PROCESS FOR THE PRODUCTION OF HIGH-STRENGTH POLYOLEFIN COMPOSITIONS AND POLYOLEFIN COMPOSITIONS PRODUCED BY THIS PROCESS

摘要

The present invention refers to a process for the preparation of bimodal polyolefin nanocomposites, wherein a first precatalyst for production of ultrahigh molecular polyolefin was supported on a first support comprising metal oxide nanotubes, and separately a second precatalyst for production of lower molecular weight polyolefin was supported on a second support not comprising metal oxide nanotubes. In the presence of the two supported precatalysts and preferably an activator a polyolefin was polymerized. The invention further refers to a polymer composition comprising ultrahigh molecular polyolefin and lower molecular weight polyolefin and metal oxide nanotubes.