Silver halide supersensitized photographic emulsions

Abstract

Abstract A SIHLVER HALIDE LIGHT-SENSITIVE PHOTOGARPHIC EMULSION CONATINING AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FORMULA 1: 2-((3-R2,5-R4-2,3-DIHYDROBENZOXAZOL-2-YLIDENE)=CH-C(-A)= CH-),3-R1,5-R3-BENZOXAZOLIUM (X1(-))(N-1) WHEREIN R5 AND R6 EACH REPRESENTS AN ALKYL GROUP OR A SUBSTITUTED ALKYL GROUP; R7 AND R8 EACH REPRESENTS AN ALLKYL GROUP, A SUBSTITUTED ALKYL GROUP, AN OPTIONALLY NEUTRALIZED SULFOALKYL GROUP OR A SUBSTITUTED ALKYL GROUP HAVING AN OPTIONALLY NEUTRALIZED SULFO GROUP WHEREIN THE ALKYL MOIETY THEREOF IS ATTACHED TO THE SULFO GROUP THEREOF THROUGH AT LEAST ONE ALKOXYL GROUP OR DIRECTLY CONNECTED WITH A HYDROXY GROUP AND THE SULFO GROUP; AT LEAST ONE OF SAID R7 AND R8 REPRESENTING A CARBAMYLALKYL GROUP OR SAID SULFOALKYL GROUP OR SAID SUBSTITUTED ALKYL GROUP HAVING A SULFO GROUP; R9 R10, R11 AND R12 EACH REPRESENTS A HYDROGEN ATOM, AN ALKYLSULFONYL GROUP; AN ALKYLSULFAMOYL GROUP, A N-DI-SUBSTITUTED AMINOSULFONYL GROUP, AN ALKYLCARBAMOYL GROUP, A N-DI-SUBSTITUTED CARBAMOYL GROUP, A CYANO GROUP, A TRIFLUOROMETHYL GROUP OR A HALOGEN ATOM; X1- REPRESENTS AN ACID ANION; AND M IS 1 OR 2; M BEING 1 WHEN AT LEAST ONE OF SAID R7 AND R8 IS THE SUBSTITUENT HAVING A SULFO GROUP; AT LEAST ONE OF SAID R5 AND R6 BEING SAID SUBSTITUTED ALKYL GROUP OR AT LEAST ONE OF SAID R7 OR R8 BEING SAID SUBSTITUTED ALKYL GROUP HAVING AN OPTIONALLY NEUTRALIZED SULFO GROUP WHEN ALL HOOF SAID R9, R10, R11 AND R12 ARE A HYDROGEN ATOM, A HALOGEN ATOM OR MIXTURES THEREOF; WITH THE PROVISO THAT WHEN SAID R3 AND R4 ARE SIMULTANEOUSLY PHENYL, SAID R9, R10, R11 AND R12 MAY NOT SIMULTANEOUSLY BE BYDROGEN OR CHLORINE. (X1(-))(M-1) YLIDENE)=CH-CH=CH-),3-R7,5-R11,6-R9-BENZIMIDAZOLIUM 1-R5,2-((1-R6,3-R8,5-R12,6-R10-2,3-DIHYDROBENZIMIDAZOL-2- WHEREIN A REPRESENTS AN ALKYL GROUP HAVING FROM 1 TO 4 CARBON ATOMS; R3 REPRESENTS HALOGEN ATOM, A HYDROXY GROUP OR A PHENYL GROUP; R4 REPRESENTS A HYDROGEN ATOM, A HALOGEN ATOM, A PHENYL GROUP, A HYDROXYL GROUP, AN ALKYL GROUP, OR AN ALKOXYL GROUP; R1 AND R2 EACH REPRESENTS AN ALKYL GROUP OR AN OPTIONALLY NEUTRALIZED SULFOALKYL GROUP; X1- REPRESENTS AN ACID ANION; AND N IS 1 OR 2; SAID N BEING 1 WHEN AT LEAST ONE OF SAID R1 AND R2 IS A SULFOALKYL GROUP; AND AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FORMULA II:

Inventors

• 👤 K Shiba
• 👤 A Sato

Bibliographic Details