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US4155955A
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Chemically bound antioxidants
Assignee: Goodyear Tire and Rubber Co
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Filing: 1977-09-09
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Granted: 1979-05-22
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Expires: 1997-09-09
Abstract
Abstract Polymers are reacted with antioxidants such as N-(4-anilinophenyl) methacrylamide in the presence of a free radical initiator system of the azo, azonitrile or Redox type.
Inventors
- 👤 Carl R. Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:56
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/02; C08C; C08C19/00; C08C19/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
A process for chemically bonding antioxidants containing free radical polymerizable aliphatic unsaturation to a rubber selected from the group consisting of natural rubber, styrene/butadiene rubber and acrylonitrile/butadiene rubber which comprises reacting the antioxidant with the rubber in the presence of a free radical initiator selected from the group consisting of azo systems, azonitrile systems and Redox systems.
Claim 2
Dependent Claim
57 words
A process for chemically bonding antioxidants containing free radical polymerizable aliphatic unsaturation to a rubber selected from the group consisting of natural rubber, styrene/butadiene rubber and acrylonitrile/butadiene rubber which comprises reacting the antioxidant with the rubber in the presence of a free radical initiator selected from the group consisting of azo systems, azonitrile systems and Redox systems.
Claim 3
Dependent Claim
18 words
The process according to claim 3 wherein the polymeric material is a rubbery copolymer of butadiene and acrylonitrile.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |