Thermoplastic molding compositions containing polycarbonate and an acrylate graft copolymer

US4605699A · kind A · utility

Assignee

• BASF SE

Inventors

• Konrad Mitulla · Ludwigshafen, DE
• Juergen Hambrecht · Heidelberg, DE
• Adolf Echte · Ludwigshafen, DE
• Johann Swoboda · Ludwigshafen, DE
• Peter Siebel · Schifferstadt, DE
• Josef Schwaab · Maikammer, DE
• Herbert Frank · Bad Dürkheim, DE

Key dates

• Filing date: Apr 11, 1985
• Grant date: Aug 12, 1986
• Expiry date: Apr 11, 2005

Classification

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

Abstract

A thermoplastic molding material consists of from 10 to 90 parts by weight of a polycarbonate A and from 90 to 10 parts by weight of a graft copolymer B having a mean particle size of from 200 to 700 nm (d.sub.50 value of the integral mass distribution). The graft polymer B is formed from an elastomer (rubber) (b.sub.1), which accounts for from 10 to 80% by weight, and a grafted shell (b.sub.2), which accounts for from 90 to 20% by weight, the percentages in each case being based on (B). The elastomer (b.sub.1) is composed of from 50 to 99.9% by weight of an alkyl acrylate, where alkyl is of 1 to 8 carbon atoms, and from 0.1 to 5% by weight of a copolymerizable polyfunctional crosslinking monomer. The grafted shell (b.sub.2) is produced in three stages and contains, as graft monomers, PA0 (b.sub.2 a.sub.1) from 5 to 40% by weight of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms, PA0 in the first stage, PA0 (b.sub.2 a.sub.2) from 15 to 50% by weight of a mixture of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms and a copolymerizable ethylenically unsaturated monomer, in a weight ratio of from 90:10 to 60:…