acid anhydride and d) 0 - 40 wt.% of further monomers, wherein the percentage by weight is related to the polymerizate and the polymerizate is obtained by the polymerization of the monomers a) to d) in at least two steps, in which their vinyl aromatic content differs in such a way that the vinyl aromatic content in the step which is rich in vinyl aromatics is at least five times higher than the step which is poor in vinyl aromatics.