Patent ID: 8623989

Claim:
A coating composition comprising polyurea and polythiourea formed from a reaction mixture comprising: a first component comprising (i) an isocyanate selected from one or more of isophorone diisocyanate (IPDI), cyclohexylene diisocyanate, 4,4′-methylenedicyclohexyl diisocyanate (H 12 MDI), tetramethylxylyl diisocyanate, OCN—C(CH 3 ) 2 —C 6 H 4 C(CH 3 ) 2 —NCO, 1,4-tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate (HMDI), 1,7-heptamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, 1,10-decamethylene diisocyanate, 2-methyl-1,5-pentamethylene diisocyanate, phenylene diisocyanate, toluene diisocyanate (TDI), xylene diisocyanate, 1,5-naphthalene diisocyanate, chlorophenylene 2,4-diisocyanate, bitoluene diisocyanate, dianisidine diisocyanate, tolidine diisocyanate, alkylated benzene diisocyanates, methylenediphenyl diisocyanate, 3,3′-dimethyl-4,4′-diphenylmethane diisocyanate, the uretdione of 1,6-hexamethylene diisocyanate, the biuret of 1,6-hexanediisocyanate, the isocyanurate of 1,6-hexanediisocyanate, and the isocyanurate of isophorone diisocyanate; and (ii) an isocyanate functional compound comprising a polythioether-polyurethane and/or polythiourethane; wherein at least 1 percent by weight of the first component comprises at least one polyisocyanate monomer; and a second component comprising an amine and an amine/hydroxy functional polythioether that is different from the amine, wherein the amine/hydroxy functional polythioether comprises an amine-functional reaction product of an epoxy functional polythioether and a polyamine.