申请人:Fuji Photo Film Co., Ltd.
公开号:US03957492A1
公开(公告)日:1976-05-18
A photographic emulsion containing a novel amphoteric copolymer which comprises: A. 0.5 to 30 mole % of cation-site containing repeating units of the formula (I) ##EQU1## wherein R.sub.1 represents a hydrogen atom or a methyl group and n is 1, 2, 3 or 4; B. 0.5 to 30 mole % of anion-site containing repeating units of the formula (II) ##EQU2## wherein R.sub.2 represents a hydrogen atom or a methyl group, and X represents ##SPC1## --COOM, --SO.sub.3 M or --COO(CH.sub.2).sub.m SO.sub.3 M, where M is a cation and m is 3 or 4; and C. the balance of repeating units of the formula (III) ##EQU3## wherein R.sub.3 represents a hydrogen atom or a methyl group, R.sub.4 and R.sub.5 each represents a hydrogen atom or a lower alkyl group or a substituted alkyl group thereof. The novel amphoteric copolymer can be substituted partly or entirely for the gelatin in a photographic emulsion, with excellent photographic effects.
含有新型两性共聚物的照相乳剂,包括:A. 0.5至30摩尔%的阳离子位点含有公式(I)的重复单元,其中R1表示氢原子或甲基基团,n为1、2、3或4;B. 0.5至30摩尔%的阴离子位点含有公式(II)的重复单元,其中R2表示氢原子或甲基基团,X表示##SPC1## --COOM、--SO3M或--COO(CH2)mSO3M,其中M为阳离子,m为3或4;C. 公式(III)的重复单元的平衡,其中R3表示氢原子或甲基基团,R4和R5各表示氢原子或较低的烷基基团或其取代基。这种新型两性共聚物可以部分或完全替代照相乳剂中的明胶,具有优异的照相效果。