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    • 4. 发明授权
    • Process of forming a photographic emulsion
    • 形成照相乳剂的方法
    • US5491056A
    • 1996-02-13
    • US296567
    • 1994-08-26
    • Xin WenRoger Lok
    • Xin WenRoger Lok
    • G03C1/015G03C1/035G03C1/07
    • G03C1/035G03C1/07
    • A process is disclosed for preparing a photographic emulsion utilizing an alkynylamine compound as a grain growth modifier. Specifically, the present invention provides a process of preparing a photographic emulsion comprising:introducing silver ions, halide ions and a grain growth modifier having the structure ##STR1## wherein z represents atoms necessary to complete a five to nine-membered heterocyclic ring system, R.sup.1, R.sup.2 and R.sup.3 independently represent hydrogen or a lower alkyl of from 1 to 5 carbon atoms, and R.sup.4 represents hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, which may be substituted or unsubstituted, into a dispersing medium containing silver halide seed grains; andmaintaining the dispersing medium containing the seed grains, silver ions, halide ions and grain growth modifier at a pH in the range from about 4.5 to about 10, and a pAg in the range from about 6.0 to about 9.5.Also disclosed is a photographic element comprising a support having incorporated thereon a silver halide emulsion layer, the silver halide emulsion layer comprising silver halide grains internally containing a compound of the structure ##STR2## wherein Z represents atoms necessary to complete a five to nine-membered heterocyclic ring system; R.sup.1, R.sup.2 and R.sup.3 independently represent hydrogen or a lower alkyl of from 1 to 5 carbon atoms, with the proviso that at least one of R.sup.1, R.sup.2 and R.sup.3 be a lower alkyl of from 1 to 5 carbon atoms; and R.sup.4 represents hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, which may be substituted or unsubstituted.
    • 公开了一种利用炔基胺化合物作为晶粒生长改性剂制备照相乳剂的方法。 具体地说,本发明提供一种制备照相乳剂的方法,其包括:引入银离子,卤离子和具有结构的晶粒生长改性剂,其中z表示完成五至九元杂环体系所需的原子,R1 ,R2和R3独立地表示氢或1〜5个碳原子的低级烷基,R4表示氢,或可被取代或未取代的脂族,碳环或杂环基团,形成含有卤化银种子颗粒的分散介质 ; 并且在约4.5至约10的pH范围内将含有种子晶粒,银离子,卤离子和晶粒生长调节剂的分散介质保持在约6.0至约9.5的范围内。 还公开了一种照相元件,其包括其上并入有卤化银乳剂层的载体,所述卤化银乳剂层包含卤化银颗粒,内部含有结构“IMAGE”的化合物,其中Z表示完成五至九元 杂环体系; R 1,R 2和R 3独立地表示氢或1至5个碳原子的低级烷基,条件是R 1,R 2和R 3中的至少一个为1至5个碳原子的低级烷基; 并且R 4表示氢,或可以被取代或未取代的脂族,碳环或杂环基。