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    Process for the electrodeposition of metallic paint films
    1.
    发明授权
    Process for the electrodeposition of metallic paint films 失效
    金属涂膜电沉积工艺

    公开(公告)号：US3616397A

    公开(公告)日：1971-10-26

    申请号：US3616397D

    申请日：1969-10-07

    Applicant: DU PONT

    Inventor： LOHR JAMES E

    IPC: C09C1/64 ,  C09D5/44 ,  B01K5/02 ,  C23B13/00

    CPC classification number: C09D5/448 ,  C01P2004/20 ,  C09C1/644 ,  C09D5/4484

    Abstract: A process for electrocoating a film-forming polymeric composition containing metallic flake particles on the anode of an electrocoating cell is the subject of this invention; the bath utilized in the electrocoating cell comprises a uniformly dispersed film-forming organic polymer which has pendent acid groups and has an acid number of 0.5-300 and is neutralized with a water-soluble compound which is either a metal hydroxide, a water-soluble amine, a water-soluble polyamine, or a watersoluble hydroxy amine, and the bath contains pigment particles of metallic flake which are coated with a thin layer of a crosslinked polymer and have a diameter to thickness ratio of about 40:1 to 1,000:1 and the bath has a pigment to binder ratio of about 1:100 to about 10:100; methods for making the aqueous dispersions for use in the electrocoating bath are also disclosed.

    Process for the removal of ionic contaminants from an electrocoating bath
    3.
    发明授权
    Process for the removal of ionic contaminants from an electrocoating bath 失效
    从电冰箱去除离子污染物的方法

    公开(公告)号：US3671412A

    公开(公告)日：1972-06-20

    申请号：US3671412D

    申请日：1970-04-28

    Applicant: DU PONT

    Inventor： LOHR JAMES E

    IPC: C25D13/24 ,  B01K5/02 ,  C23B13/00

    CPC classification number: C25D13/24

    Abstract: An electrolysis cell for the removal of ionic contaminants from an electrocoating bath and the utilization of this electrolysis cell in an electrocoating process are the subjects of this invention; the electrolysis cell comprises an anode assembly of a frame having attached thereto a metal anode and an anion permeable membrane that is held by the frame in close relationship with the anode and forms a compartment between the membrane and the anode; a cathode is positioned in a close relationship to the anode assembly; the electrocoating bath is brought into contact with the membrane and anionic impurities that are present in the bath migrate toward the anode and are removed from the compartment in the anode assembly; the membrane is impermeable to the film-forming polymeric materials and pigments utilized in the electrocoating bath and is selectively permeable to the water-soluble anionic impurities in the bath; the electrolysis cell can be positioned directly in the electrocoating bath utilized in the electrocoating process or may be positioned outside of the bath and have the bath passed through the electrolysis cell and recycles into the bath. It is also possible to remove cationic contaminants from the bath by using a cation permeable membrane positioned in a cathode assembly similar to the above anode assembly in the electrolysis cell.

    Abstract translation: 用于从电泳浴中除去离子污染物的电解池和在电涂工艺中利用该电解槽是本发明的主题; 该电解槽包括一个框架的阳极组件，该框架具有金属阳极和阴离子可渗透膜，阴离子渗透膜由框架与阳极保持紧密关系，并在隔膜和阳极之间形成隔室; 阴极与阳极组件定位成紧密关系; 使电泳浴与膜接触，并且存在于浴中的阴离子杂质向阳极迁移并从阳极组件中的隔间移除; 该膜对于在电泳浴中使用的成膜聚合物材料和颜料是不可渗透的，并且选择性地渗透浴中的水溶性阴离子杂质; 电解池可以直接放置在电涂覆工艺中使用的电镀浴中，或者可以将其置于浴槽的外部，并使浴液通过电解槽并再循环到浴中。 也可以通过使用位于阴极组件中的阳离子可渗透膜来从浴中除去阳离子污染物，其类似于电解池中的上述阳极组件。

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