Compositions for shortstopping free radical emulsion polymerizations and stabilizing latices made therefrom
    1.
    发明授权
    Compositions for shortstopping free radical emulsion polymerizations and stabilizing latices made therefrom 失效
    用于快速自由基乳液聚合和由其制备的稳定胶乳的组合物

    公开(公告)号:US06723255B2

    公开(公告)日:2004-04-20

    申请号:US09784884

    申请日:2001-02-16

    IPC分类号: C09K300

    CPC分类号: C08F2/42 C08F36/04

    摘要: Disclosed are compositions for shortstopping free radical emulsion polymerizations and stabilizing polymers produced from the corresponding emulsion processes. Such compositions include at least one hydrophillic radical scavenger (i.e, shortstopper) and at least one hydrophobic radical scavenger. The compositions are preferably targeted for applications in the emulsion processes of rubber latexes. These compositions exhibit excellent performance not only as shortstoppers of free radical emulsion polymerizations but also as stabilizers of the corresponding polymers. Thus, the compositions prevent additional polymerization in the particles without requiring additional stabilizer even after such polymers are steam stripped. They do so without the use of chemicals which carry a high safety, health, or environmental risk.

    摘要翻译: 公开了用于快速自由基乳液聚合和由相应的乳液方法制备的稳定聚合物的组合物。 这样的组合物包括至少一种亲水基清除剂(即缓冲剂)和至少一种疏水性自由基清除剂。 组合物优选用于橡胶胶乳乳液工艺中的应用。 这些组合物不仅具有优异的性能,不仅作为自由基乳液聚合的快速消泡剂,而且作为相应聚合物的稳定剂。 因此,即使在蒸汽汽提这些聚合物之后,组合物也防止了颗粒中的额外的聚合,而不需要额外的稳定剂。 他们不使用具有高安全性,健康或环境风险的化学物质。

    Nitrosamine-inhibiting compositions for shortstopping of free radical emulsion polymerizations
    2.
    发明授权
    Nitrosamine-inhibiting compositions for shortstopping of free radical emulsion polymerizations 失效
    用于缓冲自由基乳液聚合的亚硝胺抑制组合物

    公开(公告)号:US06495065B1

    公开(公告)日:2002-12-17

    申请号:US09631756

    申请日:2000-08-03

    IPC分类号: C09K300

    CPC分类号: C08F2/42 C08F2/22 C08F236/04

    摘要: The present invention is a composition for and a method of shortstopping free radical emulsion polymerizations that inhibits the formation of nitrosamines. The composition comprised nitrosamine inhibitors in combination with conventional alkylhydroxylamine shortstoppers. Such nitrosamine inhibitors are based on primary amines, amine-containing polymers, pyrroles, hydroquinones, certain phenols, ascorbic acid, and other well-known nitrosation inhibitors; they may be used individually or as a blend. The compositions are targeted for applications in the emulsion processes for producing rubber latexes and the preparation of rubber products thereafter.

    摘要翻译: 本发明是用于抑制自由基乳液聚合的抑制亚硝胺形成的组合物和方法。 组合物与常规的烷基羟胺快速反应器组合包含亚硝胺抑制剂。 这样的亚硝胺抑制剂基于伯胺,含胺聚合物,吡咯,氢醌,某些酚,抗坏血酸和其他众所周知的亚硝化抑制剂; 它们可以单独使用或作为混合物使用。 该组合物的目标是在用于生产橡胶胶乳的乳液方法中的应用和其后的橡胶产品的制备。