Removing residual volatiles from polymer dispersions

US6096858A · kind A · utility

Assignee

• BASF SE

Inventors

• Johannes Dobbelaar · Monsheim, DE
• Wolfgang Hubinger · Schifferstadt, DE
• Peter Keller · Bruchmühlbach-Miesau, DE
• Bernd Stanger · Dudenhofen, DE

Key dates

• Filing date: Jun 23, 1999
• Grant date: Aug 1, 2000
• Expiry date: Jun 23, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F6/006
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The process of the present invention for removing residual volatiles from polymer dispersions by performing first chemical deodorization using an initiator to remove residual monomers and then physical deodorization to remove volatile constituents comprises conducting the chemical deodorization for as long as the decrease in monomers is greater than the increase in secondary components introduced into the dispersion by the initiator, to result reliably in polymer dispersions having a residual volatiles content of less than or equal to 100 ppm.