Process of making hollow polymer latex particles
    2.
    发明授权
    Process of making hollow polymer latex particles 失效
    制造中空聚合物胶乳颗粒的方法

    公开(公告)号:US5157084A

    公开(公告)日:1992-10-20

    申请号:US597263

    申请日:1990-10-12

    摘要: This invention relates to a process of making hollow polymer latex particles without the use of acid in the swellable polymer core; the latexes are useful as opacifying plastic pigments for various coatings and particularly as gloss-enhancing plastic pigments for paper and paperboard coatings. Known methods for preparing hollow latexes require cores containing acid or acidic monomers to enable swelling to core at room temperature. The existence of acid in the polymer disadvantageously increases the polymer's affinity to water. Applicants have discovered that non-carboxylated latexes having a variety of T.sub.g 's will also swell at higher temperatures. The mechanism entails the use of acrylate and methacrylate ester monomers which are hydrolyzable and swellable at higher temperatures in alkaline environments. Such mechanisms for making swollen latexes provide for a wide variety of potential end-uses as well as a wide variety of potential latexes.

    摘要翻译: 本发明涉及在可溶胀聚合物芯中不使用酸制备中空聚合物胶乳颗粒的方法; 胶乳可用作各种涂料的不透明塑料颜料,特别是用作纸和纸板涂料的光泽增强塑料颜料。 用于制备中空胶乳的已知方法需要含有酸或酸性单体的核,以使其在室温下能够溶胀到核心。 聚合物中酸的存在不利地增加了聚合物对水的亲和力。 申请人已经发现,具有各种Tg的非羧化胶乳也将在更高的温度下膨胀。 该机理需要使用在碱性环境中在较高温度下可水解和溶胀的丙烯酸酯和甲基丙烯酸酯单体。 用于制备肿胀胶乳的这种机制提供了各种潜在的最终用途以及各种潜在的胶乳。

    Hollow polymer latex particles
    4.
    发明授权
    Hollow polymer latex particles 失效
    中空聚合物胶乳颗粒

    公开(公告)号:US5521253A

    公开(公告)日:1996-05-28

    申请号:US374541

    申请日:1995-01-19

    摘要: This invention relates to polymer particles that are acid-free in the swellable polymer core and to hollow polymer particles derived therefrom, and to a process for the production of these particles. The acid-free core advantageously decreases the polymer particle's affinity to water. Applicants have discovered that non-carboxylated latexes having a variety of Tg's will swell at temperatures higher than the Tg of the polymer. These latex particles are useful as opacifying plastic pigments for various coatings and particularly as gloss-enhancing plastic pigments for paper and paperboard coatings. Preparation of the hollow polymer particle comprises the use of (meth)acrylate ester monomers, vinyl esters of carboxylic acids or a mixture thereof which are hydrolyzable and swellable at higher temperatures in alkaline environments. The particles may be encapsulated with a hard shell.

    摘要翻译: PCT No.PCT / US92 / 07025 Sec。 371日期1995年1月19日 102(e)1995年1月19日的PCT日期1992年8月19日PCT。本发明涉及在可溶胀聚合物芯中无酸的聚合物颗粒和由其衍生的中空聚合物颗粒,以及生产 这些颗粒。 无酸芯有利地降低聚合物颗粒对水的亲和力。 申请人已经发现,具有多种Tg的非羧化胶乳将在高于聚合物的Tg的温度下膨胀。 这些胶乳颗粒可用作各种涂料的不透明塑料颜料,特别是用作纸和纸板涂料的光泽增强塑料颜料。 中空聚合物颗粒的制备包括使用在碱性环境中可在较高温度下可水解和溶胀的(甲基)丙烯酸酯单体,羧酸乙烯基酯或其混合物。 颗粒可以用硬壳包封。