Resin derived from polyhydric alcohol, fatty oil, benzene tribasic acid and certain glycols

Claim 1

A PROCESS FOR MAKING AN OIL-MODIFIED ALKYD RESIN WHICH COMPRISES (I) REACTING IN AN INERT ATMOSPHERE AND IN THE PRESENCE OF AN ALCOHOLYSIS CATALYST A POLYHYDRIC ALCOHOL AND A MEMBER FROM THE CLASS CONSISTING OF VEGE TABLE OILS, FISH OIL AND FATTY ACIDS HAVING AT LEAST 10 CARBON ATOMS IN RELATIVE AMOUNTS SUCH THAT ESSENTIALLY ONLY ONE HYDROXYL GROUP IN SAID ALCOHOL REMAINS UNREACTED. AT A TEMPERATURE BETWEEN ABOUT 300* F. AND 500* F. FOR A TIME SUCH THAT THE DESIRED METHANOL COMPATIBILITY IS REACHED, (II) REACTING IN ESSENTIALLY EQUI-MOLAR AMOUNTS THE PRODUCT OF (I) AND AN ACIDIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF TRIMESIC ACID, HEMIMELLITIC ACID, TRIMELLITIC ACID AND TRIMELLITIC ANHYRIDE TO FORM A PROD UCT CONTAINING ESSENTIALLY TWO UNREACTED CARBOXYL GROUPS ON THE ACID MOLECULE, AT A TEMPERATURE BETWEEN ABOUT 400* F. AND 500* F. UNTIL A SINGLE HOMOGENEOUS SOLUTION IS OBTAINED AND (III) REACTING THE PRODUCT OF (II) WITH AN ALCOHOL SELECTED FROM THE CLASS CONSISTING OF ETHYLENE GLYCOL, DIETHYLENE GLYCOL, PENAERYTHRITOL AND BIS-HYDROXY ETHYL ISOPHTHALATE, WHEREIN SAID ALCOHOL IS CHARGED IN AN AMOUNT FROM ABOUT 5 TO ABOUT 20 MOLE PERCENT IN EXCESS OF STOICHIOMETRIC REQUIREMENT. AT A TEMPERATURE BETWEEN ABOUT 400* F. AND 500* F. FOR THE TIME NECESSARY TO OBTAIN THE DESIRED VISCOSITY AND THE DESIRED ACID NUM BER.