Process for the removal of N-vinylcarbazole from poly(N-vinylcarbazole)
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United States of America Patent
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Dec 29, 1992
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N/A
app pub date -
Jun 4, 1990
filing date -
Jun 4, 1990
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Expired
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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.
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