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US 2023/0272297 A1Published application
Lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsAkio KOJIMA, Yukio YOSHIDA, Kenichi OGATA, Shota KATO, Keiichi NARITA
Life of this patent
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Abstract
A lubricating oil composition may have a high flash point, a low pour point, and excellent electrical insulation, while having excellent cooling performance. Such a lubricating oil composition may include a base oil (A), wherein the base oil (A) includes at least one synthetic oil (A1) selected from a polyalkylene glycol having a specific degree of polymerization and a polyvinyl ether having a specific degree of polymerization.
Claims12
A lubricating oil composition, comprising a base oil (A), wherein:
- the base oil (A) comprises at least one synthetic oil (A1) selected from the group consisting of a polyalkylene glycol having a structural unit represented by the following general formula (1) and a polyvinyl ether having a structural unit represented by the following general formula (2):
- wherein R1 and R2 each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 18 carbon atoms, R3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, n represents an integer of 3 to 5,
- wherein R5, R6, and R7 each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 8 carbon atoms, R8 represents a divalent hydrocarbon group having 2 to 10 carbon atoms, R9 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, m represents 3 or 4, q represents an integer of 0 to 10.
Dependencies are inferred from the claim text.