Impact modifier and molding material containing it

US5336718A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Niessner · Friedelsheim, DE
• Wolfgang Fischer · Meerbusch, DE
• Norbert Guentherberg · Speyer, DE
• Karl Ruppmich · Ludwigshafen, DE
• Friedrich Seitz · Friedelsheim, DE

Key dates

• Filing date: Dec 23, 1992
• Grant date: Aug 9, 1994
• Expiry date: Dec 23, 2012

Classification

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

Abstract

A graft consisting of from 5 to 90% of a core A1 having a glass transition temperature above 25.degree. C. made up of, from 50 to 99.9% of a vinylaromatic monomer and from 0.1 to 10% of a polyfunctional crosslinking and/or graft-linking monomer optionally up to 49.9% of one or more copolymerizable monomers; from 5 to 90% of a first shell A2 of elastomeric material made up of from 50 to 99.8% of an alkyl acrylate and/or of a diene, from 0.1 to 10% of a polyfunctional graft-linking monomer, up to 49.8% of one or more copolymerizable unsaturated monomers and from 0.1 to 10% of one or more monomers containing acidic groups; from 5 to 90% of a second shell A3 of rigid material made up of from 50 to 99.9% of a vinylaromatic monomer, up to 10% of a polyfunctional cross-linking and/or graft-linking monomer, up to 49.9% of one or more copolymerizable monomers and from 0.1 to 20% of a monomer containing one or more basic groups; and optionally up to 85% of a third shell A4 of a copolymer of, from 1 to 99% of one or more vinylaromatic monomers and from 1 to 99% of one or more copolymerizable monomers. The percentages are by weight and based, in the case of the monomers, on the core or shells …