公开(公告)号：US20190203150A1

公开(公告)日：2019-07-04

申请号：US16215916

申请日：2018-12-11

Applicant: ExxonMobil Research and Engineering Company

Inventor： Sarvesh K. AGRAWAL ,  James E. SPAGNOLI ,  David A. BLAIN

IPC: C10M169/04 ,  C10M101/02 ,  C10M145/14

Abstract: Grease compositions are provided that can have one or more unexpectedly beneficial low temperature properties even though the grease compositions are formed from lower value components that traditional low temperature greases. The unexpectedly beneficial low temperature properties can be achieved in part by grease compositions that include a naphthenic base stock having a viscosity index of roughly 120 or less and/or a pour point of −20° C. or more while having a naphthenes content of 60 wt % or more. In some aspects, the naphthenic base stock can have an aromatics content of 20 wt % or less.

公开(公告)号：US20190062669A1

公开(公告)日：2019-02-28

申请号：US16010704

申请日：2018-06-18

Applicant: ExxonMobil Research and Engineering Company

Inventor： Nabila BRABEZ ,  John K. GRAHAM ,  James E. SPAGNOLI ,  Raymond C. ENNIS ,  John ZACHARKOW

IPC: C10M169/06 ,  C10M105/06 ,  C10M107/02 ,  C10M111/04 ,  C10M121/00 ,  C10M135/18 ,  C10M137/10 ,  C10M143/02 ,  C10M143/04 ,  C10M161/00

Abstract: The present disclosure provides a lithium complex grease with high-temperature resistivity and a method of making the same. The lithium complex grease includes: a lithium complex thickener, a friction modifier, a polymer or copolymer, and at least one synthetic base oil with alkylated naphthalene. The lithium complex grease can be substantially free of polytetrafluoroethylene. Furthermore, the lithium complex grease can have a median failure rate with via ball bearing test (e.g., using the FE9 grease life test method of DIN 51 821) performed at 160° C. of no less than 100 hours.

公开(公告)号：US20190016984A1

公开(公告)日：2019-01-17

申请号：US16029873

申请日：2018-07-09

Applicant: ExxonMobil Research and Engineering Company

Inventor： Craig J. EMETT ,  John K. GRAHAM ,  John ZACHARKOW ,  Nabila BRABEZ ,  James E. SPAGNOLI

IPC: C10M117/04 ,  C10M169/02 ,  C10M177/00 ,  C07C51/41 ,  C07C51/44

Abstract: This disclosure relates to a continuous process for preparing a grease thickener product in which operating conditions of the continuous process can be varied to obtain desired grease product properties. The process includes: (a) introducing a C3 to C30 hydroxy fatty acid or a C3 to C30 hydroxy fatty acid ester, and a metal base into a reaction zone; (b) operating the reaction zone at a temperature between 100° C. and 240° C. to react the C3 to C30 hydroxy fatty acid or the C3 to C30 hydroxy fatty acid ester, and the metal base, to produce a grease thickener product; (c) introducing the grease thickener product of step (b) into a flash chamber zone; and (d) operating the flash chamber zone at a temperature sufficient to remove volatiles from the grease thickener product of step (b). The continuous process conditions afford a production throughput of grease thickener product of greater than 8,000 pounds per hour.

公开(公告)号：US20190382680A1

公开(公告)日：2019-12-19

申请号：US16232610

申请日：2018-12-26

Applicant: ExxonMobil Research and Engineering Company

Inventor： John K. GRAHAM ,  Nabila BRABEZ ,  John ZACHARKOW ,  Raymond C. ENNIS ,  James E. SPAGNOLI

IPC: C10M169/00 ,  C10M105/06 ,  C10M107/02 ,  C10M111/04 ,  C10M117/04 ,  C10M117/06 ,  C10M135/18 ,  C10M137/10 ,  C10M143/02 ,  C10M143/04 ,  C10M161/00

Abstract: The present disclosure provides a lithium complex grease with high-temperature resistivity and a method of using the same. The lithium complex grease includes: a lithium complex thickener, a friction modifier, a polymer or copolymer, and at least one synthetic base oil with alkylated naphthalene. The lithium complex grease can be substantially free of polytetrafluoroethylene. Furthermore, the lithium complex grease provides a median failure rate via a ball bearing test (e.g., using the FE9 grease life test method of DIN 51 821) performed at 160° C. of no less than 100 hours.

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.