← Back to Patent Explorer
US4765928A Expired / Lapsed US ⏱️ 0.0 years remaining

Intrinsically conductive doped polymers of enhanced stability

Assignee: Individual
•
Filing: 1985-08-19
•
Granted: 1988-08-23
•
Expires: 2005-08-19
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract This invention relates to the discovery of a novel class of intrinsically electrically conductive doped solid organic homopolymers having a conductivity when measured by the four point probe method at standard temperature conditions within the range of about 10 -3 to 10 ohms -1 cm -1 developed by either treatment of the organic polymer surface with an electron donor or an electron acceptor dopant. The individual "mer" unit of the useful polymeric class of homopolymers for the purposes of accepting the dopant treatment consist of homopolymers having the repeating general structure: ##STR1## wherein the useful members of this class require that the R 1 and R 2 substituents in the illustrated structured "mer" are not both hydrogen substituents. However, in many instances of individual operative members of the class R 1 and R 2 may be otherwise a halogen or moities of a simple hydrocarbon structure, particularly methyl, when alkyl group extended chains, such as isopropyl, have been equated by theoretical comparison, likewise, it is also established that the simple phenyl (aromatic) group is also functionally useful. The "mer" units of the polymer are isolated which is in contrast with prior art polymers which have been suggested or useful which contain conjugated bond structures.

Inventors

  • 👤 Mrinal Thakur

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 04:09
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/125; C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/14; C08L; C08L9/00

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 169 words
An electrically conductive doped, solid organic homopolymer characterized by an electrical conductivity when measured by the four point probe method at standard temperature reading within the illustrative range of 10 -9 to 10 2 mhos/cm., said conductive polymeric composition comprising a dopant treated homopolymer, the mer units thereof each having the chemical structure: ##STR7## wherein R 1 and R 2 are selected from the class consisting of hydrogen, halogen and hydrocarbon moieties: wherein when R 1 or R 2 is specifically hydrogen substituted the remaining R 1 or R 2 is selected from the class consisting of halogen and hydrocarbon moieties; in which case the halogen is selected from the group consisting of chlorine, bromine, and iodine and said hydrocarbon moiety consists of methyl, ethyl, propyl and phenyl groups; with the added proviso and limitation relative thereto that in no instance are both R 1 and R 2 mutually hydrogen substituted: and said dopant is selected from the dopant class consisting of electron donor dopants and electron acceptor dopants.
Claim 2
Dependent Claim 169 words
An electrically conductive doped, solid organic homopolymer characterized by an electrical conductivity when measured by the four point probe method at standard temperature reading within the illustrative range of 10 -9 to 10 2 mhos/cm., said conductive polymeric composition comprising a dopant treated homopolymer, the mer units thereof each having the chemical structure: ##STR7## wherein R 1 and R 2 are selected from the class consisting of hydrogen, halogen and hydrocarbon moieties: wherein when R 1 or R 2 is specifically hydrogen substituted the remaining R 1 or R 2 is selected from the class consisting of halogen and hydrocarbon moieties; in which case the halogen is selected from the group consisting of chlorine, bromine, and iodine and said hydrocarbon moiety consists of methyl, ethyl, propyl and phenyl groups; with the added proviso and limitation relative thereto that in no instance are both R 1 and R 2 mutually hydrogen substituted: and said dopant is selected from the dopant class consisting of electron donor dopants and electron acceptor dopants.
Claim 3
Dependent Claim 14 words
The electrically conductive homopolymer of claim 1, wherein the homopolymer is a polychloroisoprene polymer.
Claim 4
Dependent Claim 13 words
The conductive homopolymer of claim 1 wherein the homopolymer is a polyisoprene homopolymer.
Claim 5
Dependent Claim 20 words
The conductive homopolymer of claim 1 wherein R 1 is a hydrogen atom and R 2 is a halogen atom.
Claim 6
Dependent Claim 28 words
The conductive polymer of claim 1, wherein R 1 is a hydrogen atom and R 2 is a aliphatic hydrocarbon moiety having not more than three carbon atoms.
Claim 7
Dependent Claim 20 words
The conductive polymer of claim 1, wherein R 1 is a hydrogen atom and R 2 is a methyl group.
Claim 8
Dependent Claim 16 words
The conductive polymer of claim 1, wherein both R 1 and R 2 are methyl groups
Claim 9
Dependent Claim 20 words
The conductive polymer of claim 1 wherein R 1 is a hydrogen atom and R 2 is a phenyl group.
Claim 10
Dependent Claim 13 words
The conductive polymer of claim 1 wherein the dopant treatment comprises elemental iodine.
Claim 11
Dependent Claim 20 words
The conductive polymer of claim 1 wherein R 1 is a hydrogen group and R 2 is a chlorine group.
Claim 12
Dependent Claim 32 words
The electrically conductive doped solid organic homopolymers of claim 1, further characterized by an electrical conductivity of the selected homopolymer within the range of 10 -3 to 10 2 mhos per cm.

References Cited (Backward Citations)

US4204216A Cited
US4222903A Cited
US4230604A Cited
US4269738A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-08-23 1992-02-22 1992-08-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-08-23 1996-02-22 1996-08-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-08-23 2000-02-22 2000-08-23 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag