申请人:Océ-Technologies B.V.
公开号:EP1067439A1
公开(公告)日:2001-01-10
A coloured powder, particularly a toner powder, containing thermoplastic resin, fluorescent dye, possibly magnetically attractable material and a compound of a metal of which an anion is diamagnetic. The metal is, for example, calcium, silver, sodium, potassium, barium, aluminium, zirconium, zinc or magnesium. The metal compound is preferably a metal salt and is preferably present in the coloured powder in a quantity of between 2 and 15% by weight The metal compound must be dissolved in the thermoplastic resin (or mixture of thermoplastic resins) or be very finely distributed therein. Metal salts, particularly zinc and magnesium salts, of aliphatic, possibly branched carboxylic acids, particularly carboxylic acids having a hydrocarbon radical with at least six carbon atoms, are preferred.
Addition of the metal compound reduces extinction of the fluorescence of the fluorescent dye.
一种彩色粉末,特别是调色剂粉末,含有热塑性树脂、荧光染料、可能具有磁性的材料和一种阴离子具有二磁性的金属化合物。例如,金属是钙、银、钠、钾、钡、铝、锆、锌或镁。金属化合物最好是金属盐,在有色粉末中的含量最好在 2%到 15%(按重量计)之间。金属盐,尤其是锌盐和镁盐,最好是脂肪族,可能是支链羧酸,尤其是具有至少六个碳原子的烃基的羧酸。
添加金属化合物可减少荧光染料的荧光消光。