US2758028A - Photothermographic substance - Google Patents
Photothermographic substance Download PDFInfo
- Publication number
- US2758028A US2758028A US496356A US49635655A US2758028A US 2758028 A US2758028 A US 2758028A US 496356 A US496356 A US 496356A US 49635655 A US49635655 A US 49635655A US 2758028 A US2758028 A US 2758028A
- Authority
- US
- United States
- Prior art keywords
- photothermographic
- benzamidoxime
- substance
- light
- silver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000126 substance Substances 0.000 title description 7
- MXOQNVMDKHLYCZ-UHFFFAOYSA-N benzamidoxime Chemical compound ON=C(N)C1=CC=CC=C1 MXOQNVMDKHLYCZ-UHFFFAOYSA-N 0.000 claims description 8
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000084 colloidal system Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 3
- 239000008273 gelatin Substances 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 235000011852 gelatine desserts Nutrition 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 206010034960 Photophobia Diseases 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- -1 silver benzamidoxime Chemical compound 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/494—Silver salt compositions other than silver halide emulsions; Photothermographic systems ; Thermographic systems using noble metal compounds
- G03C1/498—Photothermographic systems, e.g. dry silver
- G03C1/49809—Organic silver compounds
Definitions
- This invention relates to new photothermograp'hic substances and to photographic layers sensitized with the new photothermographic substances.
- photothermographic has been defined in U. S. Patent 2,095,839 as characterizing a material which after its exposure to light may be decomposed or modified by the action of heat difierentially in accordance with the exposure to light.
- a photographic layer sensitized with such photothermographic substances is therefore, after exposure to light, developable by heat.
- the present invention is based on the discovery that the silver salt of benzamidoxime is a valuable thermographic substance which will produce after exposure to light and subsequent to heat treatment a visible record of the incident light.
- the photothermographic substances according to the invention may be dispersed in any suitable colloidal carrier to produce a photothermographic layer on one of the conventional supports.
- the material for the photographic layer may consist of gelatin, casein, agar, and various natural or synthetic high polymers such as the already mentioned polystyrene or phenol formaldehyde resins, vinyl resins, alkyd resins, etc.
- the support for the photographic layer may be a plate of any of the commonly used materials such as glass, paper, cellulose derivatives, etc.
- the light sensitivity of the silver salt of benzamidoxime will depend, like in the case of the silver salts described in the parent application, (a) on the variation ratio of silver nitrate to benzamidoxime, (b) on the type of gelatin used to disperse the silver salts, and (c) the variation in the ratio of silver salts to gelatin in the emulsions.
- a photothermographic element comprising a support and a photothermographic layer comprising an organic colloid carrier having dispersed therein the silver salt of benzamidoxime.
- a photothermographic element comprising an organic colloid carrier having dispersed therein the silver salt of benzamidoxime.
Description
United States Patent PHOTOTHERMOGRAPHIC SUBSTANCE Marilyn Levy, Red Bank, N. J., and Heinz Schulze, Binghamton, N. Y., assignors to the United States of America as represented by the Secretary of the Army No Drawing. Original application June 29, 1954, Serial No. 440,308. Divided and this application March 8, 1955, Serial No. 496,356
2 Claims. (Cl. 95-7) (Granted under Title 35, U. S. Code (1952), see. 266) The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment of any royalty thereon.
This invention relates to new photothermograp'hic substances and to photographic layers sensitized with the new photothermographic substances.
The term photothermographic has been defined in U. S. Patent 2,095,839 as characterizing a material which after its exposure to light may be decomposed or modified by the action of heat difierentially in accordance with the exposure to light. A photographic layer sensitized with such photothermographic substances is therefore, after exposure to light, developable by heat.
The present invention is based on the discovery that the silver salt of benzamidoxime is a valuable thermographic substance which will produce after exposure to light and subsequent to heat treatment a visible record of the incident light.
The invention will become more apparent from the description of an embodiment of the broad inventive idea.
Preparation of the silver salt of benzamidoxime:
=NOH CsHsC --NHa Dissolve 2.72 grams of benzamidoxime in 50 ml. of Water on a water bath. Cool to approximately 25 C. Dissolve separately 3.40 grams AgNOa in m1. H20 and add 3 ml. ammonium hydroxide (26 B.) so that any precipitate which may first form again dissolves; cool this second solution to 25 C. and dump it into the first solution. The precipitate now formed is filtered and washed with 20 ml. of water to which 0.6 ml. NH3 (26 B.) was added. The precipitate was dried over night in a vacuum desiccator over calcium chloride. The compound remains white after this period of time but decomposes rapidly even if stored in the dark.
Since the silver benzamidoxime is decomposed by water, it was necessary to disperse this salt in a vehicle of polystyrene dissolved in benzene. The mixture was coated on glass slides and dried over night in the dark. The slides were exposed to light and thermally developed at C.
The photothermographic substances according to the invention may be dispersed in any suitable colloidal carrier to produce a photothermographic layer on one of the conventional supports. The material for the photographic layer may consist of gelatin, casein, agar, and various natural or synthetic high polymers such as the already mentioned polystyrene or phenol formaldehyde resins, vinyl resins, alkyd resins, etc. The support for the photographic layer may be a plate of any of the commonly used materials such as glass, paper, cellulose derivatives, etc.
As described in the parent application Serial No.
440,308, filed June 29, 1954, of which this application is a division, the light sensitivity of the silver salt of benzamidoxime will depend, like in the case of the silver salts described in the parent application, (a) on the variation ratio of silver nitrate to benzamidoxime, (b) on the type of gelatin used to disperse the silver salts, and (c) the variation in the ratio of silver salts to gelatin in the emulsions.
It will be obvious to those skilled in the art that a great many variations and combinations of the described processes are possible within the broad inventive idea as characterized in the appended claims.
What is claimed is:
l. A photothermographic element comprising a support and a photothermographic layer comprising an organic colloid carrier having dispersed therein the silver salt of benzamidoxime.
2. A photothermographic element comprising an organic colloid carrier having dispersed therein the silver salt of benzamidoxime.
References Cited in the file of this patent UNITED STATES PATENTS 2,095,839 Sheppard et al Oct. 12, 1937
Claims (1)
1. A PHOTOTHERMOGRAPHIC ELEMENT COMPRISING A SUPPORT AND A PHOTOETHERMOGRAPHIC LAYER COMPRISING AN ORGANIC COLLOID CARRIER HAVING DISPERSED THEREIN THE SILVER SALT OF BENZAMIDOXIME.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US496356A US2758028A (en) | 1954-06-29 | 1955-03-08 | Photothermographic substance |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US440308A US2759819A (en) | 1954-06-29 | 1954-06-29 | Photothermographic substance |
| US496356A US2758028A (en) | 1954-06-29 | 1955-03-08 | Photothermographic substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2758028A true US2758028A (en) | 1956-08-07 |
Family
ID=27032379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US496356A Expired - Lifetime US2758028A (en) | 1954-06-29 | 1955-03-08 | Photothermographic substance |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2758028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2918366A (en) * | 1957-04-17 | 1959-12-22 | Archie G Buyers | Decontamination of neutron-irradiated reactor fuel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2095839A (en) * | 1935-09-27 | 1937-10-12 | Eastman Kodak Co | Photothermographic composition |
-
1955
- 1955-03-08 US US496356A patent/US2758028A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2095839A (en) * | 1935-09-27 | 1937-10-12 | Eastman Kodak Co | Photothermographic composition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2918366A (en) * | 1957-04-17 | 1959-12-22 | Archie G Buyers | Decontamination of neutron-irradiated reactor fuel |
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