Bismaleimide-crosslinked, flexible polyolefin blends

US5362808A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Jun 7, 1993
• Grant date: Nov 8, 1994
• Expiry date: Jun 7, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2312/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Partially crosslinked polyolefin blends contain PA0 a) a polymer of from 25 to 97% by weight of a propylene polymer (I), which contains from 0 to 15% by weight of polymerized C.sub.2 -C.sub.10 -alka-1-enes, and of from 3 to 75% by weight of a further propylene polymer (II) which contains from 15 to 80% by weight of polymerized C.sub.2 -C.sub.10 -alka-1-enes, PA0 b) a random ethylene copolymer containing from 5 to 20% by weight of polymerized C.sub.3 -C.sub.10 -alk-1-enes and having a density of from 0.89 to 0.925 g/cm.sup.3 at room temperature, PA0 c) a rubber-like material having a Shore A hardness of from 30 to 90 and PA0 d) a bismaleimido compound of the following formula (I) ##STR1## where R is C.sub.1 -C.sub.20 -alkyl which may be interrupted by one or more oxygen atoms, PA0 C.sub.5 -C.sub.7 -cycloalkyl or C.sub.6 -C.sub.15 -aryl, each of which in turn may be substituted by one or more C.sub.1 -C.sub.10 -alkyl and/or C.sub.1 -C.sub.6 -alkoxy and/or C.sub.1 -C.sub.4 -dialkylamino groups, or a radical of the following formula (II) EQU R.sup.1 --Z--R.sup.2 (II) PA0 where R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.10 -alkyl, C.sub.5 -C.sub.7 -cycloalk…