Process for the removal of N-vinylcarbazole from poly(N-vinylcar

Details Process for the removal of N-vinylcarbazole from poly(N-vinylcar Process for the removal of N-vinylcarbazole from poly(N-vinylcar

1990-06-04

1992-12-29

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528495, 528497, C08F 610

Patent

active

051752484

ABSTRACT:
The residual level of N-vinylcarbazole in polyvinylcarbazole has been reduced to an amount less than 25 ppm by treatment of a solution of the polyvinylcarbazole with a strong acid. The polymer can be recovered in pure form by precipitation of the polymer from solution with a non-solvent.

REFERENCES:
patent: 3999989 (1976-12-01), Ono et al.
patent: 4360644 (1982-11-01), Naarmann et al.

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