Preparing blends of a synthetic rubber with a poly(arylene oxide

Details Preparing blends of a synthetic rubber with a poly(arylene oxide Preparing blends of a synthetic rubber with a poly(arylene oxide

1982-05-05

1983-06-14

Michl, Paul R.

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

Synthetic resins

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

C08L 7104

Patent

active

043884440

ABSTRACT:
A rubber from a solution polymerization process dissolved in a lower boiling cycloaliphatic hydrocarbon is contacted countercurrently in column means with hot higher boiling aromatic hydrocarbon vapor. The lower boiling cycloaliphatic solvent is stripped out overhead and displaced by the higher boiling aromatic which condenses to form a rubber-in-aromatic solvent solution. The rubbery copolymer-in-aromatic solvent can be readily blended with a poly(arylene oxide) solution in aromatic solvent. The resulting rubber/poly(arylene oxide) blend in the higher boiling aromatic solvent can be readily steam-stripped to form a rubber/poly(arylene oxide) polymer mixture crumb. Optionally, the co-mixed polymers in the higher boiling aromatic solvent are flash concentrated prior to steam-stripping.

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