be frequently prepared by mixing the reaction product containing prepolymer a prepared as above with additional amounts of b and c i i vinyltrimethoxysilane vinyltriethoxysilane vinyltripropoxysilane ii methacryloxymethyl trimethoxysilane methacryloxymethyl triethoxysilane methacryloxymethyl tripropoxysilane acryloxymethyl trimethoxysilane acryloxymethyl triethoxysilane acryloxymethyl tripropoxysilane u03b1 methacryloxyethyl trimethoxysilane u03b1 methacryloxyethyl triethoxysilane u03b1 methacryloxyethyl tripropoxysilane u03b2 methacryloxyethyl trimethoxysilane u03b2 methacryloxyethyl triethoxysilane u03b2 methacryloxyethyl tripropoxysilane u03b1 methacryloxypropyl trimethoxysilane u03b1 methacryloxypropyl triethoxysilane u03b1 methacryloxypropyl tripropoxysilane u03b2 methacryloxypropyl trimethoxysilane u03b2 methacryloxypropyl triethoxysilane u03b2 methacryloxypropyl tripropoxysilane u03b3 methacryloxypropyl trimethoxysilane u03b3 methacryloxypropyl triethoxysilane u03b3 methacryloxypropyl tripropoxysilane iii glycidoxymethyl trimethoxysilane glycidoxymethyl triethoxysilane glycidoxymethyl tripropoxysilane u03b1 glycidoxyethyl trimethoxysilane u03b1 glycidoxyethyl triethoxysilane u03b1 glycidoxyethyl tripropoxysilane u03b2 glycidoxyethyl trimethoxysilane u03b2 glycidoxyethyl triethoxysilane u03b2 glycidoxyethyl tripropoxysilane u03b3 glycidoxypropyl trimethoxysilane u03b3 glycidoxypropyl triethoxysilane u03b3 glycidoxypropyl tripropoxysilane u03b2 glycidoxypropyl trimethoxysilane u03b2 glycidoxypropyl triethoxysilane u03b2 glycidoxypropyl tripropoxysilane u03b1 glycidoxypropyl trimethoxysilane u03b1 glycidoxypropyl triethoxysilane u03b1 glycidoxypropyl tripropoxysilane iv 3 4 epoxycyclohexylmethyl trimethoxysilane 3 4 epoxycyclohexylmethyl triethoxysilane 3 4 epoxycyclohexylmethyl tripropoxysilane u03b1 3 4 epoxycyclohexyl ethyl trimethoxysilane u03b1 3 4 epoxycyclohexyl ethyl triethoxysilane u03b1 3 4 epoxycyclohexyl ethyl tripropoxysilane u03b2 3 4 epoxycyclohexyl ethyl trimethoxysilane u03b2 3 4 epoxycyclohexyl ethyl triethoxysilane u03b2 3 4 epoxycyclohexyl ethyl tripropoxysilane u03b1 3 4 epoxycyclohexyl propyl trimethoxysilane u03b1 3 4 epoxycyclohexyl propyl triethoxysilane u03b1 3 4 epoxycyclohexyl propyl tripropoxysilane u03b2 3 4 epoxycyclohexyl propyl trimethoxysilane u03b2 3 4 epoxycyclohexyl propyl triethoxysilane u03b2 3 4 epoxycyclohexyl propyl tripropoxysilane u03b3 3 4 epoxycyclohexyl propyl trimethoxysilane u03b3 3 4 epoxycyclohexyl propyl triethoxysilane u03b3 3 4 epoxycyclohexyl propyl tripropoxysilane v methyl silicate ethyl silicate propyl silicate butyl silicate and hydrolysates of these silicon compounds ii a polymer or copolymer of any of dipropargyl maleate dipropargyl fumarate triallyl cyanurate triacryl formal diallyl maleate diallyl itaconate diallyl succinate trimethylolpropane trimethacrylate trimethylolpropane triacrylate diethyleneglycol bis allylcarbonate diallyl benzenephosphate diallyl benzenephosphonate diethyleneglycol dimethacrylate diethyleneglycol diacrylate.