公开(公告)号：US20210269653A1

公开(公告)日：2021-09-02

申请号：US17256431

申请日：2019-06-19

Applicant: BASF SE

Inventor： Martin Robert SCHEUBLE ,  Ivan CABRERA ,  Immanuel WILLERICH ,  Crispin AMIRI NAINI ,  Nicolas TISSIER ,  Joerg Alexander DIMMER ,  Tanja ROST

IPC: C09D5/02 ,  C09D7/61 ,  C08F212/08 ,  C08F220/06 ,  C08F220/18 ,  C08F230/08 ,  C08F2/22 ,  C08K3/013 ,  C08K3/34 ,  C08L33/08

Abstract: The present invention relates to an aqueous emulsion paint comprising a) 5% to 50% by weight of an aqueous polymer dispersion having a solids content in the range from 40% to 60% by weight, obtainable by the free-radical aqueous emulsion polymerization of a monomer mixture comprising ethylhexyl acrylate, butyl acrylate and one or more vinylaromatics, preferably styrene, b) 0.1% to 5% by weight of alkali metal alkylsiliconate and/or water-soluble silicate, c) 20% to 70% by weight of inorganic fillers, d) 0% to 30% by weight of at least one pigment, e) 0.1% to 10% by weight of customary auxiliaries, and f) water, based in each case on the total amount of the emulsion paint, the pH of the emulsion paint having a value in the range from 10 to 12, and also relates to the aqueous polymer dispersions, to a process for the preparation thereof and to the use thereof as organic binders in emulsion paints having a high pH.

公开(公告)号：US20240425628A1

公开(公告)日：2024-12-26

申请号：US18274038

申请日：2022-01-26

Applicant: BASF SE

Inventor： Martin Robert SCHEUBLE ,  Ivan CABRERA ,  Joerg Alexander DIMMER ,  Immanuel WILLERICH

IPC: C08F212/08 ,  C08F2/26 ,  C08K3/22 ,  C08K3/26 ,  C08K3/34 ,  C09D7/61 ,  C09D125/14

Abstract: The present invention relates to aqueous polymer latexes of film-forming copolymer particles obtainable by aqueous emulsion polymerisation of monoethylenically monomers M, which mainly comprise non-ionic monomers of the group consisting of alkyl(meth)acrylates, cycloalkyl(meth)acrylates and monovinylaromatic hydrocarbon monomers and which additionally comprise 0.01 to 1% by weight, based on the total weight of monomers M, of at least one monoethylenically unsaturated monomer M2 having a hydrolysable silane group; and 0.1 to 2% by weight, based on the total weight of monomers M, of at least one monoethylenically unsaturated monomer M3 having an acidic phosphate group, or a salt thereof and where the copolymer particles in the polymer latex have volume median particle diameter of at least 250 nm, as determined by dynamic light scattering according to the ISO 13321:1996 standard. The polymer latexes are particularly suitable as binders in coating compositions having high pigment volume concentration (PVC) of preferably above 60% and provide good wet scrub resistance and opacity to coatings obtained therefrom. The present invention also relates to a process for producing such polymer latexes, to waterborne coating compositions containing these latexes and to the use of said polymer latexes for improving the wet scrub resistance and the opacity of coating compositions having a pigment volume concentration (PVC) of preferably above 60%.

公开(公告)号：US20230348633A1

公开(公告)日：2023-11-02

申请号：US17629816

申请日：2020-07-24

Applicant: BASF SE

Inventor： Xavier MOLLAT DU JOURDIN ,  Joost LESWIN ,  Michaela REINSCH ,  Nicole SPECHT ,  Janine EINHORN-RECH ,  Joerg Alexander DIMMER ,  Rainer PACHE ,  Jochen GATTERMAYER ,  Hans-Juergen DENU

IPC: C08F2/22 ,  C08F2/00 ,  C08F2/38 ,  C08F220/18 ,  C08F220/06 ,  C08F220/14 ,  C08K5/37 ,  C08K5/14 ,  C09D133/12

CPC classification number: C08F2/22 ,  C08F2/001 ,  C08F2/38 ,  C08F220/1804 ,  C08F220/06 ,  C08F220/14 ,  C08K5/37 ,  C08K5/14 ,  C09D133/12 ,  C08F2800/20

Abstract: The present application relates to a process for producing an aqueous polymer dispersion of polymerized ethylenically unsaturated monomers M by a multistage aqueous radical emulsion polymerization comprising a first aqueous radical emulsion polymerization step of a first monomer composition M.a and subsequently a further aqueous radical emulsion polymerization step of a second monomer composition M.b. The present application also relates to aqueous polymer dispersions obtainable by such a process and to the use thereof, in particular as a binder in coating compositions. The process comprises a multistage aqueous radical emulsion polymerization of ethylenically unsaturated monomers M, comprising a) at least one non-ionic, monoethylenically unsaturated monomer M1 having a solubility in deionized water of at most 60 g/L at 25° C. and 1 bar, b) at least one monoethylenically unsaturated monomer M2 selected from monomers having an acid group and their salts, and c) optionally one or more ethylenically unsaturated monomers M3, which are different from the monomers M1 and M2, where the process comprises i) a first step of an aqueous radical emulsion polymerization of a first monomer composition M.a consisting of monomers M1, M2 and optionally M3, to obtain a first aqueous polymer dispersion, where the monomer composition M.a comprises at most 2% by weight, in particular at most 1.5% by weight and especially at most 1.5% by weight or at most 1.0% by weight, based on the total weight of the monomers of the monomer composition M.a, of monomers M2, and subsequently ii) at least one further aqueous radical emulsion polymerization step of a second monomer composition M.b consisting of monomers M1, M2 and optionally M3, where the second step is performed in the aqueous polymer dispersion of the first step and in the presence of a chain transfer agent T, where the monomer composition M.b comprises 2 to 20% by weight, in particular from 5 to 18% by weight and especially from 8 to 16% by weight, based on the total weight of the monomers of the monomer composition M.b, of at least one monomer M2, where the weight ratio of the total weight of monomers of monomer composition M.a to the total weight of monomers of monomer composition M.b is in the range from 10:90 to 90:10, in particular in the range from 50:50 to 87:13, especially in the range from 60:40 to 85:15.