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    • 1. 发明专利
    • Coating composition and coated article
    • 涂料组合物和涂层物品
    • JP2007023069A
    • 2007-02-01
    • JP2005202990
    • 2005-07-12
    • Basf Coatings Japan LtdBasfコーティングスジャパン株式会社
    • NIIMI RUIMITSUMUNE SHINJIKONISHI TORUITO TAKEHITOTAKEMOTO MASAYUKITAKAGI HIROYUKI
    • C09D175/04C09D133/14
    • C09D175/04C08G18/6233C08G18/6237C08G18/7831
    • 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. SOLUTION: The clear coating composition comprises (A) an acrylic copolymer containing 35-50 mass% unit of ε-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. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种提供耐洗涤性,耐污染性和耐候性优异的涂膜的涂料组合物。 解决方案:透明涂料组合物包含(A)含有35-50质量%的ε-己内酯单元的丙烯酸共聚物,其树脂固含量为200-340mg KOH / g羟基值和5,000-15,000重量平均值 分子量和(B)非黄变型多异氰酸酯化合物。 在涂料组合物中,组分(B)的异氰酸酯基以相对于组分(A)的1当量羟基为0.5-2当量的比例和从涂料组合物得到的固化涂膜的杨氏模量为≤ 交联之间的1.5Pa和分子量(Mc)≤350g/ mol,固化涂膜的玻璃化转变温度(Tg)≥65℃。 版权所有(C)2007,JPO&INPIT