New diepoxide-containing polyester resins and coating compositions containing them

Claim 1

AN ORGANIC SOLVENT SOLUBLE OIL-FREE, DIEPOXIDIZED POLYESTER CONSISTING OF THE CONDENSATION PRODUCT OF (A) ABOUT 2 PARTS OF A HALF ESTER FORMED FROM A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ADIPIC ACID AND ISOPHTHALIC ACID AND A DIEPOXIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1,4-BUTANEDIOL DIGLYCIDYL ETHER; VINYL CYCLOHEXENE DIOXIDE; DICYCLOPENTADIENE DIOXIDE; DIPENTENE DIOXIDE; 3,4-EPOXY-6-METHYL CYCLOHEXYLMETHYL3,4-EPOXY-6-METHYLCYCLOHEXANE CARBOXYLATE; BIS-EPOXYDICYCLOPENTYL ETHER OF ETHYLENE GLYCOL, EPOXIDIZED SOYA BEAN OIL; AND THOSE REACTION PRODUCTS OF EPICHLOROHYDRIN AND 2,2-BIS(P-HYDROXY PHENYL) PROPANE HAVING MELTING POINTS RANGING FROM 8*C. TO 76*C., EPOXIDE EQUIVALENTS RANGING FROM 180 TO 550, ESTERIFICATION EQUIVALENTS FROM 80 TO 130, AND MOLECULAR WEIGHTS FROM ABOUT 350 TO ABOUT 900 AND (B) ABOUT 3 TO 16 PARTS OF A MIXTURE OF (1) A MONOBASIC ACID SELECTED FROM THE GROUP CONSISTING OF MONOCARBOXYLIC ALIPHATIC ACIDS HAVING A CHAIN LENGTH OF 8-12 CARBON ATOMS AND PARA-TERTIARY BUTYL BENZOIC ACID, (2) A DIHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF NEOPENTYL GLYCOL AND 1,3 BUTYLENE GLYCOL, (3) A POLYHYDRIC ALCOHOL CONTAINING AT LEAST 3 HYDROXYL GROUPS SELECTED FROM THE GROUP CONSISTING OF TRIMETHYLOL ETHANE, TRIMETHYLOL PROPANE, 1,2,6-HEXANE TRIOL, AND PENTAERYTHRIOL, AND (4) A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF ISOPHTHALIC ACID AND ADIPIC ACID, THE DIBASIC ACID IN (A) BEING DIFFERENT FROM THE DIBASIC ACID IN (B).