Thermoplastic moulding compounds

US6235839A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Güntherberg · Speyer, DE
• Martin Weber · Maikammer, DE
• Konrad Knoll · Mannheim, DE
• Gerhard Lindenschmidt · Leimen, DE

Key dates

• Filing date: Mar 17, 1999
• Grant date: May 22, 2001
• Expiry date: Mar 17, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L53/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermoplastic molding compositions comprising PA1 A) a graft polymer comprising PA2 1) an elastomeric graft core, obtainable by copolymerization of one or more C.sub.1 -C.sub.10 -alkyl acrylates, and a monomer with crosslinking effect, and PA2 2) a graft shell comprising a styrene compound or a C.sub.1 -C.sub.8 -alkyl acrylate or methacrylate, or a mixture of the styrene compound and the C.sub.1 -C.sub.8 -alkyl acrylate or methacrylate, and PA1 B) a thermoplastic polymer comprising PA2 C) an elastomeric block copolymer in which all or virtually all of the olefinic double bonds have been hydrogenated, comprising at least one block A, which forms a hard phase and contains, in its polymer chain, units of a vinylaromatic monomer, and/or a block B, which forms a first elastomeric (soft) phase and contains diene monomers, and at least one elastomeric block B/A, which forms a soft phase, and contains, randomly in its polymer chain, units of both a vinylaromatic monomer and a diene, where the glass transition temperature T.sub.g of the block A is above 25.degree. C. and that of the block B/A is below 25.degree. C. and the phase-volume ratio of block A to block B/A is chosen so that the pro…