公开(公告)号：US12195691B2

公开(公告)日：2025-01-14

申请号：US18256375

申请日：2021-12-28

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Yukio Yoshida ,  Shota Kato ,  Hideto Kamimura

IPC: C10M145/14 ,  C08F220/18 ,  C08F220/20 ,  C08F230/02 ,  C10M153/02 ,  C10M169/04 ,  C10N20/04 ,  C10N30/06 ,  C10N30/08 ,  C10N40/02

Abstract: A lubricating oil additive composition that is suitable as a load bearing additive, and is excellent in wear resistance, extreme pressure property, and thermal stability, and a lubricating oil composition containing the lubricating oil additive composition. A lubricating oil additive composition containing a poly(meth)acrylate-based copolymer (X) containing a structural unit (a) derived from a particular alkyl (meth)acrylate (A), a structural unit (b) derived from a particular hydroxy group containing (meth)acrylate (B), and a structural unit (c) derived from a particular phosphorus-containing (meth)acrylate (C).