润滑科技信息平台

专利摘要

本发明提供一种包含乙烯-丙烯共聚物和金属皂增稠剂的混合物的开式齿轮润滑剂组合物。乙烯-丙烯共聚物的共混物包括在100℃下运动粘度为80厘沲至220厘沲的第一乙烯-丙烯共聚物和在100℃下运动粘度为500厘沲至3000厘沲的第二乙烯-丙烯共聚物。本发明还涉及一种用开式齿轮润滑剂组合物润滑机械装置的方法。 ......

基本信息

专利类型:
发明专利
申请/专利号:
BR112024011164
申请日期:
2022-12-01
专利申请人:
分类号:
C10M161/00
发明/设计人:
JENNIFER E. CLARK ， ROBERT D. DURA ， CARLOS ALBERTO NAZARIO ， YANG CAO
权利要求: What is claimed is:1. An open gear lubricant composition comprising:(a) at least 40 wt % of a first ethylene-propylene copolymer having a kinematic viscosity at 100°C measured according to ASTM D445-21 of least about 80 centistokes up to about 220 centistokes;(b) 5 wt% to 20 wt% of a second ethylene-propylene copolymer having a kinematic viscosity at 100°C measured according to ASTM D445-21 of at least about 500 centistokes but not more than 3000 centistokes;(c) a metallic soap thickener.2. The open gear lubricant composition of claim 1, wherein the first ethylene-propylene copolymer has a number average molecular weight (Mn) of 1000 Daltons to 4000 Daltons measured by gel permeation chromatography in tetrahydrofuran.3. The open gear lubricant composition of any preceding claim, wherein the first ethylene-propylene copolymer contains 25wt% to 50wt % ethylene.4. The open gear lubricant composition of any preceding claim, wherein the second ethylene-propylene copolymer has a number average molecular weight (Mn) or 4500 Daltons to 10,000 Daltons.5. The open gear lubricant composition of any preceding claim, wherein the second ethylene-propylene copolymer contains 30 wt% to 55 wt % ethylene.6. The open gear lubricant composition of any of any preceding claim, further comprising a phosphorous compound in an amount to deliver 300 ppm to 2000 ppm, phosphorous to the open gear lubricant composition.7. The open gear lubricant composition of claim 6, wherein the phosphorous antiwear agent comprises or consists of a metal dialkyl phosphate.8. The open gear lubricant composition of claim 7, wherein the metal dialkyl phosphate comprises or consists of zinc dialkyl dithiophosphate.9. The open gear lubricant composition of any preceding claim, wherein the open gear lubricant composition comprises 2 wt % to 10 wt%, or 2 wt% to 8 wt%, or 3 wt% to 7 wt% of the metallic soap thickener.10. The open gear lubricant of any preceding claim, wherein the metallic soap thickener comprises the reaction product of a complexing acid and a metal hydroxide, is selected from lithium hydroxide, calcium hydroxide, sodium hydroxide, and mixtures thereof.11. The open gear lubricant composition of claim 10, wherein the metal hydroxide is selected from lithium hydroxide, calcium hydroxide, or aluminum alkoxide.12. The open gear lubricant composition of claim 11, wherein the metal hydroxide comprises or consists of lithium hydroxide.13. The open gear lubricant composition of claim 12, wherein the metallic soap thickener is present in an amount to deliver 500 ppm to 3000 ppm lithium to the composition.14. The open gear lubricant composition of any of claims 10 to 13 wherein the complexing acid comprises or consists of a fatty acid or derivative of castor oil.15. The open gear lubricant composition of any of claims 10 to 14, wherein the complexing acid comprises or consists of 12-hydroxycarboxylic acid.16. The open gear lubricant composition of claim 15, wherein the 12-hydroxycar- boxylic acid is 12-hydroxystearic or ricinoleic, or mixtures thereof17. The open gear lubricant composition of any preceding claim further comprising a sulfur-containing molybdenum compound.18. The open gear lubricant composition of claim 17, wherein the sulfur-containing molybdenum compound is selected from molybdenum disulfide, molybdenum dithiocarbonate, and combinations thereof.19. The open gear lubricant composition of claim 17 or 18, wherein the open gear lubricant composition comprises 3% to 7% by weight of the sulfur containing molybdenum compound or the sulfur containing molybdenum compound is present in an amount to deliver 2% to 5% by weight of molybdenum to the open gear lubricant composition.20. The open gear lubricant composition of any preceding claim, further comprising a boron compound.21. The open gear lubricant composition of claim 20, wherein the boron compound is a potassium borate salt.22. The open gear lubricant composition of claim 20 or 21, wherein the boron compound is present in an amount to deliver 800 ppm to 3000 ppm of boron to the composition.23. The open gear lubricant composition of any preceding claim further comprising one or more additives.24. The open gear lubricant composition of any preceding claim wherein the composition is substantially free of added base oil.25. A method for lubricating a mechanical device, comprising supplying thereto the open gear lubricant composition of claims 1 through 24.26. The use of lubricating a mechanical device, comprising supplying thereto the open gear lubricant composition of any of claims 1 through 24.21