US4816547A
Expired / Lapsed
US
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Process for producing carbon dichalcogenide homopolymer and homopolymer produced thereby
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1988-02-02
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Granted: 1989-03-28
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Expires: 2008-02-02
Abstract
Abstract The present invention provides a process for producing carbon dichalcogen polymers having a conductivity of about 10 -8 S/cm without doping treatment which is increased to 10 -4 to 10 -2 S/cm by doping, by polymerizing carbon dichalcogenide monomers (carbon disulfide, carbon diselenide, etc.) in the form of a solution thereof under a low pressure in the presence of an anionic catalyst.
Inventors
- 👤 Jun Tsukamoto
- 👤 Akio Takahashi
- 👤 Kiichiro Matsumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:43
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G79/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
34 words
A process for preparing a carbon disulfide homopolymer or carbon diselenide homopolymer, which comprises homopolymerizing carbon disulfide monomer or carbon diselenide monomer, dissolved in a solvent, in the presence of an anionic polymerization catalyst.
Claim 2
Dependent Claim
34 words
A process for preparing a carbon disulfide homopolymer or carbon diselenide homopolymer, which comprises homopolymerizing carbon disulfide monomer or carbon diselenide monomer, dissolved in a solvent, in the presence of an anionic polymerization catalyst.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein the homopolymerization is carried out at a pressure of up to 10 atmospheres.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the homopolymerization is carried out at a temperature in the range of -100° to 50° C.
Claim 5
Dependent Claim
29 words
A process according to claim 1, wherein the polymerization is carried out at a temperature of up to 200° C. under an elevated pressure of up to 10 atm.
Claim 6
Dependent Claim
13 words
A process according to claim 1, wherein the solvent is a polar solvent.
Claim 7
Dependent Claim
14 words
A process according to claim 5, wherein the homopolymer is soluble in the solvent.
Claim 8
Dependent Claim
13 words
A process according to claim 1, wherein the solvent is a non-polar solvent.
Claim 9
Dependent Claim
35 words
A process according to claim 1, wherein the anionic catalyst is at least one compound selected from the group consisting of alkali metals, alkaline earth metals, alkali metal alkoxides, alkylalkali metals and alkylalkaline earth metals.
Claim 10
Dependent Claim
16 words
A process acording to claim 8, wherein the anionic polymerization catalyst is sodium, lithium or potassium.
Claim 11
Dependent Claim
26 words
A process according to claim 1, wherein the concentration of the anionic polymerization catalyst in the solvent is in the range of 0.001 to 3.0 mol/l.
Claim 12
Dependent Claim
14 words
A process according to claim 1, wherein the reaction is carried out under stirring.
Claim 13
Dependent Claim
17 words
A process according to claim 1, wherein the homopolymer has a conductivity of about 10 -8 mho/cm.
Claim 14
Dependent Claim
23 words
A carbon disulfide or carbon diselenide homopolymer obtained by the anionic polymerization of carbon disulfide or carbon diselenide monomer in an organic solvent.
Claim 15
Dependent Claim
23 words
A carbon disulfide or carbon diselenide homopolymer obtained by the anionic polymerization of carbon disulfide or carbon diselenide monomer in an organic solvent.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |