Catalyst for water-soluble baking type resins

Claim 1

AN AQUEOUS SOLUTION OF RESINOUS REACTION PRODUCT OF REACTANTS CONSISTING ESSENTIALLY OF (1) THE POLYESTER CONDENSATION REACTION PRODUCT OF (A) BENZENE TRICARBOXYLIC ACIDIC MEMBER SELECTED FROM THE GROUP CONSISTING OF TRIMELLITIC ACID, TRIMELLITIC ANHYDRIDE, TRIMESIC ACID, HEMIMELLITIC ACID AND HEMIMELLITIC ANHYDRIDE, (B) ALKANDIOIC ACID HAVING FROM 4 TO ABOUT 20 CARBON ATOMS, AND (C) AN ALKYLENE GLYCOL HAVING LESS THAN 12 CARBON ATOMS, WHERE THE MOLE RATIO OF TRICARBOXYLIC ACIDIC MEMBER:ALKANDIOIC MEMBER:GLYCOL IS BETWEEN ABOUT 1:1:2 AND 10:1:25, SAID REACTION BEING CONTINUED UNTIL THE PRODUCT HAS AN ACID NUMBER BETWEEN ABOUT 20 AND ABOUT 100, WHICH PRODUCT IS CHARACTERIZED BY THE FORMATION OF A THERMOSET SOLID UPON AIR-BAKING AT A TEMPERATURE ON THE ORDER OF 400*F., WITH (2) AN ALKALINE SUBSTANCE SELECTED FROM THE CLASS CONSISTING OF AMMONIA, LOWER MOLECULAR WEIGHT ALKYL AMINES, AMINE ALIPHATIC ALCOHOLS, AND HETEROCYCLIC AMINES, SAID (1) AND (2) BEING REACTED IN A WATER MEDIUM WHEREBY AN AQUEOUS SOLUTION OF RESINOUS REACTION PRODUCT IS OBTAINED, SAID AQUEOUS SOLUTION BEING CHARACTERIZED BY A PH OF BETWEEN ABOUT 5 AND 8 AND (3) DISSOLVED IN SAID SOLUTION, A WATER SOLUBLE METAL ION AFFORDING COMPOUND IN AN AMOUNT SUCH THAT BETWEEN ABOUT 0.1 AND 2 WEIGHT PERCENT, BASED ON SAID RESINOUS REACTION PRODUCT, OF SAID METAL ION IS PRESENT, AND SAID METAL BEING SELECTED FROM THE CLASS CONSISTING OF ALUMINUM, BARIUM, BORON, CALCIUM, AND ZINC.