公开(公告)号：ID21083A

公开(公告)日：1999-04-15

申请号：ID990068

申请日：1997-09-05

Applicant: BASF AG

Inventor： CHENG-LI ZHAO ,  JOACHIM ROSER ,  ECKEHARDT WISTUBA

IPC: C08L51/06 ,  C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F2/44 ,  C08F265/00 ,  C08F265/06 ,  C08F285/00 ,  C08F291/00 ,  C09D151/00 ,  C09J151/00 ,  D21H19/58

Abstract: A process for preparing aqueous polymer dispersions comprises first of all subjecting ethylenically unsaturated monomers to free-radical aqueous emulsion polymerization to prepare an aqueous dispersion of a polymer 1 having a glass transition temperature Tg1, then dissolving further, comparatively hard monomers in the dispersed particles of the polymer 1, and subsequently carrying out free-radical polymerization of the monomers dissolved in the particles.

公开(公告)号：SG95580A1

公开(公告)日：2003-04-23

申请号：SG1996011120

申请日：1996-11-12

Applicant: BASF AG

Inventor： ANDREE DRAGON ,  ECKEHARDT WISTUBA ,  JURGEN SCHMIDT-THUMMES ,  THOMAS ANSELMANN

IPC: C08K3/28 ,  C08F2/22 ,  C08F212/00 ,  C08F212/06 ,  C08F212/08 ,  C08F236/10 ,  C08K3/00 ,  C08K5/17 ,  C08L25/00 ,  C08L25/02 ,  C09D5/00 ,  C09D109/06 ,  C09D109/08 ,  C09D125/00 ,  C09D125/02 ,  C09D125/10 ,  C08F236/04 ,  C08F212/02

Abstract: Aqueous polymer dispersions (I), containing a radical copolymer (CP) with an alkali metal ion content (GA) of not more than 0.5 wt.%, based on (A) 20-65 wt.% vinylaromatic monomer(s), (B) 35-80 wt.% comonomer(s) with two conjugated double bonds and (C) 0-10 wt.% other comonomers with at least one double bond. Also claimed are (i) aqueous polymer preparations containing (I) and finely divided pigment in amounts of up to 60 vol.% (IIA) or 20-45 vol.% (IIB); (ii) substrates coated with a film of (I) or (II), and (iii) a process for the production of (I) by radical- initiated aqueous emulsion polymerisation of the above comonomers, with the addition of ammonia and/or organic amine to increase the pH of the dispersion medium.