US4181684A
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Diphenyl compounds that are intermediates in preparation of polymerization initiators
Assignee: Orkem SA
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Filing: 1977-08-05
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Granted: 1980-01-01
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Expires: 1997-08-05
Abstract
Abstract Organo-lithium compounds of the formula: ##STR1## wherein R is an alkyl group of up to 5 carbon atoms, R' is either hydrogen or an alkyl group of up to 5 carbon atoms and n is an integer from 2 to 10. These bifunctional organo-lithium compounds are prepared without the use of any polar or complexing agent and are useful as polymerization initiators for the production of block copolymers.
Inventors
- 👤 Pierre Sigwalt
- 👤 Patrick Guyot
- 👤 Michel Fontanille
- 👤 Jean-Pierre Vairon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:53
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/02; C08; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
An intermediate compound for polymerization initiators, said compound having the formula: ##STR5## wherein n is between 2 and 10 and R' is hydrogen or an alkyl group having 1 to 5 carbon atoms.
Claim 2
Dependent Claim
33 words
An intermediate compound for polymerization initiators, said compound having the formula: ##STR5## wherein n is between 2 and 10 and R' is hydrogen or an alkyl group having 1 to 5 carbon atoms.
Claim 3
Dependent Claim
13 words
The intermediate compound of claim 1, wherein said compound is 2,11-diphenyl 1,11 docecadiene.
Claim 4
Dependent Claim
13 words
The intermediate compound of claim 1, wherein said compound is 2,7-diphenyl 1,7, octadiene.
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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |