申请人:YORKSHIRE CHEMICALS PLC.
公开号:EP1223199A1
公开(公告)日:2002-07-17
The invention provides a dye composition for dyeing fibres comprising (a) an azo dye of formula (II) or a slat thereof, and (b) an azo dye of formula (III) or a salt thereof. The invention provides navy and black dye compositions, especially suitable for dyeing secondary cellulose acetate fibres, with superior fastness properties than known navy/black dyes. Preferably, the α-crystal form of dye (III) is used, which has greater solubility and achieves quicker dyeing than the commonly-used β and γ forms of (III) when dyeing cellulose acetate at 60-95°C. A new method of making the α form is disclosed.
本发明提供了一种用于纤维染色的染料组合物,该组合物包含 (a) 式 (II) 偶氮染料或其板条,以及 (b) 式 (III) 偶氮染料或其盐。本发明提供了藏青色和黑色染料组合物,特别适用于醋酸纤维素仲丝体纤维的染色,其牢度特性优于已知的藏青色/黑色染料。最好使用染料(III)的α-结晶形式,与常用的(III)的β和γ形式相比,(III)在60-95℃下对醋酸纤维素染色时,溶解度更大,染色更快。本文还公开了一种制造 α 形式的新方法。