US 12,384,135 B2
Curable film-forming compositions containing lithium silicates as corrosion inhibitors and multilayer coated metal substrates
Elizabeth A. Furar, Pittsburgh, PA (US); Michael A. Mayo, Pittsburgh, PA (US); Eric L. Morris, Murrieta, CA (US); and Tommy G. Bunten, Fountain Valley, CA (US)
Assigned to PRC-DESOTO INTERNATIONAL, INC., Slymar (CA)
Appl. No. 15/578,157
Filed by PRC-DeSoto International, Inc., Sylmar, CA (US)
PCT Filed May 27, 2016, PCT No. PCT/US2016/034544
§ 371(c)(1), (2) Date Nov. 29, 2017,
PCT Pub. No. WO2016/196252, PCT Pub. Date Dec. 8, 2016.
Claims priority of provisional application 62/168,170, filed on May 29, 2015.
Prior Publication US 2018/0162099 A1, Jun. 14, 2018
Int. Cl. C09D 5/00 (2006.01); B32B 15/08 (2006.01); C01B 33/32 (2006.01); C08L 27/12 (2006.01); C08L 75/04 (2006.01); C09D 5/08 (2006.01); C08L 87/00 (2006.01)
CPC B32B 15/08 (2013.01) [C01B 33/32 (2013.01); C08L 27/12 (2013.01); C08L 75/04 (2013.01); C09D 5/00 (2013.01); B32B 2264/102 (2013.01); C08L 87/00 (2013.01); C08L 2203/16 (2013.01)] 22 Claims
 
1. A curable film-forming composition comprising:
(1) a thermosetting, organic film-forming binder component comprising: (a) a resin component comprising a diglycidyl ether of Bisphenol A; and (b) a curing agent component comprising a polyamine and a polyamide, wherein the curing agent is present in an amount of 33 to 46 percent by weight, based on the total weight of resin solids in the composition; and
(2) a corrosion inhibiting component comprising a lithium silicate, present in the curable film-forming composition in an amount of 0.8 to 3.5 percent lithium by weight, based on the total weight of resin solids in the curable film-forming composition,
wherein the lithium silicate comprises lithium orthosilicate and/or lithium metasilicate.