Polypropylene having a high melt-tensile strength, a process for producing the same and a molded product from the same
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United States of America Patent
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May 16, 1995
Grant Date -
N/A
app pub date -
Nov 5, 1993
filing date -
Nov 26, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A linear, crystalline polypropylene having a branching coefficient of substantially 1, and a specified relation between melt-tensile strength and intrinsic viscosity, a specified relation between crystallization temperature and melting point, a boiling xylene-extraction residue % of 1 wt. % or less and if necessary, a specified ratio of weight average M.W./number average M.W.; a molded product from the above polypropylene; and a process for producing a polypropylene having the above polypropylene blended with di-2-ethylhexyl peroxydicarbonate, are provided, the above polypropylenes having a very high melt-tensile strength and crystallization temperature and also superior stiffness and moldability, to thereby broaden the restricted application fields of conventional polypropylene.
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