US4048419A
Expired / Lapsed
US
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Process for the production of partially crystalline polybutene-1
Assignee: VESTOLEN GmbH
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Filing: 1975-05-27
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Granted: 1977-09-13
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Expires: 1995-05-27
Abstract
Abstract Butene-1 optionally in the presence of up to 10% by weight of propene or like comonomer, is polymerized in excess butene-1 or liquid C 4 fraction at 60°-120° C. to form a polybutene suitable for forming transparent films by employing as the polymerization catalyst (a) TiCl 3 . nAlCl 3 (n = 0.2 to 0.6) and (b) a mixture of 85 - 99.9 molar percent of dialkyl aluminum monochloride and 0.1 - 15 molar percent of trialkyl aluminum.
Inventors
- 👤 Albert Frese
- 👤 Walter Dittmann
- 👤 Wolfgang Kilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:58
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/08; Y; Y10; Y10S; Y10S526/00; Y10S526/902
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
A process for the production of partially crystalline polybutene-1 formable into transparent sheets and films which comprises: i. solution polymerization at 60°-120° C. of 35-98% of butene-1, based on the starting mixture, in excess butene-1 or an inert, low-boiling liquid C 4 solvent consisting of butene-1 and one or both of butene-2 and butane, employing as the polymerization catalyst a mixed catalyst consisting essentially of (a) a thermally unstable TiCl 3 . n AlCl 3 (n = 0.2 to 0.6) and (b) a mixture of 85-99.9 molar percent of a dialkyl aluminum monochloride and 0.1-15 molar percent of a trialkyl aluminum in a molar ratio of component (b) to component (a) of from 1 to 4:1; and thereafter ii. volatilizing the polymerization solvent and recovering the residue containing both the ether soluble and etherinsoluble fractions as the polymerizate.
Claim 2
Dependent Claim
138 words
A process for the production of partially crystalline polybutene-1 formable into transparent sheets and films which comprises: i. solution polymerization at 60°-120° C. of 35-98% of butene-1, based on the starting mixture, in excess butene-1 or an inert, low-boiling liquid C 4 solvent consisting of butene-1 and one or both of butene-2 and butane, employing as the polymerization catalyst a mixed catalyst consisting essentially of (a) a thermally unstable TiCl 3 . n AlCl 3 (n = 0.2 to 0.6) and (b) a mixture of 85-99.9 molar percent of a dialkyl aluminum monochloride and 0.1-15 molar percent of a trialkyl aluminum in a molar ratio of component (b) to component (a) of from 1 to 4:1; and thereafter ii. volatilizing the polymerization solvent and recovering the residue containing both the ether soluble and etherinsoluble fractions as the polymerizate.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein the polymerization is conducted in the presence of a comonomer.
Claim 4
Dependent Claim
11 words
A process according to claim 2 wherein the comonomer is propene.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the polymerization is conducted at 70°-100° C.
Claim 6
Dependent Claim
28 words
A process according to claim 1 wherein the (a) component of the mixed catalyst is produced by the reduction of titanium tetrachloride with aluminum or ethyl aluminum sesquichloride.
Claim 7
Dependent Claim
24 words
A process according to claim 5 wherein the TiCl 3 . nAlCl 3 component is TiCl 3 . 0.3 to 0.5 AlCl 3 .
Claim 8
Dependent Claim
31 words
A process according to claim 1 wherein the (b) component of the mixed catalyst is 90-99 molar percent of a dialkyl aluminum monochloride and 1-10 molar percent of a trialkyl aluminum.
Claim 9
Dependent Claim
15 words
A process according to claim 7 wherein the dialkyl aluminum monochloride is diethyl aluminum monochloride.
Claim 10
Dependent Claim
13 words
A process according to claim 7 wherein the trialkyl aluminum compound is triethylaluminum.
Claim 11
Dependent Claim
25 words
A process according to claim 1 wherein the mixed catalyst has a molar ratio of Al : Ti of from 1 to 3 : 1.
Claim 12
Dependent Claim
17 words
A process according to claim 10 wherein the molar ratio is from 1.5 to 2.5 : 1.
Claim 13
Dependent Claim
50 words
A process according to claim 4 wherein the (a) component of the mixed catalyst is TiCl 3 . 0.3-0.5 AlCl 3 produced by the reduction of titanium tetrachloride with aluminum or ethyl aluminum sesquichloride and the (b) component is 90-99 molar percent of diethylaluminum and 1-10 molar percent of triethylaluminum.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |