Heat developable light-sensitive material

Claim 2

A heat developable light-sensitive material comprising a support having thereon at least one layer and containing as essential components (a) an organic silver salt, (b) 0.001 mol to 0.5 mol per mol of organic silver salt of at least one N-halo compound capable of forming a light-sensitive silver halide by reaction with said organic silver salt and (c) a reducing agent, and with at least one layer containing (d) an iron family compound which prevents thermal fog selected from the group consisting of iron (II) nitrate, iron (III) nitrate, iron (II) acetate, iron (III) acetate, iron (II) formate, iron (III) formate, iron (II) sulfate, iron (III) sulfate, iron (II) perchlorate, iron (III) perchlorate, cobalt (II) nitrate, cobalt (III) nitrate, cobalt (II) acetate, cobalt (III) acetate, cobalt (II) formate, cobalt (III) formate, cobalt (II) sulfate, cobalt (III) sulfate, cobalt (II) perchlorate, cobalt (III) perchlorate, nickel (II) nitrate, nickel (II) acetate, nickel (II) formate, nickel (II) perchlorate and mixtures thereof or a complex compound of iron, cobalt or nickel said iron family compound being present in an amount of about 10 -5 mole to 10 -1 mole per mole of the organic silver salt (a).

Claim 3

The heat-developable light-sensitive material of claim 1, wherein said organic silver salt is a silver salt of a compound containing an imino group, a mercapto group, a hydroxy group or a carboxy group.

Claim 4

The heat-developable light-sensitive material of claim 2, wherein said organic silver salt is a silver salt of a compound containing a carboxy group.

Claim 5

The heat-developable light-sensitive material of claim 3, wherein said organic silver salt is a monocarboxylic higher fatty acid silver salt.

Claim 6

The heat-developable light-sensitive material of claim 1, wherein said light-sensitive silver halide is selected from the group consisting of silver chloride, silver bromide, silver bromoiodide, silver iodobromochloride, silver bromochloride, silver iodochloride, silver iodide and a mixture thereof.

Claim 7

The heat developable light-sensitive material of claim 1, wherein said reducing agent is a compound selected from the group consisting of a substituted phenol, an unsubstituted bisphenol, a substituted bisphenol, an unsubstituted bisnaphthol a substituted bisnaphthol, a dihydroxynaphthalene, a poly-hydroxynaphthalene, a di-hydroxybenzene, a poly-hydroxybenzene, a hydroquinone monoether, ascorbic acid, a derivative of ascorbic acid, a photolytic reducing agent, a 3-pyrazolidone, a pyrazolone, a reducing saccharide, p-oxyphenyl glycine, hydroxytetronic acid, N,N-di(2-ethoxyethyl)hydroxylamine, an N,N-dialkyl-p-phenylenediamine, 5,7-dihydroxy-4-methylcoumarin, kojic acid, hinokitiol and a mixture thereof.

Claim 8

The heat-developable light-sensitive material of claim 1, wherein said iron family compound has a solubility in water of greater than about 0.01 g/100 ml of water at 25° C.

Claim 9

The heat-developable light-sensitive material of claim 1, wherein said iron family compound is a complex compound of iron, cobalt or nickel.

Claim 10

The heat-developable light-sensitive material of claim 8, wherein said complex compound is a coordination compound comprising a central iron, cobalt or nickel atom and a ligand in which the coordinating atoms include at least one atom selected from the group consisting of a halogen atom, a nitrogen atom, an oxygen atom, a sulfur atom, a phosphorus atom, an arsenic atom, and a mixture thereof.

Claim 11

The heat-developable light-sensitive material of claim 14, wherein said ligand is selected from the group consisting of a β-diketone, an oxime, an oxine, a dithiocarbamine, salicylic acid, picolinic acid, and a mixture thereof.

Claim 12

A method of forming an image comprising image-wise exposing the heat-developable light-sensitive material of claim 1, and heating said exposed light-sensitive material.

Claim 13

The heat-developable light-sensitive material of claim 1, wherein said material comprises said support having thereon said at least one layer and consists essentially of said components (a) to (d).

Claim 14

The heat developable light-sensitive material of claim 1, wherein said N-halo compound is represented by the general formulae (I) and (II) ##STR17## wherein X represents a halogen atom such as chlorine, bromine and iodine; Z represents an atomic group required for the formation of a 5- or 6-membered ring, which may condense with another ring; A represents a carbonyl group or a sulfonyl group; and R 1 and R 2 each represents an alkyl group, an aryl group or an alkoxy group.

Claim 15

The heat-developable light-sensitive material of claim 1, wherein said complex of iron, cobalt or nickel is an inner complex wherein the minus charge attributable to the electro-negative ligands and plus charge attributable to iron, cobalt or nickel compensate for each other and the coordinating sphere thereof becomes electrically neutral.

Claim 16

The heat-developable material of claim 1, wherein said iron family compound (d) is selected from the group consisting of cobalt nitrate, nickel nitrate and iron nitrate.

Claim 17

The heat-developable light-sensitive material of claim 1, wherein said complex of iron, cobalt or nickel is selected from the group consisting of [Fe(dtc) 3 ] [Fe(dtp) 3 ] [Fe(acac) 3 ] [Fe(oxin) 3 ] [FeN(CH 2 CH 2 O) 3 ] [fe(bipy) 3 ](ClO 4 ) 3 .3H 2 O [fe(o-phen) 3 ](ClO 4 ) 3 [fe(urea) 6 ](ClO 4 ) 3 (nh 4 ) 3 [fe(ox) 3 ] [Fe(py) 4 ](ClO 4 ) 3 Na[Fe(edta)].3H 2 O K 3 [fe(sal) 3 ] Fe(NH 3 ) 6 ](ClO 4 ) 3 [fe(oxin) 2 ] [Fe(dmg) 2 Py 2 ] [Fe(C 6 H 5 NH 2 ) 2 Cl 2 ] [Fe(bipy) 3 ]SO 4 [ni(oxin) 2 ].2H 2 O Ni(acac) 2 Ni(3-Br-acac) 2 Ni(H 2 edta) Ni(gly) 2 Ni(NH 2 OH) 4 (NO 3 ) 2 [co(acac) 2 ] [Co(NH 3 ) 6 ](NO 3 ) 3 [co(en) 3 ](NO 3 ) 3 [co(py) 6 ](NO 3 ) 3 [co(bipy) 3 ](NO 3 ) 3 [co(o-phen) 3 ](NO 3 ) 3 K 3 [co(CN) 6 ] [co(acac) 3 ] [Co(gly) 3 ] [Co(exan) 3 ] [Co(dtc) 3 ] [Co(oxin) 3 ] ##STR18## [Ni(NH 3 ) 6 ](ClO 4 ) 2 [Ni(en) 3 ](ClO 4 ) 2 [ni(py) 6 ](ClO 4 ) 2 [ni(py) 4 Cl 2 ] [Ni(bipy) 3 ](NO 3 ) 2 [ni(o-phen) 2 ](NO 3 ) 2 .

Claim 18

the heat-developable light-sensitive material of claim 14, wherein said inner complex is [Fe(dtc) 3 ], [Fe(dtp) 3 ], [Fe(acac) 3 ], [Fe(oxin) 3 ], [FeN(CH 2 CH 2 O) 3 ], [Fe(oxin) 2 ], [Fe(dmg) 2 Py 2 ], [Fe(C 6 H 5 NH 2 ) 2 Cl 2 ], K 3 [Co(CN) 6 ], [Co(acac) 3 ], [Co(gly) 3 ], [Co(exan) 3 ], [Co(dtc) 3 ], [Co(oxin) 3 ], ##STR19## [Co(acac) 2 ], [Ni(py) 4 Cl 2 ], Ni(acac) 2 , Ni(3-Br-acac) 2 , Ni(H 2 edta), Ni(gly) 2 .

Claim 19

The heat-developable light-sensitive material of claim 13, wherein said 5 or 6-membered ring formed by Z is selected from the group consisting of a pyrrole ring, a pyrroline ring, a pyrrolidine ring, an imidazoline ring, an imidazolidine ring, a pyrazoline ring, a pyrazolidine ring, a piperidine ring, an oxazine ring, a thiazine ring, a piperazine ring, a hydantoin ring, a cyanuric acid ring, a thiohydantoin ring and an indoline ring.

Claim 20

The heat-developable light-sensitive material of claim 13, wherein said aryl group is an unsubstituted or substituted phenyl or naphthyl.

Claim 21

The heat-developable light-sensitive material of claim 1 wherein said N-halo compound is selected from the group consisting of N-bromosuccinimide, N-bromotetrafluorosuccinimide, N-bromophthalimide, N-bromoglutarimide, 1-Bromo-3,5,5-trimethyl-2,4-imidazolidinedione, 1,3-Dibromo-5,5-dimethyl-2,4-imidazolidinedione, N,n'-dibromo-5,5-diethylbarbituric acid, N,n'-dibromobarbituric acid, N-bromoisocyanuric acid, N-bromoacetamide, N-bromochloroacetamide, N-bromotrifluoroacetamide, N-bromoacetanilide, N-bromobenzenesulfonylanilide, N-bromobenzamide, N-bromobenzenesulfonylamide, N-bromo-N-benzenesulfonylbenzenesulfonylamide, N-bromophthalazone, N-chlorosuccinimide, N-iodosuccinimide, Trichloroisocyanuric acid, N-chlorophthalimide,

Claim 22

3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione, 3-Chloro-5,5-dimethyl-2,4-imidazolidinedione, 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione, Trichloromelamine, Tribromomelamine, N-bromocyclohexanedicarbonimide, 1-Bromo-3,5,5-triethyl-2,4-imidazolidinedione, 1-Bromo-3-ethyl-5,5-dimethyl-2,4-imidazolidinedione, 1,3-Dibromo-5,5-diethyl-2,4-imidazolidinedione, N,n-dibromo-5,5-dimethylbarbituric acid, N,n-dibromo-5-ethyl-5-methylbarbituric acid, N,n-dibromo-5-ethyl-5-phenylbarbituric acid, N,n'-dibromoisocyanuric acid, N-bromoacetamide, N-bromonaphthamide, N-bromohydroxybenzamide, N-bromocarboxybenzamide, N-bromotoluenesulfonamide, N-bromo-N-toluenesulfonyltoluenesulfonylamide, 1-Bromo-3,5,5-trimethyl-2,4-imidazolidinedithione, 1-Bromo-3,5,5-triethyl-2,4-imidazolidinedithione, 1-Bromo-3-ethyl-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Dibromo-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Dibromo-5,5-diethyl-2,4-imidazolidinedithione, 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedithione, 3-Chloro-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Diiodo-5,5-dimethyl-2,4-imidazolidinedithione, and N-bromosaccharin.

Claim 23

3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione, 3-Chloro-5,5-dimethyl-2,4-imidazolidinedione, 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione, Trichloromelamine, Tribromomelamine, N-bromocyclohexanedicarbonimide, 1-Bromo-3,5,5-triethyl-2,4-imidazolidinedione, 1-Bromo-3-ethyl-5,5-dimethyl-2,4-imidazolidinedione, 1,3-Dibromo-5,5-diethyl-2,4-imidazolidinedione, N,n-dibromo-5,5-dimethylbarbituric acid, N,n-dibromo-5-ethyl-5-methylbarbituric acid, N,n-dibromo-5-ethyl-5-phenylbarbituric acid, N,n'-dibromoisocyanuric acid, N-bromoacetamide, N-bromonaphthamide, N-bromohydroxybenzamide, N-bromocarboxybenzamide, N-bromotoluenesulfonamide, N-bromo-N-toluenesulfonyltoluenesulfonylamide, 1-Bromo-3,5,5-trimethyl-2,4-imidazolidinedithione, 1-Bromo-3,5,5-triethyl-2,4-imidazolidinedithione, 1-Bromo-3-ethyl-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Dibromo-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Dibromo-5,5-diethyl-2,4-imidazolidinedithione, 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedithione, 3-Chloro-5,5-dimethyl-2,4-imidazolidinedithione, 1,3-Diiodo-5,5-dimethyl-2,4-imidazolidinedithione, and N-bromosaccharin.

Claim 24

In a process of producing the heat-developable light-sensitive material which comprises (1) reacting (a) an organic silver salt and (b) 0.001 mol to 0.5 mol per mol of organic silver salt of at least one N-halo compound (2) adding (c) a reducing agent to the reaction product of step (1), and (3) coating said mixture on a support, the improvement comprising adding (d) an iron family compound to said organic silver salt before or during said reaction (1), wherein said iron family compound prevents thermal fog and is selected from the group consisting of iron (II) nitrate, iron (III) nitrate, iron (II) acetate, iron (III) acetate, iron (II) formate, iron (III) formate, iron (II) sulfate, iron (III) sulfate, iron (II) perchlorate, iron (III) perchlorate, cobalt (II) nitrate, cobalt (III) nitrate, cobalt (II) acetate, cobalt (III) acetate, cobalt (II) formate, cobalt (III) formate, cobalt (II) sulfate, cobalt (III) sulfate, cobalt (II) perchlorate, cobalt (III) perchlorate, nickel (II) nitrate, nickel (II) acetate, nickel (II) formate, nickel (II) perchlorate and mixtures thereof or a complex compound of iron, cobalt or nickel said iron family compound being present in an amount of about 10 -5 mole to 10 -1 mole per mole of the organic silver salt (a).

Claim 25

In a process of producing the heat-developable light-sensitive material which comprises (1) reacting (a) an organic silver salt and (b) 0.001 mol to 0.5 mol per mol of organic silver salt of at least one N-halo compound (2) adding (c) a reducing agent to the reaction product of step (1), and (3) coating said mixture on a support, the improvement comprising adding (d) an iron family compound to said organic silver salt before or during said reaction (1), wherein said iron family compound prevents thermal fog and is selected from the group consisting of iron (II) nitrate, iron (III) nitrate, iron (II) acetate, iron (III) acetate, iron (II) formate, iron (III) formate, iron (II) sulfate, iron (III) sulfate, iron (II) perchlorate, iron (III) perchlorate, cobalt (II) nitrate, cobalt (III) nitrate, cobalt (II) acetate, cobalt (III) acetate, cobalt (II) formate, cobalt (III) formate, cobalt (II) sulfate, cobalt (III) sulfate, cobalt (II) perchlorate, cobalt (III) perchlorate, nickel (II) nitrate, nickel (II) acetate, nickel (II) formate, nickel (II) perchlorate and mixtures thereof or a complex compound of iron, cobalt or nickel said iron family compound being present in an amount of about 10 -5 mole to 10 -1 mole per mole of the organic silver salt (a).

Claim 26

The heat-developable light-sensitive material of claim 13, wherein said aryl group is substituted with an alkyl group containing 1 to 4 carbon atoms.

Claim 27

The heat-developable light-sensitive material of claim 13, wherein said alkoxy group has 1 to 8 carbon atoms.