申请人:UNITAN S.A.I.C.A.
公开号:EP0543689A1
公开(公告)日:1993-05-26
The invention concerns compositions to simultaneously tan and dye hides, characterized by the fact that they contain at least one tanning compound able to form chromophore groups consisting of at least one member of the group including :
natural pyrocatechic derivatives of quebracho, mimosa, acacia and their tannic acids ;
natural pyrogallic derivatives of tara, carob and their tannic acids ;
naphthalene sulphonic acid condensed with formaldehyde ;
naphthalene sulphonic acid ;
phenolsulphonic acid ;
phenolsulphonic acid condensed with formaldehyde ;
gallic acid ;
and at least one coupler able to develop with the chromophore groups of the compound tanning the final colour, this coupler belonging to the group including :
triphenyl-methano-sulphonic acid ;
aniline ;
p-amino-aceto-aniline ;
urea-1 acid ;
p-amino-salicylic acid ;
di-nitro-styrene-sulphonic acid ;
p-sulphanilic acid ;
p-nitro-aniline
phenolsulphonic acid ;
benzidine H ;
benzaldehyde ;
N,N dimethyl-aniline ;
o-dianisidine Ch-CH.
本发明涉及同时对皮革进行鞣制和染色的组合物,其特征在于它们含有至少一种能够形成发色团的鞣制化合物,该发色团由以下组中的至少一种成员组成::
坚木、含羞草、金合欢及其单宁酸的天然焦碳酸衍生物;
塔拉、角豆树及其单宁酸的天然焦碳衍生物;
萘磺酸与甲醛的缩合物 ;
萘磺酸 ;
酚磺酸
甲醛缩合酚磺酸 ;
没食子酸
以及至少一种能够与鞣革化合物的发色团基团形成最终颜色的耦合剂,这种耦合剂属于以下组别:............:
三苯基甲磺酸 ;
苯胺
对氨基乙酰苯胺 ;
脲-1 酸
对氨基水杨酸 ;
二硝基苯乙烯磺酸 ;
对氨基苯磺酸
对硝基苯胺
苯酚磺酸 ;
联苯胺 H ;
苯甲醛
N,N-二甲基苯胺 ;
邻二苯胺 Ch-CH