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Title:
VISCOSITY MODIFIER FOR LUBRICATING OILS, ADDITIVE COMPOSITION FOR LUBRICATING OILS, AND LUBRICATING OIL COMPOSITIONS
Document Type and Number:
WIPO Patent Application WO/2017/082182
Kind Code:
A1
Abstract:
[Problem] To provide a viscosity modifier for lubricating oils and an additive composition for lubricating oils for obtaining a lubricating oil composition having exceptional storage stability at low temperatures and exceptional viscosity characteristics at low temperatures. [Solution] This viscosity modifier for lubricating oils includes a resin (α), wherein the resin (α) satisfies specific requirements and includes a grafted olefin polymer [R1] that is configured from a main chain and a side chain and that satisfies the following requirements (i) and (ii). (i) The main chain comprises a copolymer of ethylene and at least one α-olefin selected from C3-12 α-olefins, and structural units derived from the ethylene are within the range of 74-86 mol%. (ii) The side chain comprises a copolymer of ethylene and at least one α-olefin selected from C3-12 α-olefins, and structural units derived from the ethylene are within the range of 30-65 mol%.

Inventors:
HAYAKAWA AKIO (JP)
YANAGIMOTO YASUSHI (JP)
YAMAMOTO ATSUSHI (JP)
NAKAMURA TATSUYA (JP)
MATSUGI TOMOAKI (JP)
OKADA KEIJI (JP)
Application Number:
PCT/JP2016/082911
Publication Date:
May 18, 2017
Filing Date:
November 07, 2016
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C10M143/00; C08F255/04; C10M143/04; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N40/04; C10N40/25; C10N40/26; C10N50/10
Domestic Patent References:
WO2009101936A12009-08-20
WO2003038017A12003-05-08
WO1998033872A11998-08-06
WO2008047878A12008-04-24
WO2000060032A12000-10-12
WO2000034420A12000-06-15
WO2008047878A12008-04-24
WO2001027124A12001-04-19
WO2004029062A12004-04-08
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WO2000060032A12000-10-12
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Other References:
"Polymer Analysis Handbook", 12 January 1995, KINOKUNIYA CO., LTD.
RESCONI, L., JACS, vol. 114, 1992, pages 1025 - 1032
See also references of EP 3375849A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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