NOVELTY - A silicon resin coating composition comprises organosilicone resin; silica filler; powder of mineral particles redispersible in water and/or solvent and redispersed in non-aqueous solvent. The powder contains a polymer, which is phosphonate terminated poly(oxyalkene) polymer (IIA), or water-soluble or water-dispersible polymer (IIB) obtained by polymerizing monomer corresponding to ethylenically unsaturated, aliphatic, cyclic or aromatic monocarboxylic or polycarboxylic acid or anhydride, and monomer corresponding to polyoxyalkylenated ester of ethylenically unsaturated carboxylic acid.    USE - As silicon resin coating composition for coating a substrate (claimed); in solvent-based coatings and paints; in transparent UV-absorbing coatings, scratch-proof or dirt-repellent surfaces, super-hard nanocomposites, photonic materials, ultra-precise polishing aids, fuel cells, highly effective catalysts and in automotive tires.    ADVANTAGE - The composition imparts scratch resistance and anti-soiling properties on plastic substrates such as polycarbonate sheets. The powder of mineral particles having lowest excess of solvent, water or dispersible medium reduces the cost of transportation and shipping.    DETAILED DESCRIPTION - A silicon resin coating composition comprises an organosilicone resin; silica filler; a powder of mineral particles redispersible in water and/or solvent and redispersed in a non-aqueous solvent; and optionally a curing catalyst, a cationic polymerization initiator and a formulation solvent. The powder of mineral particles contains mineral particles; and a polymer which is a phosphonate terminated poly(oxyalkene) polymer (IIA) of formula R6-(O-CH(R5)-CH2)n-(O-CH(R4)-CH2)m-O-R3-P(O)(OR1)(OR2); or is a water-soluble or water-dispersible polymer (IIB) obtained by polymerizing at least one monomer corresponding to an ethylenically unsaturated, linear or branched aliphatic, cyclic or aromatic monocarboxylic or polycarboxylic acid or anhydride, and a monomer corresponding to a polyoxyalkylenated ester of an ethylenically unsaturated carboxylic acid; or from polymerization of at least one ethylenically unsaturated, linear or branched aliphatic, cyclic or aromatic, monocarboxylic or polycarboxylic acid or anhydride.    R1, R2 and R6=H, 1-20C alkyl, 3-20C cycloalkyl or 6-20C aralkyl;    R3=optionally substituted 2-20C alkyl, 4-20C cycloalkyl, or 8-20C aralkyl;    R4 and R5=H or 1-2C alkyl;    m and n=0 - 200.    The groups to which m and n are subscripted are either blocked and/or randomly spaced along the chain between the OR3 and R6 groups. An INDEPENDENT CLAIM is included for a support having the silicon resin coating composition.