Patent US5322874A successfully refreshed from Google Patents.
US5322874A
Expired / Lapsed
US
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Electroconductive resin composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1992-11-23
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Granted: 1994-06-21
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Expires: 2012-11-23
Abstract
Abstract Disclosed is an electroconductive resin composition comprising 100 parts by weight of a polyphenylene ether, 1 to 50 parts by weight of a diamide compound and 5 to 35 parts by weight of a carbon black having a dibutyl phthalate absorption of 70 ml/100 mg or more. This composition is excellent in electroconductivity, processability and heat resistance.
Inventors
- 👤 Takeshi Fujii
- 👤 Manabu Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:41
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K5/00; C08K5/16; C08K5/20; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; H01B1/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
An electroconductive resin composition which comprises: (a) 100 parts by weight of a polyphenylene ether or a mixture of a polyphenylene ether and a styrene resin having a weight ratio of polyphenylene ether and styrene resin of 100/0 to 30/70, (b) 1 to 50 parts by weight of a diamide compound, (c) 5 to 35 parts by weight of a Ketjen carbon black having a dibutyl phthalate absorption of 70 ml/100 mg or more, (d) 0 to 50 parts by weight of a rubber-like material, (e) 0 to 50 parts by weight of an electro-conductive inorganic filler, and (f) 0 to 20 parts by weight of a polyolefin.
Claim 2
Dependent Claim
108 words
An electroconductive resin composition which comprises: (a) 100 parts by weight of a polyphenylene ether or a mixture of a polyphenylene ether and a styrene resin having a weight ratio of polyphenylene ether and styrene resin of 100/0 to 30/70, (b) 1 to 50 parts by weight of a diamide compound, (c) 5 to 35 parts by weight of a Ketjen carbon black having a dibutyl phthalate absorption of 70 ml/100 mg or more, (d) 0 to 50 parts by weight of a rubber-like material, (e) 0 to 50 parts by weight of an electro-conductive inorganic filler, and (f) 0 to 20 parts by weight of a polyolefin.
Claim 3
Dependent Claim
24 words
A resin composition according to claim 1, wherein the polyphenylene ether of the component (a) has an intrinsic viscosity of 0.3 to 0.6 dl/g.
Claim 4
Dependent Claim
24 words
A resin composition according to claim 1, wherein the styrene resin of the component (a) is a styrene homopolymer and/or a rubber reinforced polystyrene.
Claim 5
Dependent Claim
105 words
A resin composition according to claim 1, wherein the diamide compound of the component (b) is represented by the following formula: ##STR4## wherein R 1 represents a straight chain or branched chain saturated or unsaturated hydrocarbon residue, an alicyclic hydrocarbon residue or an aromatic hydrocarbon residue of 2 to 20 carbon atoms or a derivative residue thereof and R 2 and R 3 each represents a saturated or unsaturated straight chain or branched chain hydrocarbon residue, alicyclic hydrocarbon residue or aromatic hydrocarbon residue of 1 to 10 carbon atoms or a derivative residue thereof and R 2 and R 3 may be identical or different.
Claim 6
Dependent Claim
20 words
A resin composition according to claim 1, wherein the electroconductive inorganic filler of the component (e) is a carbon fiber.
Claim 7
Dependent Claim
21 words
A resin composition according to claim 1, wherein the electroconductive inorganic filler of the component (e) is a stainless steel fiber.
Claim 8
Dependent Claim
21 words
A resin composition according to claim 1, wherein the electroconductive inorganic filler of the component (e) is a potassium titanate whisker.
Claim 9
Dependent Claim
23 words
A resin composition according to claim 1, wherein the polyolefin of the component (f) is a low-density polyethylene or a linear low-density polyethylene.
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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) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |