Process for mixing polymer melts with additives

US7138478B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klemens Kohlgrüber · Lingen (Ems), DE
• Günther Holdenried · Leichlingen, DE
• Christian Kords · Krefeld, DE
• Jürgen Heuser · Krefeld, DE
• Thomas König · Nuremberg, DE

Key dates

• Filing date: Apr 16, 2004
• Grant date: Nov 21, 2006
• Expiry date: Apr 16, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2069/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A continuous process for mixing polymer melts with additives, in particular polycarbonate melts with additives in liquid form, in solution or in dispersion is described. The additives are added to a main stream of polymer melt and are then mixed, preferably directly, with the main stream in a static mixer.