Silver halide light-sensitive material containing a heterocyclic thione and a polyalkylene oxide

Claim 1

A SILVER HALIDE LIGHT-MATERIAL WHICH COMPRISES IN A SILVER HALIDE EMULSION LAYER OR A LAYER ADJACENT THERETO AT LEAST ONE HETEROCYCLIC THIOKETONE COMPOUND WHICH DOES NOT FORM A MERCAPTO GROUP THROUGH TAUTOMERISM, SAID COMPOUND BEING REPRESENTED BY THE FOLLOWING GENERAL FORMULA (1): R-N<(-C(=S)-Q-) WHEREIN Q REPRESENTS THE GROUP OF ATOMS NECESSARY TO FORM A HETROCYCLIC RING SELECTED FROM THE GROUP CONSISTING BENZOTHIAZLOINE-2-THIONE RING, BENZOSELENAZOLIN-2-THIONE RING, BENZOXAZOLIN-2-THIONE RING, IMIDAZOLIN-2-THIONE RING, BENZIMIDAZOLIN-2-THIONE RING, SELENAZOLIDIN-2-THIONE RING, 4 SELENAZOLIN-2-THIONE RING, 1,3,4-THIODIAZOLIN-2-THIONE RING 1,3,4-SELENADIAZOLINE-2-THIONE RING, 1,2-DIHYDROPYRIDIN-2THIONE RING, 1,2-DIHYDROQUINOLIN-2-THIONE RING, 4,5-TETRAMETHYLENETHIAZOLIN-2-THIONE RING, 4,5-TRIMETHYLENETHIAZOLINE-2THIONE RING, NAPHTHOTHIAZOLIN-2-THIONE RING, AND THIAZOLIDIN-2THOINE RING, AND R REPRSENTS AN UNSUBTITUTED ALKYL GROUP, AN ARALKYL GROUP AN ARYL GROUP, A 2-PYRIDYL GROUP OR A DIPRIDYL GROUP AND AT LEAST 1 POLYAKYLENE OXIDE DERIVATIVE HAVING A MOLECULAR WEIGHT RANGING FROM 500 TO 12,000 SELECTED FROM THE GROUP CONSISTING OF A. BLOCK COPOLYMERS OF ALKYLENE OXIDE, B. POLYALKYLENEGYLCOLS, C. ADDITION POLYMERIZATION PRODUCTS BETWEEN ALKYLENE OXIDES AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ALIPHATIWC ALCOHOL, AND AROMATIC ALCOHOL, GYCOLS, FATTY ACIDS, ORGANIC AMINES, AND A DEHYDRATED COMPOUND OF HEXITOL DERIVATEVES, AND D. CONDENSATES OF A POLYALKYLENE OXIDE WITH SAID COMPOUND, THE COMBINATION OF SAID THIOKETONE COMPOUND AND SAID POLYALKYLENE OXIDE DERIVATIVE BEING INCORPORATED IN SAID LAYER IN CONCENTRATIONS WHICH PROVIDE A HIGH EDGE GRADIENT WITH COMPARATIVELY SHORT DEVELOPMENT TIME AND/OR DOTS HAVING GOOD TOE-GRADATION WHEN SAID MATERIAL IS DEVELOPED