PROCESS FOR PREPARATION OF POLYVINYLCHORIDE

摘要

PURPOSE: Provided is a process for producing a vinyl chloride resin, which apparent specific gravity is large and processability is excellent by maintaining high reaction temperature of the initial step of polymerization for fixed time. CONSTITUTION: The process to be formed 10-30wt% of 300 or less of degree of low polymerization content in degree of polymerization of vinyl chloride resin under a protective colloid supporting agent, a polymerization initiator and a concentration control agent of hydrogen ion is characterized by maintaining the initial reaction temperature of polymerization 1-5deg.C higher than polymerization temperature of vinyl chloride resin and maintaining the later reaction temperature of polymerization 1-5deg.C lower than polymerization temperature of vinyl chloride resin.