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1. (WO2018045030) POLYOLEFINS WITH LOW ASH CONTENT AND METHOD OF MAKING SAME

Pub. No.:    WO/2018/045030    International Application No.:    PCT/US2017/049377
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu Aug 31 01:59:59 CEST 2017
IPC: C08F 4/64
C08F 10/06
C08F 210/06
Applicants: W.R. GRACE & CO. - CONN
Inventors: VAN EGMOND, Jan, Willem
Title: POLYOLEFINS WITH LOW ASH CONTENT AND METHOD OF MAKING SAME
Abstract:
A polymerization process includes contacting an olefin or a mixture of the olefin and one or more copolymerizable comonomers under polymerization conditions with a catalyst composition and forming a polymer with a total ash content of less than 15 ppm. The catalyst composition includes one or more polymerization catalysts; and a mixed external electron donor comprising a selectivity control agent comprising at least one silicon-containing compound containing at least one C1-C10 alkoxy group bonded to a silicon atom.