Patent ID: 7030196

Claim:
A process for reducing the molecular weight of polypropylene, propylene copolymers or polypropylene blends, said process comprising heating the polypropylene, propylene copolymers or polypropylene blends at a temperature between 160° C. and 280° C. in the presence of at least one hydroxylamine ester or a polymer of a hydroxylamine ester containing the group of the formula: where R a ′ is a monoacyl or diacyl radical; R 1 –R 4 are each C 1 –C 6 alkyl; and R 5 and R 6 are each, independently of one another, hydrogen, C 1 –C 6 alkyl or C 6 –C 10 aryl; or R 5 and R 6 are double bonded oxygen.