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    • 8. 发明申请
    • Cross-Linked Polymer Particle and Manufacturing Method Thereof
    • 交联聚合物颗粒及其制造方法
    • US20080154007A1
    • 2008-06-26
    • US11722877
    • 2005-12-28
    • Toshiyuki MoriKoji FujitaKoshin Ushizaki
    • Toshiyuki MoriKoji FujitaKoshin Ushizaki
    • C08F220/10
    • B01J20/26A61M1/3679C08F2/20C08F8/12C08F218/08C08F226/02C08F226/06C08F265/06C08F2222/1013C08F220/28
    • Crosslinked polymer particles that are useful as an adsorbent, or carrier thereof, for treatment of a liquid containing physiological substance and/or cells, etc., such as body fluid, and that is reduced in the activation of complement system and leukocytes; and a process for producing polymer particles being useful as an adsorbent/treating material, or carrier thereof, for treatment of body fluid. In particular, there are provided crosslinked polymer particles comprising as a constituent a polymerization unit containing a vinyl alcohol unit and nitrogen-containing polymerization unit, wherein the content of nitrogen base on the whole weight of grains in the dry state as determined by elementary analysis is in the range of 7.0 to 13.0 weight %, and wherein the surface nitrogen content determined by X-ray photoelectron spectroscopy (XPS) is in the range of 5.0 to 15.0 at %. Further, there are provided crosslinked polymer particles of 50 to 3000 μm volume average particle diameter, of which ≧80 volume % particles have a diameter of 0.8 to 1.2 times the volume average particle diameter, obtained by first forming liquid drops of uniform diameter consisting of a monomer mixture in a dispersion medium and subsequently polymerizing the liquid drops under conditions avoiding cohesion or additional dispersion thereof, optionally further conducting treatment or modification; and is provided a relevant process for producing polymer particles.
    • 可用作吸附剂或其载体的交联聚合物颗粒,用于处理含有生理物质和/或细胞等的液体,例如体液,并且减少补体系统和白细胞的活化; 以及用于制备用作治疗体液的吸附剂/处理材料或其载体的聚合物颗粒的方法。 特别地,提供了包含含有乙烯醇单元和含氮聚合单元的聚合单元作为组分的交联聚合物颗粒,其中通过元素分析确定的干燥状态下的整个颗粒重量中的氮碱含量为 在7.0〜13.0重量%的范围内,通过X射线光电子能谱(XPS)测定的表面氮含量为5.0〜15.0原子%。 此外,提供了50〜3000μm体积平均粒径的交联聚合物粒子,其中> = 80体积%的粒子的直径为体积平均粒径的0.8〜1.2倍,通过首先形成均匀直径的液滴得到, 的分散介质中的单体混合物,随后在避免内聚或其另外分散的条件下聚合液滴,任选进一步进行处理或改性; 并提供了生产聚合物颗粒的相关方法。