申请人:Ciba-Geigy Corporation
公开号:US05055567A1
公开(公告)日:1991-10-08
The dyes according to the invention consist of a chromophore and a radical which, on heating, forms an isocyanate or isothiocyanate group. The latter reacts with a suitable group in the environment. Dyeings of excellent thermomigration fastness are obtained. The disclosed dyes are of the formulae ##STR1## where F is the radical of an azo, anthraquinone or tricyanovinyl dye which is free of water-solubilizing groups, B and B' are each independently of the other a direct bond or a bridge member, selected from the group consisting of a straight-chain or branched alkylene group having 2 to 8 C atoms or one of the following groups ##STR2## where R is hydrogen or C.sub.1 -C.sub.6 alkyl, n is an integer from 1 to 8 and m is an integer from 2 to 4, Z is O or S, V is a group which at a temperature between 180.degree. and 240.degree. C. is eliminated as a radical HV, and V' is a direct bond which is cleaved at a temperature between 180.degree. and 240.degree. C. or is a group which at such temperature turns, by ring opening and cleavage of the bond V'-C, into a group V'H, with the provisos that in the azo dyes the diazo component is not aminobenzisothiazole and the coupling component is not N-(.beta.-phenylureidoethyl)-1-naphthylamine when the diazo component is 2,4-dinitro-6-bromoaniline.
根据该发明,染料由一个色团和一个基团组成,当加热时,形成异氰酸酯或异硫氰酸酯基团。后者与环境中的适当基团发生反应。获得了具有优异热迁移牢固性的染色。所披露的染料为以下公式的其中之一:其中F为不含水溶性基团的偶氮染料、蒽醌染料或三氰乙烯染料的基团,B和B'各自独立于另一个,选自直链或支链烷基基团,其碳原子数为2至8,或以下列基团之一的桥联成员:其中R为氢或C1-C6烷基,n为1至8的整数,m为2至4的整数,Z为O或S,V为在180度至240度C之间温度下作为基团HV消除的基团,V'为在180度至240度C之间温度下断裂的直链或转变为基团V'H的基团,但在偶氮染料中,偶氮组分不是氨基苯并异噻唑,偶联组分不是N-(β-苯基脲基乙基)-1-萘胺,当偶氮组分为2,4-二硝基-6-溴苯胺时。