US4775500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive polymeric composite and method of making said composite
Assignee: Panasonic Holdings Corp
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Filing: 1987-04-24
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Granted: 1988-10-04
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Expires: 2007-04-24
Abstract
Abstract A method of making an electrically conductive polymeric composite, comprising the steps of crosslinking a first organic binder having a functional group to carbon black having a functional group so as to form a composition, fractionizing the composition, mixing the fractionized composition with the first organic binder or a second organic binder so as to form a mixture; and annealing the mixture.
Inventors
- 👤 Yasutomo Funakoshi
- 👤 Seishi Terakado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:15
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
144 words
A method of making an electrically conductive polymeric composite, comprising the steps of: kneading a polymeric binder with carbon black into an electrically conductive composition, both the polymeric binder and the carbon black containing functional groups capable of crosslinking with each other and wherein the carbon black occupies about 30 to 90% by weight of the electrically conductive composition; crosslinking the electrically conductive composition to affix the carbon black to the polymeric binder by means of an organic peroxide or by irradiation with electron rays; fractionalizing the electrically conductive composition into a powdery electrically conductive composition; kneading the powdery electrically conductive crosslinked composition with a molding material into a moldable composition; molding the moldable composition such that the moldable composition has a predetermined shape; and annealing the moldable composition at a temperature equal to or higher than the softening temperature of the molding material.
Claim 2
Independent Claim
144 words
A method of making an electrically conductive polymeric composite, comprising the steps of: kneading a polymeric binder with carbon black into an electrically conductive composition, both the polymeric binder and the carbon black containing functional groups capable of crosslinking with each other and wherein the carbon black occupies about 30 to 90% by weight of the electrically conductive composition; crosslinking the electrically conductive composition to affix the carbon black to the polymeric binder by means of an organic peroxide or by irradiation with electron rays; fractionalizing the electrically conductive composition into a powdery electrically conductive composition; kneading the powdery electrically conductive crosslinked composition with a molding material into a moldable composition; molding the moldable composition such that the moldable composition has a predetermined shape; and annealing the moldable composition at a temperature equal to or higher than the softening temperature of the molding material.
Claim 3
Dependent Claim
32 words
A method as claimed in claim 1, wherein the polymeric binder is a polyolefin composition which contains a crystalline component having a crystallinity of not less than 20 percent by X-ray analysis.
Claim 4
Dependent Claim
15 words
A method as claimed in claim 1, wherein the molding material is a thermoplastic rubber.
Claim 5
Dependent Claim
17 words
A method as claimed in claim 2, wherein the molding material is an olefin series thermoplastic rubber.
Claim 6
Dependent Claim
47 words
A method as claimed in claim 1, wherein functional groups are introduced into the carbon black by means of a silane coupling agent diluted in a solvent and then agitated and dried together with the carbon black so as to coat the surface of the carbon black.
Claim 7
Dependent Claim
47 words
A method as claimed in claim 2, wherein functional groups are introduced into the carbon black by means of a silane coupling agent diluted in a solvent and then agitated and dried together with the carbon black so as to coat the surface of the carbon black.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 1, wherein the carbon black occupies not more than 90 weight percent of the electrically conductive composition.
Claim 9
Dependent Claim
24 words
A method as claimed in claim 1 in which the electrically conductive powder has an average particle diameter of not more than 200 microns.
Claim 10
Independent Claim
153 words
A method of making an electrically conductive polymeric composite, comprising the steps of: kneading a polymeric binder with carbon black into an electrically conductive composition, both the polymeric binder and the carbon black containing functional groups capable of crosslinking with each other and wherein the carbon black occupies about 30 to 90% by weight of the electrically conductive composition; crosslinking the electrically conductive composition to affix the carbon black to the polymeric binder by means of an organic peroxide or by irradiation with electron rays; fractionalizing the electrically conductive composition into a powdery electrically conductive composition; kneading the powdery electrically conductive crosslinked composition with a molding material into a moldable composition; molding the moldable composition such that the moldable composition has a predetermined shape; mounting a pair of electrodes on the moldable composition; and annealing the moldable composition at a temperature equal to or higher than the softening temperature of the molding material.
Claim 11
Independent Claim
153 words
A method of making an electrically conductive polymeric composite, comprising the steps of: kneading a polymeric binder with carbon black into an electrically conductive composition, both the polymeric binder and the carbon black containing functional groups capable of crosslinking with each other and wherein the carbon black occupies about 30 to 90% by weight of the electrically conductive composition; crosslinking the electrically conductive composition to affix the carbon black to the polymeric binder by means of an organic peroxide or by irradiation with electron rays; fractionalizing the electrically conductive composition into a powdery electrically conductive composition; kneading the powdery electrically conductive crosslinked composition with a molding material into a moldable composition; molding the moldable composition such that the moldable composition has a predetermined shape; mounting a pair of electrodes on the moldable composition; and annealing the moldable composition at a temperature equal to or higher than the softening temperature of the molding material.
Claim 12
Dependent Claim
32 words
A method as claimed in claim 9, wherein the polymeric binder is a polyolefin composition which contains a crystalline component having a crystallinity of not less than 20 percent by X-ray analysis.
Claim 13
Dependent Claim
15 words
A method as claimed in claim 9, wherein the molding composition is a thermoplastic rubber.
Claim 14
Dependent Claim
17 words
A method as claimed in claim 10, wherein the molding composition is an olefin series thermoplastic rubber.
Claim 15
Dependent Claim
40 words
A method as claimed in claim 9, wherein a silane coupling agent is diluted in a solvent and then is agitated and dried together with the carbon black so as to be coated on a surface of the carbon black.
Claim 16
Dependent Claim
47 words
A method claimed as in claim 9, wherein functional groups are introduced into the carbon black by means of a silane coupling agent diluted in a solvent and then agitated and dried together with the carbon black so as to coat the surface of the carbon black.
Claim 17
Dependent Claim
23 words
A method as claimed in claim 9, wherein the electrically conductive powder has an average particle diameter of not more than 200 microns.
Claim 18
Dependent Claim
23 words
An electrically conductive polymeric composite produced according to claim 10 in which the carbon black occupies 25-50 percent of the electrically conductive composite.
Claim 19
Dependent Claim
21 words
An electrically conductive polymeric composite produced according to claim 9 in which the carbon black occupies 25-50 percent of the composite.
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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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |