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US4587039A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrically-conductive resin composition

Assignee: Eneos Corp
•
Filing: 1984-08-06
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Granted: 1986-05-06
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Expires: 2004-08-06
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Abstract

Abstract Provided is an electrically-conductive resin composition comprising an ethylene/ alpha -olefin copolymer and carbon black, said ethylene/ alpha -olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with an alpha -olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium: (i) Melt index: 0.01-100 g/10 min (ii) Density: 0.860-0.930 g/cm3 (iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100 DEG C. (iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.

Inventors

  • 👤 Noboru Yamaoka
  • 👤 Seiju Kezuka
  • 👤 Moriya Iida
  • 👤 Mituji Miyoshi
  • 👤 Kazuo Matsuura

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 05:33
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 116 words
An electrically-conductive resin composition consisting essentially of an ethylene/α-olefin copolymer, wherein said α-olefin is propylene, butene-1,4-methylpentene-1 or hexene-1, and 10 to 60 weight percent based on the total weight of the composition of carbon black, said ethylene/α-olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with said α-olefin in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium: (i) Melt index: 0.01-100 g/10 min (ii) Density: 0.870-0.910 g/cm 3 (iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100° C. (iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.
Claim 2
Dependent Claim 116 words
An electrically-conductive resin composition consisting essentially of an ethylene/α-olefin copolymer, wherein said α-olefin is propylene, butene-1,4-methylpentene-1 or hexene-1, and 10 to 60 weight percent based on the total weight of the composition of carbon black, said ethylene/α-olefin copolymer having the following properties (i)-(iv) and being prepared by copolymerizing ethylene with said α-olefin in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium: (i) Melt index: 0.01-100 g/10 min (ii) Density: 0.870-0.910 g/cm 3 (iii) Maximum peak temperature (Tm) according to Differential Scanning Calorimetry (DSC): not lower than 100° C. (iv) Percent insoluble in boiling n-hexane: not less than 10 wt. %.

References Cited (Backward Citations)

US4026863A Cited
US4321162A Cited
US4421678A Cited
US4481131A Cited
US4526707A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-05-05 1989-11-04 1990-05-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-05-05 1993-11-04 1994-05-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-05-05 1997-11-04 1998-05-06 $7700.00 Window Closed / Lapsed

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