Non-bleeding indicator and dyes therefor
    2.
    发明授权
    Non-bleeding indicator and dyes therefor 失效
    非止血指标及染料

    公开(公告)号:US4029598A

    公开(公告)日:1977-06-14

    申请号:US807411

    申请日:1969-03-14

    CPC分类号: G01N31/221 C09B62/45

    摘要: In indicators comprising a carrier such as cellulose saturated with one or more azo dyes having reactive groups capable of forming a chemical bond with the carrier material, the improvement wherein the indicator is made non-bleeding by using such dyes which, in addition to the reactive group, contain at least one additional sulfonic acid and/or carboxylic acid group, an example of such a dye being 4-anilino-3'-(2-hydroxysulfonyloxyethylsulfonyl)-azobenzene-6'-carboxylic acid.

    摘要翻译: 在包含诸如纤维素饱和的载体(如具有能与载体材料形成化学键的具有反应性基团的偶氮染料)的指标中,通过使用这样的染料使得该指示剂不渗色,其中除了反应性 基团含有至少一个另外的磺酸和/或羧酸基团,这种染料的实例是4-苯胺基-3' - (2-羟基磺酰氧基乙基磺酰基) - 偶氮苯-6'-羧酸。

    Non-bleeding indicators and dyes therefor used in pH determination
process
    3.
    发明授权
    Non-bleeding indicators and dyes therefor used in pH determination process 失效
    非流血指标和染料用于pH测定过程

    公开(公告)号:US4029597A

    公开(公告)日:1977-06-14

    申请号:US602470

    申请日:1975-08-06

    摘要: In colorimetric indicators comprising a carrier such as cellulose saturated with one or more azo dyes having reactive groups capable of forming a chemical bond with the carrier material, the improvement wherein the indicator is made non-bleeding by using such dyes which, in addition to the reactive group, contain at least one additional sulfonic acid and/or carboxylic acid group, an example of such a dye being 4-anilino-3'-(2-hydroxysulfonyloxyethylsulfonyl)-azobenzene-6'-carboxylic acid.

    摘要翻译: 在包含载体如含有一种或多种具有能与载体材料形成化学键的反应性基团的偶氮染料饱和的载体的比色指示剂中,通过使用这样的染料使指示剂不渗色, 反应性基团,含有至少一个另外的磺酸和/或羧酸基团,这种染料的实例是4-苯胺基-3' - (2-羟基磺酰氧基乙基磺酰基) - 偶氮苯-6'-羧酸。