US4774024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive polymer compositions
Assignee: Tyco International Ltd Bermuda
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Filing: 1985-03-14
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Granted: 1988-09-27
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Expires: 2005-03-14
Abstract
Abstract Conductive polymer compositions, particularly PTC compositions, which contain alumina trihydrate, or another arc-controlling agent, and a lubricant or coupling agent. Advantages which can result from use of the lubricant or coupling agent include improved PTC behavior and improved adhesion to metal conductors, in particular metal foils and solid metal wires.
Inventors
- 👤 Marguerite E. Deep
- 👤 Nelson H. Thein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:03
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/02; H01C7/027; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
134 words
A conductive polymer composition which comprises (1) a polymeric component; (2) a particulate conductive filler component comprising carbon black which is dispersed in the polymeric component; (3) an arc-controlling agent which (i) comprises a particulate compound which, when heated in the absence of air, decomposes to give H 2 O, CO 2 , or N 2 , and (ii) is present at 7 to 25% by volume of the composition; and (4) a lubricant or coupling agent for the arc-controlling agent, said lubricant or coupling agent comprising an organo-silicon compound, a stearate or a titanate which is (i) precoated onto the arc-controlling agent, and (ii) if the lubricant or coupling agent is not pre-coated onto the arc-controlling agent, the lubricant or coupling agent is present at at least 0.5% by volume of the composition.
Claim 2
Dependent Claim
134 words
A conductive polymer composition which comprises (1) a polymeric component; (2) a particulate conductive filler component comprising carbon black which is dispersed in the polymeric component; (3) an arc-controlling agent which (i) comprises a particulate compound which, when heated in the absence of air, decomposes to give H 2 O, CO 2 , or N 2 , and (ii) is present at 7 to 25% by volume of the composition; and (4) a lubricant or coupling agent for the arc-controlling agent, said lubricant or coupling agent comprising an organo-silicon compound, a stearate or a titanate which is (i) precoated onto the arc-controlling agent, and (ii) if the lubricant or coupling agent is not pre-coated onto the arc-controlling agent, the lubricant or coupling agent is present at at least 0.5% by volume of the composition.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein the arc-controlling agent is alumina trihydrate.
Claim 4
Dependent Claim
18 words
A composition according to claim 2 wherein the lubricant or coupling agent is coated onto the alumina trihydrate.
Claim 5
Dependent Claim
12 words
A composition according to claim 3 which comprises a silane-coated alumina trihydrate.
Claim 6
Dependent Claim
12 words
A composition according to claim 3 which comprises a stearate-coated alumina trihydrate.
Claim 7
Dependent Claim
12 words
A composition according to claim 3 which comprises a titanate-coated alumina trihydrate.
Claim 8
Dependent Claim
18 words
A composition according to claim 1 wherein the lubricant or coupling agent is pre-coated onto the arc-controlling agent.
Claim 9
Dependent Claim
17 words
A composition according to claim 1 which exhibits PTC behavior and which has been cross-linked by radiation.
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |