Process for increased peroxide efficiency in controlled rheology polypropylene resin

摘要

This invention relates to a peroxide process for preparation of controlled rheology polypropylene resins wherein 2,5-dimethyl-2,5- bis(t- butylperoxy)hexane is the peroxide and the melt flow rate is increased by the presence of a thioester of the general formula ##STR1## wherein n is a whole number of from 6 to 16.