公开(公告)号：US20230049303A1

公开(公告)日：2023-02-16

申请号：US17881652

申请日：2022-08-05

Applicant: BASF SE

Inventor： Christian JEHN-RENDU ,  Silke BOERNER ,  Steffen GEIGER

IPC: C09D5/02 ,  C09D125/14 ,  C09D7/61

Abstract: The invention relates to a coating slip comprising (i) an aqueous dispersion of one or more vinyl acetate polymers, obtainable by free-radically initiated emulsion polymerization of 77% to 99% by weight of vinyl acetate, 1% to 13% by weight of ethylene and 0% to 10% by weight of one or more monoethylenically unsaturated monomers that are neither vinyl acetate nor ethylene, where the amounts of the monomers add up to 100% by weight, (ii) an aqueous dispersion of one or more styrene copolymers, obtainable by free-radically initiated emulsion polymerization of a monomer composition comprising 35% to 70% by weight of styrene, 20% to 60% by weight of one or more esters of acrylic and/or methacrylic acid with alkanols having 1 to 12 carbon atoms, or of one or more conjugated aliphatic dienes, 1% to 10% by weight of one or more monomers comprising acid groups, where the amounts of the monomers add up to 100% by weight, (iii) inorganic pigments and (iv) optionally further auxiliaries, where the total amount of emulsion polymers (i) and (ii) is 10 to 30 parts by weight based on 100 parts by weight of inorganic pigment (iii) and where the weight ratio of the styrene copolymer to the vinyl acetate polymer is 77:23 to 93:7, and to a method of producing the coating slip, to the use thereof for coating board, to a method of coating board with the coating slip and to the board coated thereby.