| 摘要 |
An improved high solids coating composition that contains at least 50% by weight of a binder of film-forming constituents in which the constituents are of (A) an acrylic polymer that has a number average molecular weight of about 500-10,000, a hydroxyl content of at least 2% by weight and contains about 2-10% by weight of a chain transfer agent, and consists essentially of an alkyl methacrylate, a hydroxyalkyl acrylate, or a hydroxyalkyl methacrylate; and optionally, an alkyl acrylate or styrene and (B) an organic polyisocyanate cross-linking agent; the improvement used with this composition is the addition of select ultraviolet light stabilizers and optionally, antioxidants. The composition is particularly useful for clear coat/color coat exterior finishes for automobiles, trucks and airplanes. |
