公开(公告)号：DE19952671A1

公开(公告)日：2001-05-03

申请号：DE19952671

申请日：1999-11-02

Applicant: BASF AG

Inventor： PAKUSCH JOACHIM ,  DITTRICH UWE ,  ROECKEL HARALD ,  SMITH ALAN ,  GULBINS ERICH ,  ZHUO LI

IPC: C08F2/22 ,  C08F212/04 ,  C08F220/18 ,  C08F265/06 ,  C08F212/00 ,  C08L33/04

Abstract: Emulsion polymers with domains (1) and (2) with glass transition points of -10 to +40 deg C and +50 to 120 deg C respectively, based on acrylic, vinylaromatic (V-Ar) and other monomers, in which (1) and/or (2) contains a nitrogen-containing coupling monomer, (1) contains at least 10 wt.% V-Ar and/or (2) contains at least 15 wt.% V-Ar and/or alkyl methacrylate. Multi-stage emulsion polymers (I) comprising (1) domain(s) with a glass transition point (Tg) of -10 to +40 deg C and (2) domain(s) with a Tg of +50 to 120 deg C in a wt. ratio of (1):(2) = (90:10)-(50:50), in which (1) contains polymerized units of (1a) 5-60 wt.% methyl and/or ethyl methacrylate (MMA/EMA), (1b) 20-80 wt.% 4-12C alkyl acrylate (Alk-A), (1c) up to 50 wt% vinylaromatics (V-Ar), (1d) 0.1-5 wt.% unsaturated carboxylic acid (USAc), (1e) up to 5 wt.% unsaturated amide (USAm) and (1f) up to 10 wt.% other unsaturated monomers (UM) and (2) contains units of (2a) up to 99.9 wt.% MMA and/or EMA, (2b) up to 99.9 wt.% V-Ar and/or 4-12C alkyl methacrylate (Alk-MA), (2c) 0.1-5 wt% USAc, (2d) up to 10 wt.% USAm and (2e) up to 10 wt.% UM. Domain(s) (1) and/or (2) also contain(s) 0.1-10 wt.% nitrogen-containing, adhesion-promoting monomer (N-A-M), while (1) contains at least 10 wt% V-Ar and/or (2) contains at least 15 wt.% V-Ar and/or Alk-MA. An Independent claim is also included for water-based paint containing (I) and pigment(s).