Methods for preparation of propylene polymers
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United States of America Patent
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Sep 5, 2017
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app pub date -
Oct 30, 2013
filing date -
Oct 30, 2012
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Abstract
Disclosed herein is a polymerization method of propylene, which can prepare a propylene homopolymer with both high fluidity and high rigidity as well as a propylene/α-define copolymer having both high fluidity and a good rigidity-toughness balance by, for example, control of polymerization steps and elevation of polymerization temperature, while the catalyst still maintains a relatively high polymerization activity.
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