US4702860A
Expired / Lapsed
US
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Current-conducting composition
Assignee: NAUCHNO-ISSLEDOVATELSKY INSTITUT KABELNOI PROMYSHLENNOSTI PO SREDAZKABEL USSR TASHKENT
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Filing: 1986-01-02
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Granted: 1987-10-27
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Expires: 2006-01-02
Abstract
Abstract A current-conducting composition comprising a polymeric base and a currenonducting carbon black with its carbon being chemically combined with 0.18-0.5% by mass of boron and having a specific adsorption surface area of 60 to 110 m 2 /g with the following proportions of the components, parts by mass: polymeric base: 100 current-conducting carbon black: 38-240.
Inventors
- 👤 Petr A. Kinderov
- 👤 Nikolai S. Volkov
- 👤 Natalia V. Vasilieva
- 👤 Regina T. Malashkina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:09
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A process for producing a current conducting composition comprising a polymeric base and a current-conducting carbon black which comprises (a) treating carbon black with a 5% aqueous solution of borax or boric acid. (b) drying at 110°-120° C. (c) heat treating in a weak reducing medium at a temperature within the range of about 2000°-2500° C., resulting in a current conducting carbon black, and (d) introducing the current conducting carbon black into a polymeric base of thermoplastics, thermosetting resins or elastomers wherein the current conducting carbon black is chemically combined with 0.18-0.5% by mass of boron and has a specific adsorption surface area of 60-110 m 2 /g, and the composition contains the following proportions of the components, parts by mass: polymeric base: 100 current-conducting carbon black: 38-240.
Claim 2
Dependent Claim
128 words
A process for producing a current conducting composition comprising a polymeric base and a current-conducting carbon black which comprises (a) treating carbon black with a 5% aqueous solution of borax or boric acid. (b) drying at 110°-120° C. (c) heat treating in a weak reducing medium at a temperature within the range of about 2000°-2500° C., resulting in a current conducting carbon black, and (d) introducing the current conducting carbon black into a polymeric base of thermoplastics, thermosetting resins or elastomers wherein the current conducting carbon black is chemically combined with 0.18-0.5% by mass of boron and has a specific adsorption surface area of 60-110 m 2 /g, and the composition contains the following proportions of the components, parts by mass: polymeric base: 100 current-conducting carbon black: 38-240.
Claim 3
Dependent Claim
18 words
A process, as in claim 1, wherein said composition has a stable resistivity of 0.0006 to 0.004 ohm·m.
Claim 4
Dependent Claim
51 words
A process, as in claim 1, wherein the polymeric base is chosen from one of the group consisting of natural rubber, isoprene rubber, butadiene-nitrite rubber, ethylene-propylene rubber, fluorinated rubber, urethane rubber. silicone rubber, further vulcanizing and extruding said composition, said composition having a stable electrical resistance of 0.007 to 0.01 ohm·m.
Claim 5
Dependent Claim
18 words
A process, as in claim 1, wherein said composition has a stable resistivity of 0.0006 to 0.4 ohm·M.
Claim 6
Dependent Claim
49 words
A process, as in claim 1, wherein the polymeric base is chosen from one of the group consisting of natural rubber, isoprene rubber, butadiene-nitrite rubber, ethylene-propylene rubber, fluorinated rubber, urethane rubber, silicone rubber, further vulcanizing and extruding said composition, said composition having a stable electrical resistance of 0.0006-0.035 ohm·M.
References Cited (Backward Citations)
SU758262A1
Cited
US4414142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |