US4311571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid phase transformation for poly(butene-1)
Assignee: ConocoPhillips Co
•
Filing: 1980-10-10
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Granted: 1982-01-19
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Expires: 2000-10-10
Abstract
Abstract Poly(butene-1) in type II form can be accelerated to its stable type I form by applying a volatile solvent such as an olefinic hydrocarbon 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
2026-10-31 10:52
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; C08J2323/00; C08J2323/02; C08J2323/18; C08J2323/20; Y; Y10; Y10S; Y10S204/00; Y10S204/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A method for accelerating poly(butene-1) phase transformation from unstable tetragonal crystallites to stable hexagonal polymorph, the method comprising applying a material selected from the group consisting of olefinic hydrocarbons and alkyl halides to poly(butene-1) in type II (tetragonal) form, evaporating said material to cause an immediate phase change to type I (hexagonal) form in the area contacted, thereby accelerating phase transformation to a stable poly(butene-1) type I (hexagonal) form through the polybutene.
Claim 2
Independent Claim
72 words
A method for accelerating poly(butene-1) phase transformation from unstable tetragonal crystallites to stable hexagonal polymorph, the method comprising applying a material selected from the group consisting of olefinic hydrocarbons and alkyl halides to poly(butene-1) in type II (tetragonal) form, evaporating said material to cause an immediate phase change to type I (hexagonal) form in the area contacted, thereby accelerating phase transformation to a stable poly(butene-1) type I (hexagonal) form through the polybutene.
Claim 3
Dependent Claim
36 words
A method as described in claim 1 wherein the olefinic hydrocarbon is selected from the group consisting of ethylene propylene 1-butene 2-butene isobutylene butadiene 1-pentene 2-pentene isoprene 1-hexene 2-hexene 3-hexene 1-heptene 2-heptene 3-heptene 3-methyl-1-butene 2-methyl-2-butene 2,3-dimethyl-2-butene
Claim 4
Dependent Claim
69 words
A method as described in claim 2 wherein the alkyl halide is selected from the group consisting of methyl chloride methyl bromide methyl iodide ethyl chloride ethyl bromide ethyl iodide n-propyl chloride n-propyl bromide n-butyl chloride isopropyl chloride isopropyl bromide isopropyl iodide isobutyl chloride isobutyl bromide sec-butyl chloride sec-butyl bromide tert-butyl chloride tert-butyl bromide vinyl chloride vinyl bromide vinyl iodide allyl chloride allyl bromide crotyl chloride (1-chloro-2-butene) 3-chloro-1-butene dichloromethane
Claim 5
Dependent Claim
17 words
A method as described in claim 3 wherein phase transformation is further accelerated with ultrasonic sound waves.
Claim 6
Dependent Claim
21 words
A method as described in claim 4 wherein phase transformation is further accelerated with the application of heat below 90° C.
Claim 7
Dependent Claim
44 words
A method as described in claim 5 wherein an alkene 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.
Claim 8
Dependent Claim
20 words
A method as described in claim 1 wherein the polybutene in tetragonal form is obtained from a melt of polybutene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |