Patent US4705645A successfully refreshed from Google Patents.
US4705645A
Expired / Lapsed
US
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Method for preparing an electrically conductive polymer blend
Assignee: Verizon Laboratories Inc
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Filing: 1984-12-21
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Granted: 1987-11-10
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Expires: 2004-12-21
Abstract
Abstract Electrically conductive polymer blends of an acetylene polymer and an elastomer having a low level of unsaturation are disclosed herein. The low level of unsaturation provides resistance to heat, light, oxygen and ozone and yet provides sufficient sites for crosslinking of the blend to provide increased stability. These blends exhibit high conductivity upon doping with electron donors or electron acceptors.
Inventors
- 👤 Kang I. Lee
- 👤 Harriet Jopson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:17
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; C; C08; C08L; C08L49/00; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/125; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A method of preparing an electrically conductive polymer blend comprising: a. forming an acetylene polymer within a matrix of an elastomer having a low level of unsaturation, said elastomer comprising a copolymer of a monoethylenically unsaturated monomer with a diene; and b. doping said acetylene polymer with an electron donor or an electron acceptor to a level sufficient to provide said blend with an electrical conductivity of at least about 10 -6 ohm -1 cm -1 .
Claim 2
Independent Claim
77 words
A method of preparing an electrically conductive polymer blend comprising: a. forming an acetylene polymer within a matrix of an elastomer having a low level of unsaturation, said elastomer comprising a copolymer of a monoethylenically unsaturated monomer with a diene; and b. doping said acetylene polymer with an electron donor or an electron acceptor to a level sufficient to provide said blend with an electrical conductivity of at least about 10 -6 ohm -1 cm -1 .
Claim 3
Dependent Claim
11 words
A method of claim 1 wherein said acetylene polymer comprises poly(acetylene).
Claim 4
Dependent Claim
63 words
A method of claim 2 wherein poly(acetylene) is formed within the matrix of an elastomer having a low level of unsaturation by dissolving said elastomer in a solvent containing an acetylene polymerization catalyst, subsequently removing solvent to form a film of elastomer containing catalyst and thereafter exposing said film to acetylene gas at temperatures sufficient for polymerization to occur within the elastomer film.
Claim 5
Dependent Claim
50 words
A method of claim 3 wherein poly(acetylene) is formed within the matrix of an elastomer having a low level of unsaturation by dissolving said elastomer in a solvent containing an acetylene polymerization catalyst, bubbling acetylene gas through such solution and subsequently casting a film of polymer blend from said solution.
Claim 6
Dependent Claim
23 words
A method of claim 3 or 4 wherein said polymerization catalyst comprises a mixture of titanium tetrabutoxide and triethylaluminum in a solvent therefor.
Claim 7
Dependent Claim
19 words
A method of claim 5 wherein the temperature of polymerization is maintained between about -78° C. and room temperature.
Claim 8
Dependent Claim
17 words
A method of claim 1 wherein the elastomer having a low level of unsaturation is ethylene-propylene-diene terpolymer.
Claim 9
Independent Claim
92 words
A method of preparing an electrically conductive crosslinked polymer blend comprising: a. forming an acetylene polymer within a matrix of an elastomer having a low level of unsaturation, said elastomer comprising a copolymer of a monoethylenically unsaturated monomer with a diene; b. crosslinking said elastomer matrix under conditions which do not damage the poly(acetylene) and employ only the unsaturated double bonds for crosslinking; and c. thereafter doping said blend with an electron donor or an electron acceptor to produce an electrical conductivity of at least 10 -6 ohm -1 cm -1 .
Claim 10
Independent Claim
92 words
A method of preparing an electrically conductive crosslinked polymer blend comprising: a. forming an acetylene polymer within a matrix of an elastomer having a low level of unsaturation, said elastomer comprising a copolymer of a monoethylenically unsaturated monomer with a diene; b. crosslinking said elastomer matrix under conditions which do not damage the poly(acetylene) and employ only the unsaturated double bonds for crosslinking; and c. thereafter doping said blend with an electron donor or an electron acceptor to produce an electrical conductivity of at least 10 -6 ohm -1 cm -1 .
Claim 11
Dependent Claim
11 words
A method of claim 8 wherein said acetylene polymer comprises poly(acetylene).
Claim 12
Dependent Claim
16 words
A method of claim 9 wherein crosslinking is achieved by irradiating said blend with ionizing radiation.
Claim 13
Dependent Claim
11 words
A method of claim 10 wherein ionizing radiation comprises gamma rays.
Claim 14
Dependent Claim
17 words
An electrically conductive cross linked polymer blend formed by a method of claim 8, 9, or 11.
Claim 15
Dependent Claim
17 words
A method of claim 8 wherein the elastomer having a low level of unsaturation is ethylene-propylene-diene terpolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |