Abstract:
The invention relates to combinations comprising hydrogen gas or a hydrogen-donating agent and nanoclays comprising cerium or metallic cerium oxide particles. The invention also relates to compositions, nanocomposite materials and packagings comprising said combinations. The invention further relates to methods for producing said combinations and to the use thereof in the packaging of products sensitive to oxygen and oxidation.
Abstract:
The subject of the invention are new forms of nanoiron or zero-valent iron doped with boron, prepared with the method based on the invention, with the ability to fix oxygen in any environment, even an anhydrous one. In the second aspect, the subject of the invention is the method of oxygen scavenging both in a packaging containing water, as well as in an anhydrous environment. In the third aspect, the subject of the invention are nanocomposites containing nanoiron prepared according to the invention, characterised by the ability to fix oxygen in an environment containing water, as well as in an anhydrous environment. In the fourth aspect, the subject of the invention are iron oxygen scavengers in packaging, based on nanoiron or zero-valent iron doped with boron, prepared with the method based on the invention, with the ability to fix oxygen in an environment containing water, as well as in an anhydrous environment.
Abstract:
A polyethylene terephthalate container having a hydrogen generator and catalyst disposed or otherwise incorporated in components of the container. The container further comprises an indicator system or means for use with a hydrogen generator and a catalyst system.
Abstract:
The seal (1) is adapted to be heat bonded to a container for closing an opening of the container. Said seal (1) is a laminate comprising a metallic layer (10), a liner (12) that is permeable to water vapour and to 5 molecular hydrogen, and that can be heat bonded to a container, and at least an active layer (11), that is positioned between the metallic layer (10) and the liner (12), and that is capable of chemically reacting with water and generating molecular hydrogen.
Abstract:
An oxygen-scavenging composition is provided that includes an oxygen-scavenging polymer and a catalyst. The oxygen-scavenging polymer, which in preferred embodiments is suitable for use in packaging articles, includes a base polymer having a backbone, and an unsaturated side chain attached to the backbone. In one embodiment, the unsaturated side chain comprises includes at least one aliphatic carbon-carbon double bond or two or more carbon-carbon double bonds.
Abstract:
Compositions comprising a polymer having less than 5 aliphatic carbon-carbon double bonds per 100 copolymerized monomer units, an oxidizable metal, and a compound selected from the group consisting of ferrous salts having an anion selected from the group consisting of ascorbate, nitrate, citrate, gluconate, lactate and mixtures thereof are effective oxygen-scavenging compositions. The compositions are suitable for use as components of food and pharmaceutical packaging materials. In addition, compositions consisting essentially of a polymer having a less than 5 aliphatic carbon-carbon double bonds per 100 copolymerized monomer units, an oxidizable metal and a ferrous sulfate salt exhibit rapid uptake of oxygen in compositions substantially free of electrolytes having halide anions.