Abstract Polyester resins containing urethane linkages, comprising: A. The reaction product of (1) a polyester prepared from at least one polycarboxylic acid and at least one polyhydric alcohol substantially free of unsaturated reactants and naturally occurring oils, and (2) an organic polyisocyanate; the ratio of (1) and (2) being such that equivalents of hydroxyl/equivalents of (carboxyl + isocyanate) is greater than 1 and up to about 2.0 and the ratio of equivalents of carboxyl/equivalents of isocyanate is greater than 1 and up to about 30; or B. The reaction product of (1) a polyester prepared from at least one alpha, beta-ethylenically unsaturated polycarboxylic acid and at least one polyhydric alcohol, and (2) an organic polyisocyanate; the ratio of (1) to (2) being such that the ratio of equivalents of hydroxyl/equivalents of (carboxyl + isocyanate) is 0.5 to 2.0 and the ratio of equivalents of carboxyl/equivalents of isocyanate is greater than 1 and up to about 30. Film forming compositions made by blending the saturated resin (A), which may be water dispersible, with 5 to 50 percent of an aminoplast resin in water or organic solvent, or with a free isocyanate containing prepolymer or adduct, or by blending the unsaturated resin (B) with an ethylenically unsaturated monomer and effecting addition polymerization.
A WATER REDUCIBLE RESINOUS COATING COMPOSITION COMPRISING FROM 95 TO 50 PARTS BY WEIGHT OF (1) A WATER-SOLUBLE LOWER ALKYL AMINE SSALT OF A POLYURETHANE MODIFIED POLYESTER CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF: A. A MIXTURE OF SATURATED POLYHYDROXY ALCOHOLS OF WHICH FROM ABOUT 5 TO 25 PERCENT BY WEIGHT CONTAINS AT LEAST THREE FUNCTIONAL GROUPS AND WHEREIN ONE OF SAID THREE FUNCTIONAL GROUPS IS A CARBOXYL GROUP, B. AT LEAST ONE SATURATED POLYCARBOXYLIC ACID, AND; C. AN ORGANIC POLYISOCYANATE COMPOUND; SAID REACTION PRODUCT BEING THE RESULT OF PRELIMINARY REACTION BETWEEN (A) AND (B) TO FORM A SATURATED POLYESTER INTERMEDIATE WHICH IS SUBSEQUENTLY REACTED WITH (C) TO FORM THE MODIFIED POLYESTER, THE PROPORTION OF THE REACTANTS (A), (B) AND (C) BEING SELECTED SO THAT THE OH/(COOH+NCO) RATIO IS FROM 1 TO 2.0 AND THE COOH/NCO RATIO IS GREATER THAN 1 AND UP TO ABOUT 30 AND CORRESPONDINGLY FROM 5 TO 50 PARTS OF AN AMINOPLAST RESIN.
Claim 2
Dependent Claim
157 words
A WATER REDUCIBLE RESINOUS COATING COMPOSITION COMPRISING FROM 95 TO 50 PARTS BY WEIGHT OF (1) A WATER-SOLUBLE LOWER ALKYL AMINE SSALT OF A POLYURETHANE MODIFIED POLYESTER CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF: A. A MIXTURE OF SATURATED POLYHYDROXY ALCOHOLS OF WHICH FROM ABOUT 5 TO 25 PERCENT BY WEIGHT CONTAINS AT LEAST THREE FUNCTIONAL GROUPS AND WHEREIN ONE OF SAID THREE FUNCTIONAL GROUPS IS A CARBOXYL GROUP, B. AT LEAST ONE SATURATED POLYCARBOXYLIC ACID, AND; C. AN ORGANIC POLYISOCYANATE COMPOUND; SAID REACTION PRODUCT BEING THE RESULT OF PRELIMINARY REACTION BETWEEN (A) AND (B) TO FORM A SATURATED POLYESTER INTERMEDIATE WHICH IS SUBSEQUENTLY REACTED WITH (C) TO FORM THE MODIFIED POLYESTER, THE PROPORTION OF THE REACTANTS (A), (B) AND (C) BEING SELECTED SO THAT THE OH/(COOH+NCO) RATIO IS FROM 1 TO 2.0 AND THE COOH/NCO RATIO IS GREATER THAN 1 AND UP TO ABOUT 30 AND CORRESPONDINGLY FROM 5 TO 50 PARTS OF AN AMINOPLAST RESIN.
Claim 3
Dependent Claim
33 words
A coating composition in accordance with claim 1 comprising from 85 to 70 parts of said salt of the polyurethane modified polyester and correspondingly from 15 to 30 parts of said aminoplast resin.
Claim 4
Dependent Claim
34 words
A coating composition in accordance with claim 2 wherein said aminoplast resin is selected from the group consisting of alkylated melamine aldehyde condensates, non-alkylated melamine aldehyde condensates, dicyandiamide aldehyde condensates, and urea aldehyde condensates.
Claim 5
Dependent Claim
18 words
A coating composition in accordance with claim 3 wherein said aminoplast resin is a butylated melamine formaldehyde resin.