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    • 4. 发明授权
    • Process for producing powdered carboxyl-containing polymer
    • 制备含羧基聚合物的方法
    • US5543440A
    • 1996-08-06
    • US378715
    • 1995-01-26
    • Kazuhide HayamaYukio SaitohYasuo KitaniKatsuhiko Yamada
    • Kazuhide HayamaYukio SaitohYasuo KitaniKatsuhiko Yamada
    • C08F6/00B01D9/02C08F6/12C08J3/14C08F20/06
    • C08F6/12C08J3/14
    • A process for producing a powdered carboxyl-containing polymer comprising mixing a solution of a water-insoluble polymer containing a carboxyl group per molecule in a hydrophilic organic solvent (e.g., ethanol) and an aqueous solution of a dispersant comprising a neutralized copolymer of a carboxyl-containing unsaturated monomer and a (meth)acrylic ester to precipitate the water-insoluble polymer. Fine polymer particles free from adhesion or agglomeration are obtained efficiently. Since any residual unreacted carboxyl-containing monomers are dissolved out in water as a precipitating solvent, the resulting powdered polymer has a reduced residual content of the unreacted monomers which may be poisonous and is therefore useful as a base resin of cosmetics or a coating resin for applications involving contact with the skin.
    • 一种制备含羧基聚合物聚合物的方法,包括将每分子含有羧基的水不溶性聚合物的溶液在亲水性有机溶剂(例如乙醇)中和包含羧基中和的共聚物的分散剂水溶液 的不饱和单体和(甲基)丙烯酸酯以沉淀水不溶性聚合物。 有效地获得没有粘附或聚集的细聚合物颗粒。 由于任何残留的未反应的含羧基的单体作为沉淀溶剂溶解在水中,因此所得的粉末状聚合物具有降低的可能是有毒的未反应单体的残留量,因此可用作化妆品的基础树脂或用于 涉及与皮肤接触的应用。