THERMOPLASTIC ELASTOMER COMPOSITIONS COMPRISING CRYSTALLINE POLYOLEFIN, HALOGENATED BUTYL RUBBER, OLEFIN COPOLYMER RUBBER AND MODIFIED POLYOLEFIN

摘要

PCT No. PCT/US86/01306 Sec. 371 Date Feb. 18, 1987 Sec. 102(e) Date Feb. 18, 1987 PCT Filed Jun. 16, 1986 PCT Pub. No. WO86/07600 PCT Pub. Date Dec. 31, 1986.A thermoplastic elastomer composition and process comprising a crystalline polyolefin, halogenated butyl rubber, olefin copolymer rubber, polyolefin modified with, e.g., maleic anhydride, and, optionally nitrile rubber, wherein the halogenated butyl rubber is at least partially crosslinked using a metal oxide and/or chloride, e.g., zinc oxide. Crosslinking is achieved under dynamic mixing conditions and the resulting composition has superior strength, performance and processing properties. Furthermore, use of nitrile rubber imparts improved oil resistance to the composition.