US5141982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-conductive resin composition
Assignee: Panasonic Holdings Corp
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Filing: 1991-04-02
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Granted: 1992-08-25
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Expires: 2011-04-02
Abstract
Abstract The present invention relates to an electrically conductive resin composition used as sheilding materials against electromagnetic radiation and antistatic or static dissipative materials, having a stable electro-conductivity. Therefore, the resin composition according to the invention comprises a matrix resin blended with metal fibers and zinc whiskers in a tetrapod shape as shown in FIG. 1.
Inventors
- 👤 Mitsumasa Oku
- 👤 Motoi Kitano
- 👤 Koujiro Mastsuo
- 👤 Jyun Yagi
- 👤 Tadashi Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:32
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/08; C08K7/06; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
66 words
An electroconductive resin composition, which comprises a matrix resin at 100 weight parts, blended with metal fibers at 0.5 to 15 weight parts having a length of 0.5 to 10 mm and zinc oxide whiskers having a tetrapod needle crystal structure at 1 to 200 weight parts, having a length of 3 to 200 μm from the base to the tip of the needle crystal structure.
Claim 2
Dependent Claim
66 words
An electroconductive resin composition, which comprises a matrix resin at 100 weight parts, blended with metal fibers at 0.5 to 15 weight parts having a length of 0.5 to 10 mm and zinc oxide whiskers having a tetrapod needle crystal structure at 1 to 200 weight parts, having a length of 3 to 200 μm from the base to the tip of the needle crystal structure.
Claim 3
Dependent Claim
34 words
Electroconductive resin composition according to claim 1, wherein the zinc oxide whiskers in a tetrapod shape have a length of 5 to 100 μm from the base to the tip of needle crystal structure.
Claim 4
Dependent Claim
34 words
Electroconductive resin composition according to claim 2, wherein the zinc oxide whiskers in a tetrapod shape have a length of 10 to 50 μm from the base to the tip of needle crystal structure.
Claim 5
Dependent Claim
19 words
Electroconductive resin composition according to claim 1, wherein the metal fibers have a length of 1 to 10 mm.
Claim 6
Dependent Claim
19 words
Electroconductive resin composition according to claim 4, wherein the metal fibers have a length of 4 to 6 mm.
Claim 7
Dependent Claim
23 words
Electroconductive resin composition according to claim 1, wherein the content of the tetrapod shaped zinc oxide whisker is 5 to 100 weight parts.
Claim 8
Dependent Claim
23 words
Electroconductive resin composition according to claim 6, wherein the content of the tetrapod shaped zinc oxide whisker is 8 to 70 weight parts.
Claim 9
Dependent Claim
20 words
Electroconductive resin composition according to claim 1, wherein the content of the metal fiber is 0.5 to 3 weight parts.
Claim 10
Dependent Claim
20 words
Electroconductive resin composition according to claim 1, wherein the content of the metal fiber is 3 to 15 weight parts.
Claim 11
Dependent Claim
16 words
Electroconductive resin composition according to claim 1, wherein the metal fiber is a stainless steel one.
Claim 12
Dependent Claim
15 words
Electroconductive resin composition according to claim 1, wherein the metal fiber is a copper one.
Claim 13
Dependent Claim
25 words
Electroconductive resin composition according to claim 1, wherein the resistance value of the tetrapod shaped zinc oxide whisker is 10 2 to 10 11 Ω-cm.
Claim 14
Dependent Claim
25 words
Electroconductive resin composition according to claim 12, wherein the resistance value of the tetrapod shaped zinc oxide whisker is 10 6 to 10 10 Ω-cm.
Claim 15
Dependent Claim
25 words
Electroconductive resin composition according to claim 13, wherein the resistance value of the tetrapod shaped zinc oxide whisker is 10 7 to 10 9 Ω-cm.
References Cited (Backward Citations)
US5034447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |