| 摘要 |
PURPOSE: Provided is a coating composition which can be used to paint or repair a variety of substrates such as previously painted metal substrates, cold roll steel, steel coated with conventional primers such as electrodeposition primers, alkyd resin repair primers and the like, plastic type substrates such as polyester reinforced fiber glass, thermoplastic olefin (TPO), reaction injection molded urethanes and partially crystalline polyamides, as well as wood and aluminum substrates. CONSTITUTION: A coating composition contains a film forming binder and a volatile organic liquid carrier binder, wherein the binder contains (A) hydroxyl-containing acrylic polymer and polyhydroxyl-tertiary amine, at least two hydroxyl groups of said amine being indirectly bonded to a nitrogen atom of said amine through a chain containing at least two carbon atoms, and (B) organic polyisocyanate, the ratio of equivalents of isocyanate in (B) per equivalent of hydroxyl groups in (A) being in the range of 0.5/1 to 3.0/1, and (C) an effective amount of catalyst to cure said composition.
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