US3717619A
Expired / Lapsed
US
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Tetrathiooxalate polymers and their preparation
Assignee: EIDP Inc
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Filing: 1971-04-22
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Granted: 1973-02-20
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Expires: 1991-04-22
Abstract
Abstract Disclosed herein are tetrathiooxalate polymers having repeating units of the structure A PROCESS FOR MAKING SAID POLYMERS COMPRISING PREPARING AN ALKALI METAL TETRATHIOOXALATE PRECURSOR AND TREATING THE PRECURSOR WITH AN OXIDIZING AGENT TO POLYMERIZE THE POLYMERS; AND THE USE OF SAID POLYMERS IN THE VULCANIZATION OF RUBBER.
Inventors
- 👤 H Hartzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:01
CPC Classifications
C; C08; C08G; C08G75/00; C08L; C08L11/00; C08L21/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A tetrathiooxalate polymer composition comprising sulfur and carbon in a ratio of from about 1.2:1 to 2:1, sulfur:carbon, the polymer characterized in that substantial amounts of the carbon is present in dithiooxalyl segments, wherein presence of the dithiooxalyl segments is confirmed by cleavage of the polymer composition with ammonia to form dithiooxamide, the polymer further characterized by repeatiNg units of the structure
Claim 2
Dependent Claim
62 words
A tetrathiooxalate polymer composition comprising sulfur and carbon in a ratio of from about 1.2:1 to 2:1, sulfur:carbon, the polymer characterized in that substantial amounts of the carbon is present in dithiooxalyl segments, wherein presence of the dithiooxalyl segments is confirmed by cleavage of the polymer composition with ammonia to form dithiooxamide, the polymer further characterized by repeatiNg units of the structure
Claim 3
Dependent Claim
19 words
A composition according to claim 1, wherein the ratio of sulfur to carbon is from about 1.5:1 to 2:1.
Claim 4
Dependent Claim
36 words
A process for making the polymer of claim 1, comprising reacting carbon disulfide with an aromatic hydrocarbon-alkali metal addition complex reductant, forming an alkali metal tetrathiooxalate precursor thereby, and treating the precursor with an oxidizing agent.
Claim 5
Dependent Claim
12 words
A process according to claim 3, wherein the alkali metal is sodium.
Claim 6
Dependent Claim
12 words
A process according to claim 3, wherein the aromatic hydrocarbon is naphthalene.
Claim 7
Dependent Claim
12 words
A process according to claim 3, wherein the oxidizing agent is bromine.
References Cited (Backward Citations)
US3234187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |