US3969333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of copolymers of 4-methylpentene-1
Assignee: BASF SE
•
Filing: 1975-02-06
•
Granted: 1976-07-13
•
Expires: 1995-02-06
Abstract
Abstract Copolymers of 4-methylpentene-1 are prepared by copolymerization of 4-methylpentene-1 with one or more other C 2-18 α-alkenes at a temperature above room temperature and in the presence of hydrogen using a Ziegler/Natta catalyst system. The polymerization is carried out at a relatively very high temperature and in the presence of an inert gas with the proviso that the partial pressures of the inert gas and of the hydrogen and the sum of the partial pressures of the inert gas, hydrogen and 4-methylpentene-1 have specific values. In this way, copolymers having large crystalline fractions are obtained in a high yield per unit of catalyst system per unit time.
Inventors
- 👤 Johann Nickl
- 👤 Hans Schick
- 👤 Heinz Mueller-Tamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:29
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/14; Y; Y10; Y10S; Y10S526/00; Y10S526/905
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
A process for the manufacture of copolymers of 4-methylpentene-1 containing up to 10 polymerized units, by weight, of one or more other C 2-18 α -alkene per 100 units, by weight, of 4-methylpentene-1 by copolymerization of a liquid excess of the mixture of 4-methylpentene-1 with one or more other C 2-18 α -alkenes at (1) a temperature above room temperature and (2) in the presence of hydrogen using (3) a Zeigler/Natta catalyst system consisting of (3.1) a titaium trichloride component and (3.2) an alkyl aluminum component, the atomic ratio of titanium in catalyst component (3.1) to aluminum in catalyst component (3.2) being from 1:1 to 1:100, wherein polymerization is carried out a. at a temperature of from 90° to 150°C, b. in the presence of an inert gas consisting of nitrogen, helium, neon, argon or krypton or a mixture thereof, and c. at a partial pressure (c 1 ) of inert gas of from 0.1 to 17 atmospheres absolute and a partial pressure (c 2 ) of hydrogen of 0.01 to 10 atmospheres absolute, with the proviso (c 3 ) that the sum of the partial pressures of inert gas, hydrogen and 4-methylpentene-1 is from 3 to 20 atmospheres absolute.
Claim 2
Dependent Claim
200 words
A process for the manufacture of copolymers of 4-methylpentene-1 containing up to 10 polymerized units, by weight, of one or more other C 2-18 α -alkene per 100 units, by weight, of 4-methylpentene-1 by copolymerization of a liquid excess of the mixture of 4-methylpentene-1 with one or more other C 2-18 α -alkenes at (1) a temperature above room temperature and (2) in the presence of hydrogen using (3) a Zeigler/Natta catalyst system consisting of (3.1) a titaium trichloride component and (3.2) an alkyl aluminum component, the atomic ratio of titanium in catalyst component (3.1) to aluminum in catalyst component (3.2) being from 1:1 to 1:100, wherein polymerization is carried out a. at a temperature of from 90° to 150°C, b. in the presence of an inert gas consisting of nitrogen, helium, neon, argon or krypton or a mixture thereof, and c. at a partial pressure (c 1 ) of inert gas of from 0.1 to 17 atmospheres absolute and a partial pressure (c 2 ) of hydrogen of 0.01 to 10 atmospheres absolute, with the proviso (c 3 ) that the sum of the partial pressures of inert gas, hydrogen and 4-methylpentene-1 is from 3 to 20 atmospheres absolute.
Claim 3
Dependent Claim
14 words
A process as set forth in claim 1 wherein said inert gas is nitrogen.
Claim 4
Dependent Claim
14 words
A process as set forth in claim 1 wherein said inert gas is argon.
Claim 5
Dependent Claim
17 words
A process as set forth in claim 2 wherein said reaction temperature is from 110° to 130°C.
Claim 6
Dependent Claim
22 words
A process as set forth in claim 2 wherein the sum of the partial pressure is from 8 to 10 atmospheres absolute.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |