Alkyd-silicone coaung

Claim 1

A COATING COMPOSITION PARTICULARLY ADAPTED TO YIELD BAKED FILMS HAVING AN APPEARANCE SIMULATING HAMMERED METAL AND ADAPTED TO ENDURE PROLONGED SERVICE AT MODERATELY ELEVATED TEMPERATURES, SAID COMPOSITION COMPRISING A VEHICLE COMPOSED ESSENTIALLY OF AN AROMATIC HYDROCARBON SOLVENT SOLUTION OF A COBODIED INTER-REACTION PRODUCT OF (A) BETWEEN 20 AND 80 PARTS OF AN ALKYD RESIN (1) WHICH IS FREE OF NON-BENZENOID UNSATURATION BETWEEN CARBONS IN THE POLYCARBOXYLIC ACID AND POLYHYDRIC ALCOHOL RADICALS THEREOF, (2) WHICH HAS BEEN MODIFIED MOLECULARLY WITH FATTY ACIDS OF AT LEAST ONE GLYCERIDE OIL SELECTED FROM THE CLASS CONSISTING OF DRYING AND SEMI-DRYING OILS, THE AMOUNT OF FATTY ACIDS BEING EQUIVALENT TO AN OIL CONTENT OF BETWEEN ABOUT 40% AND 70% BY WEIGHT OF THE MODIFIED ALKYD RESIN, AND (3) WHICH HAS BEEN MODIFIED IN ITS FATTY ACID PORTIONS WITH AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, A METHYL STYRENE AND VINYL TOLUENE IN AN AMOUNT BETWEEN ABOUT 40% AND 60% BY WEIGHT OF THE FATTY ACID MODIFIED ALKYD RESIN WITH (B) BETWEEN 80 AND 20 PARTS OF A SILOXANOL WHICH IS CHARACTERIZED (1) BY HAVING ITS SILICON ATOMS BONDED TOGETHER BY SI-O-SI LINKAGES, (2) BY HAVING THE REMAINING VALENCES OF ITS SILICON ATOMS SATISFIED BY METHYL, PHENYL AND HYDROXYL GROUPS, (3) BY HAVING AN AVERAGE TOTAL OF BETWEEN ABOUT 1 AND 1.7 METHYL AND PHENYL GROUPS PER SILICON ATOM WITH BETWEEN 10% AND 90% OF THE TOTAL PHENYL AND METHYL GROUPS BEING PHENYL GROUPS, (4) BY HAVING AN HYDROXYL CONTENT OF BETWEEN ABOUT 0.45% AND 20% BY WEIGHT OF THE SILOXANOL SOLIDS, AND (5) BY BEING SOLUBLE IN AROMATIC HYDROCARBON SOLVENT, SAID INTER-REACTION PRODUCT HAVING BEEN PRODUCED BY COBODYING THE ALKYD RESIN WITH SAID SILOXANOL UNDER REFLUX CONDITIONS IN AN AROMATIC HYDROCARBON SOLVENT WITH REMOVAL OF LIBERATED WATER OF REACTION UNTIL A SUBSTANTIAL INCREASE IN VISCOSITY SHORT OF GELATION HAD BEEN SECURED.