Lubrication oil composition
AssigneeNippon Oil Co., Ltd.
InventorsMineo Kagaya, Mitsuaki Ishimaru, Hiroaki Ishii
Life of this patent
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Abstract
The lubricating oil composition of the present invention comprising an ester mixture as the main ingredient consisting of (A) 60-95% by weight of an ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms, and (B) 5-40% by weight of a complex ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms and also with a dibasic acid having 20-50 carbon atoms, the composition having excellent performances such as biodegradability, high-temperature engine cleanliness, lubricity and piston seizure preventiveness which are conductive to environmental protection.
Claims8
A method of lubricating a two-cycle engine which consists of
- a) mixing
- (A) 60-95% by weight of an ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms with
- (B) 5-40% by weight of a complex ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms and also with a dibasic acid having 20-50 carbon atoms to obtain a mixture and
- b) applying said mixture to said two-cycle engine.
A method of lubricating a two-cycle engine which consists of
- a) mixing
- (A) 60-95% by weight of an ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms with
- (B) 5-40% by weight of a complex ester of a hindered alcohol with a straight-chain saturated fatty acid having 8-12 carbon atoms and also with a dibasic acid having 20-50 carbon atoms, and with
- (C) up to 30 parts by weight of a hydrocarbon based solvent and/or a lubricating based oil and
- b) applying said mixture to said two-cycle engine.
Dependencies are inferred from the claim text.