Patent ID: 8003723
Filing Date: 2011-08-23
Classification: C08K,C08L,C09D,F24C

Abstract:
1. A coating solution for forming a hardened pyrolysis resistant coating finish based on a mixture of at least one silane and at least one polysiloxane curable by hydrolysis and condensation on a substrate to thereby produce a coating on the substrate, the least one silane having the general formula R X Si(OR′) 4-X and the at least one polysiloxane having the general formula [R 2 SiO] y or R 3 Si—(O—SiR 2 ) y —O—SiR 3 wherein the residues R are independently alkyl, aryl, arylalkyl, alkylaryl or H; the residues R′ are independently H, methyl, ethyl, n- or i-propyl, n-, iso-, sec- or tert-butyl; x=0 or 1 (for the first silane); x=0, 1, 2, 3 or 4 (for each additional silane); and y is an integer which is at least 2; the coating solution comprising at least one alkali or alkaline-earth metal containing reagent selected from the group consisting of alkali oxide, alkali hydroxide, alkaline earth oxide, and alkaline earth hydroxide; wherein the ratio of the silane and polysiloxane mixture to the alkali or alkaline-earth metal containing reagent, referred to the atomic ratio Si:alkali/alkaline-earth metal, is 20:1 to 5:1.