US3960908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organosilver carboxylates
Assignee: Fujifilm Holdings Corp
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Filing: 1974-01-21
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Granted: 1976-06-01
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Expires: 1994-01-21
Abstract
Abstract In a process for preparing organosilver carboxylates where an organic carboxylate aqueous solution is admixed with a water-soluble silver salt aqueous solution, a solvent which is difficultly soluble in water is present in the organic carboxylate aqueous solution. According to the process, organosilver carboxylates are obtained in the form of fine particles, which are useful for preparation of heat developable photographic materials.
Inventors
- 👤 Shinpei Ikenoue
- 👤 Takao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49809; C; C07; C07C; C07C51/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
146 words
A process for preparing organosilver carboxylates comprising mixing: a. an emulsion of a solvent having a solubility at 20°C of less than two parts by weight in 100 parts of water, which solvent is selected from the group consisting of the esters of alcohols or phenols with phosphoric acid, phthalic acid or a carboxylic acid, which are liquid at normal temperatures, aliphatic hydrocarbons and aromatic hydrocarbons, with an aqueous solution of an organic carboxylate selected from the group consisting of alkali metal, alkaline earth metal, and ammonium salts of long chain aliphatic carboxylic acids having 10 or more carbon atoms whose silver salt is relatively stable to light, and b. an aqueous solution of a silver salt having a solubility at 20°C of at least 0.2 g per 100 g of water; said mixing taking place at a temperature below the boiling point of said solvent.
Claim 2
Dependent Claim
146 words
A process for preparing organosilver carboxylates comprising mixing: a. an emulsion of a solvent having a solubility at 20°C of less than two parts by weight in 100 parts of water, which solvent is selected from the group consisting of the esters of alcohols or phenols with phosphoric acid, phthalic acid or a carboxylic acid, which are liquid at normal temperatures, aliphatic hydrocarbons and aromatic hydrocarbons, with an aqueous solution of an organic carboxylate selected from the group consisting of alkali metal, alkaline earth metal, and ammonium salts of long chain aliphatic carboxylic acids having 10 or more carbon atoms whose silver salt is relatively stable to light, and b. an aqueous solution of a silver salt having a solubility at 20°C of at least 0.2 g per 100 g of water; said mixing taking place at a temperature below the boiling point of said solvent.
Claim 3
Dependent Claim
32 words
The process as claimed in claim 1, wherein said organic carboxylate is selected from the group consisting of an alkali metal salt, or an ammonium salt of said long-chain aliphatic carboxylic acid.
Claim 4
Dependent Claim
24 words
The process as claimed in claim 2, wherein said long-chain aliphatic carboxylic acid salt is the caprate, laurate, myristate, palamitate, stearate or behenate salt.
Claim 5
Dependent Claim
23 words
The process as claimed in claim 1, wherein said organic carboxylate is an alkaline earth metal salt of said long-chain aliphatic carboxylic acid.
Claim 6
Dependent Claim
24 words
The process as claimed in claim 4, wherein said long-chain aliphatic carboxylic acid salt is the caprate, laurate, myristate, palamitate, stearate or behenate salt.
Claim 7
Dependent Claim
54 words
The process as claimed in claim 2, wherein said salt is selected from the group consisting of sodium caprate, potassium caprate, ammonium caprate, sodium laurate, potassium laurate, ammonium laurate, sodium myristate, potassium myristate, ammonium myristate, sodium palmitate, potassium palmitate, ammonium palmitate, sodium stearate, potassium stearate, ammonium stearate, sodium behenate, potassium behenate and ammonium behenate.
Claim 8
Dependent Claim
28 words
The process as claimed in claim 1, wherein said solvent is selected from the group consisting of isopropyl acetate, ethyl acetate, propyl acetate, propyl formate or methyl butyrate.
Claim 9
Dependent Claim
69 words
The process as claimed in claim 1, wherein said solvent is selected from the group consisting of tricresyl phosphate, tributyl phosphate, monooctyldibutyl phosphate, dimethyl phthalate, dioctyl phthalate, dimethoxyethyl phthalate, amyl acetate, isoamyl acetate, isobutyl acetate, 2-ethylbutyl acetate, butyl acetate, dioctyl sebacate, dibutyl sebacate, diethyl sebacate, diethyl succinate, butyl formate, amyl formate, ethyl valerate, diethyl tartrate, ethyl butyrate, butyl butyrate, isoamyl butyrate, pentane, hexane, cyclohexane, heptane, benzene, toluene, and xylene.
Claim 10
Dependent Claim
22 words
The process as claimed in claim 1, wherein said water-soluble silver salt is silver nitrate, silver perchlorate, silver sulfate or silver acetate.
Claim 11
Dependent Claim
39 words
The process as claimed in claim 1, wherein said solvent contains a compound capable of forming a silver salt by the reaction with silver ion, said compound containing a mercapto group, an imino group, or an organic carboxylic group.
Claim 12
Dependent Claim
33 words
The process as claimed in claim 10, wherein said compound capable of forming a silver salt is 1-phenyl-5-mercaptotetrazole, benzotriazole, phthaladinone, behenic acid, stearic acid, palmitic acid, myristic acid, lauric acid or capric acid.
Claim 13
Dependent Claim
69 words
The process as claimed in claim 1, including the following steps: (1) dissolving said organic carboxylate in water, (2) adding said solvent to the solution obtained in the step (1) above to form an emulsion, (3) dissolving a water-soluble silver salt in water, (4) mixing the solutions of the above steps (2) and (3) so as to and react with each other, and (5) separating the organosilver carboxylate formed.
Claim 14
Dependent Claim
21 words
The process as claimed in claim 2, wherein said organic carboxylate is an alkali metal salt of said long-chain carboxylic acid.
Claim 15
Dependent Claim
22 words
The process as claimed in claim 1, wherein said mixing takes place at a temperature in the range of -10° to 70°C.
Claim 16
Dependent Claim
20 words
The process as claimed in claim 1, wherein the concentration of silver salt in (b) is from 0.01 to 6N.
Claim 17
Dependent Claim
20 words
The process as claimed in claim 15, wherein the concentration of silver salt in (b) is from 0.1 to 4N.
Claim 18
Dependent Claim
27 words
The process as claimed in claim 1, wherein the concentration of organic carboxylate in the aqueous solution of (a) is from 0.05 to 50 percent by weight.
Claim 19
Dependent Claim
27 words
The process as claimed in claim 17, wherein the concentration of organic carboxylate in the aqueous solution of (a) is from 0.1 to 30 percent by weight.
Claim 20
Dependent Claim
36 words
The process as claimed in claim 10 wherein said compound capable of forming a silver salt is present in an amount of about 10 - 6 to 10 - 1 mol per mol of silver ion.
Claim 21
Dependent Claim
37 words
The process as claimed in claim 19 wherein said compound capable of forming a silver salt is present in an amount of from about 10 - 4 to 10 - 2 mol per mol of silver ion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |