Process for incorporating stabilizer into polycondensates

US5580913A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Salih Mumcu · Marl, DE
• Hasso Daebel · Marl, DE

Key dates

• Filing date: Dec 29, 1994
• Grant date: Dec 3, 1996
• Expiry date: Dec 29, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J3/203
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the homogeneous incorporation of a stabilizers into a polycondensate in which the stabilizer is first applied to a finely divided solid polycondensate and the mixture is then revolved in the solid phase of the polycondensate, at temperatures of at least 80.degree. C. Products having an improved color and stability are obtained by this mild incorporation of stabilizer.