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    • 5. 发明专利
    • Electrodeposition method using lead-free cation electrodeposition coating material
    • 使用无铅电沉积涂料的电沉积方法
    • JP2003277682A
    • 2003-10-02
    • JP2002086381
    • 2002-03-26
    • Nippon Paint Co LtdToyota Motor Corpトヨタ自動車株式会社日本ペイント株式会社
    • UCHITOI SATORUKOJIMA YOSHIOYAMADA MITSUOYOKOI SEIJIKODAMA SATOSHI
    • C09D163/00C09D5/44C09D163/02C09D163/04C09D175/04C25D13/06C25D13/22
    • C09D5/4473C25D13/22
    • PROBLEM TO BE SOLVED: To provide an electrodeposition method using a lead-free cation electrodeposition coating material not forming pinholes and craters in the coating film even when using a zinc steel plate as the material to be coated, excellent in economical efficiency because of a small amount of the electrodeposition coating material used, having slight influence on the environment, enabling short-time electrodeposition.
      SOLUTION: The electrodeposition is carried out at a temperature lower by ≤2°C than the lowest film-forming temperature of the coating film and higher by ≤6°C than the lowest film-forming temperature by using the lead-free cation electrodeposition coating material composition comprising a sulfonium- modified epoxy resin as a binder resin, an amino-modified novolak epoxy resin and a blocked isocyanate curing agent, having ≤1 wt.% volatile organic content and 1,000-2,500 μS/cm coating liquid electric conductivity and 20-35°C lowest film-forming temperature of the coating film electrodeposited to the material to be coated.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:即使在使用锌钢板作为被覆材料的情况下,也可以使用在涂膜中不形成针孔和凹坑的无铅阳离子电沉积涂料的电沉积法,经济效率优异,因为 的少量电沉积涂料,对环境有轻微的影响,能够进行短时间的电沉积。

      解决方案:电沉积在比涂膜的最低成膜温度低2℃的温度下进行,并且比最低成膜温度高不超过6℃ 阳离子电沉积涂料组合物,其包含锍改性环氧树脂作为粘合剂树脂,氨基改性酚醛清漆环氧树脂和封端异氰酸酯固化剂,具有≤1wt%挥发性有机物含量和1,000-2,500μS/ cm涂布液体电 电导率和20-35℃最低成膜温度的涂膜电沉积到待涂覆的材料上。 版权所有(C)2004,JPO

    • 6. 发明专利
    • Multilayer coating film forming method
    • 多层涂膜成膜方法
    • JP2003275666A
    • 2003-09-30
    • JP2002082481
    • 2002-03-25
    • Kansai Paint Co LtdToyota Motor Corpトヨタ自動車株式会社関西ペイント株式会社
    • YOKOI SEIJINOURA KIMISUKENISHIDA TAKAMITSU
    • B05D1/36B05D1/06B05D7/14B05D7/24
    • PROBLEM TO BE SOLVED: To provide a multilayer coating film forming method which can reduce VOC (volatile organic compounds) during a coating process and form a multilayer coating film having excellent finished appearance.
      SOLUTION: In this multilayer coating film forming method, the surface of a metal material to be coated is electrodeposited with a thermosetting cationic electrodeposition coating (1), the surface of the unhardened electrodeposition coating film or the surface of the baked and hardened electrodeposition coating film is coated with a thermosetting water-based intermediate coating (2), a thermosetting water-based color base coating (3) is coated after baking the electrodeposition coating film and the intermediate coating film, or the intermediate coating film to be hardened, the surface of the unhardened color base coating film is electrostatically coated with a thermosetting clear powder coating (4), where a volume average particle diameter of powder coating particles is in a range of 5-15 μm and a minimum viscosity on melting until starting hardening is in a range of 0.1-2 Pa.s, so that a hardened film thickness is 35-45 μm, and the color base coating film and the clear powder coating film are baked to be hardened at the same time (5).
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:提供一种可以在涂布过程中减少VOC(挥发性有机化合物)的多层涂膜形成方法,并形成具有优异外观的多层涂膜。 解决方案:在这种多层涂膜形成方法中,将待涂覆的金属材料的表面用热固性阳离子电沉积涂层(1),未硬化的电沉积涂膜的表面或烘烤和硬化的表面进行电沉积 电沉积涂膜用热固性水基中间涂层(2)涂覆,烘烤电沉积涂膜和中间涂膜后,涂覆热固性水性色底涂层(3)或待硬化的中间涂膜 未硬化的基底涂膜的表面用热固性透明粉末涂料(4)静电涂覆,其中粉末涂料颗粒的体积平均粒径在5-15μm的范围内,熔融时的最小粘度直到起始 硬度在0.1-2Pa·s的范围内,使得硬化膜的厚度为35-45μm,并且着色涂层膜和透明粉末涂层 同时烘烤硬化硬化膜(5)。 版权所有(C)2003,JPO