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AGED LANTHANIDE-BASED CATALYST SYSTEMS AND THEIR USE IN THE PREPARATION OF CIS-1,4-POLYDIENES
AGED LANTHANIDE-BASED CATALYST SYSTEMS AND THEIR USE IN THE PREPARATION OF CIS-1,4-POLYDIENES
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机译:老化的基于镧系元素的催化剂体系及其在制备CIS-1,4-聚二烯中的用途
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摘要
A method for preparing cis-1,4-polydienes, the method comprising the steps of preparing a preformed, active lanthanide-based catalyst, aging the active lanthanide-based catalyst for more than 5 days to thereby formed an aged catalyst, and introducing the aged catalyst and conjugated diene monomer to be polymerized to thereby form an active polymerization mixture in which the conjugated diene monomer is polymerized to form a polydiene having a reactive chain end.
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