Weathering-resistant, high-impact, easily colored thermoplastic compositions

US4224419A · kind A · utility

Assignee

• BASF SE

Inventors

• Johann Swoboda · Ludwigshafen, DE
• Gerhard Lindenschmidt · Leimen, DE
• Claus Bernhard · Eisenberg, DE

Key dates

• Filing date: Apr 17, 1979
• Grant date: Sep 23, 1980
• Expiry date: Apr 17, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F265/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Mixtures which essentially consist of a graft copolymer (A), a graft copolymer (B) and a hard component (C), the latter consisting of copolymers of stryrene and/or .alpha.-methylstyrene with acrylonitrile. The graft copolymers (A) and (B) are each based on a crosslinked acrylic ester rubber onto which is grafted a mixture of styrene and acrylonitirle. They differ only slightly in chemical composition, but differ substantially in the particle size of the acrylic ester base used for grafting. The weight ratio of the grafting bases can be from 90:10 to 35:65, and the proportion of the two grafting bases together, based on the total mixture, is from about 10 to 35 percent by weight. Mixtures of the above 3 components are weathering-resistant, exhibit a high impact strength, and are easy to color. The use of such mixtures by conventional thermoplastic processing methods, eg. extrusion or injection molding, gives, especially after the material has been colored, vitrually no difference in hue in the vicinity of a gate or of a weld line, so that a great variety of moldings for daily use or for leisure purposes can be produced.