	US 12,275,861 B2
	Impact resistant coating compositions, multi-layer coating systems, and substrates at least partially coated with such compositions
Troy James Larimer, North Huntingdon, PA (US); John Robert Schneider, Sharpsburg, PA (US); Amy Liane Toolis, Pittsburgh, PA (US); and Anthony Michael Chasser, Allison Park, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG INDUSTRIS OHIO, INC., Cleveland, OH (US)
Filed on Jun. 5, 2023, as Appl. No. 18/329,260.
Application 18/329,260 is a division of application No. 14/972,128, filed on Dec. 17, 2015, granted, now 11,718,762.
Prior Publication US 2023/0348730 A1, Nov. 2, 2023
Int. Cl. C09D 5/03 (2006.01); C09D 5/08 (2006.01); C09D 7/40 (2018.01); C09D 163/00 (2006.01)

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)]

20 Claims

1. A multi-layer coating system comprising:

(1) a first coating layer applied to a substrate and having a dry film thickness of 300 to 800 microns; and

(2) a second coating layer deposited over the first coating layer,

wherein the first coating layer is prepared from a 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 the binder, wherein the solid vulcanized rubber particles have an average particle size of at least 10 microns, and wherein the curable coating composition is a solid particulate powder coating composition.