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    • 92. 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。
    • 97. 发明申请
    • Redox polymerization of vinyl aromatic monomers by photosynthesis
    • 通过光合作用进行乙烯基芳族单体的氧化还原聚合
    • US20070032562A1
    • 2007-02-08
    • US11198542
    • 2005-08-04
    • Jose SosaJay Reimers
    • Jose SosaJay Reimers
    • C08F2/50
    • C08F2/48C08F112/08C08F279/02C08F212/08
    • A method for the production of a vinyl aromatic polymer through the use of a supported light-induced photoreductant. A reactor is provided which contains a catalyst bed comprising a light-induced photoreductant component supported on a particulate substrate forming a permeable catalyst bed. A reaction stream comprising a vinyl aromatic monomer, a soluble reductant, and a transition metal salt is introduced into the reactor and passed through the catalyst bed. In addition, a gaseous oxidizing agent is introduced into the reactor and flowed through the catalyst bed and into contact with the reaction stream. The catalyst bed is irradiated with electromagnetic radiation in the ultraviolet or visible light range at an intensity sufficient to activate the photoreductant component and produce a free radical to initiate polymerization of the vinyl aromatic monomer to form a corresponding vinyl aromatic polymer. The vinyl aromatic polymer is then recovered from the reactor. The photoreductant component is a photoreductant dye, such as a group consisting of acridine, methylene blue, rose bengal, tetraphenylporphine, A protoporphyrin, A phthalocyanine and eosin-y and erythrosin-b. The transition metal salt may be an iron, cobalt or manganese salt and the soluble reductant is selected from the group consisting of diethanolamine, thiodiethanol, triethanolamine, benzoin, ascorbic acid, ester, glyoxal trimer and toluene sulfinic acid.
    • 一种通过使用支撑的光诱导的光致感光体制备乙烯基芳族聚合物的方法。 提供了一种反应器,其包含催化剂床,所述催化剂床包含负载在形成可渗透催化剂床的颗粒基质上的光诱导的光致反应物组分。 将包含乙烯基芳族单体,可溶还原剂和过渡金属盐的反应物流引入反应器并通过催化剂床。 另外,将气态氧化剂引入反应器中并流过催化剂床并与反应物流接触。 催化剂床在紫外线或可见光范围内用电磁辐射照射,其强度足以激活光致感光体组分并产生自由基以引发乙烯基芳族单体的聚合以形成相应的乙烯基芳族聚合物。 然后从反应器中回收乙烯基芳族聚合物。 光致感光成分是光致感染染料,如吖啶,亚甲基蓝,玫瑰红,四苯基卟吩,原卟啉,A酞菁,曙红,红蛋白b组成的组。 过渡金属盐可以是铁,钴或锰盐,可溶性还原剂选自二乙醇胺,硫代二乙醇,三乙醇胺,苯偶姻,抗坏血酸,酯,乙二醛三聚体和甲苯亚磺酸。