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US 2003/0166458 A1Published application
Catalyst composition and process for producing copolymer
AssigneeRiken
InventorsShojiro Kaita, Zhaomin Hou, Yasuo Wakatuki
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AssigneeRiken
InventorsShojiro Kaita, Zhaomin Hou, Yasuo Wakatuki
Estimating the term…
A method for block copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises the steps of carrying out homopolymerization of the conjugated diene in the presence of a catalyst composition comprising the following components: (A) a metallocene type complex of a rare earth metal compound, and (B) an ionic compound composed of a non-coordinate anion and a cation and/or an aluminoxane, and then adding the aromatic vinyl compound, and a catalyst composition for polymerization of a conjugated diene or copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises the following components: (D) a neodymium complex, and (B) an ionic compound composed of a non-coordinate anion and a cation and/or an aluminoxane.
A method for block copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises the steps of carrying out homopolymerization of the conjugated diene in the presence of a catalyst composition comprising the following components:
A block copolymer of a conjugated diene and an aromatic vinyl compound, wherein a cis-1,4-configuration content in the microstructure is 80 mol % or more, a molecular weight is 10,000 or more, and a molecular weight distribution Mw/Mn is 2.50 or less.
A catalyst composition for polymerization of a conjugated diene or copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises the following components:
A co-catalyst for use in combination with a catalyst containing a neodymium complex for polymerization of a conjugated diene or a catalyst containing a neodymium complex for copolymerization of a conjugated and an aromatic vinyl compound, which comprises an ionic compound composed of a non-coordinate anion and a cation and/or an aluminoxane.
Dependencies are inferred from the claim text.