Coating processes – Applying superposed diverse coating or coating a coated base – Synthetic resin coating
Patent
1979-07-27
1981-03-03
Silverberg, Sam
Coating processes
Applying superposed diverse coating or coating a coated base
Synthetic resin coating
4284251, 4284244, 4274071, 260 40TN, C08L 6120, C08L 6126
Patent
active
042541689
ABSTRACT:
The invention is a method of coating a substrate with a chip-resistant polyurethane protective coating which contains pigmented acrylic lacquer, acrylic enamel or nitro-cellulose lacquer. This blend provides a coating composition which matches the colors of the existing pigmented protective surface of a substrate such as an automobile. The method involves supplying to a substrate a liquid curable primary amine-free polyurethane coating composition containing a catalyzed mixture of polyester polyol, polyisocyanate compound, and organic solvent, permitting the organic solvent to flash evaporate until the coating exhibits a tacky surface condition, and then applying sufficient uniform coats to cover the substrate with a mixture of the unpigmented polyurethane coating composition and a liquid pigmented protective coating composition selected from the group consisting of acrylic lacquer, acrylic enamel, and nitrocellulose reduced with compatible solvent for use.
REFERENCES:
patent: 3396210 (1968-08-01), McKillip
patent: 3401143 (1968-09-01), Finelli
patent: 3458459 (1969-07-01), Wooster
patent: 3557043 (1971-01-01), Knauss
patent: 3769069 (1973-10-01), Sawyar
patent: 3871911 (1975-03-01), Conacher
patent: 3962522 (1976-06-01), Chang
patent: 4131693 (1978-12-01), Wendt
Polyurethanes, Part II, Saunders & Frisch, p. 344.
Alexander Cruzan
Francis Richard
Minnesota Mining and Manufacturing Company
Sell Donald M.
Silverberg Sam
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