US4195013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer composition for pneumatic tire treads
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1978-03-29
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Granted: 1980-03-25
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Expires: 1998-03-29
Abstract
Abstract Tire treads having both suitable skid resistance and hysteresis properties can be made from ethylene-α-olefin-nonconjugated diene elastomeric polymers by modifying the polymers with a sterically hindering unhalogenated mono-olefin monomer or with a mixture of sterically hindering unhalogenated mono-olefin monomers, such as norbornene and its unhalogenated derivatives.
Inventors
- 👤 Yves de Zarauz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:54
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F210/18; B; B60; B60C; B60C1/00; B60C1/0016; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A pneumatic tire having a tread with an improved compromise between skid resistance and hysteresis properties, said tread comprising a sulfurvulcanized elastomeric terapolymer containing a filler such as carbon black or silica and an extension oil, said elastomeric tetrapolymer containing from about 18% to about 75% by weight of ethylene, from about 20% to about 45% by weight of an acyclic α-olefin having the formula R-CH═CH 2 wherein R represents an alkyl radical having from 1 to 8 carbon atoms, from about 2% to about 7% by weight of a nonconjugated diene and from about 5% to about 15% by weight of at least one cyclic sterically hindering unhalogenated mono-olefin monomer which is a norbornene compound having the formula ##STR2## in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 may be hydrogen or an aliphatic, cycloaliphatic or aromatic unhalogenated hydrocarbon radical.
Claim 2
Dependent Claim
157 words
A pneumatic tire having a tread with an improved compromise between skid resistance and hysteresis properties, said tread comprising a sulfurvulcanized elastomeric terapolymer containing a filler such as carbon black or silica and an extension oil, said elastomeric tetrapolymer containing from about 18% to about 75% by weight of ethylene, from about 20% to about 45% by weight of an acyclic α-olefin having the formula R-CH═CH 2 wherein R represents an alkyl radical having from 1 to 8 carbon atoms, from about 2% to about 7% by weight of a nonconjugated diene and from about 5% to about 15% by weight of at least one cyclic sterically hindering unhalogenated mono-olefin monomer which is a norbornene compound having the formula ##STR2## in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 may be hydrogen or an aliphatic, cycloaliphatic or aromatic unhalogenated hydrocarbon radical.
Claim 3
Dependent Claim
13 words
The pneumatic tire according to claim 1 wherein the acyclic α-olefin is 1-propene.
Claim 4
Dependent Claim
157 words
A tread for use on a tire carcass, said tread having improved skid resistance and hysteresis properties and comprising a sulfur-vulcanized elastomeric tetrapolymer containing a filler such as carbon black or silica and an extension oil, said elastomeric tetrapolymer containing from about 18% to about 75% by weight of ethylene, from about 20% to about 45% by weight of an acyclic α-olefin having the formula R-CH═CH 2 wherein R represents an alkyl radical having from 1 to 8 carbon atoms, from about 2% to about 7% by weight of a nonconjugated diene and from about 5% to about 15% by weight of at least one cyclic sterically hindering unhalogenated mono-olefin monomer which is a norbornene compound having the formula ##STR3## in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 may be hydrogen or an aliphatic, cycloaliphatic or aromatic unhalogenated hydrocarbon radical.
Claim 5
Dependent Claim
157 words
A tread for use on a tire carcass, said tread having improved skid resistance and hysteresis properties and comprising a sulfur-vulcanized elastomeric tetrapolymer containing a filler such as carbon black or silica and an extension oil, said elastomeric tetrapolymer containing from about 18% to about 75% by weight of ethylene, from about 20% to about 45% by weight of an acyclic α-olefin having the formula R-CH═CH 2 wherein R represents an alkyl radical having from 1 to 8 carbon atoms, from about 2% to about 7% by weight of a nonconjugated diene and from about 5% to about 15% by weight of at least one cyclic sterically hindering unhalogenated mono-olefin monomer which is a norbornene compound having the formula ##STR3## in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 may be hydrogen or an aliphatic, cycloaliphatic or aromatic unhalogenated hydrocarbon radical.
Claim 6
Dependent Claim
12 words
The tread according to claim 3 wherein the acyclic α-olefin is 1-propene.
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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) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |