| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-pack undercoat composition which causes, in using as an undercoat of a multilayered coating film, no topcoat exfoliation due to aging even when a coat film having excellent light transmittance such as a metallic or blue paint color is used as a topcoat, and exhibits excellent durability and fine appearance keeping property. SOLUTION: 1. A one-pack undercoat composition comprising (A) an epoxy resin and/or a modified epoxy resin, (B) an ultraviolet light absorber and a photostabilizer, (C) a rust preventing pigment and (D) a solvent, as essential ingredients, is provided. 2. A coating composition described in the section 1 and further comprising (E) a silane coupling agent is provided. 3. A coating composition described in the section 1 or the section 2, wherein, based on 100 pts.mass total resin solid of the (A) epoxy resin and the modified epoxy resin, the compounding amount of the (B) ultraviolet light absorber is 0.1-10 pts.mass and the compounding amount of the photostabilizer is 0.2-20 pts.mass, is provided. COPYRIGHT: (C)2008,JPO&INPIT
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