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    • 3. 发明申请
    • Method of forming a cationic electrodeposition film forming an electric through hole and an electric through hole-forming cationic electrocoating composition
    • 形成电通孔的阳离子电沉积膜和电穿孔成型阳离子电涂组合物的方法
    • US20070089996A1
    • 2007-04-26
    • US10571424
    • 2004-09-13
    • Yoshio Kojima
    • Yoshio Kojima
    • B01D57/02C25D13/06
    • C09D5/4488
    • It is an object of the present invention to provide a method of forming a cationic electrodeposition film, which has no detrimental effect on basic performances of electrodeposition that a curing property in low temperature and the stability of pigment dispersion are good and basic performances such as corrosion resistance and a rust-preventive property are maintained while maintaining both surface smoothness and economical advantage and exhibits the extremely precise throwing power and can attain an excellent ability of preventing a pinhole due to gas. A method of forming a cationic electrodeposition film, comprising immersing an article to be coated, composed of a galvanized steel sheet, into a bath tank filled with a cationic electrocoating liquid containing a base resin and forming an electrodeposition film on the surface of the above galvanized steel sheet by current-carrying, wherein an electric through hole is formed within the above film to secure the conductivity of the above film in order to wipe out a spark discharge phenomenon arising due to the presence of a hydrogen bubble produced through cohesion of hydrogen gas, with the passage of time, generated by the above current-carrying at a gap of the film, which develops in depositing/forming the film by the above current-carrying and increasing its thickness with the passage of time, on the surface of the above galvanized steel sheet, and thereby an increase in an electric resistance value (kΩ·cm2) per unit weight (mg) of the above film is inhibited.
    • 本发明的目的是提供一种形成阳离子电沉积膜的方法,其对电沉积的基本性能没有不利影响,即低温下的固化性能和颜料分散体的稳定性良好,腐蚀性等基本性能 保持电阻和防锈性,同时保持表面光滑度和经济性,并且具有极其精确的抛光力,并且可以获得防止由于气体引起的针孔的优异的能力。 一种形成阳离子电沉积膜的方法,包括将由镀锌钢板构成的待涂覆制品浸入填充有含有基础树脂的阳离子电泳涂料的浴槽中,并在上述镀锌层的表面上形成电沉积膜 钢板,其中在上述膜内形成电气通孔以确保上述膜的导电性,以便消除由于氢气的内聚产生的氢气泡的存在而产生的火花放电现象 随着时间的推移,由上述载流子在膜的间隙产生的上述电流产生,该膜的间隙通过上述载流子沉积/形成膜而随着时间的推移而增加其厚度, 上述镀锌钢板,因此上述膜的单位重量(mg)的电阻值(kOmega.cm 2)的上升被抑制。
    • 5. 发明授权
    • Process for forming layered coated film, and layered coated film
    • 形成层状涂膜的方法和分层涂膜
    • US07005051B2
    • 2006-02-28
    • US10107372
    • 2002-03-28
    • Yoshio KojimaMitsuo YamadaShoki Tsuji
    • Yoshio KojimaMitsuo YamadaShoki Tsuji
    • C25D13/10
    • C09D5/443C25D13/22Y10T428/31504
    • Disclosed is a three coat one bake coating process for forming an intermediate coated film, a base coated film and a clear coated film on an electrodeposition coated film. The electrodeposition coating composition is a lead-free cationic electrodeposition coating composition which has a volatile organic content of 1% by weight or less, a metal ion content of 500 ppm or less, a neutralizing acid amount of 10 to 30 mg equivalent based on 100 g of binder resin solid content. The intermediate coating composition and/or the base coated composition comprises a specific amount of a nonaqueous dispersion resin as a resin component. In the coating process, a baking step is omitted from the conventional intermediate coating process, or from the conventional base coating process.
    • 公开了一种用于在电沉积涂膜上形成中间涂膜,底涂层和透明涂膜的三层一烘烤方法。 电沉积涂料组合物是无铅阳离子电沉积涂料组合物,其挥发性有机含量为1重量%以下,金属离子含量为500ppm以下,中和酸量为10〜30mg当量,基于100 g粘合剂树脂固体含量。 中间涂料组合物和/或底涂层组合物包含特定量的作为树脂组分的非水分散体树脂。 在涂布过程中,从常规的中间涂布工艺或常规的基底涂布工艺中省去烘烤步骤。