Polycaprolactone-epoxide adducts and coating compositions thereof
Patent 4086294 Issued on April 25, 1978. Estimated Expiration Date: 
April 25, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 25, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3408421 3576903 3723569 3896303 InventorsAssigneeApplicationNo. 690283 filed on 05/26/1976US Classes:525/411, Mixed with carboxylic acid or derivative reactant or polymer therefrom525/415, Solid polymer derived from carboxylic acid cyclic ester, e.g., lactone, etc.528/354, From compound having -C-C(=O)-O-C- group as part of a heterocyclic ring, e.g., lactone, etc.528/365, With reactant containing at least one cyclic ether group528/418, Reactant contains two or more rings each of said rings having a single oxygen and two carbon atoms560/180Polycarboxylic acidExaminersPrimary: Anderson, Harold D.Assistant: Nielsen, E. A. Attorney, Agent or FirmInternational ClassesC08G 063/76C08G 063/02 C08L 067/04 AbstractWater insoluble polycaprolactone-epoxide adducts are produced comprising the reaction product of a polycaprolactone polyol, a diepoxide and an anhydride of a polycarboxylic acid. The polycaprolactone polyol reacted with the diepoxide and the anhydride of the polycarboxylic acid has at least two hydroxyl groups in the molecule, a hydroxyl number of from about 15 to about 600 and an average molecular weight of from about 290 to about 6,000. The carboxylic acid anhydride has at least one intramolecular carboxylic anhydride group. These water insoluble polycaprolactone-epoxide adducts on reaction with an inorganic or organic base produce water soluble, carboxyl modifier polycarprolactone-epoxide oligomer addition reaction products which are eminently suitable for the production of aqueous coatings compositions. Exceptionally good coatings compositions are obtained when a crosslinker is present in the coating composition.Other References
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