Lubricant additive
AssigneeIdemitsu Kosan Co., Ltd.
InventorsHitoshi Hata, Hiromichi Seiki, Hisashi Machida
Life of this patent
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Abstract
A lubricant additive obtained by heating an acidic phosphate ester and/or a phosphite ester (A) represented by the general formula (I): 1 (wherein A represents H or OH, m is 0 or 1, when m is 0, A is OH, and when m is 1, A is H or OH, R1 and R2 each independently represent H, or a hydrocarbon group having 1 to 18 carbon atoms that may contain at least one O and S, both R1 and R2 are not simultaneously hydrogen atoms) and an imide-based dispersant containing boron (B) at a temperature of 120 to 150° C. for 5 hours or more, which can concurrently enhance excellent wear resistance, excellent scoring resistance and prolong surface fatigue life while keeping the balance of these properties at an optimum level.
Claims13
A lubricant additive obtained by heating at least one ester selected from acidic phosphate ester and a phosphite ester (A) represented by the general formula (I):
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- (wherein A represents a hydrogen atom or a hydroxyl group, m is 0 or 1, when m is 0 A is a hydroxyl group, and when m is 1, A is a hydrogen atom or a hydroxyl group, R1 and R2 each independently represent a hydrogen atom, or a hydrocarbon group having 1 to 18 carbon atoms that may contain at least one selected from an oxygen atom and a sulfur atom, R1 and R2 may be the same or different, but both R1 and R2 are not simultaneously hydrogen atoms)
- and an imide-based dispersant containing boron (B) at a temperature of 120 to 150° C. for 5 hours or more.
An additive for a traction drive fluid obtained by heating at least one ester selected from an acidic phosphate ester and a phosphite ester (A) represented by the general formula (I):
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- (wherein A represents a hydrogen atom or a hydroxyl group, m is 0 or 1, when m is 0, A is a hydroxyl group, and when m is 1, A is a hydrogen atom or a hydroxyl group, R1 and R2 each independently represent a hydrogen atom, or a hydrocarbon group having 1 to 18 carbon atoms that may contain at least one selected from an oxygen atom and a sulfur atom, R1 and R2 may be the same or different, but both R1 and R2 are not simultaneously hydrogen atoms)
- and an imide-based dispersant containing boron (B) at a temperature of 120 to 150° C. for 5 hours or more.
A traction drive fluid comprising a base oil, and 100 to 600 weight ppm of an additive expressed in terms of the amount of phosphorous obtained by heating a phosphate compound (A) and an imide-based dispersant containing boron (B) at 120 to 150° C. for 5 hours or more, wherein a weight ratio of boron to phosphorus (B/P) is 0.05 or more and a ratio of a total acid number (mgKOH/g) to a content of phosphorus (weight %) is 25 or more.
Dependencies are inferred from the claim text.