发明名称 |
TARNISH INHIBITING COMPOSITION AND ARTICLE CONTAINING IT |
摘要 |
<p>An effective tarnish inhibiting ("TI") polymer composition including a scavenger for hydrogen sulfide optionally in the presence of an acid gas such as sulfur dioxide, provides excellent protection against tarnishing of the lustrous surfaces of a silver object. When the composition is thermoformed into a box-like container or extruded as film which contains uniformly dispersed solid micron-sized particles of the scavenger chosen from zinc oxide and a silicate of an alkali metal in an amount no greater than 5% by weight of the polymer, it is transparent so that the condition of the stored silver may be assessed. A solid inert adjuvant may be added. All solid particles in the material have a primary particle size smaller than 53 mum which makes it possible to obtain the uniform dispersion. A silver object may be wrapped in the film, or stored in a sealed box so that the solid particles in the polymer are not coated on the surfaces of the silver object.</p> |
申请公布号 |
EP1633908(A1) |
申请公布日期 |
2006.03.15 |
申请号 |
EP20040752414 |
申请日期 |
2004.05.14 |
申请人 |
NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION |
发明人 |
KUBIK, DONALD, ALOYSIUS;VARSHAL, BORIS;LYUBLINSKI, EFIM, YA;NYGAARD, BARBARA, ANN |
分类号 |
B65D81/26;C08K3/22;C08K3/34;C08K5/13;C08K5/3475;C23F15/00;(IPC1-7):C23F15/00 |
主分类号 |
B65D81/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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