	US 11,718,762 B2
	Impact resistant coating compositions
Troy James Larimer, North Huntington, PA (US); John Robert Schneider, Sharpsburg, PA (US); Amy Liane Toolis, Natrona Heights, PA (US); and Anthony Michael Chasser, Allison Park, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed on Dec. 17, 2015, as Appl. No. 14/972,128.
Prior Publication US 2017/0174906 A1, Jun. 22, 2017
Int. Cl. C09D 5/03 (2006.01); C09D 5/08 (2006.01); C09D 163/00 (2006.01); C09D 7/40 (2018.01)

CPC C09D 5/033 (2013.01) [C09D 5/03 (2013.01); C09D 5/038 (2013.01); C09D 5/08 (2013.01); C09D 7/69 (2018.01); C09D 163/00 (2013.01)]

2 Claims

1. A substrate at least partially coated with a curable coating composition, the curable coating composition comprising:

(a) a binder comprising:

(i) a film-forming resin comprising at least two functional groups; and

(ii) a curing agent reactive with the functional groups of (i); and

(b) solid vulcanized rubber particles unreactive with any other component included in the curable coating composition, wherein the solid vulcanized rubber particles have a glass transition temperature (T_g) of less than −40° C.,

wherein the solid vulcanized rubber particles have an average particle size of from 10 to 85 microns,

wherein the curable coating composition is a solid particulate powder coating composition,

wherein the solid vulcanized rubber particles are not a component of a core-shell structure formed by reaction within the curable coating composition,

wherein the solid vulcanized rubber particles are crosslinked through sulfur bonds,

wherein the curable coating composition comprises from 1 weight % to 40 weight % of the solid vulcanized rubber particles, based on the total solids weight of the coating composition, and

wherein a coating layer formed from the curable coating composition has a dry film thickness of 300 to 800 microns.