Partially crosslinked plastics materials of propylene copolymers

US5371144A · kind A · utility

Assignee

• BASF SE

Inventors

• Sibylle Brosius · Ludwigshafen, DE
• Harald Schwager · Speyer, DE
• Susanne Hahn · Mannheim, DE
• Bernd Lothar Marczinke · Frankfurt, DE

Key dates

• Filing date: Mar 3, 1993
• Grant date: Dec 6, 1994
• Expiry date: Mar 3, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F255/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Partially crosslinked plastics materials having a melt flow index of from 0.1 to 100 g/10 min at 230.degree. C. and under a weight of 2.16 kg, containing PA1 a) a polymer of from 25 to 97% by weight of a propylene copolymer (I) which contains from 0.1 to 15% by weight of polymerized C.sub.2 -C.sub.10 -alk-1-enes and of from 3 to 75% by weight of a further propylene copolymer (II) which contains from 15 to 80% by weight of polymerized C.sub.2 -C.sub.10 -alk-1-enes and PA1 b) an organosilane compound of the following formula (I) EQU A.sub.4-n SiR.sub.n (I) where the radicals A are identical or different and are each an acrylate or methacrylate or vinyl, the radicals R are identical or different and are each C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -acetoxy and n is 1, 2 or 3, are obtainable by reacting the polymer a) with the organosilane compound b) in the presence of a free radical initiator and a condensation catalyst at from 180 to 280.degree. C. and from 1 to 100 bar and in the course of average residence times of the reaction mixture of from 0.2 to 10 minutes. The novel plastics materials have in particular improved processibility and thermoformability, a lower sealing temp…