US4224196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flex resistant sidewall compounds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1978-12-07
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Granted: 1980-09-23
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Expires: 1998-12-07
Abstract
Abstract Pneumatic tire sidewall compositions are disclosed comprising blends of a halobutyl rubber, a high unsaturation rubber and an oil extended terpolymer of ethylene, propylene, and a diene wherein the oil extended terpolymer contains from between 25 to 150 phr of a paraffinic or naphthenic oil. These triblends provide sidewalls of unexpectedly improved flex resistance, even as compared to similar triblend compositions in which similar amounts of oil are included, but in which an oil extended terpolymer is not employed. Furthermore, methods of preparing such compositions are also disclosed comprising preparing an oil extended terpolymer, and then blending that terpolymer with the halobutyl and high unsaturation rubbers.
Inventors
- 👤 Leonard Gursky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
C; C08; C08L; C08L21/00; B; B60; B60C; B60C1/00; B60C1/0025; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/06; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/28; C08L23/283; C08L7/00; C08L9/00; C08L91/00; C08L2205/00; C08L2205/03; C08L2205/035; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10S; Y10S152/00; Y10S152/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A pneumatic tire side wall composition comprising a blend of from 20 to 70 parts of halobutyl rubber, from 20 to 70 parts of a high unsaturation rubber, and from 10 to 60 parts of an oil extended terpolymer of ethylene, propylene and a diene, said oil extended terpolymer containing between about 25 and 150 phr, based on the weight of the terpolymer prior to oil extension, of an oil selected from the group consisting of naphthenic and paraffinic oils, wherein said terpolymer, prior to being oil extended, has a Mooney viscosity of greater than about 100 at 260° F.
Claim 2
Dependent Claim
100 words
A pneumatic tire side wall composition comprising a blend of from 20 to 70 parts of halobutyl rubber, from 20 to 70 parts of a high unsaturation rubber, and from 10 to 60 parts of an oil extended terpolymer of ethylene, propylene and a diene, said oil extended terpolymer containing between about 25 and 150 phr, based on the weight of the terpolymer prior to oil extension, of an oil selected from the group consisting of naphthenic and paraffinic oils, wherein said terpolymer, prior to being oil extended, has a Mooney viscosity of greater than about 100 at 260° F.
Claim 3
Dependent Claim
32 words
The pneumatic tire side wall composition of claim 1 wherein said terpolymer comprises from about 50 to 75% of said ethylene based on the weight of said terpolymer prior to oil extension.
Claim 4
Dependent Claim
32 words
The pneumatic tire side wall composition of claim 2 wherein said terpolymer comprises from about 3 to 12% of said diene based on the weight of said terpolymer prior to oil extension.
Claim 5
Dependent Claim
16 words
The pneumatic tire side wall composition of claim 1 wherein said halobutyl rubber comprises chlorobutyl rubber.
Claim 6
Dependent Claim
27 words
The pneumatic tire side wall composition of claim 1 wherein said oil extended terpolymer includes from about 70 to 110 phr of a naphthenic or paraffinic oil.
Claim 7
Dependent Claim
17 words
The pneumatic tire side wall composition of claim 1 wherein said high unsaturation rubber comprises natural rubber.
Claim 8
Dependent Claim
18 words
The pneumatic tire side wall composition of claim 1 wherein said high unsaturation rubber comprises styrene butadiene rubber.
Claim 9
Dependent Claim
17 words
The pneumatic tire side wall composition of claim 1 wherein said high unsaturation rubber comprises polybutadiene rubber.
Claim 10
Independent Claim
104 words
A method of preparing a pneumatic tire side wall composition which comprises by means well-known in the art preparing an oil extended terpolymer of ethylene, propylene and a diene including between about 25 and 150 phr of an oil selected from the group consisting of paraffinic and naphthenic oils, and blending from about 10 to 60 parts of said oil extended terpolymer with from about 20 to 70 parts of halobutyl rubber and from about 20 to 70 parts of a high unsaturation rubber, wherein said terpolymer, prior to being oil extended has a Mooney viscosity of greater than about 100° at 260° F.
Claim 11
Independent Claim
104 words
A method of preparing a pneumatic tire side wall composition which comprises by means well-known in the art preparing an oil extended terpolymer of ethylene, propylene and a diene including between about 25 and 150 phr of an oil selected from the group consisting of paraffinic and naphthenic oils, and blending from about 10 to 60 parts of said oil extended terpolymer with from about 20 to 70 parts of halobutyl rubber and from about 20 to 70 parts of a high unsaturation rubber, wherein said terpolymer, prior to being oil extended has a Mooney viscosity of greater than about 100° at 260° F.
Claim 12
Dependent Claim
28 words
The method of claim 9 wherein said terpolymer comprises from about 50 to 75% of said ethylene based on the weight of said terpolymer prior to oil extension.
Claim 13
Dependent Claim
12 words
The method of claim 9 wherein said halobutyl rubber comprises chlorobutyl rubber.
Claim 14
Dependent Claim
23 words
The method of claim 9 wherein said oil extended terpolymer includes from about 70 to 110 phr of a naphthenic or paraffinic oil.
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |