Ultrahigh molecular weight polyethylene, preparation method thereof and lithium battery diaphragm

• Main Authors: LI JIANGTAO, XU XUEXIANG, LU LIJUN, DENG ZHAOJING
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses ultra-high molecular weight polyethylene, a preparation method thereof and a lithium battery diaphragm. The high-activity Ziegler-Natta type catalyst is prepared by taking in-situ active magnesium oxide as a carrier, so that the usage amount of active components and a cocatalyst of the catalyst can be reduced, and further the residual quantity of metal and ash in an ultra-high molecular weight polyethylene product is reduced fundamentally; meanwhile, the molecular weight and bulk density requirements of the ultra-high molecular weight polyethylene are ensured, and the performance of the material is greatly improved. 本发明公开了一种超高分子量聚乙烯及其制备方法、以及锂电池隔膜。本发明采用原位活性氧化镁为载体制备高活性齐格勒-纳塔型催化剂，能够降低催化剂活性组分及助催化剂的使用量，进而从根本上实现降低超高分子量聚乙烯产品中金属和灰分的残留量，同时保证了超高分子量聚乙烯的分子量和堆密度要求，极大提高了材料的性能。