公开(公告)号：US20190071615A1

公开(公告)日：2019-03-07

申请号：US16119878

申请日：2018-08-31

Applicant: Evonik Oil Additives GmbH

Inventor： Katrin SCHÖLLER ,  Sarah LIPPERT ,  Wolfgang TSCHEPAT ,  Klaus SCHIMOSSEK

IPC: C10M145/14 ,  C08F220/18

Abstract: Polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700,000 g/mol or greater and number-average molecular weights of 130,000 g/mol or greater can be used to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions. These polymers can be obtained in a reaction mixture comprising monomers, a dilution oil, and an initiator. The resulting lubricant compositions can have improved kinematic viscosity and high temperature high shear performance.

公开(公告)号：US20190203147A1

公开(公告)日：2019-07-04

申请号：US16325208

申请日：2017-08-09

Applicant: EVONIK OIL ADDITIVES GMBH

Inventor： Stefan MAIER ,  Jürgen GEBHARDT ,  Katrin SCHÖLLER ,  Frank-Olaf MÄHLING

IPC: C10M145/14 ,  C08F220/14 ,  C10M169/04

Abstract: Polyalkyl(meth)acrylate (PAMA) polymers comprising a certain amount of hydroxyl-functionalized alkyl (meth)acrylates can be used for improving the demulsibility performance of high VI lubricating oil compositions. The lubricating oil compositions can be those which are based on apolar base oils, especially hydraulic fluid compositions. The polymers can be comprised in certain lubricating oil compositions.