润滑科技信息平台

专利摘要

润滑脂包括全氟聚醚油共聚物和与该共聚物混合的增稠剂。该共聚物包含约 20 mol% 至约 80 mol% 的 –CF2CF2O- 单元、约 20 mol% 至约 80 mol% 的 –CF(CF3)CF2O- 单元和约 0 mol% 至约 45 mol% 的一种或更多额外的全氟亚烷氧基单元。共聚物的粘度指数在约120至约220的范围内。共聚物的平均TFEO运行长度小于约6。形成润滑脂的方法包括将全氟聚醚油共聚物与增稠剂混合以形成润滑脂。 ......

基本信息

专利类型:
发明专利
申请/专利号:
EP2022812917
申请日期:
2022-10-24
专利申请人:
分类号:
["C10M107/38","C10M169/02"]
发明/设计人:
SHTAROV, ALEXANDER BORISOVICH ， HACARLIOGLU, PELIN ， HOWELL, JON LEE
权利要求: CLAIMSWhat is claimed is:1 . A grease comprising: a perfluoropolyether oil copolymer comprising: about 20 mol% to about 80 mol% of -CF2CF2O- units; about 20 mol% to about 80 mol% of -CF(CF3)CF2O- units; and about 0 mol% to about 45 mol% of one or more additional perfluoroalkyleneoxy units; said copolymer having a viscosity index in the range of about 120 to about 220; and said copolymer having an average TFEO run length of less than about 6; and a thickener mixed with the copolymer.2. The grease of claim 1 , wherein the copolymer has a number average molecular weight in the range of about 1 ,500 to about 20,000 Da.3. The grease of claim 2, wherein the number average molecular weight is in the range about 3,500 to about 13,000 Da.4 The grease of any of the preceding claims, wherein the one or more additional perfluoroalkyleneoxy units comprises -CF2CF2CF2O- units.5. The grease of any of the preceding claims, wherein the ISO viscosity grade of the copolymer is above about 25.6. The grease of any of the preceding claims, wherein the viscosity index is in the range of about 150 to about 220.7. The grease of any of the preceding claims, wherein the average TFEO run length is less than about 4.5.8. The grease of any of the preceding claims, wherein the copolymer has a pour point of about -20°C or less.The grease of claim 8, wherein the pour point is about -50°C or less. The grease of any of the preceding claims, wherein the thickener is selected from the group consisting of polytetrafluoroethylene, talc, silica, fluorinated ethylene propylene, perfluoroalkoxy alkane, clay, graphite, surface-treated silica, boron nitride, calcium carbonate, and combinations thereof. The grease of any of the preceding claims, wherein the thickener is present in the grease in an amount in the range of about 1 % to about 50% by weight of the grease. The grease of any of the preceding claims, wherein the thickener comprises particles having a surface area in the range of about 2 to about 35 m2/g. The grease of any of the preceding claims, wherein the thickener comprises particles having an average particle size in the range of 30 nm to 300 nm. The grease of any of the preceding claims, wherein the grease has a starting torque at -40°C of less than 1100 g-cm. The grease of any of the preceding claims, wherein the grease has a running torque at -40°C of less than 450 g-cm. A process of forming a grease, the process comprising: mixing a perfluoropolyether oil copolymer with a thickener to form the grease, wherein the perfluoropolyether oil copolymer comprises: about 20 mol% to about 80 mol% of -CF2CF2O- units; about 20 mol% to about 80 mol% of -CF(CF3)CF2O- units; and about 0 mol% to about 45 mol% of one or more additional perfluoroalkyleneoxy units; said copolymer having a viscosity index in the range of about 120 to about 220; andsaid copolymer having an average TFEO run length of less than about 6. The process of claim 16, wherein the mixing comprises milling the perfluoropolyether oil copolymer with the thickener. The process of claims 16 or 17, wherein the thickener is selected from the group consisting of polytetrafluoroethylene, talc, silica, fluorinated ethylene propylene, perfluoroalkoxy alkane, clay, graphite, surface-treated silica, boron nitride, calcium carbonate, and combinations thereof. The process of any of claims 16 through 18, wherein the grease has a starting torque at -40°C of less than 1100 g-cm. The process of any of claims 16 through 19, wherein the grease has a running torque at -40°C of less than 450 g-cm.