Silicone resin coating composition

An aqueous coating composition prepared by admixing an aqueous colloidal silica dispersion having a particle size of from 5 to 150 millimicrons in diameter with a solution of an alkyltriacetoxysilane in an alkyltrialkoxysilane, maintaining the temperature of the admixture at from about 20.degree. C. to about 30.degree. C. for a sufficient time to reduce the reaction mixture to one liquid phase maintaining the pH of the composition in the range of from about 7.1 to about 7.8, adjusting the solids content of the reaction mixture by the addition of a lower-aliphatic alcohol thereto in an amount sufficient to provide from about 20 to 75 percent of said lower-aliphatic alcohol component and adding from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl guar gum and hydroxypropyl cellulose to the admixture.

An aqueous coating composition comprising a dispersion of colloidal silica having a particle size of from 5 to 15 millimicrons in diameter in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH).sub.3, wherein the lower-aliphatic alcohol-water solvent contains from about 20 to 75 weight percent of said lower-aliphatic alcohol component and wherein R is selected from the group consisting of alkyl having from 1 to 3 carbon atoms and aryl, at least 70 weight percent of the silanol being CH.sub.3 Si(OH).sub.3, said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate, the composition further containing from about 0.1 to about 1 percent by weight of a thickening agent selected from the group consisting of hydroxypropyl cellulose and hydroxypropyl guar gum.