US4622266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable electrically conductive polymer compositions
Assignee: United States Department of the Navy
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Filing: 1985-05-30
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Granted: 1986-11-11
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Expires: 2005-05-30
Abstract
Abstract A salt of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and a structural polymerre dissolved in a mutual solvent. The solution is chilled and subsequently added to a liquid with which the solvent is miscible but in which the TCNQ and polymer are less soluble. A precipitate results which is a massive, conducting, moldable substance stable in atmospheric oxygen.
Inventors
- 👤 Oh-Kil Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:17
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/121; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
171 words
A method for producing a moldable composition comprising the following steps: a. selecting a moldable polymer from the group consisting of polycarbonate, poly(vinyl butyral), and poly(methyl methacrylate) with an ionization potential in the range of 8 eV to 12 eV; b. selecting as a first liquid a mutual solvent selected from the group consisting of dimethylformamide, dimethylsulfoxide, N,N-dimethylacetamide, tetrahydrofuran, and methylene chloride in which the said polymer and a TCNQ salt species are together soluble; c. dissolving in said mutual solvent at ambient temperature said moldable polymer together with an amount of said TCNQ salt species sufficient to coat and increase the conductivity of said moldable polymer; d. obtaining a precipitate by mixing the polymer/TCNQ salt species/mutual solvent solution formed in step (c) into a chilled second liquid selected from the group consisting of acetonitrile and lower alkyl alcohols, miscible with the mutual solvent, in which the TCNQ salt species and the polymer are less soluble; and e. isolating the TCNQ salt species-coated polymer moldable composite product formed in step (d).
Claim 2
Independent Claim
171 words
A method for producing a moldable composition comprising the following steps: a. selecting a moldable polymer from the group consisting of polycarbonate, poly(vinyl butyral), and poly(methyl methacrylate) with an ionization potential in the range of 8 eV to 12 eV; b. selecting as a first liquid a mutual solvent selected from the group consisting of dimethylformamide, dimethylsulfoxide, N,N-dimethylacetamide, tetrahydrofuran, and methylene chloride in which the said polymer and a TCNQ salt species are together soluble; c. dissolving in said mutual solvent at ambient temperature said moldable polymer together with an amount of said TCNQ salt species sufficient to coat and increase the conductivity of said moldable polymer; d. obtaining a precipitate by mixing the polymer/TCNQ salt species/mutual solvent solution formed in step (c) into a chilled second liquid selected from the group consisting of acetonitrile and lower alkyl alcohols, miscible with the mutual solvent, in which the TCNQ salt species and the polymer are less soluble; and e. isolating the TCNQ salt species-coated polymer moldable composite product formed in step (d).
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the polymer in said polymer selecting step has an ionization potential in the range of 9 eV to 11 eV.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the polymer in said polymer selecting step has an ionization potential in the range of 9 eV to 10 eV.
Claim 5
Dependent Claim
33 words
The method of claim 1 wherein the polymer in said polymer selecting step is polycarbonate, the mutual solvent in said solvent selecting step is dimethylformamide, and the second liquid a lower alkyl alcohol.
Claim 6
Dependent Claim
30 words
The method of claim 1 wherein the polymer in said polymer selecting step is polycarbonate, the solvent in said solvent selecting step is dimethylformamide, and the second liquid is ethanol.
Claim 7
Dependent Claim
30 words
The method of claim 3 wherein the polymer in said polymer selecting step is polycarbonate, the solvent in said solvent selecting step is dimethylformamide, and the second liquid is ethanol.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein the TCNQ salt is N-methylphenazinium TCNQ.
Claim 9
Dependent Claim
12 words
The method of claim 3 wherein the TCNQ salt is N-methylphenazinium TCNQ.
Claim 10
Dependent Claim
12 words
The method of claim 4 wherein the TCNQ salt is N-methylphenazinium TCNQ.
Claim 11
Dependent Claim
12 words
The method of claim 6 wherein the TCNQ salt is N-methylphenazinium TCNQ.
Claim 12
Dependent Claim
13 words
The method of claim 10 wherein the polycarbonate polymer is Bis-phenol A polycarbonate.
Claim 13
Dependent Claim
32 words
In the method of claim 1, the added step of chilling the polymer/TCNQ salt species/mutual solvent solution formed in step (c) prior to adding it to the second liquid in step (d).
Claim 14
Dependent Claim
74 words
A composite material containing a polymer selected from the group consisting of polycarbonate, poly(vinyl butyral), and poly(methyl methacrylate) and a TCNQ salt wherein: the polymers are formed as filaments; the TCNQ salt is in the form of micro-crystals adhering to each filament; and the filament are in intimate contact with one another such that electrical current may be conducted from TCNQ salt microcrystals on one filament to TCNQ salt microcrystals on an adjacent filament.
Claim 15
Dependent Claim
74 words
A composite material containing a polymer selected from the group consisting of polycarbonate, poly(vinyl butyral), and poly(methyl methacrylate) and a TCNQ salt wherein: the polymers are formed as filaments; the TCNQ salt is in the form of micro-crystals adhering to each filament; and the filament are in intimate contact with one another such that electrical current may be conducted from TCNQ salt microcrystals on one filament to TCNQ salt microcrystals on an adjacent filament.
Claim 16
Dependent Claim
19 words
The material of claim 13 wherein the polymer is Bisphenyl A polycarbonate and the TCNQ salt is N-methylphenazinium TCNQ.
Claim 17
Dependent Claim
15 words
The material of claim 13 wherein the cation of the TCNQ salt is an amine.
Claim 18
Dependent Claim
17 words
The material of claim 13 wherein the polymer is poly(vinylbutyral) and the TCNQ salt is N-methylphenazinium TCNQ.
Claim 19
Dependent Claim
18 words
The material of claim 13 wherein the polymer is poly(methyl methacrylate) and the TCNQ salt is N,N,N-triethylammonium TCNQ.
Claim 20
Dependent Claim
17 words
The material of claim 13 wherein the polymer is polycarbonate and the TCNQ salt is N-methylacridinium TCNQ.
Claim 21
Dependent Claim
25 words
The material of claim 13 wherein the cation of the TCNQ salt is a heterocyclic, nitrogen-containing aromatic species with a positive formal charge on nitrogen.
References Cited (Backward Citations)
US4374048A
Cited
US4529538A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
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