Method for isolating ionomers in the salt form

Details Method for isolating ionomers in the salt form Method for isolating ionomers in the salt form

1984-02-21

1985-04-16

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528490, 528492, C08F 600, C08G 0000, C08J 300

Patent

active

045117128

ABSTRACT:
Ionomers such as sulfonated polystyrenes are isolated from solutions in organic solvents (e.g., methylene chloride) in the salt form (usually the ammonium or amine salt form) by blending the ionomer solution with a solution of a salt in an organic liquid which is substantially a non-solvent for said ionomer. The salt is one in which the counterion is identical to that of the ionomer or below it in the ion affinity sequence, and is preferably an ammonium salt, especially ammonium chloride. The preferred organic liquid is methanol. The method enables recovery of the precipitated ionomer in finely divided, granular form rather than in colloidal condition.

REFERENCES:
patent: 3870841 (1975-03-01), Makowski et al.
patent: 4065522 (1977-12-01), Myers et al.

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