US3008937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic crosslinking of vinyltoluene polymers
Assignee: Dow Chemical Co
•
Filing: 1957-06-03
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Granted: 1961-11-14
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Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Norman R Ruffing
- 👤 James L Amos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF CATALYTICALLY CROSSLINKING A THERMOPLASTIC POLYMER OF THE GROUP CONSISTING OF HOMOPOLYMERS OF VINYLTOLUENE AND COPOLYMERS OF AT LEAST 50 WEIGHT PERCENT OF VINYLTOLUENE WITH ANOTHER MONOVINYL COMPOUND COPOLYMERIZABLE THEREWITH, WHICH METHOD CONSISTS IN HEATING SAID POLYMER IN INTIMATE CONTACT WITH BETWEEN 0.02 AND 5 WEIGHT PERCENT, POLYMER BASIS, OF A PEROXIDE CATALYST OF THE GROUP CONSISTING OF BENZOYL PEROXIDE, LAUROYL PEROXIDE, CUMENE HYDROPEROXIDE, DICUMYL PEROXIDE, DIISOPROPYLBENZENE DIHYDROPEROXIDE, DIACETYL PEROXIDE AND TETRALIN PEROXIDE AT A TEMPERATURE OF SAID PEROXIDE C. ABOVE THE DECOMPOSITION TEMPERATURE OF SAID PEROXIDE AND 225*C. AND RECOVERING A CROSSLINKED PRODUCT.
Claim 2
Independent Claim
96 words
A METHOD OF CATALYTICALLY CROSSLINKING A THERMOPLASTIC POLYMER OF THE GROUP CONSISTING OF HOMOPOLYMERS OF VINYLTOLUENE AND COPOLYMERS OF AT LEAST 50 WEIGHT PERCENT OF VINYLTOLUENE WITH ANOTHER MONOVINYL COMPOUND COPOLYMERIZABLE THEREWITH, WHICH METHOD CONSISTS IN HEATING SAID POLYMER IN INTIMATE CONTACT WITH BETWEEN 0.02 AND 5 WEIGHT PERCENT, POLYMER BASIS, OF A PEROXIDE CATALYST OF THE GROUP CONSISTING OF BENZOYL PEROXIDE, LAUROYL PEROXIDE, CUMENE HYDROPEROXIDE, DICUMYL PEROXIDE, DIISOPROPYLBENZENE DIHYDROPEROXIDE, DIACETYL PEROXIDE AND TETRALIN PEROXIDE AT A TEMPERATURE OF SAID PEROXIDE C. ABOVE THE DECOMPOSITION TEMPERATURE OF SAID PEROXIDE AND 225*C. AND RECOVERING A CROSSLINKED PRODUCT.
References Cited (Backward Citations)
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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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |