The present invention relates to particles of naphthalocyanine and phthalocyanine chromophores of formula (I) having a number average particle size in the range of from 10 nm to 80 nm with standard deviation being less than 40 nm, their use as almost colourless IR absorbers, for optical filter applications, especially for plasma display panels, or for laser welding of plastics. The compounds may be used in compositions for inks, paints and plastics, especially in a wide variety of printing systems and are particularly well-suited for security applications.
本发明涉及公式(I)的
萘酞菁和
酞菁色团的颗粒,其平均粒径在10纳米至80纳米范围内,标准偏差小于40纳米,它们可用作几乎无色的红外吸收剂,用于光学滤波器应用,特别是等离子显示面板或塑料激光焊接,这些化合物可以用于油墨、涂料和塑料的组合物中,特别是在各种印刷系统中,非常适合安全应用。