公开(公告)号：DE59905969D1

公开(公告)日：2003-07-24

申请号：DE59905969

申请日：1999-04-07

Applicant: BASF AG

Inventor： GERST MATTHIAS DR ,  AUCHTER GERHARD DR ,  ZETTL ALEXANDER

IPC: C09J7/02 ,  C08L33/08 ,  C09J133/08

公开(公告)号：DE19727060A1

公开(公告)日：1999-01-07

申请号：DE19727060

申请日：1997-06-25

Applicant: BASF AG

Inventor： GERST MATTHIAS DR ,  SCHULER BERNHARD DR ,  DAMES BURKHARDT DR ,  URBAN DIETER DR ,  WIESE HARM DR ,  MORRISON BRADLEY RONALD DR

IPC: C08F2/22 ,  C08F4/40 ,  C08F110/06 ,  C08F257/02 ,  C08F291/00 ,  C09K3/10 ,  C09D157/00 ,  D06M15/21 ,  C08J3/03 ,  C09J9/00 ,  C14C9/00

Abstract: Preparation of aqueous polymer dispersions of wt. average particle diameter above 400 nm comprises radically polymerising ethylenically unsaturated monomers in the presence of a surface active agent (emulsifier) and 0.001-1 wt.% seed polymer of monomodal particle size where, when 1% monomer conversion has been achieved, a redox initiator system is added, comprising an organic or inorganic (hydro)peroxide(s) and ascorbic acid, and polymerisation is undertaken in the presence of this system or another initiator system. Also claimed are the obtained aqueous dispersions comprising at least 60 wt.% polymer particles of dmax above 800 nm and half width h1/2 below 1/2 dmax, with the remainder being of diameter d below dmax.