Patent ID: 9212236
Filing Date: 2015-12-15
Classification: C08F,D01F

Abstract:
1. A method of preparing a polyacrylonitrile-based polymer solution, comprising subjecting acrylonitrile to a polymerization to prepare a polyacrylonitrile-based polymer; and subjecting the produced polyacrylonitrile-based polymer to a neutralization using at lest one compound selected from the group consisting of an ammonium hydroxide substituted with C1˜C6 alkyl or C6˜C21 aromatic alkyl, an amine substituted with C1˜C6 alkyl or C6˜C21 aromatic alkyl, and a melamine unsubstituted or substituted with C1˜C6 alkyl as a polymerization terminator in presence of a solvent to produce a solution containing a polyacrylonitrile-based polymer which is in salt form with ammonium ion substituted with C1-C6 alkyl or C6-C21 aromatic alkyl or in salt form of melamine.