公开(公告)号：US11879108B2

公开(公告)日：2024-01-23

申请号：US17600797

申请日：2020-03-23

申请人： BASF SE

发明人： Ivette Garcia Castro ,  Wolfgang Grabarse ,  Jan Strittmatter ,  Rene Koschabek ,  Robert Rupaner

IPC分类号： C10M107/28 ,  C08F220/18 ,  C08F210/02 ,  C10M145/14

CPC分类号： C10M107/28 ,  C08F210/02 ,  C08F220/1808 ,  C10M145/14 ,  C08F2800/20 ,  C10M2205/022 ,  C10M2209/0845 ,  C08F210/02 ,  C08F220/1804 ,  C08F220/1808 ,  C08F210/02 ,  C08F220/1812 ,  C08F210/02 ,  C08F220/1804 ,  C08F210/02 ,  C08F220/1808 ,  C08F220/1808 ,  C08F210/02 ,  C08F220/1804 ,  C08F210/02 ,  C08F220/1804 ,  C08F220/1812 ,  C08F220/1808 ,  C08F210/02 ,  C10M2205/022 ,  C10M2209/084 ,  C08F210/02 ,  C08F220/18 ,  C08F2500/02 ,  C08F2500/06 ,  C08F2500/17

摘要： The present invention relates to a middle-pressure polymerization process for the preparation of 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, where a monomer mix comprising the ethylene and the acrylate is polymerized at a pressure of 50 to 400 bar and in the presence of at least 2 wt % of a chain transfer agent. The invention further relates to a liquid ethylene copolymer obtainable by the polymerization process; and to a lubricant comprising the liquid ethylene copolymer obtainable by the polymerization process; and to a method for reducing friction between moving surfaces comprising the step of contacting the surfaces with the lubricant or with the ethylene copolymer.