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AssigneesJapan as represented by Director General of Agency of Industrial Science and Technology, Japan Chemical Innovation Institute
InventorsKazuo Soga, Takeshi Shiono, Michihiko Asai, Yasuzo Suzuki, Akira Miyazawa, Kenji Tsuchihara, Masahide Murata, Hiroyuki Ozaki, Masanao Kawabe, Toshio Kase, Jizhu Jin, Hideaki Hagiwara, Yoshifumi Fukui
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A process for preparing olefinic living polymers having a molecular weight distribution (Mw/Mn) of 1 to 1.3, comprising polymerizing an olefinic monomer having 2 to 20 carbon atoms at low temperatures in the presence of a catalyst comprising (A) a hafnium or zirconium-containing compound having one or two cyclopentadienyl backbones, (B) a triphenyl boron compound or a tetraphenyl borate compound and optionally (C) a specific mono-, di- or trialkylaluminum compound. When the catalyst comprising the zirconium-containing compound is prepared by further using a titanium-containing compound (D), the polymerization temperature can be raised.
A process for preparing olefinic living polymers comprising polymerizing an olefinic monomer having 2 to 20 carbon atoms at a polymerization temperature of −20 to −1000° C. in the presence of a catalyst comprising:
A process for preparing olefinic living polymers comprising polymerizing an olefinic monomer having 2 to 20 carbon atoms at a polymerization temperature of −60 to −100° C. in the presence of a catalyst comprising:
A process for preparing olefinic living polymers comprising polymerizing an olefinic monomer having 2 to 20 carbon atoms at a polymerization temperature of −20 to −100° C. in the presence of a catalyst comprising:
A process for preparing olefinic living polymers comprising polymerizing an olefinic monomer having 2 to 20 carbon atoms at a polymerization temperature of −20 to −100° C. in the presence of a catalyst comprising:
Dependencies are inferred from the claim text.