ADDITION OF ORGANIC INITIATORS DURING THE PRESSURE DROP IN VINYL CHLORIDE MONOMER POLYMERIZATION REACTIONS

摘要

The invention pertains to a process to polymerize one or more monomers whereinone or more initiators and optionally one or more surfactants are added to apolymerization mixture when the pressure in the polymerization reactor isdropping. This process allows a shorter polymerization time due to a higherpressure drop rate at the end of the polymerization reaction. Moreover, thecooling capacity of the polymerization reactor us used more efficiently.