Emulsion graft copolymers

US5286801A · kind A · utility

Assignee

• BASF SE

Inventors

• Siegmund Besecke · Hameln, DE
• Daniel Wagner · Bad Dürkheim, DE
• Wilfried Schoen · Ingelheim am Rhein, DE
• Karl-Ludwig Endlich · Mainz, DE

Key dates

• Filing date: Apr 30, 1992
• Grant date: Feb 15, 1994
• Expiry date: Apr 30, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F285/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Emulsion graft copolymers composed of PA0 a) 2-10% by weight of a core composed of PA1 80-99.99% by weight of methyl methacrylate (I), PA1 0.01-5% by weight of allyl methacrylate (II), PA1 0-19.99% by weight of other monofunctional comonomers (III) and PA1 0-3% by weight of other di- or polyfunctional comonomers (IV), PA0 b) 15-50% by weight of a first shell composed of PA1 60-89.99% by weight of a C.sub.1 -C.sub.20 -alkyl acrylate (V), PA1 10-39.99% by weight of a vinylaromatic monomer (VI), PA1 0.01-5% by weight of II, PA1 0-10% by weight of I and/or III, PA1 0-3% by weight of IV, PA0 c) 5-20% by weight of a second shell with a composition as indicated under (a), PA0 d) 15-50% by weight of a third shell with a composition as indicated under (b), PA0 e) 15-30% by weight of a fourth shell composed of PA1 80-99.95% by weight of I, PA1 0.05-2% by weight of a regulator (VII) and PA1 0-19.95% by weight of III, are suitable as additives to increase the impact strength of thermoplastic compositions.