US4187158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid phase transformation for polybutene-1
Assignee: ConocoPhillips Co
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Filing: 1978-04-06
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Granted: 1980-02-05
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Expires: 1998-04-06
Abstract
Abstract Polybutene-1 in type II form can be accelerated in a phase transformation to the stable polybutene-1 type I form by applying a volatile solvent such as n-hexane and allowing the solvent to evaporate. The phase transformation can be accelerated by additional treatment with heat below the melt temperature of about 90° C. and/or ultrasonic sound.
Inventors
- 👤 Mark P. Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:51
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08J2323/00; C08J2323/02; C08J2323/18; C08J2323/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A method for accelerating polybutene phase transformation from type II to type I, the method comprising applying a solvent selected from the group consisting of alkane isomers, cycloalkane isomers, and ethers to polybutene in type II form, said solvent evaporating and causing an immediate phase change to type I form in the area contacted thereby accelerating phase transformation to a stable polybutene type I form throughout the polybutene.
Claim 2
Independent Claim
68 words
A method for accelerating polybutene phase transformation from type II to type I, the method comprising applying a solvent selected from the group consisting of alkane isomers, cycloalkane isomers, and ethers to polybutene in type II form, said solvent evaporating and causing an immediate phase change to type I form in the area contacted thereby accelerating phase transformation to a stable polybutene type I form throughout the polybutene.
Claim 3
Dependent Claim
64 words
A method as described in claim 1 wherein the solvent is selected from the group consisting of diethyl ether, n-heptane, pentane, hexane, isoheptane, isohexane, 2,2-dimethylbutane, 2,3-dimethylbutane, 2,5-dimethylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane, 3-ethylpentane, hexamethylethane, n-hexane, 2-methylbutane, 2-methylhexane, 3-methylhexane, 4-methylpentane, 3-methylpentane, n-pentane, cycloheptane, cyclohexane, cyclopentane, 1,1-dimethylcyclohexane, 1,2-dimethylcyclohexane, 1,3-cis dimethylcyclohexane, 1,3-trans dimethylcyclohexane, 1,4-dimethylcyclohexane, methylcyclohexane, methylcyclopentane, isopropyl ether, n-propyl ether, tert-butyl ether, tert-butyl methylether, or mixtures of these.
Claim 4
Dependent Claim
17 words
A method as described in claim 2 wherein phase transformation is further accelerated with ultrasonic sound waves.
Claim 5
Dependent Claim
21 words
A method as described in claim 2 wherein phase transformation is further accelerated with the application of heat below 90° C.
Claim 6
Dependent Claim
45 words
A method as described in claim 2 wherein a volatile solvent is applied to copolymers of butene and isobutylene, copolymers of butene and propylene, copolymers of butene and ethylene, blends of polybutene with polyisobutylene, blends of polybutylene with polypropylene, and blends of polybutylene with polyethylene.
References Cited (Backward Citations)
US3499884A
Cited
US3558551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |