Title:
Biodegradable grease composition for wind power generators
Document Type and Number:
Japanese Patent JP6348050
Kind Code:
B2
Abstract:
An object of the present invention is to provide a biodegradable grease composition which is excellent in fretting resistance, extreme pressure property, low temperature property, and biodegradability as well, and has a small effect to the environment even if released to a natural environment. The grease composition comprises a base oil composed of an ester oil having a kinematic viscosity at 40°C of 60 to 160 mm 2 /s and a thickener composed of a diurea compound obtained by allowing an amine mixture comprising a 4-8C alicyclic monoamine and a 20-24C aliphatic monoamine to react with a diisocyanate compound, wherein a content molar ratio of the alicyclic monoamine and the aliphatic monoamine in the amine mixture is 7:3 to 9:1, the content of the thickener in a total amount of the base oil and the thickener is 7 to 11 % by mass and a penetration is 265 to 340.
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Inventors:
Hiroki Iwamatsu
Kento Inada
Kento Inada
Application Number:
JP2014225309A
Publication Date:
June 27, 2018
Filing Date:
November 05, 2014
Export Citation:
Assignee:
Nippon Grease Co., Ltd.
International Classes:
C10M169/02
Domestic Patent References:
| JP2008239687A | ||||
| JP2008208240A | ||||
| JP2012172066A | ||||
| JP2008111514A |
Foreign References:
| WO2011046201A1 | ||||
| WO2012036076A1 |
Attorney, Agent or Firm:
Asahina Patent Office
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