US3950268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the polymerization of olefins
Assignee: Standard Oil Co
•
Filing: 1974-07-15
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Granted: 1976-04-13
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Expires: 1994-07-15
Abstract
Abstract A novel catalyst for producing crystalline poly alpha-olefins in excellent yields which coproduces substantially zero percent of low-molecular-weight and amorphous polymers is herein described. This novel catalyst is useful in polymerization techniques which use a solvent or those in which condensed monomer is the liquid phase or those in which polymerization is accomplished using monomer substantially in the vapor phase.
Inventors
- 👤 Nicholas M. Karayannis
- 👤 Sam S. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:31
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A composition useful for the polymerization of propylene to highly crystalline polypropylene made by combining a sulfide of a bis-(trialkyl)-tin radical wherein the alkyl groups contain between one and six carbon atoms with a dialkylaluminum halide and activated titanium trichloride.
Claim 2
Dependent Claim
40 words
A composition useful for the polymerization of propylene to highly crystalline polypropylene made by combining a sulfide of a bis-(trialkyl)-tin radical wherein the alkyl groups contain between one and six carbon atoms with a dialkylaluminum halide and activated titanium trichloride.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein said sulfide is bis-(tributyl)tin sulfide and the dialkylaluminum halide is diethylaluminum chloride.
Claim 4
Dependent Claim
62 words
A composition useful for the polymerization of propylene to highly crystalline polypropylene made by combining a sulfide of a bis-(tributyl)-tin radical wherein the alkyl groups contain between one and six carbon atoms and 2,6lutidine-N-oxide with a dialkylaluminum halide and activated titanium trichloride wherein the amount of said 2,6-lutidine-N-oxide runs between about 5 and about 15 mol percent of the dialkylaluminum halide used.
Claim 5
Dependent Claim
62 words
A composition useful for the polymerization of propylene to highly crystalline polypropylene made by combining a sulfide of a bis-(tributyl)-tin radical wherein the alkyl groups contain between one and six carbon atoms and 2,6lutidine-N-oxide with a dialkylaluminum halide and activated titanium trichloride wherein the amount of said 2,6-lutidine-N-oxide runs between about 5 and about 15 mol percent of the dialkylaluminum halide used.
Claim 6
Dependent Claim
18 words
The composition of claim 3 wherein said sulfide is bis-(tributyl)tin sulfide and the dialkylaluminum halide is diethylaluminum chloride.
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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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |