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    • 5. 发明授权
    • Novel disazo compounds, process for the preparation of same and
application of said disazo compounds and analogues thereof to
electrophotographic sensitive materials
    • 新型双偶氮化合物,其制备方法和所述双偶氮化合物及其类似物应用于电子照相感光材料
    • US4251614A
    • 1981-02-17
    • US921086
    • 1978-06-30
    • Masaomi SasakiKiyoshi SakaiMitsuru HashimotoMasafumi OhtaKyoji Tsutsui
    • Masaomi SasakiKiyoshi SakaiMitsuru HashimotoMasafumi OhtaKyoji Tsutsui
    • C09B35/34G03G5/06
    • C09B35/34G03G5/0683G03G5/0685
    • The present invention provides disazo compounds expressed by the general formula: ##STR1## [wherein A represents a member selected from the group consisting of ##STR2## (wherein X represents a member selected from the group consisting of aromatic rings such as benzene ring, naphthalene ring, etc., hetero rings such as indole ring, carbazole ring, benzofuran ring, etc. and their substituents, Ar.sub.1 represents a member selected from the group consisting of aromatic rings such as benzene ring, naphthalene ring, etc., hetero rings such as dibenzofuran ring, etc. and their substituents, Ar.sub.2 and Ar.sub.3 represent a member selected from the group consisting of aromatic rings such as benzene ring, naphthalene ring, etc. and their substituents, R.sub.1 and R.sub.3 represent a member selected from the group consisting of hydrogen, lower alkyl radical or phenyl radical and their substituents and R.sub.2 represents a member selected from the group consisting of lower alkyl radical, carboxyl radical and their esters)]; a process for the preparation of said compounds; and electrophotographic sensitive materials having a high sensitivity as well as a high flexibility which comprise a conductive support and a photosensitive layer formed thereon, said photosensitive layer containing said disazo compound as an effective ingredient.
    • 本发明提供由以下通式表示的双偶氮化合物:其中A表示选自下列的成员:其中X表示选自以下的成员:芳环如 苯环,萘环等杂环,吲哚环,咔唑环,苯并呋喃环等杂原子及其取代基,Ar 1表示选自苯环,萘环等芳香环的成员 ,诸如二苯并呋喃环等杂环及其取代基,Ar2和Ar3表示选自芳环如苯环,萘环等的基团及其取代基,R 1和R 3表示选自 由氢,低级烷基或苯基组成的组和它们的取代基,R 2表示选自低级烷基,羧基和 酯)]; 一种制备所述化合物的方法; 和具有高灵敏度的电子照相感光材料以及包含导电性支持体和形成在其上的感光层的高柔性,所述感光层含有所述双偶氮化合物作为有效成分。
    • 10. 发明授权
    • Reversible theromosensitive coloring recording method, recording medium
and recording apparatus for the recording method
    • 可逆热敏着色记录方法,记录介质和用于记录方法的记录装置
    • US5552364A
    • 1996-09-03
    • US28229
    • 1993-03-09
    • Kyoji TsutsuiTakehito Yamaguchi
    • Kyoji TsutsuiTakehito Yamaguchi
    • B41J2/32B41M5/28B41M5/34
    • B41M5/34B41J2/32B41M5/28
    • A reversible thermosensitive coloring recording method for producing multi-color images by use of a reversible thermosensitive coloring recording medium which is composed of a support and a reversible thermosensitive coloring recording layer containing a plurality of reversible thermosensitive coloring compositions, each coloring composition being independently present separated from the other coloring compositions, and capable of reversibly forming a color development state with a different color in a predetermined color development temperature range, and a decolorization state in a predetermined decolorization temperature range by the application of heat thereto and maintaining the above two states at room temperature, the decolorization temperature range being located lower in terms of temperature than the color development temperature range therefor, comprises the steps of: temporarily applying heat to the recording medium to a color development temperature at which at least two of the coloring compositions are colored or to a temperature higher than the color development temperature to obtain a mixed coloring state, and decolorizing at least one of the coloring compositions which have been colored, thereby producing multi-color images.
    • 一种可逆热敏着色记录方法,用于通过使用由支持体和包含多个可逆热敏着色组合物的可逆热敏着色记录层组成的可逆热敏着色记录介质来生产多色图像,每个着色组合物独立存在分离 并且能够在预定的显色温度范围内可逆地形成具有不同颜色的显色状态,并且通过施加热量使预定的脱色温度范围内的脱色状态保持在上述两种状态 在室温下,脱色温度范围位于比显色温度范围低的温度范围内,包括以下步骤:暂时向记录介质施加热量至显色温度 着色组合物着色或高于显色温度的温度以获得混合着色状态,并使着色组合物中的至少一种脱色,从而产生多色图像。