Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2007-03-27
2007-03-27
Lu, Caixia (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S103000, C526S160000, C526S164000, C526S165000, C526S134000, C526S340000
Reexamination Certificate
active
10233593
ABSTRACT:
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) a metallocene-type complex of a rare earth metal compound (samarium complex etc.), and (B) an ionic compound composed of a non-coordinate anion and a cation (triphenylcarbonium tetrakis(pentafluorophenyl)borate etc.) and/or an aluminoxane. The catalyst composition is useful for producing a polymer having a high cis-1,4-configuration content in the microstructure and a narrow molecular weight distribution.
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Hou Zhaomin
Kaita Shojiro
Wakatsuki Yasuo
Lu Caixia
Millen White Zelano & Branigan P.C.
Riken
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