US2604399A - Photographic developers comprising bis-(di-hydroxyalkyl aminomethyl)-hydroquinones - Google Patents
Photographic developers comprising bis-(di-hydroxyalkyl aminomethyl)-hydroquinones Download PDFInfo
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- US2604399A US2604399A US103532A US10353249A US2604399A US 2604399 A US2604399 A US 2604399A US 103532 A US103532 A US 103532A US 10353249 A US10353249 A US 10353249A US 2604399 A US2604399 A US 2604399A
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- photographic
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- hydroquinone
- hydroxyalkyl
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- 239000003795 chemical substances by application Substances 0.000 claims description 15
- -1 SILVER HALIDE Chemical class 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 12
- 239000004332 silver Substances 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 11
- 239000000243 solution Substances 0.000 description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 150000005208 1,4-dihydroxybenzenes Chemical class 0.000 description 6
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 5
- 239000008247 solid mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- QQHKOGCKEXOGGP-UHFFFAOYSA-N C(C(=O)O)(=O)O.C1(O)=CC=C(O)C=C1 Chemical compound C(C(=O)O)(=O)O.C1(O)=CC=C(O)C=C1 QQHKOGCKEXOGGP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- ZFIQGRISGKSVAG-UHFFFAOYSA-N 4-methylaminophenol Chemical compound CNC1=CC=C(O)C=C1 ZFIQGRISGKSVAG-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- 229940043276 diisopropanolamine Drugs 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- LJOQGZACKSYWCH-WZBLMQSHSA-N hydroquinine Chemical compound C1=C(OC)C=C2C([C@@H](O)[C@@H]3C[C@@H]4CCN3C[C@@H]4CC)=CC=NC2=C1 LJOQGZACKSYWCH-WZBLMQSHSA-N 0.000 description 1
- 229960004251 hydroquinine Drugs 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 125000005429 oxyalkyl group Chemical group 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 210000002268 wool Anatomy 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/135—Cine film
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/167—X-ray
Definitions
- This invention relatesto photographic developers and-more particularly to photographic developing solutions.
- aqueous photographic developer solutions comprising hydroquinone and Elon, give rise. to the formation of a precipitate after-the solutions have been allowed to stand for-a time.
- Photographic developers which possess this desired water solubility would represent a substantial advance in the art, if such developers retained muchof the developing activity exercised byr hydroquinone.
- an object of our invention to provide photographic developers which possess Water solubility of a high degree.
- a further object is to provide photographic developerswhich, in addition to having a high degree of water solubility, have suflicient developing activity (ability to reduce silver halide) to warrant their use in developing solutions.
- R and R1 each represents a hydroxyalkyl group containing from 2 to 3 carbon atoms, Compounds represented by the, above formula which have been. found to' be especially 12 Claims.
- Photographic developer formulas other than those illustrated above can beemployed to advantage. Both the amount and type of hydroquinine developing agent can be varied to suit the requirements of the operator. The above formulas are merely illustrative'and are'not intended to limit our invention.
- the developing agents represented: by the above general formula are especially useful in the preparation of concentrated .photographic W developer formulas which find use in the field of The developers coming X-ray photography. within the scope of the present invention are characterized by their excellent solubility in water, a property which is much desired for such concentrated photographic. formulas. Whereas the conventional I-IQ-MQ (hydroquinone-Elon) concentrated developer solutions give rise to precipitates on standing, the developer solutions of the present invention donot show a precipitate at even higher concentrations.
- Typical concentrated developer formulas in which the hydroquinone compounds of our invention can be used includethose illustrated in the application of F. R. Bean; 'Serial'No. 94,510,'filed May 20, 1949, now U. S.
- Patent 2,578,281 issued December 11,. 1951.
- Such solutions generally comprise from about 50 to '75 grams of phenolic developer per liter of solution, although many of the hydroquinone compounds of, our invention permit even higher concentrations of phenolic developers to be used.
