Title:
LUBRICATING OIL OR LUBRICATING OIL COMPOSITION AND FUEL OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/1998/033872
Kind Code:
A1
Abstract:
A lubricating oil comprising a random copolymer of an $g(a)-olefin/aromatic vinyl compound, wherein the copolymer has a viscosity falling within a specific range and comprises ethylene, an aromatic vinyl compound, and optionally an $g(a)-olefin. The lubricating oil possesses excellent viscosity properties, thermal stability, oxidation stability, abrasion resistance, and compatibility with lubricating oil additives. The random copolymer having a different viscosity range is useful as a viscosity index improver and a compatibilizing agent for a lubricating oil. The invention also provides a lubricating oil composition comprising a base oil and the viscosity index improver or the compatibilizing agent. The invention further provides a fuel oil composition comprising a fuel oil fluidity improver based on the above random copolymer having a different viscosity range and a middle fraction fuel oil having a boiling point of 150 to 400 �C. The fuel oil composition prevents an increase in viscosity of the middle fraction fuel oil, lowers the clogging point and the flow point in a low-temperature filter, and inhibits the abrasion of a fuel jet nozzle.
Inventors:
KANESHIGE RYOUSUKE (JP)
HIRANO HIDEKI (JP)
TANAKA MASAHIDE (JP)
MORIZONO KENICHI (JP)
OKADA KEIJI (JP)
HIRANO HIDEKI (JP)
TANAKA MASAHIDE (JP)
MORIZONO KENICHI (JP)
OKADA KEIJI (JP)
Application Number:
PCT/JP1998/000212
Publication Date:
August 06, 1998
Filing Date:
January 21, 1998
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
KANESHIGE RYOUSUKE (JP)
HIRANO HIDEKI (JP)
TANAKA MASAHIDE (JP)
MORIZONO KENICHI (JP)
OKADA KEIJI (JP)
KANESHIGE RYOUSUKE (JP)
HIRANO HIDEKI (JP)
TANAKA MASAHIDE (JP)
MORIZONO KENICHI (JP)
OKADA KEIJI (JP)
International Classes:
C08L23/08; C10L1/16; C10L10/04; C10M107/12; C10M143/10; C08L91/00; (IPC1-7): C10M107/12; C10M143/10; C10L1/16
Foreign References:
| JPS5770195A | 1982-04-30 | |||
| JP4501582A | ||||
| JPH0859765A | 1996-03-05 | |||
| JPS5010322B1 | 1975-04-21 | |||
| JPH05504987A | 1993-07-29 |
Other References:
See also references of EP 0902081A4
Attorney, Agent or Firm:
Suzuki, Shunichiro (Gotanda Yamazaki Building 6F 13-6,
Nishigotanda 7-chom, Shinagawa-ku Tokyo 141, JP)
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