Ferromagnetic chromium dioxide crystals and magnetic recording medium containing same
    1.
    发明授权
    Ferromagnetic chromium dioxide crystals and magnetic recording medium containing same 失效
    含铬二氧化铬的晶体和磁记录介质

    公开(公告)号:US3841907A

    公开(公告)日:1974-10-15

    申请号:US24527172

    申请日:1972-04-18

    Applicant: BASF AG

    CPC classification number: G11B5/70636 C01G37/02

    Abstract: The invention relates to ferromagnetic chromium dioxide crystals which are particularly suitable as magnetic pigments for magnetic recording media and which are stabilized by sparingly watersoluble metal compounds whose cations form sparingly watersoluble metal chromates (such as lead hydroxide, barium phosphate, lead silicate and calcium sulfate) applied to, and particularly precipitated onto, the surface thereof, and to a process for their production.

    Abstract translation: 本发明涉及铁磁性二氧化铬晶体,其特别适用于磁记录介质的磁性颜料,并且其由阳离子形成微水溶性金属铬酸盐(例如氢氧化铅,磷酸钡,硅酸铅)的微溶于水的金属化合物稳定化 和硫酸钙),并且特别沉淀在其表面上,以及其制备方法。

    Ferromagnetic chromium dioxide crystals
    2.
    发明授权
    Ferromagnetic chromium dioxide crystals 失效
    氟化铬二氧化物晶体

    公开(公告)号:US3769087A

    公开(公告)日:1973-10-30

    申请号:US3769087D

    申请日:1972-04-18

    Applicant: BASF AG

    Abstract: The invention relates to ferromagnetic chromium dioxide crystals which are particularly suitable as magnetic pigments for magnetic recording media and whose surface, for the purpose of stabilization, is protected with antimony or arsenic compounds which are sparingly soluble in water, and to a process for the production of chromium dioxide crystals thus stabilized by the precipitation of antimony or arsenic compounds which are sparingly soluble in water.

    Abstract translation: 本发明涉及铁磁二氧化铬晶体,其特别适用于磁记录介质的磁性颜料,其表面为稳定目的而用微溶于水的锑或砷化合物进行保护,以及生产方法 的二氧化铬晶体,通过沉淀出微溶于水的锑或砷化合物稳定。

    8.
    发明专利
    未知

    公开(公告)号:DK95377A

    公开(公告)日:1977-09-07

    申请号:DK95377

    申请日:1977-03-04

    Applicant: BASF AG

    Abstract: Wood preservatives for protecting wood or wood-base materials against animal pests, and which contain a perfluoroalkane sulfonate of the formula C nF2n+1-SO3 M where n is one of the integers from 1-14 and M denotes hydrogen or a cation, and a process for protecting wood or wood-base materials against animal pests with these compounds.

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