Process for preparing a rubbery terpolymer of styrene,...

Details Process for preparing a rubbery terpolymer of styrene,... Process for preparing a rubbery terpolymer of styrene,...

C - Chemistry, Metallurgy

08

L

402/421

C08L 9/06 (2006.01) C08F 236/10 (2006.01)

Patent

CA 2035229

Abstract of the Disclosure PROCESS FOR PREPARING A RUBBERY TERPOLYMER OF STYRENE, ISOPRENE AND BUTADIENE The subject invention relates to a technique for synthesizing rubbery terpolymers of styrene, isoprene and butadiene. These rubbery terpolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing such terpolymers in tire treads, tires having improved wet skid resistance can be built without sacrificing rolling resistance or tread wear characteristics. The subject invention specifically discloses a process for preparing a rubbery terpolymer of styrene, isoprene, and butadiene having multiple glass transition temperatures and having an excellent combination of properties for use in making tire treads which comprises: terpolymerizing styrene, isoprene and 1,3-butadiene in an organic solvent at a temperature of no more than about 40°C in the presence of (a) at least one member selected from the group consisting of triperidino phosphine oxide and alkali metal alkoxides and (b) an organolithium compound.

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