公开(公告)号：US10913811B2

公开(公告)日：2021-02-09

申请号：US16085807

申请日：2017-03-14

Applicant: BASF SE

Inventor： Roelof Balk ,  Bastiaan Lohmeijer ,  Robert Wrazidlo

IPC: C08F265/06 ,  C09D151/00 ,  C09D7/65 ,  C08F2/22 ,  C08F2/38 ,  C08K5/07 ,  C09D5/02 ,  C08F220/18 ,  C08F212/08 ,  C08F220/14 ,  C08L79/02

Abstract: The present invention provides very finely divided polymer dispersions obtainable by at least one two-stage emulsion polymerization, wherein 1) an acid-rich first polymer P1 is prepared by a radical polymerization from a 1st composition comprising A) at least one monomer selected from the group of (cyclo)alkyl (meth)acrylates, vinylaromatics having up to 20 carbon atoms, a radically polymerizable compound selected from the group of ethylenically unsaturated nitriles having up to 20 carbon atoms, vinyl esters of carboxylic acids containing up to 20 carbon atoms, vinyl halides having up to 10 carbon atoms, and vinyl ethers of alcohols containing 1 to 10 carbon atoms B) at least one α,β-ethylenically unsaturated carboxylic acid C) at least one crosslinking monomer with a keto or aldehyde group D) optionally at least one adhesion promoter E) optionally tert-butyl acrylate F) optionally further monomers M in the presence of a chain link transfer agent, 2) the polymer P1 prepared under 1) is admixed with a base, 3) a hydrophobic polymer P2 is prepared by radical polymerization, in the presence of the polymer P1 treated under 2), from a 2nd composition comprising A) at least one monomer selected from the group of (cyclo)alkyl (meth)acrylates, vinylaromatics having up to 20 carbon atoms, a radically polymerizable compound selected from the group of ethylenically unsaturated nitriles having up to 20 carbon atoms, vinyl esters of carboxylic acids containing up to 20 carbon atoms, vinyl halides having up to 10 carbon atoms, and vinyl ethers of alcohols containing 1 to 10 carbon atoms B) optionally at least one α,β-ethylenically unsaturated carboxylic acid C) at least one crosslinking monomer with a keto or aldehyde group D) optionally at least one adhesion promoter, and also E) optionally further monomers M, 4) and by optional addition, subsequent to the polymerization of P1 and P2, of a water-soluble at least trifunctional alkoxylated polyamine, more particularly an ethoxylated and/or propoxylated triamine.

公开(公告)号：US12173174B2

公开(公告)日：2024-12-24

申请号：US17265224

申请日：2019-07-22

Applicant: BASF SE

Inventor： Bastiaan Lohmeijer ,  Roelof Balk ,  Robert Wrazidlo

IPC: C08F2/22 ,  C09D5/02 ,  C09D5/22 ,  C09D125/14 ,  C09D133/12

Abstract: The present invention relates to a process for producing an aqueous polymer dispersion of polymerized ethylenically unsaturated monomers M having a polymer content of at least 55 wt. % and a polymodal particle size distribution of the polymer particles of the polymer dispersion. The invention also relates to aqueous polymer dispersions obtained from this process as well as aqueous liquid compositions comprising at least one aqueous polymer dispersion and the use of such aqueous liquid compositions as binder.