Patent ID: 6939908

Claim:
A transparent and abrasion resistant coating comprising: a) a transparent organic-inorganic compound, the organic-inorganic compound being selected from a group consisting of: 3-glycidoxypropyltrimethoxysilane (GPTS), n-methylaminopropyltrimethoxysilane, methacryloxypropyltrimethoxy silane, titanium methacrylate triisopropoxide, 5-6 epoxyhexyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane and diethylenetriamine (DETA)functionalized at its amine groups with 3-isocyanatopropyltriethoxysilane; b) large-sized abrasion resistant particles/aggregates of γ-phase Al 2 O 3 , having an average size of 100 nm to 400 nm and c) nanosized ceramic particles for raising the index of refraction of the polymer to that of the abrasion resistant ceramic particles, the nanosized ceramic particles having an average size of less than 100 nm.