公开(公告)号：US11773343B2

公开(公告)日：2023-10-03

申请号：US17528986

申请日：2021-11-17

Applicant: AFTON Chemical Corporation

Inventor： Kenneth Garelick ,  Todd Dvorak ,  Mark Devlin

IPC: C10M137/10 ,  C10M143/02 ,  C10M143/04 ,  C10M169/04 ,  C10M125/22 ,  C10N40/25 ,  C10N10/04 ,  C10N20/04 ,  C10N20/02 ,  C10N30/02 ,  C10N30/04 ,  C10N30/00 ,  C10N30/08

CPC classification number: C10M137/10 ,  C10M125/22 ,  C10M143/02 ,  C10M143/04 ,  C10M169/04 ,  C10M2201/06 ,  C10M2205/022 ,  C10M2205/024 ,  C10M2223/045 ,  C10N2010/04 ,  C10N2020/02 ,  C10N2020/04 ,  C10N2030/02 ,  C10N2030/04 ,  C10N2030/08 ,  C10N2030/54 ,  C10N2030/68 ,  C10N2040/25

Abstract: The present disclosure relates to methods of improving viscosity shear stability of a lubricating oil and lubricating oil composition comprising:



a base oil of lubricating viscosity;
an amount of one or more zinc dialkyl dithiophosphate compound(s);

wherein the lubricating oil composition has one or both of the following ratios:

a) a ratio of KV40° C.fresh to a weight % of zinc contributed by the one or more zinc dialkyl dithiophosphate compound(s) based on a total weight of the lubricating oil composition, of greater than 510, wherein KV40° C.fresh is the kinematic viscosity of the fresh lubricating oil composition at 40° C.; and
b) a ratio of KV40° C.fresh to a weight % of phosphorus contributed by the one or more zinc dialkyl dithiophosphate compound(s) based on a total weight of the lubricating oil composition, of greater than 560, wherein KV40° C.fresh is the kinematic viscosity of the fresh lubricating oil composition at 40° C.