Invention Application
WO2006102119A3 METHODS FOR MODULATED DEGENERATIVE TRANSFER LIVING POLYMERIZATION AND ISOTACTIC-ATACTIC STEREOBLOCK AND STEREOGRADIENT POLY(OLEFINS) THEREBY
审中-公开
用于调节变性转移聚合和等位基因的立体异构体和立体聚合物（烯烃）的方法
- Patent Title: METHODS FOR MODULATED DEGENERATIVE TRANSFER LIVING POLYMERIZATION AND ISOTACTIC-ATACTIC STEREOBLOCK AND STEREOGRADIENT POLY(OLEFINS) THEREBY
- Patent Title (中): 用于调节变性转移聚合和等位基因的立体异构体和立体聚合物（烯烃）的方法
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Application No.: PCT/US2006009793Application Date: 2006-03-17
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Publication No.: WO2006102119A3Publication Date: 2006-11-09
- Inventor: SITA LAWRENCE R , HARNEY MATTHEW B , ZHANG YONGHUI
- Applicant: SITA LAWRENCE R , HARNEY MATTHEW B , ZHANG YONGHUI
- Assignee: SITA LAWRENCE R,HARNEY MATTHEW B,ZHANG YONGHUI
- Current Assignee: SITA LAWRENCE R,HARNEY MATTHEW B,ZHANG YONGHUI
- Priority: US66255005 2005-03-17
- Main IPC: C08F4/64
- IPC: C08F4/64 ; C08F4/52
Abstract:
A method of producing a multiblock, stereoblock polyolefin having substantially uniform microstructure is disclosed. The method includes contacting a Ziegler-Natta pre-catalyst with a co-catalyst and an olefin to polymerize the olefin and form a first stereoblock, adding a methyl donator that changes the stereoregularity of the polymerization, and polymerizing the olefin to form a second stereoblock. The methods of the present invention allow for the production of poly(olefin)s having predictable degrees of incorporation of stereoerrors of a known type. The methods allows for the production of a variety of poly(olefin) microstructures, ranging from stereoblock to stereogradient poly(olefin)s and poly(olefin)s having fully isotactic to fully atactic microstructures.
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