专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06245480B1 High contrast photographic element containing a novel nucleator 失效
标题翻译：含有新型成核剂的高对比度照相元件
公开(公告)号：US06245480B1
公开(公告)日：2001-06-12
申请号：US09591774
申请日：2000-06-12
申请人： Judith A. Bogie , Philip J. Coldrick , John D. Goddard , Llewellyn J. Leyshon
发明人： Judith A. Bogie , Philip J. Coldrick , John D. Goddard , Llewellyn J. Leyshon
IPC分类号： G03C108
CPC分类号： G03C1/061 , G03C2001/108
摘要： The invention relates to an ultrahigh contrast photographic material comprising a support bearing a silver halide emulsion layer, containing a hydrazide nucleating agent in the emulsion layer or a hydrophilic colloid layer, characterised in that the nucleating agent of formula (I) comprises (a) two nicotinamide moieties, which may be the same or different, which are linked by a linking group, and (b) a hydrazide moiety linked to only one of the nicotinamide moieties. The nucleator of formula (I) may be in combination with a nucleator of formula (II) which comprises a dimeric molecule comprising two monomers linked by a linking group, each monomer of which (a) may be the same or different and (b) comprises a hydrazide moiety and a nicotinamide moiety. The photographic material provides unexpectedly good nucleation in the absence of, or with reduced amounts of, booster and in a developer whose pH is variable, and further with lower chemical spread and pepper fog. When the synthesis provides both a compound of formula (I) and (II), the products can be used directly without a separation step, providing a cost advantage.
摘要翻译：本发明涉及一种超高对比度照相材料，其特征在于，式（I）的成核剂包括：（a）两个（II）的成核剂，其特征在于，所述超高对比度照相材料包含载体，所述载体含有在所述乳剂层中的酰肼成核剂或亲水胶体层的卤化银乳剂层，烟酰胺部分，其可以相同或不同，其通过连接基团连接，和（b）仅与一个烟酰胺部分连接的酰肼部分。式（I）的成核剂可以与式（II）的成核剂组合，其包含包含通过连接基团连接的两个单体的二聚体分子，其各自的单体（a）可以相同或不同，和（b）包含酰肼部分和烟酰胺部分。照相材料在不存在或具有减少量的助催化剂和在pH可变的显影剂中进一步具有较低的化学扩散和胡椒雾的情况下提供出人意料的良好成核。当合成提供式（I）和（II）的化合物时，可以直接使用产物而不进行分离步骤，从而提供成本优势。

IPRDB

热门服务

关于我们

友情链接

联系方式