N-VINYLCARBAZOLE REMOVAL FROM POLYVINYLCARBAZOLE USING ALUMINA
Original Publication Date: 1981-Feb-28
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
The monomeric component N-vinylcarbatole is present to some degree in poly-vinylcarbazole. Since this material can cause some dermatitis conditions in certain individuals, there is an interest in removing this monomer from the polymer. The process depends upon the chemical conversion of N-vinylcarbazole to carbatole and possibly oligimers of polyvinylcarbazole at the surface of alumina. For example, 20 grams of poly-N-vinylcarbazole is placed in 500 milliliters of hot toluene plus 40 grams of alumina. After three hours, the alumina is removed by filtration. This completely removes the monomeric N-vinylcarbazole from the polymer.