Partially crosslinked polymer composition

US5244976A · kind A · utility

Assignee

• BASF SE

Inventors

• Sibylle Brosius · Ludwigshafen, DE
• Klaus-Dieter Ruempler · Monsheim, DE
• Erhard Seiler · Ludwigshafen, DE
• Susanne Hahn · Mannheim, DE
• Karl Huber · Bischofswerda, DE
• Rainer A. Werner · Annaberg-Buchholz, DE

Key dates

• Filing date: Mar 6, 1992
• Grant date: Sep 14, 1993
• Expiry date: Mar 6, 2012

Classification

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

Abstract

A partially crosslinked polymer composition having a melt flow index of from 0.1 to 50 g/10 min at 230.degree. C. under a weight of 2.16 kg and comprising PA0 a) a polymer comprising from 25 to 95% by weight of polypropylene and 5 to 75% by weight of a propylene copolymer with copolymerized C.sub.2 -C.sub.10 -alk-1-enes, the comonomer content being from 1 to 45% by weight, based on the total polymer, PA0 b) an organosilane compound of the formula (I) EQU A.sub.4-n SiR.sub.n (i) PA0 where A are identical or different acrylates or methacrylates or vinyl groups, R are identical or different C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -acetoxy groups, and n is 1, 2 or 3, obtainable by reacting the polymer a) with the organosilane compound b) in the presence of a free-radical initiator and in the presence of a condensation catalyst at from 180.degree. to 280.degree. C., and at from 1 to 100 bar and at a mean residence time of the reaction mixture of from 0.2 to 10 minutes, has, in particular, high notched impact strength, increased puncture resistance and improved weld line strength.