To provide an acrylonitrile polymer particle which is excellent in dispersibility and solubility to a solvent, and can improve the stability of spinning process, and a method for producing the same.
The method for producing a polyacrylonitrile polymer particle by redox aqueous precipitation polymerization includes: continuously supplying a monomer including 100 pts.mass of acrylonitrile and 1-5 pts.mass of hydroxyalkyl methacrylate and/or hydroxyalkyl acrylate, an initiator including ammonium bisulfite and ammonium persulfate in a mole ratio of 0.5-3.8, and water to a reactor so that the mass ratio of water/monomer is 1.5-2.6, and setting stirring power in the reactor to a range of 2.4-5.3 kW/m3. The polyacrylonitrile polymer particle obtained by the method has polymer particle bulk specific gravity of 0.33-0.50 g/cm3 and a volume-average particle size of 15-30 μm.
| WO/2010/096867 | POLYMER PARTICLES |
| WO/2014/121852 | PLASTICIZER-FREE ARTICLE MADE OF PVC GRAFT COPOLYMERS |
| JPH0356512 | PRODUCTION OF CHLOROTRIFLUOROETHYLENE-BASED POLYMER |
NIIMEN YUSUKE
HIROTA NORIFUMI
TAKEUCHI SHUSUKE
Ishibashi Masayuki
Masaaki Ogata