公开(公告)号：DE50204841D1

公开(公告)日：2005-12-15

申请号：DE50204841

申请日：2002-10-17

Applicant: BASF AG

Inventor： KOPPERS DR ,  SCHMIDT MARCO ,  ANSELMANN THOMAS ,  SCHMIDT-THUEMMES DR ,  ZOTT MIKE ,  WISTUBA DR

IPC: C08K3/10 ,  C08F212/04 ,  C08F220/00 ,  C08F236/04 ,  C08F236/10 ,  C08L25/10 ,  C09D125/08 ,  C08F212/08 ,  C09D109/08 ,  C09D125/10

Abstract: An aqueous polymer dispersion with a polymerisate in disperse distribution in a radically polymerized form is synthesized from at least one vinyl aromatic monomer A; a doubly conjugated ethylenically unsaturated monomer B; and a monomer C selected from alpha, beta-monoethylenically unsaturated mono- and dicarboxylic acids or their amide or ester derivatives. An aqueous polymer dispersion with a polymerisate in disperse distribution in a radically polymerized form synthesized from (wt.%): at east one vinyl aromatic monomer (monomer A)(20-65); at least one doubly conjugated ethylenically unsaturated double bonded monomer (monomer B)(30-75); and at least one other monomer (monomer C)(0.5-10) selected from alpha,beta-monoethylenically unsaturated mono- and dicarboxylic acids or their amide or ester derivatives, and their content GA of alkali metal ion, relative to the weight of dispersed polymerisate is ≥ 0.5 wt.% , where the pH of the aqueous dispersion medium is set at a value lower than 6 is new. An Independent claim is included for preparation of the aqueous polymer dispersion by radical emulsion polymerization of the starting monomers A, B, and C in the required ratios for production of the polymer, with setting of the pH of the aqueous dispersion medium at below 6 by addition of a specific amount of aqueous alkali metal hydroxide solution.