公开(公告)号：US20190203149A1

公开(公告)日：2019-07-04

申请号：US16217560

申请日：2018-12-12

Applicant: ExxonMobil Research and Engineering Company

Inventor： Sarvesh K. AGRAWAL ,  James E. SPAGNOLI ,  Chengrong WANG

IPC: C10M169/00 ,  C10M149/18 ,  C10M117/00 ,  C10M113/10 ,  C10M139/00 ,  C10M135/36 ,  C10M133/00 ,  C10M137/10 ,  C10M129/95 ,  C10M145/02 ,  C10M161/00

Abstract: The present disclosure provides a grease composition with improved water resistance and mechanical stability at high-temperatures, including: at least one base oil; a water insoluble thickener; and a low molecular weight thixotropic polyamide composition having molecular weight distribution characteristics meeting the requirement described by the relationship: ( A + D ) ( B + C ) ≥ 0.05 where A=the % mass of the polyamide composition with a molecular weight greater than 1700 AMU; B=the % mass of the polyamide composition with a molecular weight between 1100 AMU and 1300 AMU; C=the % mass of the polyamide composition with a molecular weight between 700 AMU and 1000 AMU; and D=the % mass of the polyamide composition with a molecular weight of 600 AMU or lower (determined by GPC). The grease composition of the present disclosure provides a less than 50 penetration point change as determined by ASTM-D7342, a less than 10 mg weight loss as determined by ASTM-D4170, or both.