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US4384089A
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US
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Low temperature polymerization process
Assignee: Pony Industries Inc
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Filing: 1981-10-15
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Granted: 1983-05-17
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Expires: 2001-10-15
Abstract
Abstract The hydrocarbon fluid friction reducing properties of copolymers of two or more alpha-monoolefins having 4 to 20 carbon atoms is improved by copolymerizing the monomers in the liquid state by means of a Ziegler catalyst at a temperature of about 0° C. or lower.
Inventors
- 👤 David C. Dehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:45
CPC Classifications
C; C08; C08F; C08F210/00; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/86; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S526/00; Y10S526/916; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
In a process of preparing an alpha-monoolefin copolymer having superior hydrocarbon fluid friction-reducing properties by copolymerizing two or more alpha-monoolefins having 3 to 20 carbon atoms in the liquid state by means of a catalyst system comprising a first component which is a metal or metal compound of Groups IV-B, V-B or VIII of the Periodic Chart and an organo metal of a rare earth or metal from Groups I-A, II-A, or III-A of the Periodic Chart, the improvement comprising maintaining the temperature of the polymerization reaction mixture at a temperature of about 0° C. or lower until at least 15% by weight of the monomeric material present in the reaction mixture has been converted to polymer.
Claim 2
Dependent Claim
117 words
In a process of preparing an alpha-monoolefin copolymer having superior hydrocarbon fluid friction-reducing properties by copolymerizing two or more alpha-monoolefins having 3 to 20 carbon atoms in the liquid state by means of a catalyst system comprising a first component which is a metal or metal compound of Groups IV-B, V-B or VIII of the Periodic Chart and an organo metal of a rare earth or metal from Groups I-A, II-A, or III-A of the Periodic Chart, the improvement comprising maintaining the temperature of the polymerization reaction mixture at a temperature of about 0° C. or lower until at least 15% by weight of the monomeric material present in the reaction mixture has been converted to polymer.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein at least part of the polymerization is carried out in the presence of an inert liquid which is a solvent for the polymeric product.
Claim 4
Dependent Claim
53 words
The improved method of claim 2 wherein the monomers being copolymerized are selected from alpha monoolefins having 4 to 16 carbon atoms and each monomer component is present in the reaction mixture at a concentration of at least 10 mole percent, based on the total moles of monomeric material in the reaction mixture.
Claim 5
Dependent Claim
37 words
The improved process of claim 3 wherein the polymerization temperature is maintained at about -5° C. or lower until at least 15% by weight of the monomeric material present in the reaction mixture is converted to polymer.
Claim 6
Dependent Claim
33 words
The improved method of claim 4 wherein the polymerization temperature is maintained at about -10° C. or lower until about 15 to 50% by weight of the monomeric material is converted to polymer.
Claim 7
Dependent Claim
15 words
The improved process of claim 5 wherein the alpha-monoolefins being copolymerized are butene-1 and dodecene-1.
Claim 8
Dependent Claim
38 words
The improved process of any one of claims 2 to 6 wherein the inert liquid is a hydrocarbon solvent selected from the group consisting of naphtha, kerosene, alkanes having 6 to 10 carbon atoms and mixtures of these.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |