Process for the removal of N-vinylcarbazole from poly(N-vinylcarbazole)
US5175248A · kind A · utility
2Cited by
2References
15Claims
0Family size
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Inventors
Key dates
| Filing date | Jun 4, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Jun 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.