| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a coating composition providing a coated film excellent in resistance to damage by a car wash, stain resistance and weather resistance. <P>SOLUTION: The clear coating composition comprises (A) an acrylic copolymer containing 35-50 mass% unit ofε-caprolactone in a resin solid content and having 200-340 mg KOH/g hydroxy group value and 5,000-15,000 weight average molecular weight and (B) a non-yellowing type polyisocyanate compound. In the coating composition, the isocyanate group of the component (B) is contained in a ratio of 0.5-2 equivalents based on 1 equivalent hydroxy group of the component (A) and Young's modulus of cured coated film obtained from the coating composition is≤1.5 Pa and molecular weight (Mc) between cross-links is≤350 g/mol and glass transition temperature (Tg) of the cured coated film is≥65°C. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
