US 11,891,537 B2
Triphenylphosphine-containing coatings with enhanced adhesion to unprimed surfaces
Samantha Rose Moran, Rome, GA (US); and Chandrakant Laxman Halli, Cedartown, GA (US)
Assigned to Sheboygan Paint Company, Sheboygan, WI (US)
Filed by Sheboygan Paint Company, Sheboygan, WI (US)
Filed on Mar. 30, 2022, as Appl. No. 17/708,333.
Claims priority of provisional application 63/168,550, filed on Mar. 31, 2021.
Prior Publication US 2022/0325110 A1, Oct. 13, 2022
Int. Cl. C09D 5/08 (2006.01); C09D 7/63 (2018.01); B05D 7/06 (2006.01); B05D 7/14 (2006.01); C09D 133/08 (2006.01); C09D 167/02 (2006.01)
CPC C09D 5/08 (2013.01) [B05D 7/06 (2013.01); B05D 7/14 (2013.01); C09D 7/63 (2018.01); C09D 133/08 (2013.01); C09D 167/02 (2013.01); B05D 2202/10 (2013.01); B05D 2203/20 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A curable resin composition comprising:
(a) at least one component comprising two or more active methylene groups and/or active methine groups;
(b) at least one component comprising at least two α, β-unsaturated carbonyl groups; and
(c) from 0.5 weight percent to 7.5 weight percent of a triphenylphosphine catalyst that promotes a Michael reaction between said components (a) and (b);
wherein the composition cures under ambient conditions; and
wherein the composition exhibits a viscosity substantially similar to the viscosity of one or more of (a) or (b) for a period of at least 15 minutes.