Patent · US Expired

Process for improving the processing properties of powdery polyolefins

US4248819A · kind A · utility

6Cited by

10References

13Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Manfred Mayer · Niedernhausen, DE
Gerhard Noltner · Frankfurt am Main, DE
Rudolf Nowack · Frankfurt am Main, DE
Wolfgang Strobel · Tolland, US

Key dates

Filing date	Oct 19, 1978
Grant date	Feb 3, 1981
Priority date	—
Expiry date	Oct 19, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2323/02
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for improving the processing properties of powdery polyolefins. It is endeavored by this process to obtain a polyolefin powder which can be processed on screw extruders to an almost bubble-free product. The polyolefin powder is heated to a temperature of between 40.degree. C. and its melting point and introduced into a gap between two gap-forming elements. In this gap, the powder is compressed with a pressure of from 0.1 to 10 t per cm of gap length, and the powder so compressed is then comminuted.

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