Interpolymer formed from monovinylaromatic polymer, drying oil or acid, polyhydric alcohol, and polybasic acid

Claim 1

AN UNGELLED RESINOUS INTERPOLYMER FORMED BY POLYMERIZATION OF FROM 40 TO 60 PERCENT BY WEIGHT OF (A) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DRYING OILS AND DRYING OIL FATTY ACIDS HAVING AN AVERAGE WOBURN IODINE NUMBER BETWEEN ABOUT 133 AND 274 AND AN AVERAGE WOBURN DIENE NUMBER BETWEEN ABOUT 33 AND 91, (B) FROM 5 TO 15 PERCENT BY WEIGHT OF AN OIL-SOLUBLE POLYMER OF A MONOVINYLAROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLNAPHTHALENE, FLUOROSTYRENE, CHLOROSTYRENE, METHOXYSTYRENE, HYDROXYSTYRENE, METHYLSTYRENE, TRICHLOROMETHYLSTYRENE, TRIFLUOROMETHYLSTYRENE, AND ALPHA-METHYLSTYRENE, SAID MONOVINYLAROMATIC POLYMER CONSISTING OF AT LEAST 85 PERCENT BY WEIGHT OF POLYMERIZED MONOVINYLAROMATIC COMPOUND MONOMER, THE REMAINDER BEING (C) A POLYHYDRIC ALCOHOL CONTAINING AS SOLE FUNCTIONAL GROUPS AT LEAST THREE AND NOT MORE THAN SIX HYDROXYL GROUPS PER MOLECULE, AND (D) A MONOMERIC POLYBASIC ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF SATURATED AND UNSATURATED POLYBASIC ACIDS CONTAINING CARBOXYL GROUPS AS SOLE FUNCTIONAL GROUPS, THE RELATIVE PROPORTIONS OF (C) AND (D) BEING SUCH AS TO RENDER THE RATIO OF HYDROXYL GROUPS TO CARBOXYL GROUPS IN THE STARTING REACTANTS BETWEEN ABOUT 1.1 AND 2.0 TO 1, THE SAID INTERPOLYMER HAVING AN ACID VALUE BELOW 30.