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    • 94. 发明申请
    • METHOD FOR MANUFACTURING COAGULATED PARTICLES FROM LATEX PREPARED BY EMULSION POLYMERIZATION
    • 通过乳化聚合制备乳酸凝胶颗粒的方法
    • US20070219294A1
    • 2007-09-20
    • US10598653
    • 2004-12-27
    • Takashi Ueda
    • Takashi Ueda
    • C08J3/16
    • C08F2/22C08F2/30C08F220/18C08F220/40C08F257/02C08F265/04C08F279/02C08F279/04C08L51/04C08L55/02C08L2666/02
    • A method for manufacturing coagulated particles from a latex prepared by emulsion polymerization has been eagerly demanded, which provides coagulated particles having a low content of fine powder and a low water content, and makes possible a granulating operation in the vicinity of the softening temperature of the polymer. A method for manufacturing coagulated particles from a latex prepared by emulsion polymerization is provided which comprises step (A) of adjusting the temperature of a latex prepared by emulsion polymerization within the range of Tm±15° C. wherein Tm represents the softening temperature of the polymer in the latex; step (B) of adding polyethylene oxide; step (C) of adding a coagulant to cause phase separation of a polymer component from an aqueous phase; step (D) of further adding a coagulant to form an aqueous suspension containing coagulated polymer particles having a volume-average particle size of 50 to 500 μm; and step (E) of adjusting the temperature of the suspension to Tm or more.
    • 迫切需要通过乳液聚合制备的胶乳制造凝固颗粒的方法,其提供具有低含量的细粉末和低含水量的凝结颗粒,并且可以在软化温度附近进行造粒操作 聚合物。 提供了通过乳液聚合制备的胶乳制造凝结颗粒的方法,其包括在Tm±15℃的范围内调节通过乳液聚合制备的胶乳的温度的步骤(A)。其中Tm表示 胶乳中的聚合物; 步骤(B)加入聚环氧乙烷; 加入凝结剂以使聚合物组分与水相相分离的步骤(C); 步骤(D)进一步添加凝结剂以形成含有体积平均粒度为50-500μm的凝结聚合物颗粒的水性悬浮液; 和将悬浮液的温度调节至Tm以上的步骤(E)。
    • 100. 发明申请
    • METHOD FOR PREPARING GRAFT RUBBER LATEX HAVING LOW RESIDUAL MONOMER CONTENT
    • 用于制备具有低残留单体含量的粗纱橡胶的方法
    • US20070123657A1
    • 2007-05-31
    • US11538205
    • 2006-10-03
    • Joo-byung CHAIChan-hong LEEKeun-hoon YOOJin-hyoung LEEJae-hwan JUNG
    • Joo-byung CHAIChan-hong LEEKeun-hoon YOOJin-hyoung LEEJae-hwan JUNG
    • C08F297/02
    • C08F279/02
    • The present invention relates to a method for preparing a graft rubber latex having a low residual monomer content, and more precisely, a method for preparing a graft rubber latex having a high rubber content, which is characterized by graft-copolymerization of a mixture of a rubber latex having a gel content of at least 95% and an average particle diameter of 2,500˜5000 Å, a monomer mixture comprising one or more compounds selected from a group consisting of aromatic vinyl compound, vinyl cyan compound and acrylate compound, and small particle size latex produced by emulsion polymerization. The method of the present invention has the advantages of speedy processes with excellent latex stability and at the same time reducing residual monomer content in the latex upon completion of the polymerization, improving perceived quality of the product and increasing yield.
    • 本发明涉及一种制备具有低残留单体含量的接枝橡胶胶乳的方法,更确切地说,涉及一种制备橡胶含量高的接枝橡胶胶乳的方法,其特征在于接枝共聚 凝胶含量为至少95%,平均粒径为2,500〜5000的橡胶胶乳,包含一种或多种选自芳族乙烯基化合物,乙烯基氰化合物和丙烯酸酯化合物的化合物的单体混合物和小颗粒 通过乳液聚合生产的胶乳。 本发明的方法具有快速工艺的优点,其具有优异的胶乳稳定性,同时在聚合完成后减少胶乳中的残留单体含量,提高产品的感知质量和提高产率。