Patent ID: 8741440

Claim:
A non-stick coating composition comprising: a colored base layer for bonding to a substrate, said base layer comprising: 70 to 85% by weight a first matrix comprising a condensation product of a silica sol and an alkoxysilane mixture, said alkoxysilane mixture comprising: 80-95% by weight of at least one organoalkoxysilane of chemical formula R x Si(OR′) 4-x , where R represents an organic substituent, R′ represents an alkyl group, and 0≦x<4, and, 5-20% by weight of polysiloxane; and, 15-30% by weight of a colorant; said base layer comprising a lower portion composed principally of (a) the condensation product of said silica sol and said organoalkoxysilane and (b) said colorant, and a distinct upper portion composed principally of (a) the condensation product of said silica sol and said polysiloxane and (b) said colorant; and, a top layer superimposed upon, and bonded to, said base layer, said top layer comprising a composed of a second matrix comprising a condensation product of a silica sol and an alkoxysilane mixture, said alkoxysilane mixture comprising 80-95% by weight of organoalkoxysilane of chemical formula R x Si(OR′) 4-x , where R represents an organic substituent R′ represents an alkyl group, and 0≦x<4, 5-20% by weight of a polysiloxane, and about 0.3 to about 12% by weight of a fluoroalkylalkoxysilane.