MULTISTAGE PREPARATION OF AQUEOUS PRESSURE-SENSITIVE ADHESIVE DISPERSIONS FOR PRODUCING SELF-ADHESIVE ARTICLES
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    发明申请
    MULTISTAGE PREPARATION OF AQUEOUS PRESSURE-SENSITIVE ADHESIVE DISPERSIONS FOR PRODUCING SELF-ADHESIVE ARTICLES 审中-公开
    用于生产自粘物品的水性压敏粘合剂分散体的多级制备

    公开(公告)号:US20120077030A1

    公开(公告)日:2012-03-29

    申请号:US13237621

    申请日:2011-09-20

    摘要: Described is a process for preparing an aqueous pressure-sensitive adhesive dispersion from ethylenically unsaturated, free-radically polymerizable monomers. In a first stage, a first polymer is prepared by free-radical emulsion polymerization. In a second stage, an aqueous polymer dispersion is prepared in the presence of the first polymer, where the glass transition temperature calculated for a polymer prepared from the monomers of the second stage is less than −20° C. The monomers of the first stage comprise monomers with acid groups. The polymerization of the first stage takes place at a low pH of less than 5. The acid groups of the first polymer are neutralized during, or before and during, the polymerization of the second stage to an extent such that the pH of the polymer dispersion at the end of the second stage is greater than 5. The aqueous pressure-sensitive adhesive dispersions can be used for producing self-adhesive articles, especially self-adhesive labels and adhesive tapes.

    摘要翻译: 描述了由烯属不饱和的可自由基聚合的单体制备水性压敏粘合剂分散体的方法。 在第一阶段中,通过自由基乳液聚合制备第一聚合物。 在第二阶段中,在第一聚合物存在下制备聚合物水分散体,其中由第二阶段单体制备的聚合物计算的玻璃化转变温度低于-20℃。第一阶段的单体 包括具有酸基团的单体。 第一阶段的聚合在小于5的低pH下进行。第一聚合物的酸基在第二阶段的聚合过程中或之前和期间被中和至使得聚合物分散体的pH 在第二阶段结束时大于5.水性压敏粘合剂分散体可用于生产自粘物品,特别是自粘标签和胶带。