Metal primers and coating compositions modified with lower alkyl esters of unsaturated aliphatic acids

Claim 1

A COATING COMPOSITION ADAPTED FOR USE AS A PROTECTIVE COATING IN DIRECT CONTACT WITH CORRODED METAL SUCH AS RUSTY FERROUS METAL, SAID COMPOSITION CONSISTING ESSENTIALLY OF: AN ORGANIC-SOLVENT SOLUTION OF FILM-FORMING WEATHER-RESISTANT MATERIAL OF THE AIR-DRYING TYPE, DISPERSED PIGMENT INCLUDING ANTICORROSIVE PIGMENT IN AN AMOUNT SUFFICIENT TO BRING THE PIGMENT VOLUME INTO THE RANGE OF ABOUT 25% TO 60% OF THE TOTAL VOLUME OF SAID COATING COMPOSITION, AND A LIQUID WETTING ADDITIVE IN AN AMOUNT CORRESPONDING TO ABOUT 5-10% BY WEIGHT OF SAID COATING COMPOSITION, SAID WETTING ADDITIVE BEING AT LEAST ONE ESTER OF (A) MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC MONOHYDRIC ALCOHOLS HAVING UP TO EIGHT CARBON ATOMS, AND (B) MONOCARBOXYLIC ACIDS SELECTED FROM THE GROUP CONSISTING OF (A) THE FATTY ACIDS OF TRIGLYCERIDE DRYING AND SEMI-DRYING OILS, AND (B) MIXTURES OF SAID FATTY ACIDS WITH SMALL AMOUNTS OF ROSIN ACIDS.