Impact resistance modifier for polycarbonate

US4997883A · kind A · utility

Assignee

• Rohm GmbH Chemische Fabrik · DE

Inventors

• Jens-Dieter Fischer · Darmstadt, DE
• Werner Siol · Pfungstadt, DE
• Manfred Munzer · Bensheim, DE
• Thomas Rhein · Stadecken-Elsheim, DE

Key dates

• Filing date: Feb 3, 1989
• Grant date: Mar 5, 1991
• Expiry date: Feb 3, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L69/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An impact resistance modifier for polycarbonate, which is a copolymer, comprising an elastomer and a methyl methacrylate copolymer, which are bonded covalently. The methyl methacrylate copolymer is one that is compatible by itself with polycarbonate resin due to specific comonomers. Such comonomers are aromatic (meth)acrylic esters and (meth)acrylamides, cycloalkyl(meth)acrylamides and cycloalkylmaleimides. Thermoplastic molding compounds comprising polycarbonate and the new impact resistance modifier exhibit excellent impact resistance.