Oxygen scavenging composition for low temperature use
    6.
    发明授权
    Oxygen scavenging composition for low temperature use 失效
    氧气清除组合物用于低温使用

    公开(公告)号:US5648020A

    公开(公告)日:1997-07-15

    申请号:US569373

    申请日:1995-12-06

    摘要: Improved compositions for scavenging oxygen are disclosed. These materials, characterized by low degree crystallinity and a glass transition temperature of lower than -15.degree. C., have high oxygen scavenging rates at low temperatures. The composition comprises an ethylenically unsaturated hydrocarbon and a transition metal salt catalyst and can be incorporated into various types of layers. It is preferable that the composition be incorporated into layers of multilayered articles used for packaging oxygen-sensitive products such as food products.

    摘要翻译: 公开了用于清除氧气的改进的组合物。 这些以低结晶度和低于-15℃的玻璃化转变温度为特征的材料在低温下具有高氧清除率。 该组合物包含烯键式不饱和烃和过渡金属盐催化剂,并且可以并入各种类型的层中。 优选地,将组合物结合到用于包装氧敏感产品如食品的多层制品层中。

    UV-C sensitive composition and dosimeter
    9.
    发明授权
    UV-C sensitive composition and dosimeter 失效
    UV-C敏感组合物和剂量计

    公开(公告)号:US07589331B2

    公开(公告)日:2009-09-15

    申请号:US11803303

    申请日:2007-05-14

    IPC分类号: G01J1/38

    摘要: The invention is a UV sensitive composition that undergoes a color change upon exposure to a predetermined dosage of UV-C radiation. The UV-C sensitive composition comprises a halogenated polymer, such as polyvinylidene chloride, that produces an acid upon exposure to UV radiation, and a pH sensitive dye. Upon exposure to UV-C radiation, the halogenated polymer undergoes degradation and produces HCl. The pH sensitive dye changes color as a result in an increase in HCl in the system. The composition may also include an acid scavenging composition and/or a diluent to control the amount of HCl produced in the system. The amount of HCl liberated from UV-C exposure may be selectively controlled so that a color change may be produced at a desired UV-C dosage. In some embodiments, the composition may be used to indicate a UV-C dosage from about 100 to 1600 mJ/cm2.

    摘要翻译: 本发明是在暴露于预定剂量的UV-C辐射时经历变色的UV敏感组合物。 UV-C敏感组合物包含在暴露于UV辐射时产生酸的卤代聚合物,例如聚偏二氯乙烯和pH敏感染料。 当暴露于UV-C辐射时,卤化聚合物发生降解并产生HCl。 pH敏感染料会改变颜色,导致系统中HCl的增加。 组合物还可以包括酸清除组合物和/或稀释剂以控制系统中产生的HCl的量。 可以选择性地控制从UV-C曝光释放的HCl的量,使得可以在期望的UV-C剂量下产生颜色变化。 在一些实施方案中,组合物可用于表示约100至1600mJ / cm 2的UV-C剂量。