US4011384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of crystalline terpolymers of ethene, butene-1 and butene-2
Assignee: VESTOLEN GmbH
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Filing: 1975-06-10
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Granted: 1977-03-08
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Expires: 1995-06-10
Abstract
Abstract For preparing crystalline, thermoplastic, low-pressure terpolymers of ethene with 0.1-5 mol % butene-1 and 0.1-3 mol % butene-2 having a density of 0.94-0.96 g./cm 3 , a liquid phase monomer mixture consisting essentially of ethene, 0.05-10 mol % butene-1 and 20-98.9 mol % butene-2 is polymerized with a mixed polymerization catalyst comprising (a) TiCl 3 . nAlCl 3 wherein n is 0.2-0.6, and (b) isoprenylaluminum in a molar ratio Al : Ti of about 2-20 to form said terpolymer.
Inventors
- 👤 Fritz Baxmann
- 👤 Johann Dietrich
- 👤 Walter Dittmann
- 👤 Albert Frese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:20
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A process for preparing crystalline, thermoplastic, low-pressure terpolymers of ethene with 0.1-5 mol % butene-1 and 0.1-3 mol % butene-2 having a density of 0.94-0.96 g./cm 3 , which comprises: polymerizing a liquid phase monomer mixture consisting essentially of ethene, 0.05-10 mol % butene-1 and 20-98.9 mol % butene-2 with a catalytic amount of a particulate mixed polymerization catalyst comprising a. TiCl 3 .sup.. nAlCl 3 wherein n is 0.2-0.6, and b. isoprenylaluminum in a molar ratio Al : Ti of about 2-20 to form said terpolymer.
Claim 2
Dependent Claim
87 words
A process for preparing crystalline, thermoplastic, low-pressure terpolymers of ethene with 0.1-5 mol % butene-1 and 0.1-3 mol % butene-2 having a density of 0.94-0.96 g./cm 3 , which comprises: polymerizing a liquid phase monomer mixture consisting essentially of ethene, 0.05-10 mol % butene-1 and 20-98.9 mol % butene-2 with a catalytic amount of a particulate mixed polymerization catalyst comprising a. TiCl 3 .sup.. nAlCl 3 wherein n is 0.2-0.6, and b. isoprenylaluminum in a molar ratio Al : Ti of about 2-20 to form said terpolymer.
Claim 3
Dependent Claim
26 words
A process according to claim 1 wherein the ratio of butene-1 to butene-2 in the polymerization mixture is about 1 : 1,000 to 1 : 100.
Claim 4
Dependent Claim
28 words
A process according to claim 1 wherein said liquid phase comprises a C 4 hydrocarbon mixture consisting essentially of 20-60% butane, 25-50% trans-butene-2, 10-30% cis-butene-2 and 0.1-10% butene-1.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the Al : Ti ratio is 5-15.
Claim 6
Dependent Claim
18 words
A process according to claim 1 wherein the resultant terpolymer has a molecular weight distribution nonuniformity of 5-40.
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |