Powdery coating composition
AssigneeKansai Paint Co., Ltd.
InventorsIchiro Yoshihara, Tadashi Watanabe, Osamu Iwase
Life of this patent
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Abstract
The powdery coating composition of the present invention comprises: (i) 10 to 40% by weight of a solid cross-linking agent prepared by heating polyester and alkoxyaminotriazine, and (ii) 90 to 60% by weight of a base resin. An object of the present invention is to provide a powdery coating composition which will not pose any environmental pollution and has an outstanding property against bubbling. The above object can be fulfilled by using the solid cross-linking agent in combination with a base resin.
Claims14
A powdery coating composition comprising (1) 10 to 40% by weight of a solid cross-linking agent having softening point of 50.degree. to 120.degree. C. and prepared by heating 40 to 70% by weight of polyester having free hydroxyl groups with 60 to 30% by weight of an alkoxyaminotriazone at a temperature of 50.degree. to 120.degree. C. in the presence of a solvent for 1 to 6 hours, and (2) 90 to 60% by weight of a polyester, acrylic resin or mixtures thereof having a softening point of 60.degree. to 130.degree. C. and an acid value of up to 30 and containing 0.4 to 2.0 moles of free hydroxyl groups per kilogram of the resin, the alkoxyaminotriazine having 0 to 1 non-methylolated NH bond per triazine ring, at least 80% of the methylol groups of the alkoxyaminotriazine having been alkoxylated with alcohol.
Dependencies are inferred from the claim text.