公开(公告)号：US20250109349A1

公开(公告)日：2025-04-03

申请号：US18644915

申请日：2024-04-24

Applicant: Infineum International Limited

Inventor： Nga Nguyen ,  Peter M. Wright ,  Thomas Featherstone ,  Andrew J. Rainsford ,  Ewan K. Galbraith ,  Kunihiro Kouno ,  Akihiro Kodaka ,  Youhei Inagaki ,  Xiabo Shen ,  Jun Xu ,  Nigel Male

IPC: C10M133/00 ,  C10M101/00 ,  C10M145/14 ,  C10N10/04 ,  C10N10/12 ,  C10N30/02

Abstract: This invention relates to a lubricating oil composition comprising or resulting from the admixing of: (i) at least 50 mass %, based upon the weight of the lubricating oil composition, of base oil, (ii) at least one capped dispersant having number average molecular weight (Mn) of less than 1600 g/mol, (iii) at least one magnesium containing detergent, (iv) at least one calcium containing detergent, (v) at least one copolymer viscosity modifier that has: 1) a ratio of relative KV140/relative KV20 of 1.9 or more; 2) a ratio of relative KV100/relative KV70 or 1.30 or more; and 3) a viscosity index (ASTM 2270D) of 320 or more, when 1), 2) and 3) are measured on blend, having a KV100 of about 8 cSt, of the copolymer viscosity modifier and a group III base oil having a KV100 (ASTM D445) of about 4 cSt and a viscosity index (ASTM D2270) of about 120.