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    • 3. 发明申请
    • Aqueous emulsion polymers comprising stable epoxy groups
    • 包含稳定的环氧基团的水乳液聚合物
    • US20070100074A1
    • 2007-05-03
    • US11583303
    • 2006-10-19
    • Wayne DevonportRalph Even
    • Wayne DevonportRalph Even
    • C08L63/00B32B27/38
    • C09D133/02C08L33/02C08L33/066C08L33/068C09D133/068C09D133/08C09D151/003C09D163/00C08L2666/04
    • According to the present invention, aqueous multi-stage polymer dispersions comprising an acid-functional first polymer and an epoxy-functional second polymer, wherein 90 mole % or more of the said epoxy groups, based on the moles of epoxy groups in the monomer mixture used to form the second polymer, are retained in the aqueous dispersion after said dispersion is stored in a sealed container for 10 days at 60° C. Further, methods of making the aqueous multistage polymer dispersion comprise polymerizing the monomers used to make the second polymer in the presence of an aqueous dispersion of the first polymer. Preferably, the second polymer is formed in the presence of 0.3 wt. % or less, based on the total weight of the first polymer and the ingredients to form the second polymer, of one or more strong acid surfactant, and 3) 0.1 wt. % or less, based on the total weight of the first polymer and the ingredients to form the second polymer, of one or more initiator that contains strong acid groups or generates strong acid groups under the conditions of aqueous emulsion polymerization. The aqueous dispersions provide non-toxic, odor free storage stable coating compositions that form coatings having excellent film toughness and hardness.
    • 根据本发明,包含酸官能的第一聚合物和环氧官能的第二聚合物的水性多阶段聚合物分散体,其中基于单体混合物中的环氧基的摩尔数,所述环氧基的90摩尔%或更多 用于形成第二聚合物的物质在所述分散体在60℃下储存在密封容器中10天后保留在水性分散体中。此外,制备水性多级聚合物分散体的方法包括聚合用于制备第二聚合物的单体 在第一聚合物的水分散体存在下进行。 优选地,第二聚合物在0.3wt。 %或更少,基于第一聚合物的总重量和形成第二聚合物的成分,一种或多种强酸表面活性剂,和3)0.1wt。 基于第一聚合物的总重量和形成第二聚合物的成分的一种或多种引发剂,其含有强酸基团或在水乳液聚合的条件下产生强酸基团。 水分散体提供无毒,无气味的储存稳定的涂料组合物,其形成具有优异的膜韧性和硬度的涂料。