	US 11,912,901 B1
	Polymer latex for matte films
Gamini S. Samaranayake, Cleveland, OH (US); Shailesh S. Shah, Cleveland, OH (US); Joseph J. Kestner, Cleveland, OH (US); Kimberly A. Koglin, Cleveland, OH (US); Tom Wendland, Cleveland, OH (US); and Margaret Patterson, Cleveland, OH (US)
Assigned to SWIMC LLC, Cleveland, OH (US)
Filed by SWIMC LLC, Cleveland, OH (US)
Filed on Dec. 29, 2021, as Appl. No. 17/564,561.
Claims priority of provisional application 63/133,963, filed on Jan. 5, 2021.
Int. Cl. C09D 7/42 (2018.01); B01J 13/14 (2006.01); C09D 7/40 (2018.01); C09D 7/65 (2018.01); C09D 133/04 (2006.01)

CPC C09D 7/42 (2018.01) [B01J 13/14 (2013.01); C09D 7/65 (2018.01); C09D 7/69 (2018.01); C09D 7/70 (2018.01); C09D 133/04 (2013.01)]

12 Claims

1. A waterborne coating composition for producing a matte film, the waterborne coating composition comprising:

a primary binder latex;

organic particles having an average diameter of about 10 to about 50 microns and including a polymeric core and polymeric shell, wherein the polymeric core has a glass transition temperature (Tg) of 80° C. or higher and the polymeric shell has a glass transition temperature (Tg) of 30° C. or less;

a pigment volume concentration (PVC) of about 28 or less; and

the waterborne coating composition, when dried as the matte film, exhibits a 60-degree gloss value of 5 or less and a 85-degree sheen value of 10 or less and with the polymeric shell combining with the primary binder latex to coalesce as the matte film and the polymeric core remaining as a particle within the dried matte film.