Patent US4051083A successfully refreshed from Google Patents.
US4051083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer blends for tire components
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-08-01
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Granted: 1977-09-27
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Expires: 1995-08-01
Abstract
Abstract Tire flexing components having improved ozone and flex and weather resistance are prepared by blending a general purpose rubber with a chlorinated EPDM containing about 0.1 to about 0.9 wt. % chlorine. The products so formed are useful for tire components that are subject to severe flexing such as coverstrips and sidewalls.
Inventors
- 👤 Neil F. Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:14
CPC Classifications
B; B60; B60C; B60C1/00; C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
A method for improving the weather resistance, flex and ozone resistance of tire flexing components prepared from blends of highly unsaturated rubbers, said blends comprising 25 to 75% by weight of natural rubber, the balance of said blends being styrene-butadiene rubber or polybutadiene rubber, which comprises incorporating into the tire flexing composition about 25 to about 40 parts per hundred based on the highly unsaturated rubber blend of a chlorinated EPDM containing 0.1 to 0.9 weight % chlorine.
Claim 2
Independent Claim
78 words
A method for improving the weather resistance, flex and ozone resistance of tire flexing components prepared from blends of highly unsaturated rubbers, said blends comprising 25 to 75% by weight of natural rubber, the balance of said blends being styrene-butadiene rubber or polybutadiene rubber, which comprises incorporating into the tire flexing composition about 25 to about 40 parts per hundred based on the highly unsaturated rubber blend of a chlorinated EPDM containing 0.1 to 0.9 weight % chlorine.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the chlorinated EPDM is incorporated into the composition at about 25 to about 35 phr.
Claim 4
Dependent Claim
21 words
The method of claim 3 wherein the chlorinated EPDM is incorporated into the composition at about 25 to about 30 phr.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the chlorinated EPDM contains about 0.3 to about 0.7 weight % chlorine.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the chlorinated EPDM contains about 0.55 to about 0.65 weight % chlorine.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the tire flexing component is an automobile tire sidewall.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the tire flexing component is an automobile tire coverstrip.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the blend comprises natural rubber and styrene-butadiene rubber.
Claim 10
Dependent Claim
18 words
The method of claim 8 wherein the chlorinated EPDM contains about 0.55 to about 0.65 weight % chlorine.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |