ENGINE LUBRICATING OIL AND LUBRICATION

Japanese Patent JP3719821

B2

PROBLEM TO BE SOLVED: To obtain a lubricating oil which remarkably reduces the friction resistance inside an engine thereby to reduce the noise caused by engine rotation, to improve fuel consumption, and to extend the life of the engine and which itself has a long life by dispersing an effective amt. of a fine BN powder having a crystalline disordered layer structure in an oil.
SOLUTION: An effective amt. of a fine BN powder having a crystalline disordered layer structure and pref. having an average primary particle size of 0.5 μm or lower is dispersed in an oil, pref. a petroleum-derived oil, or a synthetic oil, or a mixture of these oils. Alternatively, a fine BN powder of a crystalline disordered layer structure and a fine BN powder of a hexagonal system, both having an average primary particle size of 1 μm or lower, pref. 0.5 μm or lower, are dispersed in the oil, the amt. of the powder of a crystalline disordered layer structure accounting for at least 50 wt.% of the whole powder dispersed. The amt. of the whole powder dispersed is pref. 0.02-50 wt.%.

Osamu Yamamoto

JP15917597A

November 24, 2005

June 02, 1997

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Osamu Yamamoto
Fuji Enterprise Co., Ltd.
Sanwa Yuka Kogyo Co., Ltd.

C10M169/04; C10M103/00; C10M111/00; C10M111/02; F01M11/00; C10N20/06; C10N30/06; C10N30/08; C10N40/02; C10N40/04; C10N40/25; (IPC1-7): C10M103/00; C10M111/00; C10M111/02; F01M11/00

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Kato Asamichi

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