Organoalkoxysilane-containing coating composition

Abstract

A coating composition comprising: (a) 100 parts by weight (in terms of organoalkoxysilane) of at least one compound selected from the group consisting of (a') an organoalkoxysilane represented by the general formula (I): RSi(OR.sup.1).sub.3 (I) wherein R is an organic group having 1-8 carbon atoms and R.sup.1 is an alkyl group having 1-5 carbon atoms or an acyl group having 1-4 carbon atoms, (a") a hydrolyzate of (a') and (a'") a partial condensate of (a'), (b) 5-50 parts by weight (as solids) of colloidal alumina, and (c.sub.1) 2-200 parts by weight of at least one organopolysiloxane having at least one reactive functional group in the polymer molecule and/or (c.sub.2) 3-6,000 parts by weight of at least one silyl group-containing vinyl polymer having, at the terminal(s) or side chain(s) of the polymer molecule, at least one silyl group having a silicon atom having bonded thereto a hydrolyzable group, and (d) an organic solvent. Said coating composition is excellent in storage stability, can be used at low temperatures and can form a coating film superior in heat resistance, water resistance, boiling water resistance, organic chemical resistance, acid resistance, alkali resistance, corrosion resistance, absorbability and radiatability of heat and light, friction resistance, weather resistance, moisture resistance, salt water resistance, adhesion, hardness and smoothness.

Dependencies are inferred from the claim text.