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10 条记录 (耗时 0.009 秒)

    Manufacture and application of special pigments suited for the coloring of rubber
    8.
    发明授权
    Manufacture and application of special pigments suited for the coloring of rubber 失效
    适用于橡胶着色的特殊颜料的制造和应用

    公开(公告)号：US1978197A

    公开(公告)日：1934-10-23

    申请号：US30887428

    申请日：1928-09-27

    申请人： ICI LTD

    发明人： JAMES HAILWOOD ANTHONY ,  SMITH NAUNTON WILLIAM JOHNSON ,  ARNOLD SHEPHERDSON

    IPC分类号： C09B67/28 ,  D06P3/79

    CPC分类号： D06P3/793 ,  C09B67/0077

    摘要： 334,688. Imperial Chemical Industries, Ltd., Hailwood, A. J., Naunton, W. J. S., Stewart, A., and Shepherdson, A. Aug 15, 1929. Addition to 304,376. Indiarubber, guttapercha, and balata, colouring; dye preparations; lakes.-The pigments used for colouring rubber by the process of the parent Specification are prepared by coating the filler with the vat dye by oxidizing an alkaline solution or suspension of the Leuco compound of the vat dye in the presence of the filler, the latter being treated, before or after the incorporation of the dye, with a soap. The resulting pigments, containing soap, give brighter shades when used in a rubber mix, than those prepared without the use of soap. In an example, a pigment is prepared by boiling magnesium carbonate with soap solution, filtering, suspending the solid residue in a solution of leuco duranthrene brilliant blue R. made by vatting the dyestuff with caustic alkali and hydrosulphite, again filtering and drawing air through the filter cake to complete the oxidation of the leuco compound.