Patent · US Active

Process for preparing a polyolefin composition

US10899041B2 · kind B2 · utility

2Cited by

14References

19Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Peter Kruempel · Bad Camberg, DE
Elke Damm · Bad Vilbel, DE
Reinhard Kuehl · Bornheim, DE
Phil Pyman · Lymm, GB

Key dates

Filing date	Jul 10, 2019
Grant date	Jan 26, 2021
Priority date	—
Expiry date	Aug 27, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2323/08
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for continuously preparing a polyolefin composition made from or containing a bimodal or multimodal polyolefin and one or more additives in an extruder device equipped with at least one hopper. The process includes the steps of supplying a bimodal or multimodal polyolefin in form of a polyolefin powder to the hopper; (a) measuring the flow rate of the polyolefin powder or (b) measuring the flow rate of the prepared polyolefin pellets; supplying one or more additives to the hopper; adjusting the flow rates of the additives supplied to the hopper in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the polyolefin powder and additives within the extruder device; and pelletizing the molten polyolefin composition into the polyolefin pellets.

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