| 摘要 |
<p>A lubricating oil composition used in an internal combustion engine contains lubricating base oil; a disulfide compound as a component (A), a no-boron-containing ashless dispersant as a component (B), and a boron-containing ashless dispersant as a component (C). The disulfide compound as the component (A) is represented by the following formula (1) and/or the following formula (2). The no-boron-containing ashless dispersant as the component (B) has in its side chain: an alkyl group having a number average molecular weight of 500 to 3,000; or an alkenyl group having a number average molecular weight of 500 to 3,000. The boron-containing ashless dispersant as the component (C) has in its side chain: an alkyl group having a number average molecular weight of 500 to 4,000; or an alkenyl group having a number average molecular weight of 500 to 4,000.
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 OOC-A 1 -S-S-A 2 -COOR 2 €ƒ€ƒ€ƒ€ƒ€ƒ(1)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 7 -OOCR 9 R 10 -CR 11 (COOR 8 )-S-S-CR 16 (COOR 13 )-CR 14 R 15 -COOR 12 €ƒ€ƒ€ƒ€ƒ€ƒ(2)</p> |
