US3872062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imide additives for sulfur vulcanizable polymers
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1974-03-07
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Granted: 1975-03-18
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Expires: 1994-03-07
Abstract
Abstract Imides such as N-(morpholinothio)phthalimide are used to affect the vulcanization characteristics of sulfur vulcanizable polymers by increasing the state of vulcanization and/or improving scorch resistance and/or increasing the rate of vulcanization.
Inventors
- 👤 John P Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
A SULFUR VULCANIZABLE DIENE POLYMER HAVING INCORPORATED THEREIN AT LEAST ONE IMIDE HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Dependent Claim
17 words
A SULFUR VULCANIZABLE DIENE POLYMER HAVING INCORPORATED THEREIN AT LEAST ONE IMIDE HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 3
Dependent Claim
19 words
The sulfur vulcanizable diene polymer according to claim 1 wherein the polymer has incorporated therein an organic accelerating agent.
Claim 4
Dependent Claim
19 words
The sulfur vulcanizable diene polymer according to claim 1 wherein the polymer has incorporated therein a sulfur vulcanizing agent.
Claim 5
Dependent Claim
26 words
The sulfur vulcanizable diene polymer according to claim 2 wherein the organic accelerating agent is a primary accelerator and the polymer has incorporated therein elemental sulfur.
Claim 6
Dependent Claim
33 words
The sulfur vulcanizable diene polymer according to claim 1 wherein the imide is present in the amount of from 0.25 part to 5.0 parts by weight per 100 parts by weight of polymer.
Claim 7
Dependent Claim
51 words
The sulfur vulcanizable diene polymer according to claim 1 wherein R is Selected from the group consisting of 4,5-cyclohexenylene, orthophenylene, ethylene and 1,3-propylene, and A is selected from the group consisting of divalent radicals derived from piperazine, 2,5-dimethylpiperazine, imidazolidine, hexahydropyrimidine, homopiperazine, N,N''-dimethyl-ethylenediamine, N,N''-dimethyl-1,3-propylenediamine, N,N''-dimethyl-1,6-hexamethylenediamine, N,N''-dimethyl-1,4-cyclohexylenediamine, N,N''-dimethyl-p-phenylenediamine, 4,4''-ethylenedi(piperidine), 4,4''-trimethylenedi(piperidine), 4,4''-tetramethylenedi(piperidine) and 4,4''-hexamethylenedi(piperidine).
Claim 8
Dependent Claim
23 words
The sulfur vulcanizable diene polymer according to claim 1 wherein the imide is selected from the group consisting of 1,4-bis(phthalimidothio)-piperazine; 1,4-bis(phthalimidothio)-2,5-dimethylpiperazine and 4,4''-tetramethylenedi(piperidinothio)-bis(phthalimide).
Claim 9
Dependent Claim
31 words
The sulfur vulcanizable diene polymer according to claim 1 wherein the polymer is selected from the group consisting of natural rubber, cis-1,4 polybutadiene, cis-1,4 polyisoprene and copolymers of butadiene and styrene.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |