Patent · US Active

Process for producing modified olefin polymer in an extruder

US10105908B2 · kind B2 · utility

3Cited by

6References

17Claims

0Family size

Assignee

Borealis AG · AT

Inventors

Nicke Bergman · Österbymo, SE
Udo Muster · Salzburg, AT
Norbert Reichelt · Ansfelden, AT
Wolfgang Gierlinger · Linz, AT

Key dates

Filing date	Feb 3, 2016
Grant date	Oct 23, 2018
Priority date	—
Expiry date	Feb 3, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2323/14
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.