Photographic gelatin-n-vinyllactam silver halide emulsions containing phenolic antifoggants

Claim 1

A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING ON A DRY-WEIGHT BASIS 30% TO 70% SILVER HALIDE, 10% TO 60% GELATIN, 8% TO 50% OF AN ORGANIC WATER-SOLUBLE ADITION POLYMER TAKEN FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF AT LEAST ONE N-VINYLLACTAM CONTAINING 4 TO 5 CARBON ATOMS IN THE HETEROCYCLIC RING AND COPOLYMERS OF SUCH AN N-VINYLLACTAM WITH AN ETHYLENICALLY UNSATURATED COMPOUND TAKEN FROM THE GROUP CONSISTING OF VINYL SALICYLATE VINYL ACETATE VINYL OXAZOLIDONE METHYL ACRYLATE ACRYLAMIDE METHACRYLAMIDE ACRYLONRITRILE VINYL CHLORIDE VINYLIDENE CHLORIDE AND STYRENE CONTAINING AT LEAST 80% BY WEIGHT OF SAID N-VINYLLACTAM AND 5 TO 50 MILLIMOLES PER MOLE OF SILVER HALIDE OF A PHENOL ANTIFOGGING AGENT TAKEN FROM THE GROUP CONSISTING OF (A) A HYDROCARBON-SUBSTITUTED MONOHYDRIC PHENOL OF AT LEAST 10 CARBON ATOMS HAVING A HYDROCARBON SUBSTITUENT IN THE PARA-POSITION TO THE HYDROXY GROUP AND 0 TO 4 ADDITIONAL HYDROCARBON SUBSTITUENTS IN THE REMAINDER OF THE BENZENE RING, SAID HYDROCARBON SUBSTITUENTS BEING THE SOLE SUBSTITUENTS IN SAID PHENOL AND BEING MEMBERS TAKEN FROM THE GROUP CONSISTING OF ALKYL ARYL, ARAKYL AND CYCLOALKYL SUBSTITUENTS, (B) HYDROCARBON-SUBSTITUTED MONOCULEAR MONOHYDRIC PHENOLS OF AT LEAST 10 CARBON ATOMS WHEREIN THE HYDROCARBON SUBSTITUENTS CONTAINS 4 TO 12 CARBON ATOMS AND IS IN ONE OF THE POSITIONS ORTHO-AND META- TO THE HYDROXYL GROUP AND THE OTHER POSITIONS ORTHO-AND META- TO RING ARE UNSUBSTITUTED, (C) A COMPOUND OF THE GENERAL FORMULA: