US4097464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,6-Di-tert-alkyl-4-vinylphenols as polymerizable antioxidants
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1975-11-03
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Granted: 1978-06-27
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Expires: 1995-11-03
Abstract
Abstract 2,6-Di tert alkyl-4-vinylphenols are copolymerized in free radical emulsion polymerization systems to form self-stabilizing polymers. Such polymers have the advantage that the antioxidant cannot be extracted or volatilized from the polymer.
Inventors
- 👤 Richard H. Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:19
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A process of preparing a self-stabilizing diene polymer comprising polymerizing in a free radical emulsion polymerization system a monomer system comprised of at least 40 parts by weight of diene monomer and 0.10 to 10 parts by weight of at least one phenolic monomer having the following structural formula ##STR3## wherein R and R 1 are tertiary alkyl radicals containing from 4 to 8 carbon atoms and R 2 is selected from the group consisting of hydrogen and methyl and wherein all parts are parts by weight per 100 parts of total monomer.
Claim 2
Dependent Claim
93 words
A process of preparing a self-stabilizing diene polymer comprising polymerizing in a free radical emulsion polymerization system a monomer system comprised of at least 40 parts by weight of diene monomer and 0.10 to 10 parts by weight of at least one phenolic monomer having the following structural formula ##STR3## wherein R and R 1 are tertiary alkyl radicals containing from 4 to 8 carbon atoms and R 2 is selected from the group consisting of hydrogen and methyl and wherein all parts are parts by weight per 100 parts of total monomer.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein the phenolic monomer is 2,6-di tert.butyl-4-vinylphenol.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein the monomer system is comprised of 1,3-butadiene, the phenolic monomer and another monomer selected from the group consisting of styrene and acrylonitrile.
Claim 5
Dependent Claim
12 words
The process according to claim 3 wherein the other monomer is styrene.
Claim 6
Dependent Claim
86 words
A self-stabilizing diene polymer of which the molecular structure includes at least 40 parts by weight of a conjugated diene monomer and 0.10 to 10 parts by weight of at least one phenolic segmeric unit having the following structural formula ##STR4## wherein R and R 1 are tertiary alkyl radicals containing from 4 to 8 carbon atoms and R 2 is selected from the group consisting of hydrogen and methyl and wherein all parts are parts by weight per 100 parts by weight of total polymer.
Claim 7
Dependent Claim
86 words
A self-stabilizing diene polymer of which the molecular structure includes at least 40 parts by weight of a conjugated diene monomer and 0.10 to 10 parts by weight of at least one phenolic segmeric unit having the following structural formula ##STR4## wherein R and R 1 are tertiary alkyl radicals containing from 4 to 8 carbon atoms and R 2 is selected from the group consisting of hydrogen and methyl and wherein all parts are parts by weight per 100 parts by weight of total polymer.
Claim 8
Dependent Claim
47 words
The polymer according to claim 5 which is comprised of at least 40 weight percent 1,3-butadiene, a monomer selected from the group consisting of styrene and acrylonitrile, and 0.10 to 10 parts by weight of at least one phenolic segmeric unit having the following structural formula ##STR5##
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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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |