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    Blocked leuco dyes for photothermographic elements
    27.
    发明授权
    Blocked leuco dyes for photothermographic elements 失效
    用于光热敏成像元件的封闭无色染料

    公开(公告)号：US5492805A

    公开(公告)日：1996-02-20

    申请号：US269438

    申请日：1994-06-30

    Applicant: Larry R. Krepski ,  Sharon M. Simpson ,  Kim M. Vogel

    Inventor： Larry R. Krepski ,  Sharon M. Simpson ,  Kim M. Vogel

    IPC: G03C8/40 ,  C07C311/60 ,  G03C1/498

    CPC classification number: C07C311/60 ,  G03C1/49854 ,  G03C8/4013 ,  Y10S430/156

    Abstract: A photothermographic element containing a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer is provided. The emulsion layer comprises:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible source of silver;(c) a leuco dye reducing agent; and(d) a binder;wherein the leuco dye reducing agent comprises a blocked leuco dye compound of the general formula L-R.sup.1, which is capable of being oxidized to a colored form, wherein:(i) L is a group remaining after removal of a hydrogen from a leuco dye; and(ii) R.sup.1 is a C(O)--NH--SO.sub.2 --R.sup.5 group wherein R.sup.5 is an aliphatic group or an aromatic group.

    Abstract translation: 提供了含有支持轴承至少一个可热显影的，感光的成像光热敏成像乳剂层的光热敏成像元件。 乳剂层包括：（a）光敏卤化银; （b）非光敏，可还原的银源; （c）无色染料还原剂; 和（d）粘合剂; 其中所述无色染料还原剂包含能够被氧化成着色形式的通式L-R1的封闭无色染料化合物，其中：（i）L是在从无色染料中除去氢后剩余的基团 ; 和（ii）R 1是C（O）-NH-SO 2 -R 5基团，其中R 5是脂族基团或芳族基团。

    Chromogenic leuco redox-dye-releasing compounds for photothermographic elements
    28.
    发明授权
    Chromogenic leuco redox-dye-releasing compounds for photothermographic elements 失效
    用于光热敏成像元件的显色无色氧化还原 - 染料释放化合物

    公开(公告)号：US5492804A

    公开(公告)日：1996-02-20

    申请号：US269400

    申请日：1994-06-30

    Applicant: Raffaella Biavasco ,  Lori S. Harring ,  Larry R. Krepski ,  Daniel E. Mickus ,  Mark B. Mizen ,  Sharon M. Simpson ,  Cristina Soncini ,  Kim M. Vogel

    Inventor： Raffaella Biavasco ,  Lori S. Harring ,  Larry R. Krepski ,  Daniel E. Mickus ,  Mark B. Mizen ,  Sharon M. Simpson ,  Cristina Soncini ,  Kim M. Vogel

    IPC: G03C8/40 ,  C07C275/40 ,  C07C275/42 ,  C07C311/46 ,  G03C1/498

    CPC classification number: C07C275/40 ,  C07C275/42 ,  C07C311/46 ,  G03C1/49854 ,  Y10S430/156

    Abstract: A photothermographic element comprising a support bearing at least one heat-developable, photosensitive, image-forming photothermographic emulsion layer comprising:(a) a photosensitive silver halide;(b) a non-photosensitive, reducible source of silver;(c) a chromogenic leuco dye reducing agent; and(d) a binder;wherein the chromogenic leuco dye reducing agent is a chromogenic leuco redox-dye-releasing compound of the general formula: ##STR1## wherein: (i) Cp is a coupler group;(ii) N--D is a photographic developer group; and(iii) R.sup.1 is a --C(O)--NH--A--Dye group wherein Dye represents the chromophore of a thermally mobile dye; and A represents a single bond or a divalent linking group of the formula --X--R.sup.5 --L--, wherein R.sup.5 is a divalent hydrocarbon chain containing up to 12 carbon atoms, L is a single bond or a divalent group that binds the chromophore of the thermally mobile dye to R.sup.5, and X represents a single bond or an --SO.sub.2 -- group.

    Abstract translation: 一种光热敏成像元件，包括承载至少一个可热显影的，感光的成像光热敏成像乳剂层的支撑体，其包含：（a）感光卤化银; （b）非光敏，可还原的银源; （c）显色无色染料还原剂; 和（d）粘合剂; 其中所述显色无色染料还原剂是通式为：其中：（i）Cp为偶合剂基团的显色无色隐绿色氧化还原 - 染料释放化合物。 （ii）N-D是照相显影剂组; 和（iii）R 1是-C（O）-NH-A-染料基团，其中染料代表热移动染料的发色团; 并且A表示单键或式-X-R5-L-的二价连接基团，其中R 5是含有至多12个碳原子的二价烃链，L是单键或二价基团，其结合 热移动染料至R5，X表示单键或-SO 2 - 基团。

    Yellow and magenta chromogenic leuco dyes for photothermographic elements
    29.
    发明授权
    Yellow and magenta chromogenic leuco dyes for photothermographic elements 失效
    用于光热敏成像元件的黄色和品红色显色无色染料

    公开(公告)号：US5432041A

    公开(公告)日：1995-07-11

    申请号：US161900

    申请日：1993-12-03

    Applicant: Raffaella Biavasco ,  Stefano Parodi ,  Sharon M. Simpson ,  Kim M. Vogel

    Inventor： Raffaella Biavasco ,  Stefano Parodi ,  Sharon M. Simpson ,  Kim M. Vogel

    IPC: G03C8/40 ,  G03C1/498

    CPC classification number: G03C1/49827 ,  G03C1/49854

    Abstract: Photothermographic elements capable of producing a high density yellow or magenta image upon image-wise exposure and thermal development at a relatively low temperature and for a short period of time are described. The photothermographic elements of the invention comprise coated on a support base at least one light-sensitive emulsion layer comprising (a) a leuco dye reducing reducing agent, (b) a photosensitive silver halide, (c) an organic silver compound capable of being reduced by the leuco dye reducing agent, and (d) a binder; wherein the leuco dye reducing agent thereto comprises a chromogenic yellow or magenta leuco dye compound.The photothermographic elements of the invention may be used to obtain yellow and magenta images of suitable density in single color or multicolor photothermographic articles. At the same time the chromogenic leuco dye is stable enough not to be oxidized by oxygen of the air or by simple heating and to limit the fog formation after development.

    Abstract translation: 描述了能够在相对低的温度和短时间内在成像曝光和热显影时产生高密度黄色或品红色图像的光热敏成像元件。 本发明的光热敏成像元件包括在支撑基底上涂覆至少一种感光乳剂层，其包含（a）无色染料还原还原剂，（b）光敏卤化银，（c）能够还原的有机银化合物 通过无色染料还原剂，和（d）粘合剂; 其中所述无色染料还原剂包含显色黄色或品红色无色染料化合物。 本发明的光热敏成像元件可用于获得单色或多色光热成像制品中适合密度的黄色和品红色图像。 同时，显色无色染料足够稳定，不会被空气的氧气或简单的加热氧化，并且限制了显影后的雾形成。

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