Patent ID: 11932822
Assignee: IDEMITSU KOSAN CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A lubricating oil composition, comprising:
(A) a base oil;
(B) an imide compound;
(C) a calcium-based detergent;
(D) a polymer component having a mass average molecular weight (Mw) in a range of from 10,000 to 50,000, and comprises a polyolefin and/or a polymethacrylate; and
(E) a zinc dithiophosphate,
wherein the imide compound (B) comprises non-boron-modified succinic acid imide compound (B1) comprising a succinic acid monoimide of formula (b-1) and/or a succinic acid bisimide of formula (b-2):, wherein
RA, RA1, and RA2 are each independently an alkenyl group having a mass average molecular weight (Mw) in a range of from 500 to 4,000,
RB, RB1, and RB2 are each independently an alkylene group having 2 to 5 carbon atoms,
RC is an alkyl group having 1 to 10 carbon atoms or a group represented by —(AO)n-H, A is an alkylene group having 2 to 4 carbon atoms, and n being an integer in a range of from 1 to 10,
x1 is an integer in a range of from 1 to 10, and
x2 is an integer in a range of from 1 to 10.