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    • 1. 发明专利
    • Powdering of acrylate polymer
    • 丙烯酸酯聚合物的粉末
    • JPS57117551A
    • 1982-07-22
    • JP246981
    • 1981-01-10
    • Seitetsu Kagaku Co Ltd
    • TAKAGI SHIYUUJINANBA HIROYUKIARAKI HIDEKAZU
    • C08L33/00C08J3/12C08L33/02
    • PURPOSE: To obtain an inexpensive powdery resin having improved water absorption free from decomposition, by putting a predried powdery acrylate polymer in a dryer, preparing the titled polymer from a solution comprising an acrylate polymer without requiring grinding process.
      CONSTITUTION: An acrylate polymer, preferably a polymer obtained by reversed phase emulsion polymerization, etc. from a monomer having a partial neutralization degree of 50W90mol% is blended with powdery acrylate polymer which is predried in a dryer in such a way that a ratio of the polymer to water in the system becomes ≥3/2, and the blend is dried in a dryer at drying temperature ≤150°C preferably in an inert gas atmosphere with stirring. No pretreatment is required at all, nor processes such as cutting, grinding, classification, etc. are needed. When the ratio of the polymer before the start of drying to water is
    • 目的:为了获得具有改善的吸水性分解的廉价的粉末状树脂,通过将预干燥的丙烯酸甲酯聚合物置于干燥器中,从包含丙烯酸酯聚合物的溶液中制备标题聚合物,而不需要研磨过程。 构成:将丙烯酸酯聚合物,优选通过反相乳液聚合等获得的部分中和度为50-90mol%的单体的聚合物与在干燥器中预干燥的粉末状丙烯酸酯聚合物共混, 的体系中的聚合物与水的比例变为> = 3/2,并且在干燥温度<= 150℃的干燥器中,优选在惰性气体气氛中搅拌下将共混物干燥。 根本不需要预处理,也不需要切割,研磨,分级等处理。 当开始干燥之前的聚合物与水的比例<3/2时,不能获得粉末聚合物,并且聚合物变成颗粒状或体积大的。
    • 4. 发明专利
    • Pulverization of polyolefin
    • 聚烯烃的粉化
    • JPS60212430A
    • 1985-10-24
    • JP6963584
    • 1984-04-06
    • Seitetsu Kagaku Co Ltd
    • TAKAGI SHIYUUJIARAKI HIDEKAZUYAMAMOTO TAKUSHINAKAMURA MORIO
    • C08J3/16C08J3/03
    • PURPOSE: Polyolefin is emulsified in an aqueous medium in the presence of ethylene oxide-propylene oxide copolymer and ethylene-acrylate copolymer, then cooled down to give a fine powder of uniform and true sphere.
      CONSTITUTION: Polyolefin is heated under pressure in an aqueous medium in the presence of ethylene-propylene oxide copolymer and ethylene-acrylic acid copolymer and emulsified by melting and stirring, then cooled down lower than the softening point of the polyolefin. The polyolefin used is polyethylene or polypropylene with 20 or more, preferably 50 or more melt index at the emulsification temperature. The amount of the ethylene-acrylate copolymer is 0.5W20%, preferably 1W10% based on the polyolefin. The powder has a shape of true sphere of less than 5μ particle size.
      COPYRIGHT: (C)1985,JPO&Japio
    • 目的:在环氧乙烷 - 环氧丙烷共聚物和乙烯 - 丙烯酸酯共聚物存在下,将聚烯烃在水性介质中乳化,然后冷却,得到均匀真实球体的细粉末。 构成:在乙烯 - 环氧丙烷共聚物和乙烯 - 丙烯酸共聚物的存在下,在含水介质中加压聚烯烃,并通过熔融和搅拌乳化,然后冷却至低于聚烯烃的软化点。 使用的聚烯烃是在乳化温度下具有20以上,优选为50以上的熔融指数的聚乙烯或聚丙烯。 基于聚烯烃,乙烯 - 丙烯酸酯共聚物的量为0.5-20%,优选1-10%。 粉末具有小于5mu粒径的真实球体的形状。