Redispersible epoxy powder by interfacial reaction
    49.
    发明公开
    Redispersible epoxy powder by interfacial reaction 有权
    Redispergierbares Epoxypulver durchGrenzflächenreaktion

    公开(公告)号:EP2537896A1

    公开(公告)日:2012-12-26

    申请号:EP12169605.8

    申请日:2012-05-25

    IPC分类号: C08L63/00 C04B16/04 C04B24/28

    摘要: A water redispersible polymer powder is produced by drying an aqueous mixture of a thermosettable epoxy resin having a glass transition temperature (Tg) of less than 50 °C, a colloidal stabilizer capable of dispersing the epoxy resin at a temperature above the Tg of the epoxy resin, preferably a polyvinyl alcohol, in an amount of the colloidal stabilizer of at least 2% by weight, and an interfacial crosslinking agent, such as a water soluble amino acid or a water soluble polyfunctional acid, such as polyacrylic acid, in an amount of at least 0.1% by weight, each based upon the weight of the thermosettable epoxy resin. The RDP may optionally include a hardener or curing agent, and may be hardened, cured, or crosslinked by cement ingredients when admixed with water. The water redispersible polymer powder exhibits unexpectedly superior redispersibility and good stability in cementitious formulations.

    摘要翻译: 通过干燥玻璃化转变温度(Tg)小于50℃的可热固化环氧树脂的水性混合物,能够在环氧树脂的Tg以上的温度下分散环氧树脂的胶体稳定剂来制备水可再分散聚合物粉末 树脂,优选聚乙烯醇,胶体稳定剂的量为至少2重量%,以及界面交联剂,例如水溶性氨基酸或水溶性多官能酸如聚丙烯酸,其量为 至少0.1重量%,各自基于可热固化环氧树脂的重量。 RDP可以任选地包括硬化剂或固化剂,并且当与水混合时可以通过水泥成分硬化,固化或交联。 水可再分散聚合物粉末显示出意想不到的优异的再分散性和在水泥质制剂中的良好稳定性。