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    • 54. 发明公开
    • NANOPARTIKEL
    • EP1954632A1
    • 2008-08-13
    • EP06818298.9
    • 2006-10-26
    • Merck Patent GmbH
    • KOCH, MatthiasJONSCHKER, Gerhard
    • C01G9/02C08K3/22C08K9/08C08L33/10C09C1/04C09D7/12
    • C09C1/043B82Y30/00C01G9/02C01P2004/64C08K3/22C08K9/08C09D7/62C09D7/67C09D7/70Y10T428/254Y10T428/2927
    • The invention relates to zinc oxide nanoparticles having an average particle size, determined by photon correlation spectroscopy (PCS), in the range of from 3 to 20 nm, the particle surface being modified by at least one copolymer from at least one monomer with hydrophobic groups and at least one monomer with hydrophilic groups, and the nanoparticles being dispersed in an organic solvent. The nanoparticles are is characterized in that they are obtainable by a method whereby in step a) one or more precursors for the nanoparticles are reacted in an alcohol to give the nanoparticles, b) once the absorption edge has achieved the desired value in the UV/VIS specter of the reaction solution, growth of the nanoparticles is terminated by adding at least one copolymer from at least one monomer with hydrophobic groups and at least one monomer with hydrophilic groups, and optionally c) the alcohol from step a) is removed and replaced by another organic solvent. The invention also relates to the particles so obtained and to their use for UV protection in polymers.
    • 本发明涉及具有通过光子相关光谱学(PCS)测定的平均粒度在3至20nm范围内的氧化锌纳米粒子,所述粒子表面通过至少一种具有疏水基团的单体 和至少一种具有亲水基团的单体,并且纳米粒子分散在有机溶剂中。 纳米颗粒的特征在于它们可以通过以下方法获得,其中在步骤a)中使纳米颗粒的一种或多种前体在醇中反应以产生纳米颗粒,b)一旦吸收边缘已经在UV / 通过添加至少一种具有疏水性基团的单体和至少一种具有亲水性基团的单体的共聚物来终止纳米颗粒的生长,并且任选地c)将步骤a)的醇除去并替换 通过另一种有机溶剂。 本发明还涉及如此获得的颗粒以及它们在聚合物中用于紫外线防护的用途。