Process for the modification of dispersion powder compositions

US5959017A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Herbert Eck · Burghausen, DE
• Hardy Herold · Burghausen, DE
• Heinrich Hopf · Burghausen, DE

Key dates

• Filing date: Aug 21, 1996
• Grant date: Sep 28, 1999
• Expiry date: Aug 21, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J3/22
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the preparation of water-redispersible dispersion powder compositions which are modified with additives and are based on polymers of ethylenically unsaturated compounds, includes drying the corresponding aqueous polymer dispersion and applying additives, which are liquid at a temperature of .ltoreq.50.degree. C., to a pulverulent carrier material, and then adding the resulting powder during or after drying of said dispersion.