Antioxidant composition and lubricating oil composition containing same

摘要

Provided is an antioxidant composition, including: a compound (A) represented by the following general formula (1); and an amine-based antioxidant (B) and/or a phenol-based antioxidant (C) other than the compound (A):;
(wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3.).

主权项

1. An antioxidant composition for a lubricating oil composition, consisting of:
a compound (A) represented by the following formula (1); at least 1 mass % of an amine-based antioxidant (B) selected from the following formulas (2) and (3) based on a total of components (A), (B) and (C); and at least 1 mass % of a phenol-based antioxidant (C) represented by the following formula (4) based on a total of components (A), (B) and (C), wherein a ratio of the compound (A) to the amine-based antioxidant (B) and the phenol-based antioxidant (C) is 70/30 to 95/5 in terms of weight ratio: wherein R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and n represents a number from 1 to 3; wherein R1 and R2 each independently represents a hydrogen atom or an aliphatic hydrocarbon group having 1 to 18 carbon atoms; wherein R3 and R4 each independently represents a hydrogen atom or an aliphatic hydrocarbon group having 1 to 18 carbon atoms; wherein R5 and R6 each independently represents any one of a hydrogen atom and an alkyl group having 1 to 4 carbon atoms, R7 represents a hydrocarbon group having 1 to 20 carbon atoms which may contain an ester group, and m represents a number of 1 to 4, provided that any one of R5 and R6 must be an alkyl group having 1 to 4 carbon atoms.