Electroconductive resin composition
First Claim
1. An electroconductive resin composition which comprises 100 parts by weight of a liquid-crystalline polymer (A) and 200 to 500 parts by weight of at least one species of graphite (B) selected from the group consisting of synthetic graphite, flake graphite and amorphous graphite, having a fixed carbon content of not less than 95% by weight and an average particle size of 50 to 200 μ
- m, as incorporated in said polymer, said composition resulting from melt-kneading under such conditions that the ratio Q/N, where Q (kg) is the hourly extrusion throughput rate during kneading and N (rpm) is the screw revolution rate, ay amount to 0.1 to 1.5, said composition having a volume resistivity of not more than 5×
10−
2 Ω
·
cm.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a resin material excellent in electric conductivity and judiciously usable in the manufacture of fuel cell separators and so forth. An electroconductive resin composition which comprises 100 parts by weight of a liquid-crystalline polymer (A) and 200 to 500 parts by weight of at least one species of graphite (B) selected from synthetic graphite, flake graphite and amorphous graphite with a fixed carbon content of not less than 95% by weight and an average particle size of 50 to 200 μm as incorporated in the polymer, the composition resulting from melt-kneading under such conditions that the ratio Q/N, where Q (kg) is the hourly extrusion throughput rate during kneading and N (rpm) is the screw revolution rate, may amount to 0.1 to 1.5, the composition having a volume resistivity of not more than 2×10−2 Ω·cm.
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Citations
20 Claims
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1. An electroconductive resin composition which comprises 100 parts by weight of a liquid-crystalline polymer (A) and 200 to 500 parts by weight of at least one species of graphite (B) selected from the group consisting of synthetic graphite, flake graphite and amorphous graphite, having a fixed carbon content of not less than 95% by weight and an average particle size of 50 to 200 μ
- m, as incorporated in said polymer, said composition resulting from melt-kneading under such conditions that the ratio Q/N, where Q (kg) is the hourly extrusion throughput rate during kneading and N (rpm) is the screw revolution rate, ay amount to 0.1 to 1.5, said composition having a volume resistivity of not more than 5×
10−
2 Ω
·
cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- m, as incorporated in said polymer, said composition resulting from melt-kneading under such conditions that the ratio Q/N, where Q (kg) is the hourly extrusion throughput rate during kneading and N (rpm) is the screw revolution rate, ay amount to 0.1 to 1.5, said composition having a volume resistivity of not more than 5×
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8. A method of preparing an electroconductive resin composition, which comprises incorporating 200 to 500 parts by weight of graphite (B) having a fixed carbon content of not less than 95% by weight and an average particle size of 50 to 200 μ
- m into 100 parts by weight of a liquid-crystalline polymer (A) and melt-kneading the resulting composition using an extruder under such conditions that the ratio Q/N, where Q (kg) is the hourly extrusion throughput rate during kneading and N (rpm) is the screw revolution rate, may amount to 0.1 to 1.5.
Specification
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- Resources
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Current AssigneePolyplastics Co., Ltd. (Daicel Corporation)
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Original AssigneePolyplastics Co., Ltd. (Daicel Corporation)
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InventorsUsami, Takashi, Miyashita, Takayuki
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Primary Examiner(s)Kopec; Mark
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Assistant Examiner(s)Thomas; Jaison P
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Application NumberUS10/562,116Publication NumberTime in Patent Office1,812 DaysField of Search252/500, 252/502, 429/34, 264/136US Class Current252/502CPC Class CodesB29C 2948/92161 Volume or quantityB29C 2948/922 Viscosity; Melt flow index ...B29C 2948/92209 TemperatureB29C 2948/92695 Viscosity; Melt flow index ...B29C 2948/92704 TemperatureB29C 48/03 characterised by the shape ...B29C 48/92 Measuring, controlling or r...B29L 2031/3468 Batteries, accumulators or ...C08L 89/00 Compositions of proteins; C...C08L 89/005 CaseinC09K 19/38 PolymersC09K 19/52 characterised by components...H01B 1/24 the conductive material com...H01M 8/0213 Gas-impermeable carbon-cont...H01M 8/0221 Organic resins; Organic pol...H01M 8/0226 in the form of mixturesY02E 60/50 Fuel cellsY02P 70/50 Manufacturing or production...
