Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-04-08
1992-03-31
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525256, 525258, 525259, 525314, 525316, 526173, 526175, C08F29300, C08F 452
Patent
active
051009650
ABSTRACT:
The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-butadiene terpolymers with high trans-1,4-polybutadiene microstructures, high trans-isoprene-butadiene copolymers, and styrene-butadiene copolymers having high trans-1,4-polybutadiene microstructures. Such polymers can be utilized in tire tread rubber compounds which exhibit improved wear characteristics, tear resistance and low temperature performance characteristics. This invention more specifically reveals a process for synthesizing a high trans polymer which comprises adding (a) at least one organolithium initiator, (b) an organoaluminum compound, (c) a barium alkoxide, and (d) a lithium alkoxide to a polymerization medium which is comprised of an organic solvent and at least one conjugated diene monomer.
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Halasa Adel F.
Hsu Wen-Liang
Rockhill Alvin T.
Teskin Fred
The Goodyear Tire & Rubber Company
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