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1. (WO2018065558) LATEX PAINT CONTAINING TITANIUM DIOXIDE PIGMENT

Pub. No.:    WO/2018/065558    International Application No.:    PCT/EP2017/075433
Publication Date: Fri Apr 13 01:59:59 CEST 2018 International Filing Date: Sat Oct 07 01:59:59 CEST 2017
IPC: C09D 5/02
C08F 2/22
C08F 265/06
C09D 151/00
Applicants: BASF SE
Inventors: WILLERICH, Immanuel
BOYKO, Volodymyr
RECK, Bernd
MIKHAEL, Jules
LESWIN, Joost
THOMSON, Mary
RUECKEL, Markus
SCHEUBLE, Martin Robert
Title: LATEX PAINT CONTAINING TITANIUM DIOXIDE PIGMENT
Abstract:
The present invention relates to latex paints, which contain a) a multistage carboxylated polymer latex binder obtainable by multistage aqueous emulsion polymerisation of a monomer composition M consisting of at least one non-ionic monomer M1, which is selected from C1-C20-alkyl esters of acrylic acid, C1-C20-alkylesters of methacrylic acid, and vinyl aromatic monomers; one or more monoethylenically unsaturated monomers M2, which are selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and monoethylenically unsaturated dicarboxylic acids having 4 to 6 carbon atoms, and optionally one or more non-ionic monomers M3, which are different from monomers M1; where in at least one stage, the relative amount of monomers M2 added in this stage is at least 6% by weight, based on the total amount of monomers added in said stage, the total amount of monomers M2 being from 0.05 to 5% by weight, based on the total amount of the monomer composition M; b) a titanium dioxide pigment; and c) a polymeric dispersant PD which is selected from homo and copolymers of monomers M4, which are selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and monoethylenically unsaturated dicarboxylic acids having 4 to 6 carbon atoms, where the monomers M4 make up at least 85% of the monomers forming the polymeric dispersant and where the polymeric dispersant PD has a number average molecular weight, as determined by GPC, of at most 5500 Dalton.