Patent · US Active

Process for pelletizing polymer melts comprising low-boiling substances

US7897077B2 · kind B2 · utility

2Cited by

6References

8Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Seibring · Freinsheim, DE
Jens Becker · Ludwigshafen am Rhein, DE
Michael Kopietz · Frankfurt, DE
Theodor Bruckmann · Greven, DE

Key dates

Filing date	Mar 21, 2007
Grant date	Mar 1, 2011
Priority date	—
Expiry date	Sep 13, 2027

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29K2077/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process for pelletizing polymer melts, at above ambient pressure, in a pelletizing chamber into which a cutting apparatus has been inserted. In a first step, the pelletizing chamber is flooded with a gas which is inert toward the polymer melt and whose pressure is that at which the pelletizing process is carried out. The polymer melt is then injected into the pelletizing chamber. Finally, the gas is displaced from the pelletizing chamber via a liquid as soon as the polymer melt begins to flow through the cutting apparatus, this melt being cut into pellets.

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