US 12,344,762 B2
Phosphate resistant electrodepositable coating compositions
Elizabeth Stephenie Brown-Tseng, Gibsonia, PA (US); Lee Brent Steely, Sewickley, PA (US); Richard F. Syput, Lower Burrell, PA (US); Corey James Dedomenic, Trafford, PA (US); Christopher Andrew Dacko, Pittsburgh, PA (US); Egle Puodziukynaite, Ridgecrest, CA (US); Kevin Thomas Sylvester, Pittsburgh, PA (US); Benjamin Kabagambe, Cheswick, PA (US); Katie Marie Cumpston, North Versailles, PA (US); and David Alfred Stone, Allison Park, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Appl. No. 18/259,434
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
PCT Filed Dec. 30, 2021, PCT No. PCT/US2021/065690
§ 371(c)(1), (2) Date Jun. 27, 2023,
PCT Pub. No. WO2022/147255, PCT Pub. Date Jul. 7, 2022.
Claims priority of provisional application 63/132,719, filed on Dec. 31, 2020.
Prior Publication US 2024/0076520 A1, Mar. 7, 2024
Int. Cl. C09D 175/08 (2006.01); C08G 18/08 (2006.01); C08G 18/16 (2006.01); C08G 18/20 (2006.01); C08G 18/22 (2006.01); C08G 18/28 (2006.01); C08G 18/32 (2006.01); C08G 18/58 (2006.01); C08G 18/76 (2006.01); C08G 18/80 (2006.01); C09D 5/44 (2006.01); C25D 3/54 (2006.01); C25D 5/54 (2006.01); C25D 13/06 (2006.01)
CPC C09D 175/08 (2013.01) [C08G 18/0814 (2013.01); C08G 18/163 (2013.01); C08G 18/2072 (2013.01); C08G 18/227 (2013.01); C08G 18/2835 (2013.01); C08G 18/3206 (2013.01); C08G 18/584 (2013.01); C08G 18/7664 (2013.01); C08G 18/8019 (2013.01); C08G 18/8064 (2013.01); C09D 5/4465 (2013.01); C09D 5/448 (2013.01); C25D 3/54 (2013.01); C25D 5/54 (2013.01); C25D 13/06 (2013.01); C08G 2150/00 (2013.01)] 15 Claims
 
1. An electrodepositable coating composition comprising:
(a) an electrodepositable binder comprising:
(1) an ionic salt group-containing film-forming polymer comprising active hydrogen functional groups; and
(2) a blocked polyisocyanate curing agent;
(b) a solubilized bismuth catalyst;
(c) a guanidine;
wherein the electrodepositable coating composition has a weight ratio of bismuth metal from the solubilized bismuth catalyst to guanidine of from 1.00:0.071 to 1.0:2.1 and/or a molar ratio of bismuth metal to guanidine of from 1.0:0.25 to 1.0:3.0.