润滑科技信息平台

专利摘要

本发明涉及包含液态乙烯共聚物的润滑剂,该共聚物包含聚合形式的20至60重量%的乙烯; 以及至少20wt%的选自(甲基)丙烯酸C1-C22烷基酯的丙烯酸酯。本发明还涉及液态乙烯共聚物; 以及一种减少运动表面之间摩擦的方法,包括使表面与润滑剂或乙烯共聚物接触的步骤。 ......

基本信息

专利类型:
发明专利
申请/专利号:
EP2019713716
申请日期:
2019-03-14
专利申请人:
分类号:
["C10M145/14","C10M107/04","C10M107/28","C08F210/02","C10N20/00","C10N20/02","C10N20/04","C10N30/02"]
发明/设计人:
WENDKER, MARTIN ， GARCIA CASTRO, IVETTE ， STRITTMATTER, JAN ， GEYER, KAROLIN ， GRABARSE, WOLFGANG ， SCHERER, MARKUS ， KOSCHABEK, RENE
权利要求: 1. A lubricant comprising a liquid ethylene copolymer which comprises in polymerized form - 20 to 60 wt% of ethylene; and - at least 20 wt% of an acrylate, which is selected from C1-C22 alkyl (meth)acrylate, and where the acrylate comprises - a polar acrylate selected from C1-C5 alkyl (meth)acrylate, and - an unpolar acrylate selected from C6-C22 alkyl (meth)acrylate where the ethylene copolymer has a pour point below 25 °C, where the ethylene copolymer has a number-average molecular weight Mn up to 25000 g/mol, where the ethylene copolymer is free of further monomers which are vinylester of the formula (I) in polymerized form where Rc, Rd, and Re are each independently H or C1-C4-alkyl, and Rf is C1-C20 alkyl, where the ethylene copolymer is free of further monomers which are hydroxyalkyl (meth)acrylates, and where the lubricant further comprises - a base oil selected from mineral oils, polyalphaolefins, polymerized and interpolymerized olefins, alkyl naphthalenes, alkylene oxide polymers, silicone oils, phosphate ester and carboxylic acid ester; and/or - a lubricant additive.2. The lubricant according to claim 1 where the ethylene copolymer has a pour point below 15 °C.3. The lubricant according to any of claims 1 or 2 where the ethylene copolymer has a cloud point of below 25 °C, preferably below 20 °C, and in particular below 15 °C.4. The lubricant according to any of claims 1 to 3 where the ethylene copolymer comprises in polymerized form 25 to 55 wt% of the ethylene.5. The lubricant according to any of claims 1 to 4 where the ethylene copolymer comprises in polymerized form at least 40 wt%, preferably at least 50 wt% of the acrylate.6. The lubricant according to any of claims 1 to 5 where the ethylene copolymer is free of further monomers beside the ethylene and the acrylate.7. The lubricant according to any of claims 1 to 6 where polar acrylate is methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, or n-butyl (meth)acrylate.8. The lubricant according to any of claims 1 to 7 where - the polar acrylate is selected from C3-C4 alkyl acrylate, and - the unpolar acrylate selected from C8-C22 alkyl acrylate.9. The lubricant according to any of claim 1 to 8 where the ethylene copolymer comprises in polymerized form - 25 to 55 wt% of ethylene, - at least 20 wt% of the polar acrylate, and - at least 15 wt% of the unpolar acrylate.10. The lubricant according to any of claim 1 to 9 where the ethylene copolymer comprises in polymerized form - 30 to 50 wt% of ethylene, - 25 to 50 wt% of the polar acrylate, and - 20 to 40 wt% of the unpolar acrylate.11. The lubricant according to any of claims 1 to 10 where the weight ratio of the unpolar acrylate to the polar acrylate is from 20:80 to 65:35.12. The lubricant according to any of claim 1 to 11 where the unpolar acrylate is selected from (meth)acrylates of n-octyl, isooctyl, 2-ethylhexyl, n-nonyl, 2-propylheptyl, n-decyl, un-decyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, 2-butyloctyl, 2-pentylnonyl, 2-hexyldecyl, isohexyl, isoheptyl, isooctyl, isononyl, isodecyl, isoundecyl, isododecyl, isotridecyl, isotetradecyl, isopentadecyl, isohexadecyl, isoheptadecyl, isooctadecyl and mixtures thereof.13. The lubricant according to any of claims 1 to 12 where the ethylene copolymer has a number-average molecular weight Mn up to 15000 g/mol, and in particular up to 13000 g/mol.14. A method for reducing friction between moving surfaces comprising the step of contacting the surfaces with the lubricant as defined in any of claims 1 to 13.15. A use of the ethylene copolymer as defined in any of claims 1 to 14 for thickening of a lubricant.