SUPERIOR STABILIZATION OF POLYPROPYLENE FOR RADIATION STERILIZED MEDICAL DEVICES AND PACKAGES

摘要

Hindered amine light stabilizers (HALS) have been used for decades as some of the principal stabilizers for the protection of polypropylene from the effects of sterilizing doses of high-energy radiation. ExxonMobil Chemical Company has now found proprietary (HALS) additive packages that provide superior stabilization to radiation-sterilized polypropylene. When further improved by blending with small amounts of metallocene-catalyzed, ethylene-based plastomers, these formulations are highly resistant to degradation after irradiation and useful for a broad range of medical device and packaging applications.