Patent ID: 8461272

Claim:
A process for reducing the molecular weight of polypropylene, propylene copolymers or polypropylene blends, wherein at least one azo compound of formula (II) R 1 R 2 R 3 —C—N═N—C—R 1 ′R 2 ″R 3 ″′ (II) is added to the polypropylene, propylene copolymers or polypropylene blend to be degraded and the mixture is heated to a temperature of between 160 and 340° C., wherein two of R 1 , R 2 and R 3 together with the carbon atom form a C 5 -C 8 cycloalkyl and one of R 1 , R 2 and R 3 is hydrogen and R 1 ′, R 2 ″ and R 3 ″′ are each C 1 -C 20 alkyl.