公开(公告)号：US20210147759A1

公开(公告)日：2021-05-20

申请号：US16622474

申请日：2018-07-19

Applicant: BASF SE

Inventor： Szilard CSIHONY ,  Anja THOMAS ,  Kevin J. DESANTIS ,  Philippe RABBAT ,  Andrea MISSKE ,  Johannes BARTH ,  Meik RANFT ,  Peter MUELLER ,  Wolfgang GRABARSE ,  Christoph FLECKENSTEIN

IPC: C10M145/14 ,  C10M143/06 ,  C10M169/04

Abstract: The present invention is directed to the use of poly(polyisobutylenemethacrylate) as viscosity index improving component in lubricating oil compositions. The invention is further related to lubricating oil compositions comprising poly(polyisobutylenemethacrylate) with enhanced shear stability.

公开(公告)号：US20240174601A1

公开(公告)日：2024-05-30

申请号：US18282281

申请日：2022-03-08

Applicant: BASF SE

Inventor： Yang YANG ,  Xiao Yu SUN ,  Dong LIANG ,  Stefan BOKERN ,  Johannes BARTH ,  Peter DEGLMANN

IPC: C07C263/18 ,  C07C265/12 ,  C07D207/12 ,  C07D233/02 ,  C07D275/03

CPC classification number: C07C263/18 ,  C07C265/12 ,  C07D207/12 ,  C07D233/02 ,  C07D275/03

Abstract: This disclosure relates to a composition comprising (a) 4,4′-methylene diphenyl diisocyanate (4,4′-MDI), and (b) at least one heterocyclic compound comprising as ring moiety at least one structure of formula (I) as defined in the description. The heterocyclic compound can suppress the formation of 4,4′-MDI dimer and thus prevent the formation of insoluble solids and extend the shelf life of 4,4′-MDI.