US4283477A — Photothermographic material and process

Claim 1

Independent Claim 68 words

In a photothermographic element comprising (A) at least one photosensitive layer comprising a diazo or silver halide photosensitive component, (B) at least one layer comprising a processing agent for said photosensitive component and (C) a separation polymer between said photosensitive component and said processing agent, the improvement wherein said separation polymer (C) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 2

Dependent Claim 68 words

In a photothermographic element comprising (A) at least one photosensitive layer comprising a diazo or silver halide photosensitive component, (B) at least one layer comprising a processing agent for said photosensitive component and (C) a separation polymer between said photosensitive component and said processing agent, the improvement wherein said separation polymer (C) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 3

Dependent Claim 51 words

A photothermographic element as in claim 1 wherein said polysulfonamide is a compound represented by the structure: ##STR9## wherein R 11 and R 12 are individually alkyl containing 1 to 3 carbon atoms or halogen; and, Z 3 and Z 4 represent the carbon atoms necessary to complete a carbocyclic ring.

Claim 4

Dependent Claim 14 words

A photothermographic element as in claim 1 wherein said polysulfonamide consists essentially of poly(ethylene-co-1,4-cyclohexyldimethylene-toluene-2,4-disulfonamide).

Claim 5

Dependent Claim 101 words

In a photothermographic element having increased preexposure storage stability, said element comprising (A) a layer comprising, (a) in a binder, (b) a dye-forming coupler and (c) a reducing agent which in its oxidized form reacts with said coupler to produce a dye, and (B) a layer comprising, (d) in a binder, (e) photosensitive silver halide and (f) an organic silver salt oxidizing agent which, with said reducing agent, is an oxidation-reduction image-forming combination, and (C) an overcoat layer, the improvement wherein said binder in (A) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 6

Dependent Claim 101 words

In a photothermographic element having increased preexposure storage stability, said element comprising (A) a layer comprising, (a) in a binder, (b) a dye-forming coupler and (c) a reducing agent which in its oxidized form reacts with said coupler to produce a dye, and (B) a layer comprising, (d) in a binder, (e) photosensitive silver halide and (f) an organic silver salt oxidizing agent which, with said reducing agent, is an oxidation-reduction image-forming combination, and (C) an overcoat layer, the improvement wherein said binder in (A) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 7

Dependent Claim 14 words

A photothermographic element as in claim 4 wherein said polysulfonamide consists essentially of poly(ethylene-co-1,4-cyclohexyldimethylene-toluene-2,4-disulfonamide).

Claim 8

Dependent Claim 17 words

A photothermographic element as in claim 4 wherein said overcoat layer consists essentially of a styrene-butadiene copolymer.

Claim 9

Dependent Claim 107 words

In a photothermographic element comprising a support having thereon (A) a first layer comprising (a) photosensitive silver halide in reactive association with (b) an organic silver salt oxidizing agent, in (c) a gelatino binder, and (B) contiguous to (A), a second layer comprising (d) a diffusible, organic reducing agent for said organic silver salt, (e) a diffusible, dye-forming coupler that forms a dye with the oxidized form of the reducing agent in (f) a polymeric binder, the improvement wherein said polymeric binder in (B) comprises a polysulfonamide that has the properties of being permeable to said reducing agent and producing increased preexposure storage stability for said element.

Claim 10

Dependent Claim 107 words

In a photothermographic element comprising a support having thereon (A) a first layer comprising (a) photosensitive silver halide in reactive association with (b) an organic silver salt oxidizing agent, in (c) a gelatino binder, and (B) contiguous to (A), a second layer comprising (d) a diffusible, organic reducing agent for said organic silver salt, (e) a diffusible, dye-forming coupler that forms a dye with the oxidized form of the reducing agent in (f) a polymeric binder, the improvement wherein said polymeric binder in (B) comprises a polysulfonamide that has the properties of being permeable to said reducing agent and producing increased preexposure storage stability for said element.

Claim 11

Dependent Claim 93 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder, and (b) a silver halide stabilizing concentration of a heterocyclic thione silver halide stabilizing agent, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polymeric antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an oxidation-reduction image-forming combination comprising (i) a silver salt of a long-chain fatty acid, with (ii) a reducing agent, in (f) a poly(vinyl butyral) binder.

Claim 12

Dependent Claim 93 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder, and (b) a silver halide stabilizing concentration of a heterocyclic thione silver halide stabilizing agent, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polymeric antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an oxidation-reduction image-forming combination comprising (i) a silver salt of a long-chain fatty acid, with (ii) a reducing agent, in (f) a poly(vinyl butyral) binder.

Claim 13

Dependent Claim 97 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder consisting essentially of poly(ethylene-co-1,4-cyclohexylenedimethylene-1-methyl-2,4-benzenedisulfonamide), (b) a stabilizing concentration of 1-methyl-4-imidazoline-2-thione, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polyisobutylene antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an image-forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of a 3-amino-1,2,4-triazole silver salt, with (ii) an organic reducing agent consisting essentially of 2,5-dihydroxyphenylacetic acid, in (f) a gelatino binder.

Claim 14

Dependent Claim 97 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder consisting essentially of poly(ethylene-co-1,4-cyclohexylenedimethylene-1-methyl-2,4-benzenedisulfonamide), (b) a stabilizing concentration of 1-methyl-4-imidazoline-2-thione, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polyisobutylene antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an image-forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of a 3-amino-1,2,4-triazole silver salt, with (ii) an organic reducing agent consisting essentially of 2,5-dihydroxyphenylacetic acid, in (f) a gelatino binder.

Claim 15

Dependent Claim 97 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder, and (b) a stabilizing concentration of a heterocyclic thione silver halide stabilizing agent, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polymeric binder, antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an image-forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of an organic nitrogen acid silver salt, with (ii) a reducing agent, in (f) a gelatino binder.

Claim 16

Dependent Claim 97 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) a polysulfonamide binder, and (b) a stabilizing concentration of a heterocyclic thione silver halide stabilizing agent, and, contiguous to (A), (B) a second layer consisting essentially of (c) a polymeric binder, antistrike composition, and, contiguous to (B), (C) a third layer comprising (d) photosensitive silver halide, in reactive association, with (e) an image-forming combination comprising (i) an organic silver salt oxidizing agent consisting essentially of an organic nitrogen acid silver salt, with (ii) a reducing agent, in (f) a gelatino binder.

Claim 17

Dependent Claim 84 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) photosensitive silver halide, in reactive association, with (b) an organic silver salt oxidizing agent consisting essentially of a 3-amino-5-benzylthio-1,2,4-triazole silver salt, in (c) a gelatino binder, and, contiguous to (A), (B) a second layer comprising (d) a diffusible organic reducing agent consisting essentially of 2-methoxy-4-amino-5-methyl-N,N-dimethylaniline sulfuric acid salt monohydrate, with (e) a diffusible dye-forming coupler consisting essentially of 2-trifluoroacetamidoresorcinol, in (f) a polymeric binder consisting essentially of poly(ethylene-co-1,4-cyclohexyldimethylene-toluene-2,4-disulfonamide).

Claim 18

Dependent Claim 84 words

A photothermographic element comprising a support having thereon, in sequence, (A) a first layer comprising (a) photosensitive silver halide, in reactive association, with (b) an organic silver salt oxidizing agent consisting essentially of a 3-amino-5-benzylthio-1,2,4-triazole silver salt, in (c) a gelatino binder, and, contiguous to (A), (B) a second layer comprising (d) a diffusible organic reducing agent consisting essentially of 2-methoxy-4-amino-5-methyl-N,N-dimethylaniline sulfuric acid salt monohydrate, with (e) a diffusible dye-forming coupler consisting essentially of 2-trifluoroacetamidoresorcinol, in (f) a polymeric binder consisting essentially of poly(ethylene-co-1,4-cyclohexyldimethylene-toluene-2,4-disulfonamide).

Claim 19

Dependent Claim 61 words

In a heat developable diazotype photosensitive element comprising (A) at least one diazotype photosensitive layer, (B) at least one layer comprising a processing agent for said diazotype photosensitive layer and (C) a separation layer between (A) and (B), the improvement wherein said separation layer (C) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 20

Dependent Claim 61 words

In a heat developable diazotype photosensitive element comprising (A) at least one diazotype photosensitive layer, (B) at least one layer comprising a processing agent for said diazotype photosensitive layer and (C) a separation layer between (A) and (B), the improvement wherein said separation layer (C) comprises a polysulfonamide which has the property of producing increased preexposure storage stability for said element.

Claim 21

Dependent Claim 112 words

In a heat processable diazotype photographic element comprising, in sequence, (a) a support, having thereon (b) a first layer comprising a base-release agent which has the property of releasing base upon heating, (c) a second layer comprising a polymer that is permeable to the base from said base-release agent, (d) a third layer comprising a polysulfonamide polymer that has the property of controlling diffusion of the base from said base-release agent, (e) a fourth layer comprising a polymer that is permeable to the base from said base-release agent, and (f) a fifth layer comprising a diazotype imageforming composition that has the property of being activated by the base from said base-releasing agent.

Claim 22

Dependent Claim 112 words

In a heat processable diazotype photographic element comprising, in sequence, (a) a support, having thereon (b) a first layer comprising a base-release agent which has the property of releasing base upon heating, (c) a second layer comprising a polymer that is permeable to the base from said base-release agent, (d) a third layer comprising a polysulfonamide polymer that has the property of controlling diffusion of the base from said base-release agent, (e) a fourth layer comprising a polymer that is permeable to the base from said base-release agent, and (f) a fifth layer comprising a diazotype imageforming composition that has the property of being activated by the base from said base-releasing agent.

Claim 23

Dependent Claim 40 words

A process of producing a developed image in an exposed photothermographic element as defined in claim 1 comprising heating said element to a temperature within the range of about 125° C. to about 200° C. until said image is developed.

Claim 24

Dependent Claim 43 words

A process of producing a diazo image in an exposed heat developable diazotype photosensitive element as defined in claim 12 comprising heating said element to a temperature within the range of about 100° C. to about 150° C. until said image is developed.

Claim 25

Independent Claim 72 words

A method of providing increased preexposure stability to a photothermographic element of the type having at least one photosensitive layer comprising a diazo or silver halide photosensitive component, (B) at least one layer comprising a processing agent for said photosensitive component and (C) a separation polymer between said photosensitive component and said processing agent, comprising incorporating a polysulfonamide separation polymer into said photothermographic element between said photosensitive component and said processing agent.

Claim 26

Independent Claim 72 words

A method of providing increased preexposure stability to a photothermographic element of the type having at least one photosensitive layer comprising a diazo or silver halide photosensitive component, (B) at least one layer comprising a processing agent for said photosensitive component and (C) a separation polymer between said photosensitive component and said processing agent, comprising incorporating a polysulfonamide separation polymer into said photothermographic element between said photosensitive component and said processing agent.

Claim 27

Independent Claim 52 words

A method of providing increased preexposure stability in a photothermographic element of the type having at least one diazo or silver halide photosensitive layer and at least one layer comprising a processing agent for the photosensitive layer, comprising incorporating a polysulfonamide containing layer between the photosensitive layer and the processing agent layer.

Claim 28

Independent Claim 52 words

A method of providing increased preexposure stability in a photothermographic element of the type having at least one diazo or silver halide photosensitive layer and at least one layer comprising a processing agent for the photosensitive layer, comprising incorporating a polysulfonamide containing layer between the photosensitive layer and the processing agent layer.

Claim 29

Dependent Claim 13 words

A method as in claim 17 wherein said polysulfonamide containing layer comprises poly(ethylene-co-1,4-cyclohexyldimethylene-toluene-2,4-disulfonamide).

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-08-10	1985-02-09	1985-08-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-08-10	1989-02-09	1989-08-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-08-10	1993-02-09	1993-08-11	$7700.00	Window Closed / Lapsed

Photothermographic material and process

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