High-impact dimensionally stable polyamide molding compositions

US4822852A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dieter Wittmann · Leverkusen, DE
• Uwe Westeppe · Mettmann, DE
• Karsten-Josef Idel · Krefeld, DE
• Christian Lindner · Bensheim, DE
• Josef Merten · Korschenbroich, DE
• Harald Selbeck · Krefeld, DE

Key dates

• Filing date: Oct 26, 1987
• Grant date: Apr 18, 1989
• Expiry date: Oct 26, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to thermoplastic molding compositions showing improved properties, more especially improved dimensional stability and notched impact strength, particularly at low temperatures, in the form of a mixture of at least 35% by weight of a copolyamide containing polydiorganosiloxane carbonamide units and/or of a mixture of partly crystalline polyamides and (co)polyamides containing polydiorganosiloxane carbonamide units and from 1 to 65% by weight of graft products of vinyl polymers on rubbers. The invention also relates to the dimensionally stable molding compositions tough at low temperatures characterized above which additionally contain amorphous siloxane-free polyamides added in quantities of up to 64% by weight.