グリース組成物の製造方法

Japanese Patent JP4567114

B2

PROBLEM TO BE SOLVED: To obtain a grease composition which can decrease frictional power even under low-speed and low-load conditions by compounding a base oil containing at least a specified amount of a synthetic ester oil with a thickening agent containing lithium soap fibers having a specified length or longer. SOLUTION: This composition contains a base oil which contains at least 50 wt.% synthetic ester oil (e.g. a pentaerythritol ester) and has a kinematic viscosity (at 40 deg.C) of 5-400 mm2/s and a thickening agent which contains lithium soap (e.g. lithium hydroxystearate) fibers having lengths of 3.0 μm, preferably in an amount of 2-50 wt.% of the composition, The composition is prepared e.g. by adding a lithium soap to a base oil containing a synthetic ester oil, heating the base oil to 235 deg.C to dissolve the soap in the oil, slowly cooling the resultant solution to room temperature to form a short-fiber soap having a length of 1-2 μm and keeping the soap at a temperature (180-190 deg.C) not completely redissolving the soap under stirring to cause the fiber length to grow.

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JP2005232433	GREASE COMPOSITION FOR ELECTRICAL CONTACT

Atsushi Shibayama
Hiroshi Kimura

JP14355299A

October 20, 2010

May 24, 1999

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Kyodo Yushi Co., Ltd.

C10M169/02; C10M177/00; C10M105/32; C10M117/02; C10N10/02; C10N20/06; C10N30/02; C10N30/08; C10N40/06; C10N50/10; C10N70/00

JP8143884A
JP9021424A
JP8209176A

トライボロジー会議予稿集 東京,1993年,p.563-566
トライボロジー会議予稿集 北九州,1996年,p.140-142
トライボロジスト,1997年,42(6),p.50-57

Minoru Nakamura
Fumiaki Otsuka
Nobuo Ogawa

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