GB1453879A - Photographic material with improved properties air outlet nozzles - Google Patents

Abstract

1453879 Stabilized photographic emulsions AGFA-GEVAERT AG 24 June 1974 [27 June 1973] 27850/74 Heading G2C A light-sensitive photographic material containing at least one silver halide emulsion layer also contains in any of the layers a homopolymer or random copolymer of any of the general Formulae:- in which R 1 represents hydrogen, a straight or branched chain alkyl group, a substituted or unsubstituted aryl group, a cyanoalkyl group or the group -CO-NHR 2 ; R 2 represents hydrogen, a straight or branched chain alkyl group, a cycloalkyl group, a substituted or unsubstituted aryl group or an alkoxy alkyl group, z represents a residue of an acrylic methacrylic, fumaric or maleic acid or an ammonium or alkali metal salt thereof; an acrylamide or methacrylamide residue; an N-alkyl acrylamide or methacrylamide residue; an N-hydroxyalkyl acrylamide or methacrylamide residue; an N-oxoalkyl acrylamide or methacrylamide residue; the residue of a fumaric or maleic acid semiamide or an ammonium or alkali metal salt thereof; the residue of a mono or di-hydroxyalkyl acrylate or methacrylate; the residue of a dialkylaminoalkyl acrylate or methacrylate; the residue of a sulphoalkyl-carboxylate or a vinyl pyrrolidone, vinylcaprolactam, vinyl-pyridine or vinyl imidazole; Y represents a polymerizable group selected from the residues of styrene, an acrylic acid ester or the compound CH 2 =C(CH 2 -O-CO-R 3 ) 2 in which R3 represents an alkyl group; x = 3 to 20; n = 5 to 99À5 mols % and m = 95 to 0À5 mols % when p = o and n = 5 to 80 mols. % and m = 50 to 10 mols. % and p = 45 to 10 mols. % when p # 0. The polymers prevent fogging during prolonged storage or at elevated temperatures.