| 摘要 |
<p>A method of removing entrained oxygen in a sealed package containing an oxidisable product comprising (1) applying to a predetermined area of the intended inside surface of the package an oxygen scavenging composition comprising a mixture of a hydrophobic material and a catalyst which has a high activity for combining hydrogen and oxygen and (2) introducing into the package before or after sealing hydrogen and an inert gas or gases including carbon dioxide; the hydrogen being present in the package in sufficient amount to react with the entrained oxygen to form water. The catalyst comprises a platinum group metal or combinations thereof. The hydrophobic material is polytetrafluorethylene, fluorinated ethylene-propylene copolymer, polychlorofluoroethylene, polyvinylidene fluoride or mixtures thereof. The oxygen scavenging composition may contain a water-insoluble adhesive which may be poly(vinylbutyral), nitrocellulose, ethyl cellulose, a polyurethane or a silicone material.</p> |
