Emulsion polymers for modifying impact strength

US4513118A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Norbert Suetterlin
• Peter J. Arndt · Seeheim-Jugenheim, DE
• Ernst Heil · Riedstadt, DE
• Werner Siol · Pfungstadt, DE
• Willi Tilch · Reinheim, DE
• Wilhelm Wopker · Emmelshausen, DE

Key dates

• Filing date: Jan 3, 1984
• Grant date: Apr 23, 1985
• Expiry date: Jan 3, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An emulsion polymer comprising a hard nonelastomeric core, an elastomeric intermediate stage produced in the presence of the core and essentially composed of an acrylic ester and a crosslinking monomer which contains three or more acrylic or methacrylic groups in the molecule, and a hard nonelastomeric final stage produced in the presence of the elastomeric intermediate stage and crosslinked therewith, said polymer being useful as an impact strength modifying agent which, in admixture with a thermoplastic polymethyl methacrylate molding compound for example, yields molded articles exhibiting reduced susceptibility to stress whitening and improved impact strength.