US4208497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of homopolymers and copolymers of α-monoolefins
Assignee: BASF SE
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Filing: 1978-03-03
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Granted: 1980-06-17
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Expires: 1998-03-03
Abstract
Abstract A process for the manufacture of homopolymers and copolymers of α-monoolefins by polymerizing the monomer or monomers at relatively low temperatures under relatively low pressures by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminum-alkyl component, wherein the titanium trichloride component (I) employed is obtained by exposing a conventional catalyst component consisting, or substantially consisting, of titanium trichloride, to a carbon monoxide atmosphere under specific conditions. Catalysts obtained from titanium trichloride components (I) which have been treated in this way exhibit a relatively long induction period.
Inventors
- 👤 Klaus Bronstert
- 👤 Peter Klaerner
- 👤 Gerhard Staiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:52
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
A process for the manufacture of homopolymer or copolymer of an α-monoolefin of 2 to 6 carbon atoms by polymerizing the monomer or monomers at from 30° to 200° C. under a pressure of from 0.1 to 200 bars by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminium-alkyl component of the general formula AlR 3 or ClAlR 2 , where R is alkyl of 1 to 8 carbon atoms, in an atomic ration of titanium, from catalyst component (I), to aluminum, from catalyst component (II), of from 1:1 to 1:100, wherein the titanium trichloride component (I) employed is obtained by exposing a catalyst component consisting, or substantially consisting, of a titanium trichloride co-crystallizate with aluminum chloride of the formula TiCl 3 .1/3AlCl 3 , to a carbon monoxide atmosphere under a pressure of from 0.1 to 10 bars at from -20° to 100° C. for a period of from 0.5 to 60 minutes whereby the polymerization induction period is lengthened as a result of the treatment of the titanium trichloride with carbon monoxide.
Claim 2
Dependent Claim
180 words
A process for the manufacture of homopolymer or copolymer of an α-monoolefin of 2 to 6 carbon atoms by polymerizing the monomer or monomers at from 30° to 200° C. under a pressure of from 0.1 to 200 bars by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminium-alkyl component of the general formula AlR 3 or ClAlR 2 , where R is alkyl of 1 to 8 carbon atoms, in an atomic ration of titanium, from catalyst component (I), to aluminum, from catalyst component (II), of from 1:1 to 1:100, wherein the titanium trichloride component (I) employed is obtained by exposing a catalyst component consisting, or substantially consisting, of a titanium trichloride co-crystallizate with aluminum chloride of the formula TiCl 3 .1/3AlCl 3 , to a carbon monoxide atmosphere under a pressure of from 0.1 to 10 bars at from -20° to 100° C. for a period of from 0.5 to 60 minutes whereby the polymerization induction period is lengthened as a result of the treatment of the titanium trichloride with carbon monoxide.
Claim 3
Dependent Claim
35 words
The process of claim 1, wherein the treatment of the titanium trichloride component (I) with carbon monoxide is carried out under a pressure of from 0.5 to 1 bar at from 10° to 30° C.
Claim 4
Dependent Claim
29 words
The process of claim 1, wherein the treatment of the titanium trichloride component (I) with carbon monoxide is carried out for a period of from 5 to 15 minutes.
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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |