Alkoxysilanes and method for making

Claim 1

An article comprising (A) a substrate coated with a thermoset acrylic primer (B) a hard, protective coating thereon comprising an aqueous coating composition which comprises before curing, (a) a dispersion of a colloidal silica in a solution of the partial condensate of silanol having the formula, R.sup.7 Si(OH).sub.3, where R 7 is selected from the group consisting of C.sub.(1-8) alkyl and C.sub.(6-13) aryl, at least 70 weight percent of which is CH 2 Si(OH) 3 , in a mixture of an aliphatic alcohol and water, said dispersion containing from 10 to 50 percent by weight of solids, said solids consisting essentially of 10 to 70% by weight of colloidal silica and 30 to 90% by weight of the partial condensate and (b) an effective amount of an ultraviolet light absorbing agent comprising a compound having the formula, ##STR9## and alkoxysilyl malonates having the formula, ##STR10## where Y is ##STR11## and Y' is ##STR12## R is a C.sub.(1-8) alkyl radical, R 1 is selected from R, C.sub.(6-13) aryl radicals and halogenated derivatives thereof, R 2 is selected from hydrogen and R radicals, R 3 and R 5 are selected from C.sub.(6-13) aryl radicals, R 4 and R 6 are selected from hydrogen, R and R 3 radicals, Q is selected from --O-- and ##STR13## a is an integer equal to 1 to 3 inclusive, b is a whole number equal to 0 to 2 inclusive and the sum of a+b is equal to 1 to 3 inclusive and c is a whole number equal to 0 to 2 inclusive.