US4048095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimony halide catalyst system
Assignee: Kraton Chemical LLC
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Filing: 1976-05-12
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Granted: 1977-09-13
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Expires: 1996-05-12
Abstract
Abstract There is provided a process for cationically polymerizing or co-polymerizing batchwise or continuously α-pinene by adding α-pinene either alone or in admixture with other terpene monomers, incrementally to a catalyst system comprising an aluminum halide and an antimony halide in the presence or absence of a (lower)alkyl, alkenyl or aralkyl halide in an inert solvent while controlling the temperature of reaction in the range of -30° C. to +30° C., drowning the polymerization mixture in water, separating the organic phase therefrom, removing the solvent therefrom and recovering a solid polymer in good yield.
Inventors
- 👤 Ronald Thomas Wojcik
- 👤 Erwin Richard Ruckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
C; C08; C08F; C08F32/00; C08F32/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
A catalyst system adapted for use in carbocationic polymerization which consists essentially of (1) from 30% to 10% of an antimony halide and (2) from 70% to 85% of aluminum chloride or aluminum bromide or mixtures of the latter.
Claim 2
Dependent Claim
39 words
A catalyst system adapted for use in carbocationic polymerization which consists essentially of (1) from 30% to 10% of an antimony halide and (2) from 70% to 85% of aluminum chloride or aluminum bromide or mixtures of the latter.
Claim 3
Dependent Claim
34 words
The catalyst system according to claim 1 wherein an amount ranging from 0% to 5% of adjuvant selected from the group consisting of lower alkyl halide, lower alkenyl halide and aralkyl halide is included.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |