Patent ID: 7713347

Claim:
A sol-gel for surface treatment of a substrate to provide a temperature resistant and erosion resistant coating comprising: an effective amount of an organosilane for forming a sol-gel network on a surface of the substrate; an effective amount of a titanium alkoxide for promoting the hydrolysis of the said organosilane; an organic acid; mica flakes being present in a percent volume loading from about 2 to about 10 percent, based on the total volume of titanium alkoxide and organosilane; an effective amount of one or more additives to improve the impact resistance, heat resistance, or combination thereof of the resulting sol-gel coating; and an effective amount of one or more pigments to control gloss, color, reflectivity or a combination thereof of the substrate when coated with the sol-gel to form a sol coating, and wherein the combined percent volume loading of mica flakes, the one or more additives and the one or more pigments is from about 20 to 40 percent, based on the total volume of the titanium alkoxide and organosilane; wherein curing can be done over short time periods without heating; and wherein the said sol-gel coating has a pitted pencil hardness of at least 2B.