Naphthalocyanine compounds
    47.
    发明公开
    Naphthalocyanine compounds 失效
    Naphthalocyaninverbindungen。

    公开(公告)号:EP0134518A1

    公开(公告)日:1985-03-20

    申请号:EP84108500.4

    申请日:1984-07-18

    发明人: Eda, Tsunehito

    IPC分类号: C09B47/067

    CPC分类号: C09B47/045 C09B47/0673

    摘要: @ Naphthalocyanine compounds represented by the general formula
    wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are each a straight chain or branched chain alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe, and Ge, or its oxide, chloride or bromide, are bluish green or green crystals and are superior in absorption of near infrared rays of 750 to 850 nm, highly resistant to light, heat, acids and alkalis, soluble in organic acids, liquid crystals and resins, and accordingly are very useful as a dyestuff capable of absorbing near infrared rays.