- the hydroquinone compounds represented by the above general formula can also be usedin tanning developer solutions, although usually less efiicaciously than hydroquinone itself, we have found.
- hydroquinone compounds useful in practicing our invention can be prepared by interacting hydroquinone, formaldehyde and other hydroalkylamines in the manner described above.
- the hydroquinone compounds of our invention can be mixed with the usual strongly alkaline v ber, resins, etc.
- the bis-Edi (hydroxyalkyl) aminomethyllhydroguinones of our invention can also be used as oxidationinhibitorsj for gasoline, fatty oils, rub- They can also'be efiicaciously used'in processes for oxidatively dyeing wool or fur, e. g. in the former their dilute aqueous alkaline. solutions (or bysoaking the object to be dyed in an alcoholic solution of the hydro wherein R and R1 represents a hydr'oxyalkyl group ⁇ f 2.
- a photographic silver halide developer solution comprising as the active developing agent an acid addition salt of a compound selected from those represented by the following general formula:
- a photographic silver halide developer solution comprising as the active developing agent an acid addition salt of a compound selected from those represented by the following general formula:
- R and R1 each represents a p-hydroxyalkyl group containing from 2 to 3 carbon atoms.
- a photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
- a photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
- a photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
- a solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general formula:
- R and R1 each represents a hydroxyalkyl group, and a strongly alkaline material.
- a solid mixture of chemicals useful for forming a photographic silver halide developer solu tion by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general'formula:
- R and R1 each represents a hydroxyalkyl group containing from 2 to 3 carbon atoms, and a strongly alkaline material.
- a solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general formula:
- a solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of the compound represented by the following formula:
- a solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of the compound represented by the following formula:
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Patented July 22, 1952 PHOTOGRAPHIC DEVELOPERS COMPRISING BIS- (DI HYDROXYALKYL AMINOMETIL. YL) -HYDROQUINON ES Thomas S. Donovan and Frederic R. Bean, Rochester, N. Y., assignors to Eastman Kodak Company, Rochester, N.
Jersey Y., a corporation of New 'No Drawing. Application July 7,1949,
Serial No. 103,532
This invention relatesto photographic developers and-more particularly to photographic developing solutions.
Prominent among the developing agents now 'empolyed in the rapid development of 'photographic images are those comprising hydroquinone and Elon (p -N-methylaminophenol). While various formulas of these developers are excellently suited for general" photographic use, they have notbeen outstanding where developers: ofincreased water solubility are: required. 7
For example, certain aqueous photographic developer solutions comprising hydroquinone and Elon, give rise. to the formation of a precipitate after-the solutions have been allowed to stand for-a time. s
Photographic developers which possess this desired water solubility would represent a substantial advance in the art, if such developers retained muchof the developing activity exercised byr hydroquinone.
It is, therefore, an object of our invention to provide photographic developers which possess Water solubility of a high degree. A further object is to provide photographic developerswhich, in addition to having a high degree of water solubility, have suflicient developing activity (ability to reduce silver halide) to warrant their use in developing solutions. Other objects will become apparent from the following description and examples.
According to our invention we accomplish the above objects by providing photographic developer solutions comprising a bis-[di-(hydroxyalkyl) aminomethyl] hydroquinone.
The bis- [di- (hydroxyalkyl) aminomethyllhydroquinones useful in practicing our invention can advantageously be represented by the following general formula:
wherein R and R1 each represents a hydroxyalkyl group containing from 2 to 3 carbon atoms, Compounds represented by the, above formula which have been. found to' be especially 12 Claims.
