EP0578245A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing a resin compound
Assignee: Mitsubishi Chemical Corp
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Filing: 1993-07-08
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Granted: —
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Expires: 2013-07-08
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 c/o Mitsubishi Petrochem.Co. Ltd Okamura
- 👤 Tetsuo c/o Mitsubishi Petrochem. Co. Ltd. Konno
- 👤 Kouichi c/o Mitsubishi Petro. Co. Ltd. Sagisaka
- 👤 Masakazu c/o Mitsubishi Petrochem. Co.Ltd. Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:51
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
199 words
A process for producing a resin compound comprising melt-kneading (a) from 40 to 90 % by weight of polyethylene having a density of not less than 0.92 g/cm³ 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) not more than 20 % by weight of talc, based on the total amount of (a), (b) and (c), to prepare (I) a mixture 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) not more than 150 parts by weight of at least one fibrous reinforcement selected from (1) carbon fiber having an average 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
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 3
Dependent Claim
60 words
A process as claimed in Claim 1, wherein said mixture (I) contains talc in an amount of from 5 to 20 parts by weight per 100 parts by weight of said mixture (I), 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 4
Dependent Claim
69 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
30 words
A process as claimed in Claim 1, wherein said polyethylene has a density of from 0.945 to 0.98 g/cm³ 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
28 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 m²/g.
Claim 8
Dependent Claim
37 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, AS resin, ABS resin, polyarylate, LCP, and polyether-imide.
References Cited (Backward Citations)
No citation records indexed.
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