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US3919130A
Expired / Lapsed
US
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Tire tread compositions of improved wet skid resistance
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1974-06-03
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Granted: 1975-11-11
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Expires: 1994-06-03
Abstract
Abstract Tires having an improved wet skid resistance are prepared by blending into conventional tire tread compositions a copolymer of isobutylene and cyclopentadiene having a cyclopentadiene content of at least 20 mole %. The tire tread composition preferably contains about 30 weight percent of cyclopentadiene copolymer.
Inventors
- 👤 Harvey L Cohen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:34
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; C08L23/26; C08L23/28; C08L23/283; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A TIRE TREAD COMPOSITION EXHIBITING IMPROVED WET SKID RESISTANCE WHICH COMPRISES A BLEND OF AT LEAST ONE GENERAL PURPOSE RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC POLYISOPRENE, STYRENE BUTADIENE RUBBER, POLYBUTADIENE RUBBER, AND MIXTURES THEREOF, AND AT LEAST 20 WEIGHT PERCENT OF AN ELASTOMERIC COPOLYMER, BASED ON THE COPOLYMER PLUS GENERAL PURPOSE RUBBER, OF ISOBUTYLENE AND CYCLOPENTADIENE WHEREIN SAID COPOLYMER COMPRISES ABOUT 20 TO ABOUT 40 MOLE PERCENT CYCLOPENTADIENE.
Claim 2
Dependent Claim
72 words
A TIRE TREAD COMPOSITION EXHIBITING IMPROVED WET SKID RESISTANCE WHICH COMPRISES A BLEND OF AT LEAST ONE GENERAL PURPOSE RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC POLYISOPRENE, STYRENE BUTADIENE RUBBER, POLYBUTADIENE RUBBER, AND MIXTURES THEREOF, AND AT LEAST 20 WEIGHT PERCENT OF AN ELASTOMERIC COPOLYMER, BASED ON THE COPOLYMER PLUS GENERAL PURPOSE RUBBER, OF ISOBUTYLENE AND CYCLOPENTADIENE WHEREIN SAID COPOLYMER COMPRISES ABOUT 20 TO ABOUT 40 MOLE PERCENT CYCLOPENTADIENE.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein the general purpose rubber comprises a blend of styrene butadiene rubber (SBR) and polybutadiene rubber.
Claim 4
Dependent Claim
23 words
The composition of claim 2 wherein the composition comprises about fifty (50) parts of SBR to about twenty (20) parts of polybutadiene 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 weight percent.
Claim 6
Dependent Claim
20 words
The composition of claim 1 wherein the cyclopentadiene content of the copolymer is about 23 to about 35 mole %.
Claim 7
Dependent Claim
20 words
The composition of claim 5 wherein the cyclopentadiene content of the copolymer is about 25 to about 33 mole %.
Claim 8
Dependent Claim
19 words
The composition of claim 4 wherein the copolymer comprises about 25 to about 35 weight % of the blend.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |