Organotellurium (II) and (IV) compounds in heat-developable imaging materials and process with physically developable nuclei
AssigneeEastman Kodak Company
InventorsMark Lelental, Henry J. Gysling
Life of this patent
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Abstract
An imaging combination comprising (i) a tellurium (II) or (IV) compound as an oxidizing agent and (ii) a reducing agent provides an improved amplified image. This imaging combination is useful in heat-developable materials containing sources of physically developable nuclei. A developed image can be provided in the material containing the developable nuclei and can be provided by heating the element to moderately elevated temperatures.
Claims21
A heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable metal nuclei selected from the group consisting of chromium, iron, cobalt, nickel, copper, cadmium, selenium, palladium, silver, tin, tellurium, iridium, ruthenium, rhenium, platinum, gold and lead nuclei and combinations of said nuclei,
- b. an oxidation-reduction image-forming combination comprising
- i. an orgnotellurium (II) or (IV) compound as an oxidizing agent, and
- ii. a reducing agent, and
- c. a binder.
In a heat developable, imaging composition comprising
- a. physically developable metal nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a non-silver metal compound as an oxidizing agent, and
- ii. a reducing agent, and
- c. a binder,
- the improvement wherein said non-silver metal compound as an oxidizing agent consists essentially of an organotellurium (II) or (IV) compound.
In a heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable metal nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a non-silver metal compound as an oxidizing agent, and
- ii. a reducing agent, and
- c. a binder,
- the improvement wherein said non-silver metal compound as an oxidizing agent consists essentially of an organotellurium (II) or (IV) compound.
A heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a tellurium bis(diethyl dithiocarbamate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder.
A heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a tellurium di(isopropyl xanthate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder.
A heat developable, imaging composition comprising
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a tellurium bis(diethyl dithiocarbamate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder.
A heat developable, imaging composition comprising
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising:
- i. a tellurium di(isopropyl xanthate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder.
A process of developing an image in a heat developable, imaging element comprising a support having thereon, in reactive association,
- a. physically developable metal nuclei selected from the group consisting of copper, tellurium, palladium and silver nuclei and combinations of such nuclei,
- b. an oxidation-reduction image-forming combination comprising
- i. an organotellurium compound as an oxidizing agent and which is selected from the group consisting of
- Te(S.sub.2 COCH.sub.3).sub.2,
- Te(S.sub.2 COC.sub.2 H.sub.5).sub.2,
- Te(S.sub.2 P(C.sub.6 H.sub.11).sub.2).sub.2,
- Te(S.sub.2 COC.sub.10 H.sub.21).sub.2,
- Te(S.sub.2 P(OC.sub.6 H.sub.5).sub.2).sub.2,
- Te(S.sub.2 P(OC.sub.2 H.sub.5).sub.2).sub.2,
- Te(S.sub.2 CN(C.sub.2 H.sub.5).sub.2).sub.2,
- Te(S.sub.2 CN(CH.sub.2 C.sub.6 H.sub.5).sub.2).sub.2,
- Te(p-CH.sub.3 O-C.sub.6 H.sub.4).sub.2,
- C.sub.6 h.sub.5 teTeC.sub.6 H.sub.5,
- Te(p-CH.sub.3 O-C.sub.6 H.sub.4).sub.3 Cl,
- Te(C.sub.6 H.sub.4 OCH.sub.3).sub.2 Cl.sub.2,
- TeCl.sub.2 (CH.sub.2 C(O)-o-CH.sub.3 O-C.sub.6 H.sub.4).sub.2,
- TeBr.sub.2 (CH.sub.2 C.sub.6 H.sub.5).sub.2,
- Te(S.sub.2 COC.sub.5 H.sub.11).sub.2, and
- Te(S.sub.2 COCH(CH.sub.3).sub.2).sub.2,
- ii. an organic reducing agent, and
- c. a polymeric binder,
- comprising heating said element to within the range of about 80.degree. C. to about 220.degree. C. for about 1 to about 30 seconds.
A process of developing an image in a heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising
- i. a tellurium bis(diethyl dithiocarbamate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder,
- comprising heating said element to within the range of about 100.degree. C. to about 170.degree. C. for about 1 to about 10 seconds.
A process of developing an image in a heat developable, imaging element comprising a support having thereon in reactive association
- a. physically developable silver nuclei,
- b. an oxidation-reduction image-forming combination comprising
- i. a tellurium di(isopropyl xanthate) oxidizing agent, and
- ii. a pyrazolidone reducing agent, and
- c. a polymeric binder,
- comprising heating said element to within the range of about 100.degree. C. to about 170.degree. C. for about 1 to about 10 seconds.
Dependencies are inferred from the claim text.