useful for the purposes of our invention include those represented by the following formulas:
I CHiCHr-OH $Hs HO-CHCH:
NCH
HO-CHCH I OH. CH: 1
2,=-bis-[di- (B-hydroxyisopropyl) aminomethyl hydroqumone on I l omcnlcm on *CHr-N photographic developer formula useful in prac-' ticing our invention:
EXAMPLEI Elon ('p-(N methylarnino) phenol) grams 2.5 2,5-bis- [di (flhydroxyethyl) aminomethyl] hydroquinone oxalate grams 2.5
Sodium sulfite (anhydrous) do 75.0 Sodium carbonate (anhydrous) do 25.0 Potassium bromide do 1.5 Water to liters 1.0
This developer solution was used to develop 5'0 motion-picture positive-film;
The compounds represented j' by the above 3 EXAMPLEZ Another formula which has been found useful in practicing our invention is:
2,5-bis- [di- (flhydroxyethyl) aminomethyll hydroquinone oxlate grams 5.0 Sodium sulfite (anhydrous) do 75.0 Sodium carbonate (anhydrous) do 25.0 Potassium 'bromide i do 1.5 Water to; i liters 1.0
Photographic developer formulas other than those illustrated above can beemployed to advantage. Both the amount and type of hydroquinine developing agent can be varied to suit the requirements of the operator. The above formulas are merely illustrative'and are'not intended to limit our invention. I
The developing agents represented: by the above general formula are especially useful in the preparation of concentrated .photographic W developer formulas which find use in the field of The developers coming X-ray photography. within the scope of the present invention are characterized by their excellent solubility in water, a property which is much desired for such concentrated photographic. formulas. Whereas the conventional I-IQ-MQ (hydroquinone-Elon) concentrated developer solutions give rise to precipitates on standing, the developer solutions of the present invention donot show a precipitate at even higher concentrations. Typical concentrated developer formulas in which the hydroquinone compounds of our invention can be used includethose illustrated in the application of F. R. Bean; 'Serial'No. 94,510,'filed May 20, 1949, now U. S. Patent 2,578,281, issued December 11,. 1951. Such solutions generally comprise from about 50 to '75 grams of phenolic developer per liter of solution, although many of the hydroquinone compounds of, our invention permit even higher concentrations of phenolic developers to be used. The hydroquinone compounds represented by the above general formula can also be usedin tanning developer solutions, although usually less efiicaciously than hydroquinone itself, we have found.
The'following examples illustrate the method of preparation of typical hydroquinone compounds coming within the scope of our invention.
EXAMPLE 3 2,5 bisldi- (fi-hydhozyeth'ylamz'no) ethyl] hydroquinone oxalate 55 g. of hydroquinonewere dissolved in 125 cc. of water and 105 g'. of diethanolamine were added. The solution-was cooled-to C., 87 cc. of a 37 per cent formalin solution were added dropwise with stirring over a period of 30 minutes, and the solution was then stirred at room temperature for an additional hour. The reaction mixture was concentrated under. a vacuum to a thin syrup, 500 cc. of acetone added, and the acetone solution made acid to Congo Red with oxalic acid. The product crystallized as fine, white prisms melting at 196197 C. (with decomposition) They were very soluble in water.
2,5-bis Edi-(13 hydroxyisopropyl) aminom ethyll hydroquinone a 28 g. of hydroquinone were dissolved in 125 cc.
of a 75% solution of ethyl alcohol, and-7'7 g. of diisopropanolamine were added. "The solution was cooled to 15 C,., and 44 cc. of 37 per cent formalin were added dropwise with stirring. The mixture was then warmed on a steam bath for 30 minutes and the alcohol removed by evaporation. Thesyrupy residue was taken up in 150 cc. of water, the solution treated with decolorizing carbon and filtered. From the filtrate, on standing, there separated a tan crystalline solid which wasrecrystalizd' from ethanol. The crystals melted at 180-'182 (land were soluble in water, acids, alkalies, and alcohol. They were essentially insoluble in ether or benzene.
-- Other hydroquinone compounds useful in practicing our invention can be prepared by interacting hydroquinone, formaldehyde and other hydroalkylamines in the manner described above. The hydroquinone compounds of our invention can be mixed with the usual strongly alkaline v ber, resins, etc.
