Method of making condensed phase polymers

Details Method of making condensed phase polymers Method of making condensed phase polymers

1987-10-09

1989-08-15

Briggs, Jr., Wilbert J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525271, 525274, 525288, 526240, 526279, C08F21208, C08F23000, C08F23008, C08F23010

Patent

active

048576158

ABSTRACT:
The present invention relates to a method of making elastomeric copolymers and block copolymers, e.g., based upon styrene/isoprene, having a novel condensed phase structure wherein polymer branches occur along the polymer backbone, either at a predetermined location or at random locations. The method comprises the step of reacting, under polymerization conditions, hydrocarbyl lithium initiator, at least one anionically polymerizable compound, and an organometallic- substituted styrene condensing agent. The reactants may be added simultaneously to produce a copolymer with polymer branch segments randomly located along the polymer backbone or sequentially to produce a copolymer with branches located at the same predetermined location along the polymer backbone. The resultant polymers may be further reacted with a linking agent to form multi-arm copolymers.

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