US4391738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for olefinic polymerization
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-01-28
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Granted: 1983-07-05
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Expires: 2002-01-28
Abstract
Abstract A new improved catalyst system for alpha-olefin type polymerizations includes a metal alkyl compound selected from the group consisting of R2WY or R3W and an organomagnesium compound R'MgX in combination with a Group IVB-VIII transition metal compound. The improved catalyst system provides both increased polymerization activity and polymers having a high degree of isotactic stereoregularity.
Inventors
- 👤 Arthur W. Langer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/02; C08F4/022; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
An improved catalyst composition adaptable for use in an alpha-olefin polymerization which consists of: (a) TiCl 4 supported on MgCl 2 , said TiCl 4 supported on MgCl 2 prepared by ball milling said TiCl 4 , MgCl 2 and ethyl benzoate; (b) diethylaluminum chloride; and (c) a mono-organomagnesium compound having the formula: R'MgX wherein R' is a sec-butyl group and X is selected from the group consisting of Cl, OOCφ, OC 15 H 31 , OC 2 H 5 , SC 12 H 25 and Os-Bu.
Claim 2
Dependent Claim
87 words
An improved catalyst composition adaptable for use in an alpha-olefin polymerization which consists of: (a) TiCl 4 supported on MgCl 2 , said TiCl 4 supported on MgCl 2 prepared by ball milling said TiCl 4 , MgCl 2 and ethyl benzoate; (b) diethylaluminum chloride; and (c) a mono-organomagnesium compound having the formula: R'MgX wherein R' is a sec-butyl group and X is selected from the group consisting of Cl, OOCφ, OC 15 H 31 , OC 2 H 5 , SC 12 H 25 and Os-Bu.
References Cited (Backward Citations)
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GB1235062A
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GB1436426A
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |