US2060596A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2060596A US2060596A US21976A US2197635A US2060596A US 2060596 A US2060596 A US 2060596A US 21976 A US21976 A US 21976A US 2197635 A US2197635 A US 2197635A US 2060596 A US2060596 A US 2060596A
- Authority
- US
- United States
- Prior art keywords
- amino
- photographic
- group
- methylamino
- photographic developer
- 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
- 239000003513 alkali Substances 0.000 description 7
- 125000003277 amino group Chemical group 0.000 description 7
- XIWMTQIUUWJNRP-UHFFFAOYSA-N amidol Chemical compound NC1=CC=C(O)C(N)=C1 XIWMTQIUUWJNRP-UHFFFAOYSA-N 0.000 description 6
- JHKKTXXMAQLGJB-UHFFFAOYSA-N 2-(methylamino)phenol Chemical group CNC1=CC=CC=C1O JHKKTXXMAQLGJB-UHFFFAOYSA-N 0.000 description 4
- 125000004663 dialkyl amino group Chemical group 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- -1 silver halide Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- SRCQQKFHSKCPGH-UHFFFAOYSA-N 2-amino-4-methyl-6-(methylamino)phenol Chemical compound CNC1=CC(C)=CC(N)=C1O SRCQQKFHSKCPGH-UHFFFAOYSA-N 0.000 description 2
- MAAWICPSBCHRQR-UHFFFAOYSA-N 4-amino-2-methyl-6-(methylamino)phenol Chemical compound CNC1=CC(N)=CC(C)=C1O MAAWICPSBCHRQR-UHFFFAOYSA-N 0.000 description 2
- ODCGBUMJJJMWBJ-UHFFFAOYSA-N 5-(dimethylamino)-2-(methylamino)phenol Chemical compound CNC1=CC=C(N(C)C)C=C1O ODCGBUMJJJMWBJ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229960000443 hydrochloric acid Drugs 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 150000005451 methyl sulfates Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/30—Developers
- G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
Definitions
- One of its objects is a group of new photographic developers. Another object is a group 01' photographic developers which can be used without the addition of alkali. Still another object is a group'of photographic developers'which can be used with or without the addition oi alkali. Further objects will be seen from the detailed specification following hereafter.-
- alkaline developers are generally used.
- An exception is amidol, which can be made up into a developer only with suiflte.
- Amidol however, has various disadvantages. 0n the one hand a developer prepared with it is easily susceptible to oxidation on exposure to air and is therefore oi poor stability; furthermore amidol becomes intensely colored when it is brought into contact with alkali.
- a developer in accordance with the invention comprises an amino-substituted 2-methylaminophenol, for example, .4-amino-2-methylaminophenol, 5-dimethylamino-2-methylamino-phenol, 4-amino-6-methyl-2-methylamino phenol or 6- amino-4-methyl-z-methylamino-phenol.
- Such products may be obtained, for example, by fission of amino substituted Z-methyI-benzoxazole di-' methyl sulfates with caustic soda solution and subsequent saponiilcation oi the acetyl compound by means of hydro-chloric acid.
- the 2-methylamino-phenols substituted by an amino-group or by a dialkylamino-group excel amidol in particular in the speed of development.
- di-substituted bodies have, when the substituents are in suitable positions, the remarkable advantage that they are very insensitive towards atmospheric oxidation and therefore yield developers which are stable for long periods.
- E's-ample 1 200 cc. 0! water 5 grams atsodium suliite 1 gram ofa-dimethylamino-z-methylaminophgnd fl' T
- Example 2 200 cc. of water 5 grams of sodium sulflte 1 gram oi 4-amino-6-methyl-2-methylamino-phenol.
- Example 3 200 cc. of water 5 grams of sodium sulflte m 1 gram of 6-amino-4-methyl-2-methylamino-phenol.
- a photographic developer including va. 2- methyiaminophenol containing in its nucleus a radical selected from the group consisting of amino groups and dialkylamino groups.
- a photographic developer including a 2- methylaminophenol' containing in its nucleus a radical selected from thegroup consisting 01' amino groups and dialkylamino groups without an alkali.
- a photographic developer including a 2- methylaminophenol containing in its nucleus besides a 'radical selected from the group consisting of amino groups and dialkylamino groups a radical selected from the group consisting of halide and alkyl.
- a photographic developer including a 2- methylaminophenol containing in its nucleus be- 40 sides a radical selected from the group consisting of amino groups and dialkyl'amino groups a radical selected from the group consisting of halide, alkyl and an alkali.
- a photographic developer including 5-dimethylamino-2-methylamino-phenol.
- a photographic developer including 4-amino-B-methyl-2-methylamino-phenol.
- a photographic developer including 6-amino-4--methyl-2-methylamino-phenol.
- WILHEIM SCHNEIDER GUSTAV WIIMANNB.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2060596X | 1934-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2060596A true US2060596A (en) | 1936-11-10 |
Family
ID=7983080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US21976A Expired - Lifetime US2060596A (en) | 1934-06-09 | 1935-05-17 | Photographic developer |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2060596A (en, 2012) |
| BE (1) | BE409796A (en, 2012) |
| FR (1) | FR790677A (en, 2012) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549364A (en) * | 1965-03-08 | 1970-12-22 | Polaroid Corp | Photographic processes and compositions |
-
0
- BE BE409796D patent/BE409796A/xx unknown
-
1935
- 1935-05-17 US US21976A patent/US2060596A/en not_active Expired - Lifetime
- 1935-05-29 FR FR790677D patent/FR790677A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549364A (en) * | 1965-03-08 | 1970-12-22 | Polaroid Corp | Photographic processes and compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| FR790677A (fr) | 1935-11-25 |
| BE409796A (en, 2012) |
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