Water-swellable elastomer composition
    8.
    发明公开
    Water-swellable elastomer composition 失效
    Mit Wasser quellende Elastomermassen

    公开(公告)号:EP0900834A1

    公开(公告)日:1999-03-10

    申请号:EP98102540.6

    申请日:1998-02-13

    摘要: A water-swellable elastomer composition comprising (A) an N-vinylcarboxylic acid amide-base crosslinked resin, (B) a water-swellable urethane obtained by the reaction of a hydrophilic polyol with a polyisocyanate, and (C) an elastomer can retain the stable magnification of swelling with an aqueous solution containing an electrolyte or ion such as acid, alkali and various salts, sea water or cement water, and can be used as a leak-preventive material for a long period of time without undergoing reduction in the water stopping capability.

    摘要翻译: 一种水溶胀性弹性体组合物,其包含(A)N-乙烯基羧酸酰胺基交联树脂,(B)通过亲水性多元醇与多异氰酸酯反应获得的水溶胀性氨酯和(C)弹性体, 用含有电解质或离子如酸,碱和各种盐,海水或水泥水的水溶液稳定放大,可长期用作防渗材料,而不会经历水分的还原 停止能力。

    Improved chelator for anaerobic sealants
    10.
    发明公开
    Improved chelator for anaerobic sealants 失效
    改进的厌氧密封剂的教练

    公开(公告)号:EP0282292A3

    公开(公告)日:1990-03-14

    申请号:EP88302068.7

    申请日:1988-03-10

    IPC分类号: C09K3/10

    摘要: An improved metal ion chelator for use in anaerobic acrylate ester sealants or adhesives is N-hydroxyethylenediaminetriacetic acid trisodium salt (HEDTA Na₃). An anaerobic sealant composition containing N-hydroxyethylenediaminetriacetic acid trisodium salt (HEDTA Na₃) as a chelating agent may comprise between 1 and 1000 ppm but preferably between 25 and 500 ppm of N-hydroxyethylenediamine­triacetic acid trisodium salt. The chelator of the present invention is particularly suitable for counteracting copper contamination in fast-curing sealant formulations having as an accelerator 1-acetyl-­2-phenylhydrazine. Comparative tests with other known chelating agents are described.