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US 12,227,471 B2Granted
Polyalkylene glycol-based compound
AssigneeIdemitsu Kosan Co., Ltd.
InventorsSo Nakajima, Yukio Yoshida
Life of this patent
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Abstract
A polyalkylene glycol-based compound may have formula (1): wherein R1 is a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms; R2 is a monovalent aromatic hydrocarbon group having 6 to 42 carbon atoms or a hydrogen atom; R3 is a divalent hydrocarbon group having 2 to 4 carbon atoms; and m is a number in a range of from 1 to 40.
Claims20
A lubricating oil composition, comprising a polyalkylene glycol-based compound represented by the formula (1):
- wherein R1 represents a monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms in one or more rings;
- R2 represents a monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms in one or more rings or a hydrogen atom;
- R3 represents a divalent hydrocarbon group having 2 to 4 carbon atoms;
- and m is a number of 1 to 40,
- wherein the monovalent aromatic hydrocarbon group is represented by the formula (2):
- wherein (t+a)≤5,
- t is an integer of 0 to 5,
- a is an integer of 0 to 2, provided that at least one a is an integer of 1 or 2,
- * represents a bonding position to the oxygen atom in the formula (1),
- R is each independently a methyl group, an ethyl group or a vinyl group, and
- A is each independently a group represented by the formula (8),
- wherein z is 1,
- L1 is a vinylene group,
- Ar1 is represented by the formula (2), and
- in the formula (8), when Ar1 is the formula (2), R, A and t have the meaning above, and * represents a bonding position to L1 in the formula (8).
12 more elements
Dependencies are inferred from the claim text.