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    • 21. 发明授权
    • Dispersions of epoxy scavengers exhibiting improved raw stock keeping
    • 环氧清除剂的分散体表现出改善的原料保存
    • US5620632A
    • 1997-04-15
    • US427763
    • 1995-04-25
    • Krishnan Chari
    • Krishnan Chari
    • C07D303/16C07D303/22C07D303/34C07D303/42C07D303/46C07D405/12C07F5/02C07F9/655G03C1/005G03C7/392B01J13/00C08K5/524C09K15/26
    • C07D303/22C07D303/16C07D303/34C07D303/42C07D303/46C07D405/12C07F5/025C07F9/65502G03C1/005G03C7/39268G03C7/39296Y10S516/928
    • A process for preparing a solid particle dispersion of an epoxy compound of the formula SI, ##STR1## wherein R is H, an alkyl group, or an aryl group; L.sub.1 is an alkylene group or an arylene group; L.sub.2 is --O--, --CO--, --S--, --SO.sub.2 --, --PO.sub.2 --, --CO.sub.2 --, --NHCO-- or --NHSO.sub.2 --, wherein L.sub.2 may be orientated in either direction; L.sub.3 is an alkylene group; m is 0 or 1; p is 0 or 1; and X is ##STR2## wherein R' is H or an alkyl or aryl group, with the proviso that where L.sub.2 comprises an ionizable group, X may also be an alkyl group or an aryl group is disclosed. The process comprising the steps of: (a) forming a coarse aqueous slurry of solid particles of said compound; and (b) milling said slurry in the presence of a hydrophobic, photographically inert, liquid second component which has a logP.sub.(calc) greater than about 6.0 for time sufficient to provide particles of the desired average particle size. Solid particle dispersions of the invention exhibit improved raw stock keeping under conditions of elevated temperatures when incorporated in a photographic element.
    • 一种制备式SI的环氧化合物的固体颗粒分散体的方法,其中R是H,烷基或芳基; L1是亚烷基或亚芳基; L 2是-O-,-CO-,-S-,-SO 2 - , - O 2 - , - CO 2 - , - NHCO-或-NHSO 2 - ,其中L2可以沿任一方向取向; L3是亚烷基; m为0或1; p为0或1; 并且X是,其中R'是H或烷基或芳基,条件是其中L2包含可离子化基团,X也可以是烷基或芳基。 该方法包括以下步骤:(a)形成所述化合物的固体颗粒的粗制含水浆料; 和(b)在疏水的,照相惰性的液体第二组分的存在下研磨所述浆料,其中logP(calc)大于约6.0,足以提供所需平均粒径的颗粒。 当结合到照相元件中时,本发明的固体颗粒分散体显示改善的原料保持在高温条件下。
    • 22. 发明授权
    • Color photographic element having improved image stability
    • 具有改进的图像稳定性的彩色照相元件
    • US5597685A
    • 1997-01-28
    • US429269
    • 1995-04-25
    • Krishnan ChariWendell F. Smith, Jr.
    • Krishnan ChariWendell F. Smith, Jr.
    • C07D303/16C07D303/22C07D303/34C07D303/42C07D303/46C07D405/12C07F5/02C07F9/655G03C1/005G03C7/392G03C1/34G03C7/384
    • C07D303/22C07D303/16C07D303/34C07D303/42C07D303/46C07D405/12C07F5/025C07F9/65502G03C1/005G03C7/39268G03C7/39296
    • Color photographic element comprising residual magenta coupler scavenger ionizable epoxy compounds in combination with a specific class of image stabilizers are disclosed. Such elements comprise a support bearing thereon: (a) a photosensitive first layer comprising (i) a silver halide emulsion, (ii) a magenta coupler dispersion, and (iii) an image stabilizer of the following formula STG-A: ##STR1## wherein R.sub.1 represents an alkyl group, a cycloalkyl group, an alkenyl phenyl group, an aryl group, a heterocyclic group, an acyl group, a bridged hydrocarbon group, an alkyl sulfonyl group or an aryl sulfonyl group; R.sub.2 represents a group capable of being substituted on the benzene ring; r represents an integer between 0 and 4; and A represents a group of non metal atoms necessary for the formation of a 5 to 8 membered ring together with the nitrogen atom; and (b) a second layer comprising a dispersion of an epoxy compound of the structural formula SI: ##STR2## wherein R is H, an alkyl group, or an aryl group; L.sub.1 is an alkyl group or an aryl group; L.sub.2 is --O--, --CO--, --S--, --SO.sub.2 --, --PO.sub.2 --, --CO.sub.2 --, --NHCO-- or --NHSO.sub.2 --, wherein L.sub.2 may be orientated in either direction; L.sub.3 is an alkyl group; m is 0 or 1; p is 0 or 1; and X is ##STR3## wherein R' is H or an alkyl or aryl group, with the proviso that where L.sub.2 comprises an ionizable group, X may also be an alkyl group or an aryl group. The photographic elements of the invention exhibit inhibited thermal and photochemical yellowing.
    • 公开了包含残留品红成色剂清除剂可离子化环氧化合物与特定类型的图像稳定剂组合的彩色照相元件。 这样的元件包括其上的支撑轴承:(a)光敏第一层,其包含(i)卤化银乳剂,(ii)品红色成色剂分散体,和(iii)下式STG-A的图像稳定剂: STG-A,其中R1表示烷基,环烷基,烯基苯基,芳基,杂环基,酰基,桥连烃基,烷基磺酰基或芳基磺酰基; R2表示能够在苯环上被取代的基团; r表示0〜4的整数。 A表示与氮原子一起形成5至8元环所必需的一组非金属原子; 和(b)包含结构式SI的环氧化合物的分散体的第二层:其中R是H,烷基或芳基; L1是烷基或芳基; L 2是-O-,-CO-,-S-,-SO 2 - , - O 2 - , - CO 2 - , - NHCO-或-NHSO 2 - ,其中L2可以沿任一方向取向; L3是烷基; m为0或1; p为0或1; 并且X是,其中R'是H或烷基或芳基,条件是其中L 2包含可离子化基团,X也可以是烷基或芳基。 本发明的照相元件表现出抑制的热和光化学黄变。
    • 24. 发明授权
    • Sensitized photochemical switching for cholesteric liquid crystal displays
    • 用于胆甾型液晶显示器的敏化光化学切换
    • US07563389B2
    • 2009-07-21
    • US12331827
    • 2008-12-10
    • Deepak ShuklaKrishnan Chari
    • Deepak ShuklaKrishnan Chari
    • C09K19/36C09K19/52C09K19/54C09K19/58G02F1/13G03F1/02G03F7/004
    • C09K19/586C09K19/588Y10T428/10Y10T428/1036Y10T428/1055
    • The present invention relates to photo-tunable dopant compositions comprising a photo-reactive chiral compound capable of undergoing a photochemical reaction resulting in the loss of chirality, and a triplet sensitizer. The present invention also relates to a display comprising a substrate, a liquid crystalline layer thereon, wherein the liquid crystalline layer comprises a nematic host, at least one chiral dopant, a photo-reacted compound, and a triplet sensitizer, and at least one transparent conductive layer. The present invention also relates to a method of tuning a cholesteric liquid crystal material comprising providing at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound; combining the at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound to form a mixture; and irradiating the mixture for a period of time.
    • 本发明涉及光可掺杂掺杂剂组合物,其包含能够经历导致手性丧失的光化学反应的光反应性手性化合物和三线态敏化剂。 本发明还涉及一种显示器,其包括基底,其上的液晶层,其中所述液晶层包括向列型主体,至少一种手性掺杂剂,光反应化合物和三线态敏化剂,以及至少一种透明 导电层。 本发明还涉及一种调节胆甾型液晶材料的方法,包括提供至少一种介晶化合物,至少一种三线态敏化剂和至少一种光反应性手性化合物; 组合所述至少一种介晶化合物,至少一种三线态敏化剂和至少一种光反应性手性化合物以形成混合物; 并将混合物照射一段时间。
    • 27. 发明申请
    • Sensitized photochemical switching for cholesteric liquid crystal displays
    • 用于胆甾型液晶显示器的敏化光化学切换
    • US20070243342A1
    • 2007-10-18
    • US11403970
    • 2006-04-13
    • Deepak ShuklaKrishnan Chari
    • Deepak ShuklaKrishnan Chari
    • C09K19/52C09K19/58C09K19/54C09K19/36
    • C09K19/586C09K19/588Y10T428/10Y10T428/1036Y10T428/1055
    • The present invention relates to photo-tunable dopant compositions comprising a photo-reactive chiral compound capable of undergoing a photochemical reaction resulting in the loss of chirality, and a triplet sensitizer. The present invention also relates to a display comprising a substrate, a liquid crystalline layer thereon, wherein the liquid crystalline layer comprises a nematic host, at least one chiral dopant, a photo-reacted compound, and a triplet sensitizer, and at least one transparent conductive layer. The present invention also relates to a method of tuning a cholesteric liquid crystal material comprising providing at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound; combining the at least one mesogenic compound, at least one triplet sensitizer, and at least one photo-reactive chiral compound to form a mixture; and irradiating the mixture for a period of time.
    • 本发明涉及光可掺杂掺杂剂组合物,其包含能够经历导致手性丧失的光化学反应的光反应性手性化合物和三线态敏化剂。 本发明还涉及一种显示器,其包括基底,其上的液晶层,其中所述液晶层包括向列型主体,至少一种手性掺杂剂,光反应化合物和三线态敏化剂,以及至少一种透明 导电层。 本发明还涉及一种调节胆甾型液晶材料的方法,包括提供至少一种介晶化合物,至少一种三线态敏化剂和至少一种光反应性手性化合物; 组合所述至少一种介晶化合物,至少一种三线态敏化剂和至少一种光反应性手性化合物以形成混合物; 并将混合物照射一段时间。