POLYOLEFIN ARTICLES STERILISABLE BY GAMMA-IRRADIATION

摘要

Polyolefin articles, especially polypropylene hypodermic syringes are made more resistant to the yellow discolouration and embrittlement which accompanies sterilisation by gamma-irradiation by the addition to the polyolefin of a heterocyclic hindered amine, e.g. di-(2,2,6,6-tetra-methyl-4-piperidyl)sebacate, to the amount from 0.01 to 2% by weight of the polymer.