US3728367A
Expired / Lapsed
US
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Solution containing a trivalent antimony-tartaric acid compound
Assignee: EIDP Inc
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Filing: 1970-11-30
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Granted: 1973-04-17
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Expires: 1990-11-30
Abstract
Abstract Solutions of monomeric trivalent antimony-tartaric acid compounds having a molar ratio of antimony to tartaric acid of 1 to 1 to 2 to 1 stabilized with an anion such as chloride in certain polar organic solvents are useful for incorporating flame-retarding antimony compounds into polymeric articles.
Inventors
- 👤 P Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/90; C07F9/902; C07C; C07C59/00; C07C59/235; C07C59/245; C07C59/255; C08; C08K; C08K5/00; C08K5/59
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
The solution of claim 1 wherein said polar organic solvent is selected from the group consisting of dimethyl formamide, dimethyl sulfoxide, formamide, monomethyl formamide, acetamide, formic acid, ethylene glycol, diethylene glycol, glycerol and propanediol.
Claim 2
Dependent Claim
12 words
The solution of claim 2 wherein the polar organic solvent is dimethylformamide.
Claim 3
Dependent Claim
30 words
The solution of claim 2 wherein the anion is chloride and said chloride is present in a molar ratio to antimony of from 0.5 to 1 to 1.9 to 1.
Claim 4
Dependent Claim
22 words
The solution of claim 4 wherein the molar ratio of chloride to antimony is from 0.8 to 1 to 1.2 to 1.
Claim 5
Dependent Claim
23 words
The solution of claim 5 having a molar ratio of antimony to tartaric acid of from 1 to 1 to 1.3 to 1.
Claim 6
Dependent Claim
12 words
The solution of claim 4 wherein said polar organic solvent is dimethylformamide.
Claim 7
Dependent Claim
12 words
The solution of claim 2 wherein the polar organic solvent is dimethylsulfoxide.
Claim 8
Dependent Claim
12 words
The solution of claim 4 wherein the polar organic solvent is dimethylsulfoxide.
Claim 9
Dependent Claim
30 words
The solution of claim 2 wherein the anion is ethoxide and said ethoxide is present in a molar ratio of antimony of from 1 to 1 to 2 to 1.
Claim 10
Dependent Claim
23 words
The solution of claim 10 wherein the molar ratio of antimony to tartaric acid is from 1 to 1 to 1.3 to 1.
Claim 11
Dependent Claim
20 words
The solution of claim 10 wherein said polar organic solvent is selected from the group consisting of dimethylformamide and dimethylsulfoxide.
Claim 12
Dependent Claim
114 words
A process for producing stable solutions of monomeric trivalent antimony-tartaric acid compounds stabilized by an anion selected from the group consisting of chloride and bromide in dimethylformamide comprising a. dissolving an antimony compound selected from the group consisting of antimony trichloride and antimony tribromide and 1.5 moles of water per mole of antimony compound in dimethylformamide to form an antimony solution, b. bubbling sufficient ammonia into the antimony solution while maintaining the temperature of the antimony solution between 15*C. and 50*C. to precipitate between 1.1 and 2.5 moles of ammonium salt forming a reaction mixture, c. filtering the ammonium salt from the reaction mixture, and d. dissolving tartaric acid in the filtered reaction mixture.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |