| 摘要 |
A polybutene-1 mixture which forms heat sealable, transparent film having good initial tear resistance and resistance to tear propagation are produced by polymerizing liquid butene-1 at 60 DEG -120 DEG C. employing as catalyst a dihalidefree mixture of diethylaluminum monochloride and TiCl3.nAlCl3 wherein n is 0.2 to 0.6, and isolating the unfractionated mixture of polymers.
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