US3665062A
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Preparation of conjugated diene polymers using atecompound catalysts
Assignee: Bridgestone Corp
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Filing: 1969-09-08
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Granted: 1972-05-23
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Expires: 1989-09-08
Abstract
Abstract Conjugated diene polymers having a microstructure consisting of about 70% of trans-1,4-structure, about 20 percent of cis-1,4structure and about 10 percent of 1,2- or 3,4-structure is prepared by polymerizing (1) at least one conjugated diene or (2) a mixture of a conjugated diene and a vinyl-substituted aromatic hydrocarbon by using an ''''Ate-compound'''' catalyst having the following general formula M1M2R1R2R3R4 wherein M1 is calcium, strontium or barium, M2 is zinc or cadmium, and R1, R2, R3 and R4 are aliphatic, cycloaliphatic or aromatic hydrocarbon radicals containing from one-ten carbon atoms.
Inventors
- 👤 Akira Onishi
- 👤 Ryota Fujio
- 👤 Minoru Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
A process according to claim 1, wherein said monomeric material is 1,3-butadiene.
Claim 2
Dependent Claim
12 words
A process according to claim 1, wherein said monomeric material is isoprene.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein said monomeric material is a mixture of 1,3-butadiene and styrene.
Claim 4
Dependent Claim
11 words
A process according to claim 1, wherein said catalyst is bariumzinctetrabutyl.
Claim 5
Dependent Claim
11 words
A process according to claim 1, wherein said catalyst is strontiumzinctetraethyl.
Claim 6
Dependent Claim
11 words
A process according to claim 1, wherein said catalyst is calciumzinctetraethyl.
Claim 7
Dependent Claim
27 words
A process according to claim 1, wherein the amount of said catalyst is in the range of 0.5 to 50 millimoles per mole of said monomeric material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |