公开(公告)号：US5536630A

公开(公告)日：1996-07-16

申请号：US312204

申请日：1994-09-26

申请人： Pranab Bagchi ,  Melvin D. Sterman ,  Jacob I. Cohen

发明人： Pranab Bagchi ,  Melvin D. Sterman ,  Jacob I. Cohen

IPC分类号： C08H1/06 ,  C09H7/00 ,  G03C1/047 ,  G03C1/005

CPC分类号： G03C1/047 ,  C08H1/06 ,  C09H7/00 ,  G03C2001/0471

摘要： The invention provides a method of nucleating silver halide particles wherein said nucleation is carried out in the presence of acid processed ossein (APO) gelatin or chain-extended acid processed ossein (CE-APO) gelatin and the composition formed therefrom.

摘要翻译： 本发明提供了一种成核卤化银颗粒的方法，其中所述成核在酸处理的骨胶原（APO）明胶或链延长的酸处理的骨胶质素（CE-APO）明胶及其形成的组合物存在下进行。

公开(公告)号：US5393650A

公开(公告)日：1995-02-28

申请号：US265997

申请日：1994-06-27

申请人： Pranab Bagchi ,  Melvin M. Kestner

发明人： Pranab Bagchi ,  Melvin M. Kestner

IPC分类号： G03C1/04 ,  G03C1/043 ,  G03C1/38 ,  G03C1/76 ,  G03C1/95

CPC分类号： G03C1/95 ,  G03C1/38

摘要： This invention describes the use of surfactants of the following types:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycidyl ether groups that may or may not be terminated with a negative charge such as a sulfate group.Type B--Block oligomeric surfactants comprising hydrophobic polyoxypropylene blocks (A) and hydrophilic polyoxyethylene blocks (B) joined in the manner of A--B--A, B--A--B, A--B, (A--B.sub.n .tbd.G.tbd.(B--A).sub.n, or (B--A).sub.n .tbd.G(A--B).sub.n, where G is a connective organic moiety and n is between 1 and 3.Type C--Sugar surfactants, comprising between one to three 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic mono or oligosaccharidic chains that may or may not be terminated by a negatively charged group such as a sulfate group.in combination with gelatin-grafted-polymer particles to obtain aggregation and defect free photographic multilayer coatings that are considerably low in pressure sensitivity.

摘要翻译： 本发明描述了以下类型的表面活性剂的用途：A型表面活性剂，其包含6至22个碳原子的疏水尾部，其具有一个或多个附着的亲水链，其包含至少8个氧化乙烯和/或缩水甘油醚基团，其可以或可以不以 负电荷如硫酸根组。 包含以ABA，BAB，AB，（A-Bn 3BOND G 3BOND（BA）n或（BA）n 3BOND G）的方式连接的疏水性聚氧丙烯嵌段（A）和亲水性聚氧乙烯嵌段（B）的B型低聚表面活性剂 （AB）n，其中G是连接性有机部分，n在1和3之间。C型糖表面活性剂，包含1至3个6至22个碳原子的疏水尾部与一个或多个连接的亲水单糖或寡糖链， 或者可能不被带负电荷的基团如硫酸根基团终止，与明胶接枝聚合物颗粒组合以获得相当低的压敏度的聚集和无缺陷的照相多层涂层。

公开(公告)号：US5252425A

公开(公告)日：1993-10-12

申请号：US746544

申请日：1991-08-19

申请人： Pranab Bagchi

发明人： Pranab Bagchi

IPC分类号： B41M5/382 ,  B41M5/34 ,  G03F3/10 ,  G03F7/004 ,  G03F7/40 ,  G03C5/54 ,  G03C1/68

CPC分类号： G03F3/10 ,  B41M5/345 ,  Y10S430/163

摘要： This invention relates to a full-color hard copy imaging system and a process, where a multiply photosensitive donor sheet, comprising clear polymeric or an opaque paper base, coated sequentially with a first layer of patches of a cyan, a magenta, and a yellow dye, that are thermally diffusible, with a second layer also coated sequentially with patches of a red light sensitive, a green light sensitive or a blue light sensitive, negative or a positive working photoresist layer, in such a manner that each of the colored dye patches are in registry with their complementary color sensitive photoresist patches, is exposed with white light sequentially, three times in registry on the three primary light sensitive patches, through a multicolor image (a positive transparency or a photographic negative), to produce crosslinks, image wise, in the exposed areas in the case of the negative resist system, or to uncrosslink the resist structure image wise in the exposed areas for a positive working resist system. In the second step, the first color patch is laminated on to a receiver sheet that is composed of a clear plastic layer in which the chromogenic dyes are soluble, with or without a white reflective backing and the first color image is transferred to the receiver sheet by thermal evaporation. The image is formed due to the hindrance of diffusion of dye in the crosslinked regions of the resist layer in the donor sheet. In subsequent consecutive steps the two remaining color images are transferred, by similar thermal process in registry on to the receiver sheet, thereby forming a full-color image of the original image.

摘要翻译： 本发明涉及一种全色硬拷贝成像系统和一种方法，其中包括透明聚合物或不透明纸基的多次感光供体片，其顺序地涂覆有青色，品红色和黄色的第一层贴片 染料，其具有热扩散性，第二层依次涂覆有红色光敏感，绿色光敏感或蓝色光敏感，负性或正性光致抗蚀剂层的贴片，使得每种着色染料 贴片与其互补的色彩敏感的光刻胶贴片注册，通过多色图像（正透明度或照相底片）依次曝光三次在三个主要光敏贴片上注册，以产生交联，图像 在阴性抗蚀剂体系的情况下的暴露区域中，或者在曝光区域中将抗蚀剂结构图像未交叉显影以进行正面工作 抗蚀系统 在第二步骤中，将第一色块层压到由可见发色染料的透明塑料层组成的接收片上，具有或不具有白色反射背衬，并将第一彩色图像转印到接收片 通过热蒸发。 由于染料在供体片中的抗蚀剂层的交联区域中扩散的阻碍而形成图像。 在随后的连续步骤中，通过类似的热处理将两个剩余的彩色图像转印到接收片上，从而形成原始图像的全色图像。

公开(公告)号：US5248558A

公开(公告)日：1993-09-28

申请号：US718489

申请日：1991-06-20

申请人： Pranab Bagchi ,  William L. Gardner

发明人： Pranab Bagchi ,  William L. Gardner

IPC分类号： G03C1/047 ,  G03C1/053 ,  G03C1/95

CPC分类号： G03C1/95 ,  G03C1/047 ,  G03C1/053 ,  Y10T428/2989 ,  Y10T428/2991 ,  Y10T428/2998

摘要： It has been shown by Photon Correlation Spectroscopy than when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer particles can act as highly elastic stress absorbing fillers. This is because the dry case-hardened shell is expected to form a thin hard shell around the soft polymer particles. It is shown that gelatin-grafted soft polymer particles and case-hardened gelatin-grafted soft polymer particles, incorporated in the emulsion layers of pressure sensitive photographic products, produce coatings with highly reduced pressure sensitivity without any developability or delamination concerns. In this invention the case-hardened gelatin-grafted polymer particles are preferred over the simple gelatin-grafted material. The core polymer particle can have diameters anywhere between 10 to 10.sup.8 nm with a monolayer of gelatin shell that is chemically bonded to its surface and the gelatin shell is further cross-linked with each other to hydrated thicknesses of between 5 to 20 nm.

摘要翻译： 通过光子相关光谱显示，当将额外的固化剂加入到饱和的凝胶接枝聚合物颗粒中时，凝胶层由于硬化而收缩，因为溶液中不存在游离凝胶。 在膜中，这种表面硬化的明胶接枝的软聚合物颗粒可以用作高弹性应力吸收填料。 这是因为干燥壳体硬化壳体预期在软聚合物颗粒周围形成薄的硬壳。 显示出掺入压敏照相产品的乳剂层中的明胶接枝的软聚合物颗粒和表面硬化的明胶接枝的软聚合物颗粒产生具有高度降低的压力敏感性的涂层，而没有任何显影性或分层问题。 在本发明中，表面硬化的明胶接枝聚合物颗粒优于简单的明胶接枝材料。 核心聚合物颗粒的直径可以在10至108nm之间，单层明胶壳化学键合到其表面，明胶壳体进一步交联，水合厚度在5至20nm之间。

公开(公告)号：US5158863A

公开(公告)日：1992-10-27

申请号：US649515

申请日：1991-02-01

申请人： Pranab Bagchi ,  James T. Beck ,  Lia A. Crede

发明人： Pranab Bagchi ,  James T. Beck ,  Lia A. Crede

IPC分类号： G03C1/005

CPC分类号： G03C1/005 ,  Y10S516/04

摘要： The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.

摘要翻译： 本发明通过提供水和表面活性剂的第一流，包含溶剂，碱和照相材料的第二流，并混合所述第一和第二料流，并同时或紧随其后中和所述料流以防止可水解表面活性剂的水解， /或中和前颗粒的过早沉淀。 然后可以将物流立即处理以形成照相材料。 在优选的方法中，可以在混合器之前立即将第一和第二物流直接加入到混合器中以中和细颗粒的分散体。

公开(公告)号：US4990431A

公开(公告)日：1991-02-05

申请号：US297005

申请日：1989-01-17

申请人： Pranab Bagchi ,  James T. Beck ,  Lia A. Crede

发明人： Pranab Bagchi ,  James T. Beck ,  Lia A. Crede

IPC分类号： G03C7/26 ,  G03C1/005 ,  G03C1/015 ,  G03C1/06 ,  G03C7/30 ,  G03C7/32 ,  G03C7/36 ,  G03C7/388

CPC分类号： G03C1/005

摘要： The invention is performed by providing a first flow of water and surfactant, a second flow comprising solvent, base and photographic material, and mixing said first and second streams and either simultaneously or immediately following thereof neutralizing said streams to prevent hydrolysis of a hydrolyzable surfactant and/or premature precipitation of particles before neutralization. The streams then may be immediately treated for formation into photographic materials. In a preferred method the first and second stream may be brought together immediately prior to a mixer with addition of acid directly into the mixer to neutralize the dispersion of fine particles.

摘要翻译： 本发明通过提供水和表面活性剂的第一流，包含溶剂，碱和照相材料的第二流，并混合所述第一和第二料流，并同时或紧随其后中和所述料流以防止可水解表面活性剂的水解， /或中和前颗粒的过早沉淀。 然后可以将物流立即处理以形成照相材料。 在优选的方法中，可以在混合器之前立即将第一和第二物流直接加入到混合器中以中和细颗粒的分散体。

公开(公告)号：US5916358A

公开(公告)日：1999-06-29

申请号：US777133

申请日：1996-12-30

申请人： Pranab Bagchi ,  Ravi Sharma ,  Constance N. Anagnostopoulos ,  Gilbert A. Hawkins ,  John A. Lebens ,  Thierry Vachette ,  James M. Chwalek ,  David S. Ross

发明人： Pranab Bagchi ,  Ravi Sharma ,  Constance N. Anagnostopoulos ,  Gilbert A. Hawkins ,  John A. Lebens ,  Thierry Vachette ,  James M. Chwalek ,  David S. Ross

IPC分类号： C09D11/00 ,  C09D11/02

CPC分类号： C09D11/38

摘要： The invention is related to an aqueous ink composition comprising water, a coloring agent, and solid surfactant particles wherein said solid particles comprise a mixture of at least two surfactants with very low water solubility and with melting points between 40.degree. C. and 90.degree. C.

摘要翻译： 本发明涉及包含水，着色剂和固体表面活性剂颗粒的水性油墨组合物，其中所述固体颗粒包含至少两种具有非常低水溶性的表面活性剂和40℃至90℃之间的熔点的混合物 。

公开(公告)号：US5665331A

公开(公告)日：1997-09-09

申请号：US370998

申请日：1995-01-10

申请人： Pranab Bagchi ,  Raymond P. Scaringe ,  H. William Bosch

发明人： Pranab Bagchi ,  Raymond P. Scaringe ,  H. William Bosch

IPC分类号： A61K9/14 ,  A61K49/04

CPC分类号： B82Y5/00 ,  A61K49/0485 ,  A61K9/145 ,  Y10S977/745 ,  Y10S977/881 ,  Y10S977/915 ,  Y10S977/927 ,  Y10S977/928

摘要： This invention describes the coprecipitation of nanoparticulate pharmaceutical agent dispersion via a process that comprises the dissolution of the said pharmaceutical agent in combination with a crystal growth modifier (CGM) in an alkaline solution and then neutralizing the said solution with an acid in the presence of suitable surface-modifying surface-active agent or agents to form a fine particle dispersion of the said pharmaceutical agent, followed by steps of diafiltration clean-up of the dispersion and then concentration of it to a desired level. This process of dispersion preparation leads to microcrystalline particles of Z-average diameters smaller than 400 nm as measured by photon correlation spectroscopy. Various modification of precipitation schemes are described, many of which are suitable for large-scale manufacture of these agent dispersions. It has been discovered that coprecipitation with CGM leads to smaller particle size compared to a case where precipitation is carried out using the pharmaceutical agent alone. Thus, this dispersion of instant invention is expected to have greater bioavailability. The CGM compound is a compound that has at least about 75% of its chemical structure identical to that of the pharmaceutical agent.

摘要翻译： 本发明描述了纳米颗粒药剂分散体的共沉淀，该方法包括在碱性溶液中将所述药剂与晶体生长调节剂（CGM）组合溶解，然后在适当的存在下用酸中和所述溶液 表面改性表面活性剂或试剂以形成所述药剂的细颗粒分散体，然后将分散体进行渗滤清洗，然后将其浓缩至期望水平。 这种分散制备过程导致通过光子相关光谱测量的Z平均直径小于400nm的微晶颗粒。 描述了各种改性的沉淀方案，其中许多适用于这些试剂分散体的大规模制造。 已经发现，与仅使用药剂进行沉淀的情况相比，CGM的共沉淀导致较小的粒度。 因此，本发明的这种分散体预期具有更大的生物利用度。 CGM化合物是其化学结构的至少约75％与药剂相同的化合物。

公开(公告)号：US5565309A

公开(公告)日：1996-10-15

申请号：US292646

申请日：1994-08-18

申请人： Pranab Bagchi ,  Vincent J. Flow, III ,  Alberto M. Martinez

发明人： Pranab Bagchi ,  Vincent J. Flow, III ,  Alberto M. Martinez

IPC分类号： G03C1/06 ,  B01D3/12 ,  G03C1/00 ,  G03C1/005 ,  G03C7/32 ,  G03C7/388 ,  G03C5/18 ,  G03C5/26

CPC分类号： G03C1/005 ,  G03C1/002 ,  G03C7/388

摘要： The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable. The dispersions of this invention are prepared by mechanical milling or homogenization procedures.

摘要翻译： 本发明通过用一层适用的氧阻隔聚合物如聚乙烯醇（PVA）包围每个颗粒，在单个成色剂或其它照相活性颗粒周围产生选择性氧气屏障，聚乙烯醇（PVA）也将作为颗粒聚结的空间屏障。 用这种材料形成的摄影产品更稳定染料。 本发明的分散体通过机械研磨或均化程序制备。

公开(公告)号：US5491052A

公开(公告)日：1996-02-13

申请号：US477723

申请日：1995-06-07

申请人： James P. Van Meter ,  Pranab Bagchi ,  Brian Thomas ,  Thomas A. Rosiek

发明人： James P. Van Meter ,  Pranab Bagchi ,  Brian Thomas ,  Thomas A. Rosiek

IPC分类号： G03C7/388 ,  G03C7/396

CPC分类号： G03C7/3882 ,  G03C1/38 ,  G03C2200/48 ,  Y10S430/136

摘要： It has been discovered that when polyalkylene oxide compounds or block polymeric or block oligomeric surface active compounds comprising at least a polyoxypropylene (POP) block and a polyoxyethylene (POE) block are added to conventional dispersions of yellow couplers (that is dispersions in which the dispersed particles have a particle size of 0.1 to 0.6 .mu.m), such dispersions in a coated silver halide photographic element produce substantially higher dye yield compared to the conventional dispersion without any additive. Further, the yellow dye formed from such dispersions containing the addenda of this invention are substantially more light stable compared to dispersions that does not contain such addenda.The invention is carried out just by adding required amounts of the said polyoxyethylene (POE)--polyoxypropylene (POP) compound to a preformed milled coupler dispersion prior to coating the photographic element.

摘要翻译： 已经发现，当将至少包含聚氧丙烯（POP）嵌段和聚氧乙烯（POE）嵌段的聚环氧烷化合物或嵌段聚合或嵌段低聚表面活性化合物加入到黄色成色剂的常规分散体中时（即其中分散的 颗粒具有0.1至0.6μm的粒度），与没有任何添加剂的常规分散体相比，在涂覆的卤化银照相元件中的这种分散体产生显着更高的染料产率。 此外，由含有本发明添加剂的这种分散体形成的黄色染料与不含这种添加剂的分散体相比，显着更稳定。 本发明仅在涂布照相元件之前，将所需量的所述聚氧乙烯（POE） - 聚氧丙烯（POP）化合物添加到预先形成的研磨的偶联剂分散体中进行。