Patent US5373046A successfully refreshed from Google Patents.
US5373046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a resin compound
Assignee: Mitsubishi Chemical Corp
•
Filing: 1993-07-09
•
Granted: 1994-12-13
•
Expires: 2013-07-09
Abstract
Abstract A process for producing a resin compound applicable to precise electronic parts, especially sliding member from thermoplastic engineering plastics is disclosed, comprising compounding (I) a carbon masterbatch comprising polyethylene having a density of not less than 0.92 g/cm3 and an MI of from 0.1 to 30 g/10 min, conductive carbon black, and talc and (II) a thermoplastic engineering plastic. The carbon black is satisfactorily dispersed to impart satisfactory heat conductivity to a molded article to thereby providing a sliding member with little wear and long durability.
Inventors
- 👤 Michiya Okamura
- 👤 Tetsuo Konno
- 👤 Kouichi Sagisaka
- 👤 Masakazu Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:30
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08K; C08K13/00; C08K13/04; C08K3/00; C08K3/02; C08K3/04; C08K3/34; C08K7/00; C08K7/02; C08K7/04; C08L101/00; C08L67/00; C08L67/02; C08L69/00; C08L77/00; C08L77/06; C08L79/00; C08L79/04; C08L79/08; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C08J2423/00; C08K7/06; C08K7/14; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
216 words
A process for producing a resin compound comprising: melt-kneading (a) at least 40% by weight of polyethylene having a density of not less than 0.92 g/cm 3 and a melt index of from 0.1 to 30 g/10 min, (b) from 10 to 40% by weight of conductive carbon black, and (c) from 5% to 20% by weight of talc, the percent amount of each component based on the total amount of (a), (b) and (c), to prepare a mixture (I) having a melt index of from 0.1 to 40 g/10 min, compounding (I) from 3 to 150 parts by weight of the resulting mixture, (II) 100 parts by weight of a thermoplastic engineering plastic and (III) from 5 to 150 parts by weight, per 100 parts by weight of said engineering plastic, of at least one fibrous reinforcement selected from the group consisting of (1) carbon fiber having an average of diameter of from 3 to 20 μm and an average length of from 0.03 to 60 mm, (2) glass fiber having an average diameter of from 3 to 15 μm and an average length of from 0.05 to 10 mm, and (3) potassium titanate fiber having an average diameter of from 0.1 to 3 μm and an average length of from 5 to 120 μm.
Claim 2
Dependent Claim
216 words
A process for producing a resin compound comprising: melt-kneading (a) at least 40% by weight of polyethylene having a density of not less than 0.92 g/cm 3 and a melt index of from 0.1 to 30 g/10 min, (b) from 10 to 40% by weight of conductive carbon black, and (c) from 5% to 20% by weight of talc, the percent amount of each component based on the total amount of (a), (b) and (c), to prepare a mixture (I) having a melt index of from 0.1 to 40 g/10 min, compounding (I) from 3 to 150 parts by weight of the resulting mixture, (II) 100 parts by weight of a thermoplastic engineering plastic and (III) from 5 to 150 parts by weight, per 100 parts by weight of said engineering plastic, of at least one fibrous reinforcement selected from the group consisting of (1) carbon fiber having an average of diameter of from 3 to 20 μm and an average length of from 0.03 to 60 mm, (2) glass fiber having an average diameter of from 3 to 15 μm and an average length of from 0.05 to 10 mm, and (3) potassium titanate fiber having an average diameter of from 0.1 to 3 μm and an average length of from 5 to 120 μm.
Claim 3
Dependent Claim
34 words
A process as claimed in claim 1, wherein said fibrous reinforcement is compounded in an amount of from 5 to 150 parts by weight per 100 parts by weight of the thermoplastic engineering plastic.
Claim 4
Dependent Claim
66 words
A process as claimed in claim 1, wherein said mixture (I) comprises from 50 to 80% by weight of polyethylene, from 15 to 35% by weight of conductive carbon black, and from 5 to 15% by weight of talc, and said fibrous reinforcement is compounded in an amount of from 5 to 150 parts by weight per 100 parts by weight of the thermoplastic engineering plastic.
Claim 5
Dependent Claim
31 words
A process as claimed in claim 1, wherein said polyethylene has a density of from 0.945 to 0.98 g/cm 3 and a melt index of from 5 to 20 g/10 min.
Claim 6
Dependent Claim
19 words
A process as claimed in claim 1, wherein said conductive carbon black is acetylene black or oil furnace black.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 1, wherein said conductive carbon black is oil furnace black having a BET specific surface area of not less than 850 m 2 /g.
Claim 8
Dependent Claim
40 words
A process as claimed in claim 1, said engineering plastic is at least one of polyamide, saturated polyester, polyacetal, polycarbonate, polyester sulfone, polyphenylene oxide, polyphenylene sulfide, polyether ether ketone, acrylonitrile-styrene resin, acrylonitrile-butadiene-styrene resin, polyarylate, a liquid crystalline polymer, and polyether-imide.
References Cited (Backward Citations)
US3516961A
Cited
US3591526A
Cited
US3668172A
Cited
DE3034747A1
Cited
US4510078A
Cited
US4476274A
Cited
JPS6065064A
Cited
US4670508A
Cited
US4929388A
Cited
DE3510959A1
Cited
US4699944A
Cited
JPS62100553A
Cited
US4857232A
Cited
US5098610A
Cited
US5212222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |