公开(公告)号：US20210292457A1

公开(公告)日：2021-09-23

申请号：US16321493

申请日：2017-07-28

Applicant: BASF SE

Inventor： Sebastian ENCK ,  Peter NESVADBA ,  Christoph TONHAUSER ,  Tobias Reinhard UMBACH ,  Meik RANFT ,  Helmut STEININGER ,  Jens HARTIG

IPC: C08F222/38 ,  C09D133/14 ,  C08F222/10 ,  C08F216/12 ,  C08J3/12 ,  C09J133/24 ,  C09J133/14

Abstract: The invention relates to aqueous polymer dispersions, comprising a water insoluble polymer P in the form of dispersed polymer particles, which is obtainable by free radical aqueous emulsion polymerization of ethylenically unsaturated monomers M, which comprise a) at least one monomer M1 which exhibits two ethylenically unsaturated moieties which are connected by a linker which comprises a disulfide moiety, and b) at least one monoethylenically unsaturated monomer M2, which has a low water solubility. The invention also relates to processes for preparing such an aqueous polymer dispersion, to solid polymer compositions in powder form, obtainable by drying such polymer dispersions, to the use of such polymer dispersions in a coating material, adhesive or sealant and to a methods of coating a surface of a substrate which comprises applying an aqueous coating composition, which contains such an polymer dispersion.

公开(公告)号：US20210009734A1

公开(公告)日：2021-01-14

申请号：US16980732

申请日：2019-03-13

Applicant: BASF SE

Inventor： Wolfgang GASCHLER ,  Sebastian ENCK

IPC: C08F220/14 ,  C08F2/22 ,  C09D133/12 ,  C08K11/00

Abstract: A process for preparing an aqueous polymer dispersion, the process including forming a copolymer A from at least one α,β-monoethylenically unsaturated C3 to C6 monocarboxylic acid (monomers A1) and at least one other monoethylenically unsaturated compound (monomers A2); reacting the copolymer A with a metal compound M in an aqueous medium; and conducting free-radical polymerization of at least one ethylenically unsaturated compound (monomer P) in the presence of the copolymer A in an aqueous medium.

公开(公告)号：US20190263941A1

公开(公告)日：2019-08-29

申请号：US16318863

申请日：2017-07-06

Applicant: BASF SE

Inventor： Wolfgang GASCHLER ,  Sebastian ENCK ,  Leendert BERKHOUT ,  Linda GUITMAN ,  Juergen KACZUN ,  David HAJNAL

IPC: C08F2/22 ,  C08K3/22 ,  C09D5/02 ,  C08K3/013 ,  C08F212/08 ,  C08F220/18

Abstract: A process for producing aqueous polymer dispersions and the use thereof as binder for coatings having high solvent stability and a low tendency to soiling.

公开(公告)号：US20190144585A1

公开(公告)日：2019-05-16

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

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).