Preparation of rubber-modified molding materials by means of groups which are incorporated in the rubber and form free radicals on thermal decomposition

US5910553A · kind A · utility

Assignee

• BASF SE

Inventors

• Graham E. McKee · Ludwigshafen, DE
• Rainer Moors · Schifferstadt, DE
• Hermann Gausepohl · Mutterstadt, DE
• Joachim Seibring · Freinsheim, DE

Key dates

• Filing date: May 12, 1997
• Grant date: Jun 8, 1999
• Expiry date: May 12, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L51/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, at least one first monomer (b) which forms free radicals on thermal decomposition and, if required, a second monomer (c) or a plurality thereof is polymerized, preferably with free radicals, to give a rubber (B), in a second stage, the resulting rubber (B) is mixed with a third monomer (d) or a plurality thereof, preferably dissolved or swollen therein, to form a second mixture (C), and in a third stage, the second mixture (C) is polymerized with free radicals to give the rubber-modified molding material (D).