Photographic silver halide emulsion

Claim 2

A light sensitive photographic silver halide emulsion containing silver halide particles dispersed in a hydrophilic colloid binder composition wherein the improvement comprises the binder composition contains 500 mg to 500 g per mol of the silver halide and up to 100% of the binder composition of a polymer wherein the polymer used contains recurring units of compound A with recurring units of compound B, said compound B being in an amount of 0.01 to 20% by weight of said polymer, and said polymer having an S-atom in the main chain, which compounds A and B correspond to the following formulae: Formulae A and B ##STR6## B: H--S.sub.n --Q.sup.1 --W).sub.m Q.sup.2 --S--H in which R 1 , R 2 and R 3 which may be the same or different, represent hydrogen or substituted or unsubstituted alkyl or aryl; Y represents oxygen or --NR 4 --; R 4 represents hydrogen or alkyl, in particular with 1 to 4 carbon atoms; Z represents a substituted or unsubstituted alkylene or a substituted or unsubstituted arylene; X represents NR 1 R 2 , H, OH, SO 3 H, PO 3 H, COOH or a heterocyclic group; Q 1 and Q 2 which may be the same or different represent a substituted or unsubstituted alkylene or arylene group or a heterocyclic group; W represents oxygen or sulphur and n, m, r and s which may be the same or different, represent 0 or 1; the said polymer being a peptizing agent, and, the remainder of the binder composition being made up with protective colloid.

Claim 3

Photographic material according to claim 1, characterised in that compound B corresponds to one of the following formulae: (1) HS--R.sup.5 --X or ##STR7## or (3) HS--Q.sup.1 --W).sub.m Q.sup.2 --SH in which R 5 represents substituted or unsubstituted alkylene or phenylene; G represents the members required to complete a 5-membered or 6-membered ring, which members may carry a condensed aromatic ring; Q 1 and Q 2 represents alkylene when m=1; Q 2 represents alkylene or a heterocyclic group when m=0 and in which X has the meaning indicated in claim 1.

Claim 4

Photographic material according to claim 1, characterised in that Q 1 and/or Q 2 represents ethylene.

Claim 5

Photographic material according to claim 1, characterised in that the polymer is built up of units of acrylic acid and mercapto ethanol and/or acrylamide and bis-mercaptoethylsulphide.

Claim 6

Light-sensitive photographic material having at least one silver halide emulsion layer, characterized by containing as a peptizing agent 500 mg to 500 g per mol of the silver halide and up to 100% of the agent a polymer wherein the polymer used contains recurring units of compound A with recorring units of compound B, said compound B being in an amount of 0.01 to 20% by weight of said polymer, and said polymer having an S-atom in the main chain, said compounds A and B correspond to the following formulae: ##STR8## B: H--S.sub.n --Q.sup.1 --W).sub.m Q.sup.2 --S--H in which R 1 and R 2 represent hydrogen; R 3 represents hydrogen or methyl; X represents SO 3 H, COOH, CONH 2 or a heterocyclic group containing nitrogen and/or hydrogen when s=0; Y represents oxygen or --NR 4 --; R 4 represents hydrogen or alkyl, in particular with 1 to 4 carbon atoms; Z represents a substituted or unsubstituted alkylene or a substituted or unsubstituted arylene; Q 1 and Q 2 which may be the same or different represent a substituted or unsubstituted alkylene or arylene group or a heterocyclic group; W represents oxygen or sulphur and n, m, r and s which may be the same or different, represent 0 or 1; the remainder of the agent being made up with protective colloid.

Claim 7

Light-sensitive photographic material having at least one silver halide emulsion layer, characterized by containing as a peptizing agent 500 mg to 500 g per mol of the silver halide and up to 100% of the agent a polymer wherein the polymer used contains recurring units of compound A with recorring units of compound B, said compound B being in an amount of 0.01 to 20% by weight of said polymer, and said polymer having an S-atom in the main chain, said compounds A and B correspond to the following formulae: ##STR8## B: H--S.sub.n --Q.sup.1 --W).sub.m Q.sup.2 --S--H in which R 1 and R 2 represent hydrogen; R 3 represents hydrogen or methyl; X represents SO 3 H, COOH, CONH 2 or a heterocyclic group containing nitrogen and/or hydrogen when s=0; Y represents oxygen or --NR 4 --; R 4 represents hydrogen or alkyl, in particular with 1 to 4 carbon atoms; Z represents a substituted or unsubstituted alkylene or a substituted or unsubstituted arylene; Q 1 and Q 2 which may be the same or different represent a substituted or unsubstituted alkylene or arylene group or a heterocyclic group; W represents oxygen or sulphur and n, m, r and s which may be the same or different, represent 0 or 1; the remainder of the agent being made up with protective colloid.

Claim 8

In the process for the preparation of a photosensitive silver salt emulsion by precipitation and physical ripening of the silver salt in the presence of a peptisation agent, characterized in that precipitation of the silver salt is carried out in the presence of a hydrophilic binder composition for the silver salt emulsion the binder composition contains 500 mg to 500 g per mol of the silver salt and up to 100% of the binder composition of a polymer wherein the polymer used contains recurring units of compound A with recurring units of compound B, said compound B in an amount of 0.01 to 20% by weight of said polymer and said polymer having an S-atom in the main chain, which compounds A and B correspond to the following formulae: Formulae ##STR9## B: H--S.sub.n --Q.sup.1 --W).sub.m Q.sup.2 --S--H in which R 1 , R 2 and R 3 which may be the same or different, represent hydrogen or substituted or unsubstituted alkyl or aryl; Y represents oxygen or --NR 4 --; R 4 represents hydrogen or alkyl, in particular with 1 to 4 carbon atoms; Z represents a substituted or unsubstituted alkylene or a substituted or unsubstituted arylene; X represents NR 1 R 2 , H, OH, SO 3 H, PO 3 H, COOH or a heterocyclic group; Q 1 and Q 2 which may be the same or different, represent a substituted or unsubstituted alkylene or arylene group or a heterocyclic group; W represents oxygen or sulphur; and n, m, r and s which may be the same or different, represent 0 or 1; the remainder of the binder composition being made up with protective colloid.

Claim 9

In the process for the preparation of a photosensitive silver salt emulsion by precipitation and physical ripening of the silver salt in the presence of a peptisation agent, characterized in that precipitation of the silver salt is carried out in the presence of a hydrophilic binder composition for the silver salt emulsion the binder composition contains 500 mg to 500 g per mol of the silver salt and up to 100% of the binder composition of a polymer wherein the polymer used contains recurring units of compound A with recurring units of compound B, said compound B in an amount of 0.01 to 20% by weight of said polymer and said polymer having an S-atom in the main chain, which compounds A and B correspond to the following formulae: Formulae ##STR9## B: H--S.sub.n --Q.sup.1 --W).sub.m Q.sup.2 --S--H in which R 1 , R 2 and R 3 which may be the same or different, represent hydrogen or substituted or unsubstituted alkyl or aryl; Y represents oxygen or --NR 4 --; R 4 represents hydrogen or alkyl, in particular with 1 to 4 carbon atoms; Z represents a substituted or unsubstituted alkylene or a substituted or unsubstituted arylene; X represents NR 1 R 2 , H, OH, SO 3 H, PO 3 H, COOH or a heterocyclic group; Q 1 and Q 2 which may be the same or different, represent a substituted or unsubstituted alkylene or arylene group or a heterocyclic group; W represents oxygen or sulphur; and n, m, r and s which may be the same or different, represent 0 or 1; the remainder of the binder composition being made up with protective colloid.