Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-12-19
1992-04-14
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526160, 526308, 526335, 5263402, 5263403, 502117, C08F 3620
Patent
active
051049562
ABSTRACT:
Homogeneous catalyst systems are provided for cyclopolymerization of diolefins, particularly 1,5-hexadiene, which control the stereochemistry, microstructure, and physical properties of the polymers synthesized. The systems comprise homogeneous Ziegler-Natta catalysts based on group 4 metallocenes and methylalumoxane. The cyclopolymers synthesized exhibit different degrees of stereoregularity, which is a function of the polymerization conditions. In addition, the polyolefins can be chiral and optically active. The polymers produced are of high molecular weight and highly flexible.
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Board of Trustees of the Leland Stanford Junior Univ.
Schofer Joseph L.
Zitomer Fred
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