CONTINUOUS PROCESS INCLUDING RECYCLE STREAM TREATMENT FOR THE PRODUCTION OF HIGH IMPACT POLYSTYRENE

摘要

A continuous flow process for the production of high impact polystyrene utilizing a recycle stream of volatile materials and utilizing a non-volatile antioxidant: wherein specific types of polymerization inhibiting impurities are removed from A recycle stream prior to feeding or introducing the recycle stream into a styrene polymerization zone. Preferably, the process further comprises the step of monitoring the acidity of the recycle stream and using a free radical initiator which decomposes to form only non-acid by-products.