Method for preparing asymmetric radial copolymers having two fir

Details Method for preparing asymmetric radial copolymers having two fir Method for preparing asymmetric radial copolymers having two fir

1993-11-09

1995-07-04

Wu, Shean

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

Synthetic resins

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

525105, 525237, 525314, C08L 900

Patent

active

H00014648

ABSTRACT:
A method for preparing asymmetric radial polymers wherein the different polymeric arms are contacted sequentially with a coupling agent. The method narrows the relative arm distribution of the several asymmetric radial polymers produced and significantly increases the amount of total product having the desired ratio of polymeric arms. Any coupling agent known in the prior art to be useful in the production of asymmetric radial polymers may be used in the method of this invention but coupling agents having from three to about twelve functional groups are most effective.

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