Catalyst composition and process for producing copolymer

Details Catalyst composition and process for producing copolymer Catalyst composition and process for producing copolymer

2005-11-01

2005-11-01

Teskin, Fred (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S269000, C526S340000

Reexamination Certificate

active

06960631

ABSTRACT:
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.

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Copy of Supplementary European Search Report dated Apr. 19, 2004, of European Application No. 01919786.

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