Color pigmented moisture curing polyurethane coating having an a

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524590, 524265, 524431, 524451, 528 44, 528 48, 528 52, 528 53, 528 58, 528 59, 528 60, 528 65, 528 66, 528 84, 528 85, C08J 300, C08K 320, C08L 7500, C08G 1800

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059985321

ABSTRACT:
This invention relates to a new and useful color pigmented moisture curing polyurethane coating that has an adjustable drying time, as well as methods of producing the coating. The coating is suitable for use as a protective and/or decorative coating. The coating comprises one or more specified color pigments, polyisocyanates, polyols, tertiary amines, and blocked amines. The blocked amines, in conjunction with the tertiary amines, allow the coating to dry slowly once the coating has been applied, resulting in a defect free surface. Furthermore, an additional catalyst, comprising a metal catalyst may optionally be added to the coating immediately prior to use in order to speed up the rate of drying of the coating, allowing for very precise control of the drying speed of the coating. Additional optional ingredients may be added to the coating composition, including ultraviolet light stabilizers, wetting agents, solvents, and agents to increase slip and flow.

REFERENCES:
patent: 4304706 (1981-12-01), Urs
patent: 4523003 (1985-06-01), Bezwada
patent: 5128423 (1992-07-01), Parrinello
patent: 5506328 (1996-04-01), Chandalia et al.
M.J. Dvorchak, et al., "Aldimine-Isocyanate Chemistry: Application in High Solids Coatings, " Waterborne, Higher-Solids, and Powder Coatings Symposium, Feb. 22-24, 1995, pp. 78-87.
S.M. Lee, et al., "Aldimine-Isocyanate Chemistry: A Foundation for High Solids Coatings, " Waterborne, Higher-Solids, and Powder Coatings Symposiumn, Feb. 22-24, 1995, pp. 69-77.
Wicks, et al., "Amine Chemistries for Isocyanate-Based Coatings, " Progress in Organic Coatings, (1997), vol. 30, pp. 265-270.

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