Benzidine yellow type pigment
    3.
    发明授权
    Benzidine yellow type pigment 失效
    BENZIDINE黄色颜料

    公开(公告)号:US3719658A

    公开(公告)日:1973-03-06

    申请号:US3719658D

    申请日:1969-03-12

    申请人: HERCULES INC

    发明人: CONLEY J

    IPC分类号: C09B35/10 C09B35/24 C09D11/16

    CPC分类号: C09B35/105

    摘要: IS PRODUCED BY TETRAZOTIZING 3,3'',5,5''-TETRACHLOROBENZIDINE AND THEN COUPLING THE TETRAZOTIZED PRODUCT WITH ACETO-ACET-OPHENETIDIDE. In a preferred method N,N''-diacetyl-3,3'',5,5''tetrachlorobenzidine is hydrolyzed to the corresponding amine in situ in the acid solution which is to be used for the tetrazotizing step.

    A benzidine yellow type pigment of unusually good lightfastness and superior strength is described. The pigment, which is a compound of the formula

    Optical information recording medium using bisazo or trisazo compounds
    9.
    发明授权
    Optical information recording medium using bisazo or trisazo compounds 失效
    使用双偶氮或三偶氮化合物的光学信息记录介质

    公开(公告)号:US5441844A

    公开(公告)日:1995-08-15

    申请号:US185778

    申请日:1994-01-24

    申请人: Masakatsu Shimoda

    发明人: Masakatsu Shimoda

    摘要: Bisazo compounds of formula (I), an intermediate for producing the bisazo compound of formula (I), and trisazo compounds of formula (II) for use in optical information recording media, and methods of producing these compounds are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 20 carbon atoms; an aryl group selected from the group consisting of phenyl group, naphthyl group, mesityl group, and tri-t-butyl phenyl group; an alkoxyl group having 1 to 4 carbon atoms; a nitro group; a cyano group; chlorine; or bromine; n is an integer of 1, 2, or 3, and C.sub.p represents a coupler residue.

    摘要翻译: 公开了式(I)的双偶氮化合物,用于制备式(I)的双偶氮化合物的中间体和用于光学信息记录介质的式(II)的三偶氮化合物及其制备方法:< IMAGE& I)其中R表示氢,具有1至20个碳原子的烷基;(II)其中R表示氢, 选自苯基,萘基,均三甲基和三叔丁基苯基的芳基; 具有1至4个碳原子的烷氧基; 硝基; 氰基; 氯; 或溴; n是1,2或3的整数,Cp表示成色剂残基。