Polyester resin coatings containing tetrakis(alkoxymethyl)benzoguanamines

Claim 1

A FLUID COATING COMPOSITION CONSISTING ESSENTIALLY OF (A) THE POLYESTER PRODUCT OF (A) AN ACIDIC MEMBER SELECTED FROM THE CLASS CONSISTING OF TRIMELLITIC ACID, TRIMELLITIC ANHYDRIDE, HEMMIMELLITIC ACID, HEMIMELLITIC ANHYDRIDE AND TRIMESIC ACID, (B) AN ALKYLENE GLYCOL HAVING 2-10 CARBON ATOMS, AND (C) AN ALKANEDIOIC ACID HAVING 4-10 CARBON ATOMS, THE REACTION SYSTEM CONTAINING "SAID ACIDIC MEMBER/SAID GLYCOL/SAID ALKANEDIOIC ACID" IN A MOLAR RATIO IN THE RANGE OF 2.3/7/3 TO 3.2/7/0.5, THE CARBOXYL GROUP AFFORDING REACTANTS AND HYDROXYL GROUP AFFORDING REACTANTS BEING CONTROLLED TO PROVIDE A MOLAR RATIO OF "HYDROXYL GROUPS/CARBOXYL GROUPS" CHARGED TO THE REACTION IN THE RANGE OF 1.05-1.40 AND SAID POLYESTER BEING CHARACTERIZED BY AN ACID NUMBER OF ABOUT 25-80; (B) TETRAKIS(ALKOXYMETHYL)BENZOGUANAMINE WHEREIN EACH ALKOXY GROUP HAS 1-3 CARBON ATOMS, SAID POLYESTER AND SAID BENZOGUANAMINE BEING PHYSICALLY BLENDED, BY WEIGHT, TO MAKE 100 PARTS OF "POLYESTER:BENZOGUANAMINE" BLEND IN A PROPORTION RANGING FROM 95:5 TO 30:70; AND (C) A MEMBER OF THE ROUP CONSISTING OF ORGANIC SOLVENT AND AQUEOUS ALKALINE MEDIUM, SAID MEMBER CAPABLE OF DISSOLVING SAID POLYESTER AND SAID BENZOGUANAMINE, IN AN AMOUNT SUFFICIENT TO FORM A FLUID COMPOSITION OF SAID POLYESTER AND SAID BENZOGUANAMINE.