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    Stabilization of acidic aqueous coating compositions containing an organic coating-forming material
    1.
    发明授权
    Stabilization of acidic aqueous coating compositions containing an organic coating-forming material 失效
    含有机涂层材料的酸性水性涂料组合物的稳定性

    公开(公告)号：US3839097A

    公开(公告)日：1974-10-01

    申请号：US30817672

    申请日：1972-11-20

    Applicant: AMCHEM PROD

    Inventor： HALL W ,  LEISTER H

    IPC: B05D7/14 ,  C09D5/00 ,  C09D5/08 ,  C09D7/00 ,  C23F7/00 ,  B44D1/098

    CPC classification number: C09D7/00 ,  B05D7/142 ,  C09D5/00

    Abstract: An acidic aqueous coating composition containing an organic coating-forming material forms on a metallic surface immersed therein a coating, the weight or thickness of which is related to the time the surface is immersed in the composition. The coating composition, which tends to become unstable as a result of the build up of metal ions in the composition, is stabilized by removing the metal ions with an ion exchange material. Also, in maintaining stability, anionic and/or nonionic surfactants or dispersing agents, which are present in the composition to disperse the organic-coating forming material, are added to the composition in an amount in excess of that which is added to replenish the organic coating-forming material as it is consumed during use. Also, coating compositions treated with the ion exchange material tend to produce coatings which have a textured or grainy appearance. The texturing of coatings can be avoided by contacting the coating composition with the ion exchange material in the presence of a cationic surfactant or an amphoteric surfactant which has cationic properties in the acidic aqueous coating composition, or other material which maintains the relatively small particles of the organic coating-forming material in the composition.

    Abstract translation: 含有有机涂层形成材料的酸性水性涂料组合物在浸入其中的金属表面上形成，其重量或厚度与表面浸入组合物中的时间有关。 通过用离子交换材料去除金属离子来稳定由于组合物中金属离子的积聚而倾向于变得不稳定的涂料组合物。 此外，为了保持稳定性，存在于组合物中以分散有机涂层形成材料的阴离子和/或非离子表面活性剂或分散剂以超过加入有机涂层形成材料的量加入组合物中以补充有机涂层形成材料 涂料形成材料在使用时消耗。 此外，用离子交换材料处理的涂料组合物倾向于产生具有纹理或颗粒状外观的涂层。 可以通过在阳离子表面活性剂或两性表面活性剂的存在下将涂料组合物与离子交换材料接触来避免涂层的变形，所述阳离子表面活性剂或在酸性水性涂料组合物中具有阳离子性质的两性表面活性剂，或其它保持相对较小颗粒的材料 组合物中的有机涂层形成材料。

    10.
    发明专利
    未知

    公开(公告)号：BR7808610A

    公开(公告)日：1979-08-28

    申请号：BR7808610

    申请日：1978-12-28

    Applicant: AMCHEM PROD

    Inventor： HALL W ,  DONOVAN J ,  LEISTER H

    IPC: B05D7/14 ,  C09D5/08 ,  C23F5/00

    Abstract: An autodepositing coating process wherein a coating bath containing an acidic aqueous coating composition comprising as essential ingredients: (1) an acid; (2) an oxidizing agent; and (3) an aqueous dispersion of coating forming resin particles and surfactant, which surfactant is subject to being slowly altered by the acidic oxidizing environment in the metal coating bath resulting in the buildup of reaction products in the bath, which bath is maintained in continuous coating forming operability by replenishing in a manner which prevents the deterioration of the coating quality of the bath. The coating composition and replenishing composition may also contain as an optional ingredient an aqueous dispersion of pigment and surfactant and may also contain non-essential ingredients, which non-essential ingredients may increase in concentration as the bath is operated until a deleterious effect is asserted on the coating formation. The coating quality of the replenished bath is maintained by the addition of an aqueous surfactant composition and by operating the replenished bath at an elevated redox potential or by removal of the altered surfactant.

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