Patent ID: 8809468

Claim:
An epoxy-polysiloxane polymer coating composition comprising: water; a polysiloxane having the formula wherein (a) each R 1 is independently selected from a hydroxy group, an alkyl group having up to six carbon atoms, an aryl group having up to six carbon atoms, or an alkoxy group having up to six carbon atoms, (b) each R 2 is independently selected from a hydrogen, an alkyl group having up to six carbon atoms, or an aryl group having up to six carbon atoms, and (c) n is selected so that the molecular weight for the polysiloxane is in the range of 400 to 10,000; a non-aromatic epoxide resin comprising more than one 1,2-epoxide group per molecule and an epoxide equivalent weight in the range of from 100 to 5,000; and a cure system comprising a blend of alkoxy functional aminosilanes, where the blend has an average alkoxy functionality value ranging from 2.2 to 2.8, wherein the combined composition reacts to form a cross-linked epoxy polysiloxane polymer structure.