Catalyst system for polymerization of 1,3-butadiene to...

Details Catalyst system for polymerization of 1,3-butadiene to... Catalyst system for polymerization of 1,3-butadiene to...

C - Chemistry, Metallurgy

08

F

252/123, 402/474

C08F 4/48 (2006.01) C08F 136/06 (2006.01)

Patent

CA 2036655

Abstract of the Disclosure CATALYST SYSTEM FOR POLYMERIZATION OF 1,3-BUTADIENE TO TRANS-1,4-POLYBUTADIENE Trans-1,4-polybutadiene is a thermoplastic resin rather than a rubber at room temperature by virtue of its high degree of crystallinity. Because trans-1,4-polybutadiene contains many double bonds in its backbone, it can be blended and cocured with rubbers. It is accordingly an attractive alternative to conventional fillers such as carbon black, which are typically utilized in compounding rubber. By utilizing the catalyst system and techniques of this invention, trans-1,4-polybutadiene can be synthesized at a high level of conversion. This invention specifically relates to a process for the synthesis of trans-1,4-polybutadiene by an anionic polymerization process which comprises: (a) adding an organolithium compound and an alkali metal alkoxide as a catalyst system to a polymerization medium containing 1,3-butadiene monomer and an organic solvent; and (b) allowing the 1,3-butadiene monomer to polymerize at a temperature which is within the range of about -10°C to about 45°C to produce the trans-1,4-polybutadiene.

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