Process for preparing protective-colloid-stabilized vinylaromatic-1,3-diene copolymers

US6590022B1 · kind B1 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Thomas Bastelberger · Emmerting, DE
• Reinhard Haerzschel · Burghausen, DE
• Theo Mayer · Julbach, DE
• Peter Weitzel · Reischach, DE
• Peter Ball · Emmerting, DE

Key dates

• Filing date: May 21, 2000
• Grant date: Jul 8, 2003
• Expiry date: May 21, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F236/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method is provided for producing protective colloid-stabilized vinyl aromatic-1.3-diene-copolymers in the form of their aqueous polymer dispersions or in the form of a powder which can be re-dispersed in water, by emulsion-polymerizing a mixture containing at least one vinyl aromatic and at least one 1,3-diene in the presence of a protective colloid and optionally, drying the resulting polymer dispersions. In the method part of the protective colloid is provided straightaway and part is metered.