The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
Mar. 22, 2021
Applicant:
Covestro (Netherlands) B.v., Geleen, NL;
Inventors:
Jurgen Scheerder, Buren, NL;
Remy Paul Marie Dollekens, Den Bosch, NL;
Assignee:
Covestro (Netherlands) B.V., Geleen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D 7/42 (2018.01); C09D 5/02 (2006.01); C09D 125/14 (2006.01);
U.S. Cl.
CPC ...
C09D 125/14 (2013.01); C09D 5/022 (2013.01); C09D 7/42 (2018.01);
Abstract
A process for preparing an aqueous polymer dispersion including free-radically initiated emulsion polymerization in an aqueous medium, in the presence of at least one vinyl polymer A, to obtain a polymer B including a vinyl polymer phase B1 with a glass transition temperature of from −20 to +15° C. and a vinyl polymer phase B2 with a glass transition temperature of from +50 to +110° C., with the proviso that the difference in glass transition temperature between polymer B1 and polymer B2 is at least 40° C. The weight ratio of polymer B1 to polymer B2 is from 80:10 to 10:20.