Process for producing moulding compounds modified with acrylic rubber and moulding compounds thus obtained

US6051656A · kind A · utility

Assignee

• BASF SE

Inventors

• Graham Edmund Mc Kee · Neustadt, DE
• Bernhard Rosenau · Neustadt, DE
• Walter Heckmann · Weinheim, DE

Key dates

• Filing date: Oct 8, 1998
• Grant date: Apr 18, 2000
• Expiry date: Oct 8, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/902
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An elastomeric acrylate copolymer which contains, as polymerized units, comonomers having chemically reactive groups is prepared for the preparation of molding materials having good weathering resistance, improved impact strength and good flow properties. This copolymer is dissolved or swollen in monomers such as styrene and acrylonitrile, forming hard graft shells. After the addition of monomers and/or polymers having chemically reactive groups and, if required, after the addition of a chemically reactive crosslinking agent, the resulting monomer/copolymer mixture is subjected to graft polymerization, which is carried out up to a conversion of more than 15% by weight of the monomers, by thermal or free radical mass or solution polymerization. The molding materials can be used as dulling agents for polymer blends.