公开(公告)号：US11118083B2

公开(公告)日：2021-09-14

申请号：US16336565

申请日：2017-10-06

Applicant: BASF SE

Inventor： Immanuel Willerich ,  Volodymyr Boyko ,  Bernd Reck ,  Jules Mikhael ,  Joost Leswin ,  Matthias Maier ,  Tanja Rost ,  Markus Rueckel

IPC: C09D151/00 ,  C09D5/02 ,  C08K3/22

Abstract: The present invention relates to latex paints containing a) a multistage carboxylated polymer latex binder obtainable by multistage aqueous emulsion polymerisation of at least one non-ionic monomer 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 where in at least one stage, monomers M2 added in this stage is at least 6% by weight; b) a titanium dioxide pigment; c) a polymeric dispersant 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 make up at least 85% of the monomers forming the polymeric dispersant; and d) a thickener polymer.

公开(公告)号：US11155663B2

公开(公告)日：2021-10-26

申请号：US16098010

申请日：2017-05-03

Applicant: BASF SE

Inventor： Tanja Rost ,  Roelof Balk ,  Immanuel Willerich ,  Sebastian Enck ,  Joost Leswin ,  Wolfgang Gaschler ,  Martin Robert Scheuble

IPC: C08F220/14 ,  C08F212/08 ,  C09D133/02 ,  C09D133/08 ,  C08F220/18 ,  C09D133/12 ,  C08F2/22 ,  C08F220/06 ,  C08K3/22

Abstract: Disclosed herein is a process for preparing an aqueous polymer latex by polymerising a monomer composition M by a radical emulsion polymerisation, where at least 95% of the monomer composition M is metered during a period P to the polymerisation reaction under polymerisation conditions, such that during at least one period P(n) within the period P, the relative amount of monomers M2, which are metered to the polymerisation reaction during the periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction during said period P(n), is at least 1% by weight higher than the relative amount of monomers M2, which are metered to the polymerisation reaction outside of each of said periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction outside of each of said periods P(n).