US5571859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic composition, resin composition and molded article of the resin composition
Assignee: Zeon Corp
•
Filing: 1994-10-27
•
Granted: 1996-11-05
•
Expires: 2014-10-27
Abstract
Abstract A resin composition comprising 100 parts by weight of a thermoplastic resin and 1 to 50 parts by weight of an antistatic composition consisting essentially of 100 parts by weight of carbon fibers having a length of 0.01 to 100 mm and 5 to 70 parts by weight of carbon fibers having a length of 1/2 to 1/100 of the first carbon fibers is molded to obtain a molded article having an even antistatic effect over the surface in which molded article the antistatic agent (carbon fibers) does not bleed to the exterior and the antistatic effect is maintained for a long time.
Inventors
- 👤 Hidenori Yukishige
- 👤 Yuji Koshima
- 👤 Hajime Tanisho
- 👤 Teiji Kohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:19
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
A resin composition which comprises 100 parts by weight of a thermoplastic resin and 1 to 50 parts by weight of an antistatic composition consisting essentially of (a) 100 parts by weight of carbon fibers having a length of 0.01 to 100 mm and (b) 5 to 70 parts by weight of carbon fibers having a length of 1/2 to 1/100 of the length of the carbon fibers (a).
Claim 2
Dependent Claim
69 words
A resin composition which comprises 100 parts by weight of a thermoplastic resin and 1 to 50 parts by weight of an antistatic composition consisting essentially of (a) 100 parts by weight of carbon fibers having a length of 0.01 to 100 mm and (b) 5 to 70 parts by weight of carbon fibers having a length of 1/2 to 1/100 of the length of the carbon fibers (a).
Claim 3
Dependent Claim
21 words
The resin composition according to claim 1, wherein the amount of the antistatic composition is 10 to 40 parts by weight.
Claim 4
Dependent Claim
21 words
The resin composition according to claim 1, wherein the amount of the antistatic composition is 15 to 30 parts by weight.
Claim 5
Dependent Claim
18 words
The resin composition according to claim 1, wherein the thermoplastic norbornene resin is free of a polar group.
Claim 6
Dependent Claim
29 words
The resin composition according to claim 1, wherein the thermoplastic norbornene resin has a polystyrene-reduced number average molecular weight of 10,000 to 200,000 as measured by gel permeation chromatography.
Claim 7
Dependent Claim
18 words
The resin composition according to claim 4, wherein the polystyrene-reduced number average molecular weight is 15,000 to 100,000.
Claim 8
Dependent Claim
18 words
The resin composition according to claim 4, wherein the polystyrene-reduced number average molecular weight is 20,000 to 50,000.
Claim 9
Dependent Claim
42 words
The resin composition according to claim 1, wherein the thermoplastic norbornene resin is a ring opening polymer of a norbornene monomer, its hydrogenated product, an addition polymer of a norbornene monomer or an addition copolymer of a norbornene monomer and an olefin.
Claim 10
Dependent Claim
30 words
The resin composition according to claim 7, wherein the norbornene monomer is at least one member selected from the group consisting of 2-norbornene, 5-methyl-2-norbornene, 5,5-dimethyl-2-norbornene, 1,4:5,8-dimethano-2,3-cyclopentadieno-1,2,3,4,4a,5,8,8a-octahydronaphthalene, dicyclopentadiene, 2,3-dihydrodicyclopentadiene, 1,4-methano-1,4,4a,4b,5,8,8a,9a-octahydrofluorene, 5,8-methano-2,3-cyclopentadieno-1,2,3,4,4a,5,8,8a-octahydronaphthalene.
Claim 11
Dependent Claim
20 words
The resin composition according to claim 1, wherein the thermoplastic resin has a degree of hydrogenation of 90% or more.
Claim 12
Dependent Claim
16 words
The resin composition according to claim 9, wherein the degree of hydrogenation is 95% or more.
Claim 13
Dependent Claim
16 words
The resin composition according to claim 9, wherein the degree of hydrogenation is 99% or more.
Claim 14
Dependent Claim
23 words
The resin composition according to claim 1, wherein the carbon fibers in the antistatic composition have a length of 0.5 to 10 mm.
Claim 15
Dependent Claim
31 words
The resin composition according to claim 1, wherein the carbon fibers (b) in the antistatic composition have a length of 1/4 to 1/10 of the length of the carbon fibers (a).
Claim 16
Dependent Claim
26 words
The resin composition according to claim 1, wherein the carbon fibers (a) and (b) in the antistatic composition have a diameter of 1 to 30 μm.
Claim 17
Dependent Claim
26 words
The resin composition according to claim 1, wherein the amount of the carbon fibers (b) in the antistatic composition is 15 to 50 parts by weight.
Claim 18
Dependent Claim
22 words
The resin composition according to claim 1, wherein the carbon fibers (a) and (b) in the antistatic composition are pitch carbon fibers.
References Cited (Backward Citations)
US5321071A
Cited
JPH05156100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |