Patent ID: 6858662

Claim:
A method for stabilizing a thermoplastic polyolefin comprising adding to said polyolefin a non-xenoestrogenic stabilizer of the structure wherein y is an integer of from 6 to 20 and said polyolefin is elected from the group consisting of polyethylene, polypropylene, polyisobutylene, polymethylbutene-1, polymethylpentene-1, polybutene-1, polystyrene, polyisobutylene, ethylene-propylene copolymers having at least a majority of propylene, propylene-butene-1 copolymers, propylene-isobutylene copolymers, and blends of a majority of polypropylene with a minority of polyethylene, propylene, and polybutene-1, and blends of propylene and polyisobutylene.