Patent US4151343A successfully refreshed from Google Patents.
US4151343A
Expired / Lapsed
US
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High unsaturation butyl rubbers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-04-18
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Granted: 1979-04-24
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Expires: 1997-04-18
Abstract
Abstract Substantially gel-free, high unsaturation copolymers of isoolefin and diolefin and high unsaturation terpolymers of isoolefin, acyclic diene and cyclic diene having a number average molecular weight of at least about 90,000 and a mole percent of unsaturation of at least 5% and the process for preparing said polymers which comprises carrying out the polymerization in a homogeneous phase, introducing to the system either an aluminum halide in a soluble form or a hydrocarbylaluminum dihalide and carrying the reaction out at a temperature of less than about -100° C.
Inventors
- 👤 Warren A. Thaler
- 👤 Donald J. Buckley
- 👤 Joseph P. Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:17
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F210/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A substantially gel free copolymer consisting of a major portion of one isoolefin having about 4 to 10 carbon atoms and about 5 to about 45 mole % of conjugated diene having about 5 to about 9 carbon atoms, said copolymer having an Mn from 90,000 to below 120,000, said one isoolefin being selected from the group consisting of isobutylene, 2-methyl-1-butene, 3-methyl-1-butene or 4-methyl-1-pentene, and said one diene being selected from the group comprising isoprene, piperylene or methyl cyclopentadiene.
Claim 2
Dependent Claim
79 words
A substantially gel free copolymer consisting of a major portion of one isoolefin having about 4 to 10 carbon atoms and about 5 to about 45 mole % of conjugated diene having about 5 to about 9 carbon atoms, said copolymer having an Mn from 90,000 to below 120,000, said one isoolefin being selected from the group consisting of isobutylene, 2-methyl-1-butene, 3-methyl-1-butene or 4-methyl-1-pentene, and said one diene being selected from the group comprising isoprene, piperylene or methyl cyclopentadiene.
Claim 3
Dependent Claim
28 words
The product of claim 1, wherein the isoolefin is isobutylene and the diene is isoprene or piperylene, the diene content being about 8 to about 40 mole %.
Claim 4
Dependent Claim
26 words
The product of claim 1, wherein the isoolefin is isobutylene and the diene is methylcyclopentadiene, the diene content being about 8 to about 40 mole %.
Claim 5
Dependent Claim
17 words
The product of claim 1, wherein the diene content is about 8 to about 40 mole %.
Claim 6
Dependent Claim
119 words
A substantially gel free terpolymer consisting of a major portion of an isoolefin having about 4 to about 10 carbon atoms and a minor portion of an acyclic conjugated diene having about 5 to about 9 carbon atoms and a cyclic conjugated diene having about 5 to about 9 carbon atoms, a mole % unsaturation of said terpolymer being at least about 8 mole % and an Mn of said terpolymer being from 90,000 to below 120,000, said isoolefin being selected from the group consisting of isobutylene, 2-methyl-1-butene, 3-methyl-1-butene or 4-methyl-1-pentene, said acyclic diene being selected from the group consisting of isoprene or piperylene, and said cyclic conjugated diene being selected from the group consisting of cyclopentadiene and methylcyclopentadiene.
Claim 7
Dependent Claim
119 words
A substantially gel free terpolymer consisting of a major portion of an isoolefin having about 4 to about 10 carbon atoms and a minor portion of an acyclic conjugated diene having about 5 to about 9 carbon atoms and a cyclic conjugated diene having about 5 to about 9 carbon atoms, a mole % unsaturation of said terpolymer being at least about 8 mole % and an Mn of said terpolymer being from 90,000 to below 120,000, said isoolefin being selected from the group consisting of isobutylene, 2-methyl-1-butene, 3-methyl-1-butene or 4-methyl-1-pentene, said acyclic diene being selected from the group consisting of isoprene or piperylene, and said cyclic conjugated diene being selected from the group consisting of cyclopentadiene and methylcyclopentadiene.
Claim 8
Dependent Claim
21 words
The product of claim 5, wherein said isoolefin is isobutylene, said acyclic diene is isoprene, and said conjugated diene is cyclopentadiene.
Claim 9
Dependent Claim
12 words
The product of claim 5, wherein said cyclic conjugated diene is cyclopentadiene.
Claim 10
Dependent Claim
12 words
The product of claim 5, wherein said cyclic conjugated diene is methylcyclopentadiene.
Claim 11
Dependent Claim
16 words
The product of claim 7, wherein said terpolymer contains at least about 8 mole % unsaturation.
Claim 12
Dependent Claim
20 words
The product of claim 5, wherein said terpolymer contains at least about 8 mole % of said cyclic conjugated diene.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |