Lubricant base oil and lubricating oil composition
AssigneeNof Corporation
InventorsHideki KAWAMOTO, Shunsuke MONJIYAMA
Life of this patent
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Abstract
A lubricant base oil composed of an ester. The ester includes a component (A) derived from trimethylolpropane in a molar percentage Amol% of 25 to 42 mol %; components (B) derived from monovalent straight-chain saturated fatty acids each having a carbon number of 8 to 12 in a molar percentage Bmol% of 33 to 55 mol %: and a component (C) derived from adipic acid in a molar ratio Cmol% of 12 to 34 mol %. The components (B) include lauric acid in a molar percentage of 5 to 50 mol %, and (BCOOH+CCOOH)/AOH is 0.90 to 1.02. AOH represents a hydroxyl equivalent of the component (A), BCOOH represents a carboxyl group equivalent of the components (B); and CCOOH represents a carboxyl group equivalent of the component (C).
Claims2
A lubricant base oil comprising an ester, said ester comprising:
- a component (A) derived from trimethylolpropane in a molar percentage Amol% of 25 to 42 mol %;
- components (B) derived from monovalent straight-chain saturated fatty acids each having a carbon number of 8 to 12 in a molar percentage Bmol% of 33 to 55 mol %:
- and
- a component (C) derived from adipic acid in a molar ratio Cmol% of 12 to 34 mol %,
- wherein said components (B) derived from said monovalent straight-chain saturated fatty acids each having a carbon number of 8 to 12 comprise a component derived from lauric acid in a molar percentage of 5 to 50 mol %, and
- wherein (BCOOH+CCOOH)/A OH is 0.90 to 1.02.
- (AOH represents a hydroxyl equivalent of said component (A) derived from trimethylolpropane,
- BCOOH represents a carboxyl group equivalent of said components (B) derived from said monovalent straight-chain saturated fatty acids each having a carbon number of 8 to 12, and
- CCOOH represents a carboxyl group equivalent of said component (C) derived from adipic acid.)
Dependencies are inferred from the claim text.