'materials employed in photographic developer solutions to give a dry mixture, and this mixture can then be dissolved in water to give a solution useful in preparing the desired developing formulas, i. e. the usual constituents employed in photographic formulas can then be added. The ratio of materials added to the mixture correspond to those given in the above formulas, although other known ratios of developing agent to alkali can be used to advantage, as. set forth above, the particular'ratios desired can be varied to suit the requirements of the operator.
The bis-Edi (hydroxyalkyl) aminomethyllhydroguinones of our invention can also be used as oxidationinhibitorsj for gasoline, fatty oils, rub- They can also'be efiicaciously used'in processes for oxidatively dyeing wool or fur, e. g. in the former their dilute aqueous alkaline. solutions (or bysoaking the object to be dyed in an alcoholic solution of the hydro wherein R and R1 represents a hydr'oxyalkyl group} f 2. A photographic silver halide developer solution comprising as the active developing agent an acid addition salt of a compound selected from those represented by the following general formula:
R om-N N-CHa R, DELL} wherein R and R1each representsa-hydroxalkyl group containing from 2 to '3 'carbon'atoms.
3. A photographic silver halide developer solution comprising as the active developing agent an acid addition salt of a compound selected from those represented by the following general formula:
wherein R and R1 each represents a p-hydroxyalkyl group containing from 2 to 3 carbon atoms.
4. A photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
HO-CHzCH1 CHaCHr-OH N-CH HO-CHzCHa 5. A photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
OH: OH
CHzCH-OH OH:
| CHg-N HO-CHCH;
OHaCH-OH N-CHz CHI HO-OHC 6. A photographic silver halide developer solution comprising as the active developing agent an acid addition salt of the compound represented by the following formula:
CHr-N N-CH HO-CHzCHzCHg 7. A solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general formula:
CHz-N wherein R and R1 each represents a hydroxyalkyl group, and a strongly alkaline material.
8. A solid mixture of chemicals useful for forming a photographic silver halide developer solu tion by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general'formula:
wherein R and R1 each represents a hydroxyalkyl group containing from 2 to 3 carbon atoms, and a strongly alkaline material.
9. A solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of a compound selected from those represented by the following general formula:
CH2--N/ o aCHa-OH CHr-N HO-CHzOHz and a strongly alkaline material.
11. A solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of the compound represented by the following formula:
CH2 H-OH CH: CH
HO-JJHCHa CHzCH-OH N--CH2 OH: H 0-030 2 0H Ha and a strongly alkaline material.
12. A solid mixture of chemicals useful for forming a photographic silver halide developer solution by dissolving in water comprising as a developing agent an acid addition salt of the compound represented by the following formula:
l CHgOHzCHg-OH HO-CHzCHzCHr N-CHa BIO-OHzCH OH;
and a strongly alkaline material.
THOMAS S. DONOVAN. FREDERIC R. BEAN.
(References on followingpage) 2,304,953 Peterson Dec.15, 1942 7; 8.; REFERENCES CITED V',OfI-I-IER ;EEFERENCES The following references are of record in the Henn'eyf a hd; Dufilefl- Handbook of Pho file of this patent: tography, McGraw HilLNew York, 1939; pages- UNITED STATES PATENTS 5 328, 2 ,and 334 cited. r w 1 Number Name Date 2,163,166 Wilmanns et a1 June 20, 1939
Claims (1)
1. A PHOTOGRAPHIC SILVER HALIDE DEVELOPER SOLUTION COMPRISING AS THE ACTIVE DEVELOPING AGENT AN ACID ADDITION SALT OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US103532A US2604399A (en) | 1949-07-07 | 1949-07-07 | Photographic developers comprising bis-(di-hydroxyalkyl aminomethyl)-hydroquinones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US103532A US2604399A (en) | 1949-07-07 | 1949-07-07 | Photographic developers comprising bis-(di-hydroxyalkyl aminomethyl)-hydroquinones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2604399A true US2604399A (en) | 1952-07-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US103532A Expired - Lifetime US2604399A (en) | 1949-07-07 | 1949-07-07 | Photographic developers comprising bis-(di-hydroxyalkyl aminomethyl)-hydroquinones |
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| Country | Link |
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| US (1) | US2604399A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2790830A (en) * | 1954-10-21 | 1957-04-30 | Pittsburgh Plate Glass Co | Nu-aminoalkanol substituted alkylaromatic compounds |
| US2949359A (en) * | 1957-08-26 | 1960-08-16 | Polaroid Corp | Process for developing silver halide emulsions |
| US2959618A (en) * | 1958-06-09 | 1960-11-08 | Wyandotte Chemicals Corp | m- and p-xylylene-di |
| US2962531A (en) * | 1955-09-23 | 1960-11-29 | Ethyl Corp | 3, 5-dialkyl-4-hydroxy benzylamines |
| US2998452A (en) * | 1958-03-07 | 1961-08-29 | Olin Mathieson | Surface-active basic polyethers |
| US3061434A (en) * | 1957-08-26 | 1962-10-30 | Polaroid Corp | Novel substituted silver halide developing agents |
| US3143572A (en) * | 1959-10-08 | 1964-08-04 | Sterling Drug Inc | Nu, nu'-disubstituted-bis (aminomethyl) benzenes |
| US3255206A (en) * | 1962-10-23 | 1966-06-07 | Polaroid Corp | 2, 3-anthraquinone-dicarboximide dye developers |
| US4383102A (en) * | 1982-01-29 | 1983-05-10 | Texaco Inc. | Method for producing a low viscosity spray polyol by reacting an alkylene oxide with the reaction product of a phenol, an amine and a smaller formaldehyde portion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2163166A (en) * | 1936-05-27 | 1939-06-20 | Agfa Ansco Corp | Photographic developer |
| US2304953A (en) * | 1941-08-08 | 1942-12-15 | Eastman Kodak Co | Photographic developer |
-
1949
- 1949-07-07 US US103532A patent/US2604399A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2163166A (en) * | 1936-05-27 | 1939-06-20 | Agfa Ansco Corp | Photographic developer |
| US2304953A (en) * | 1941-08-08 | 1942-12-15 | Eastman Kodak Co | Photographic developer |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2790830A (en) * | 1954-10-21 | 1957-04-30 | Pittsburgh Plate Glass Co | Nu-aminoalkanol substituted alkylaromatic compounds |
| US2962531A (en) * | 1955-09-23 | 1960-11-29 | Ethyl Corp | 3, 5-dialkyl-4-hydroxy benzylamines |
| US2949359A (en) * | 1957-08-26 | 1960-08-16 | Polaroid Corp | Process for developing silver halide emulsions |
| US3061434A (en) * | 1957-08-26 | 1962-10-30 | Polaroid Corp | Novel substituted silver halide developing agents |
| US2998452A (en) * | 1958-03-07 | 1961-08-29 | Olin Mathieson | Surface-active basic polyethers |
| US2959618A (en) * | 1958-06-09 | 1960-11-08 | Wyandotte Chemicals Corp | m- and p-xylylene-di |
| US3143572A (en) * | 1959-10-08 | 1964-08-04 | Sterling Drug Inc | Nu, nu'-disubstituted-bis (aminomethyl) benzenes |
| US3255206A (en) * | 1962-10-23 | 1966-06-07 | Polaroid Corp | 2, 3-anthraquinone-dicarboximide dye developers |
| US4383102A (en) * | 1982-01-29 | 1983-05-10 | Texaco Inc. | Method for producing a low viscosity spray polyol by reacting an alkylene oxide with the reaction product of a phenol, an amine and a smaller formaldehyde portion |
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