US3887536A
Expired / Lapsed
US
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Process for preparing poly-1,4-trans butadiene
Assignee: Sagami Chemical Research Institute
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Filing: 1973-06-01
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Granted: 1975-06-03
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Expires: 1993-06-01
Abstract
Abstract Poly-1,4-trans butadiene is prepared by polymerizing butadiene in the presence of a catalyst consisting of either an alkali metal and alkylamine or alkenylamine, or of an alkali metal, graphite and alkylamine or alkenylamine. The resulting polymer is used for making films or fibers.
Inventors
- 👤 Masaru Ichikawa
- 👤 Tamio Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:35
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
14 words
A METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AND
Claim 2
Dependent Claim
14 words
A METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM, AND
Claim 3
Dependent Claim
14 words
a metal selected from the group consisting of sodium, potassium, rubidium and cesium, and
Claim 4
Dependent Claim
14 words
a metal selected from the group consisting of sodium, potassium, rubidium and cesium, and
Claim 5
Dependent Claim
22 words
A PROCESS FOR PREPARING POLYBUTADIENE OF PREDOMINANTLY TRANS 1,4 STRUCTURE WHICH COMPRISES: POLYMERIZING BUTADIENE IN THE PRESENCE OF A CATALYST CONSISTING OF:
Claim 6
Dependent Claim
22 words
A PROCESS FOR PREPARING POLYBUTADIENE OF PREDOMINANTLY TRANS 1,4 STRUCTURE WHICH COMPRISES: POLYMERIZING BUTADIENE IN THE PRESENCE OF A CATALYST CONSISTING OF:
Claim 7
Dependent Claim
22 words
A process for preparing polybutadiene of predominantly trans 1,4 structure which comprises: polymerizing butadiene in the presence of a catalyst consisting of:
Claim 8
Dependent Claim
22 words
A process for preparing polybutadiene of predominantly trans 1,4 structure which comprises: polymerizing butadiene in the presence of a catalyst consisting of:
Claim 9
Dependent Claim
29 words
AN ALKYLAMINE OR AN ALKENYLAMINE IN AN ATMOSPHERE AT A TEMPERATURE OF FROM -20*C TO 70*C AT THE WEIGHT RATIO OF METAL TO ALKYLAMINE OR ALKENYLAMINE BEING ABOUT 1:10-10:1.
Claim 10
Dependent Claim
29 words
AN ALKYLAMINE OR AN ALKENYLAMINE IN AN ATMOSPHERE AT A TEMPERATURE OF FROM -20*C TO 70*C AT THE WEIGHT RATIO OF METAL TO ALKYLAMINE OR ALKENYLAMINE BEING ABOUT 1:10-10:1.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |