US4012344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire tread compositions having improved low temperature properties
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-10-06
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Granted: 1977-03-15
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Expires: 1995-10-06
Abstract
Abstract Tires having both improved wet skid resistance and low temperature performance properties are prepared by blending into conventional tire tread compositions a copolymer of isobutylene and cyclopentadiene (CPD) having a CPD content of between 5 and less than 20 mol %. The tire tread composition preferably contains about 30 wt. % of cyclopentadiene copolymer. Low temperature properties are improved compared to compositions containing greater than 20 mol % CPD in the copolymer.
Inventors
- 👤 Harvey L. Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
C; C08; C08L; C08L7/00; B; B60; B60C; B60C1/00; B60C1/0016; C08L9/00; C08L9/06; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A tire tread composition exhibiting improved wet skid resistance and low temperature properties, the rubber polymer component comprising a blend of at least one general purpose rubber selected from the group consisting of natural rubber, polyiosprene, styrene butadiene, and polybutadiene and at least 20 wt. % of an elastomeric copolymer of isobutylene and cyclopentadiene, based on the weight of the copolymer plus said general purpose rubber, wherein said copolymer contains from at least 5% to less than 20 mol % of cyclopentadiene.
Claim 2
Dependent Claim
82 words
A tire tread composition exhibiting improved wet skid resistance and low temperature properties, the rubber polymer component comprising a blend of at least one general purpose rubber selected from the group consisting of natural rubber, polyiosprene, styrene butadiene, and polybutadiene and at least 20 wt. % of an elastomeric copolymer of isobutylene and cyclopentadiene, based on the weight of the copolymer plus said general purpose rubber, wherein said copolymer contains from at least 5% to less than 20 mol % of cyclopentadiene.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the general purpose rubber comprises a blend of styrene-butadiene rubber and polybutadiene rubber.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein the composition comprises a blend of about 50 parts of SBR and 20 parts by weight of polybutadiene rubber as the general purpose rubber.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein the copolymer is incorporated into the blend at about 20 to about 40 wt. %.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein the cyclopentadiene content of the copolymer is from 10 to 19 mol %.
Claim 7
Dependent Claim
30 words
The composition of claim 1 wherein the copolymer comprises about 30 wt. % of said blend and the cyclopentadiene content of the copolymer is from 12 to 18 mol %.
References Cited (Backward Citations)
US3250733A
Cited
US3483176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |