公开(公告)号：US20170361543A1

公开(公告)日：2017-12-21

申请号：US15544204

申请日：2016-02-03

Applicant: Borealis AG

Inventor： Nicke BERGMAN ,  Udo MUSTER ,  Norbert REICHELT ,  Wolfgang GIERLINGER

IPC: B29C67/24 ,  B29B9/06 ,  C08J3/24 ,  B29K23/00

CPC classification number: B29C67/246 ,  B29B9/06 ,  B29C47/30 ,  B29C47/762 ,  B29C47/92 ,  B29K2023/12 ,  C08F255/02 ,  C08J3/24 ,  C08J2323/12 ,  C08J2323/14 ,  C08F236/06

Abstract: The present invention is directed to a process for producing a modified olefin polymer in an extruder having a feed zone, a melting zone, optionally a mixing zone and optionally a die zone, (A) introducing a stream of an olefin polymer into the feed zone of the extruder; (B) introducing a stream of a free radical generator directly into the feed zone or the melting zone or the mixing zone, if present, of the extruder; (C) introducing a stream of a functionally unsaturated compound directly into the feed zone or the melting zone or the mixing zone, if present, of the extruder; (D) extruding the mixture in the extruder at a temperature which is greater than the decomposition temperature of the free radical generator and the melting temperature of the olefin polymer but less than the decomposition temperature of the olefin polymer thereby producing the modified olefin polymer in the extruder; and, optionally, (G) passing the melt of the modified olefin polymer through the die zone to a pelletiser.