METHOD FOR PRODUCING CHLORINATED VINYL CHLORIDE-BASED RESIN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a chlorinated vinyl chloride-based resin simple in removing hydrogen chloride and good in coloring a molded product in a gas-solid catalytic chlorination method excellent in simplicity of after treatments and advantageous in a facility cost. SOLUTION: This method for producing the chlorinated vinyl chloride-based resin is to react a powdery vinyl chloride-based resin containing partially saponified polyvinyl acetate with a steam-containing chlorine gas in a gas-solid contact field, further, treat the obtained chlorinated vinyl chloride-based resin to remove hydrogen chloride by vacuum deaeration treatment and/or air cleaning treatment.