US3928304A
Expired / Lapsed
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Method of making polyolefins using organotin chromate polymerization catalyst
Assignee: Chemplex Co
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Filing: 1974-12-20
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Granted: 1975-12-23
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Expires: 1994-12-20
Abstract
Abstract and cocatalytic amounts of an alkyl aluminum compound of the formula RaAlXb in each of which formula each R is a hydrocarbyl radical containing from 1 to about 14 carbon atoms and all R''s are the same or different, X is a halogen or an alkoxy group, a is an integer of 1-3, b is an integer of 0-2 and the sum of a and b is 3. The method of making polymers from polymerizable 1-olefins which comprises polymerizing at least one of said olefins under polymerizing conditions with a catalyst system comprising a mixture of a bis-trihydrocarbyltin chromate essentially of the formula:
Inventors
- 👤 Thomas Pullukat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
THE METHOD OF MAKING POLYMERS FROM POLYMERIZABLE 1OLEFINS WHICH COMPRISES POLYMERIZING AT LEAST ONE OF SAID OLEFINS UNDER POLYMERIZING CONDITIONS WITH A CATALYST SYSTEM COMPRISING AN ORGANOTIN CHROMATE ESSENTIALLY OF THE FORMULA
Claim 2
Independent Claim
32 words
THE METHOD OF MAKING POLYMERS FROM POLYMERIZABLE 1OLEFINS WHICH COMPRISES POLYMERIZING AT LEAST ONE OF SAID OLEFINS UNDER POLYMERIZING CONDITIONS WITH A CATALYST SYSTEM COMPRISING AN ORGANOTIN CHROMATE ESSENTIALLY OF THE FORMULA
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said mixture is adsorbed on an insoluble, inorganic material having high surface area.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said chromate is in an inert organic solvent.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said system has an aluminum-chromium ratio of 2:1.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said system has an aluminum-chromium ratio of 2 to 30:1.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said system has an aluminum-chromium ratio of 4 to 15:1.
Claim 8
Dependent Claim
10 words
The method of claim 1 wherein said olefin is ethylene.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein said polymerizing is at a temperature of about 30*-200*C. and at a pressure sufficient to bring about said polymerizing.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |