发明名称 |
DYED LEATHER AND METHOD FOR DYEING TANNED LEATHER |
摘要 |
Tanned leather is (a) pretreated in an aqueous and alkaline medium either with ammonia, primary amines or a mixture of ammonia and primary amines and then with a polyfunctional organic compound containing at least one aldehyde group as a functional group, or (b) in an aqueous and acidic medium with a polyfunctional organic compound and then ammonia, primary amines or a mixture of ammonia and primary amines, and (c) then dyed in an aqueous and alkaline medium with a water-soluble dye containing at least one functional group which is capable of reacting with one of the functional groups of the organic compound, forming a covalent bond. A tanned and dyed leather is obtainable with a high colour intensity, outstanding wet fastness and excellent grain tightness, wherein the dye is permanently and covalently bonded to the leather via a bridging group, preferably in the region of the surface, and the bridging group is essentially bonded to the leather via -N=CH- groups.
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申请公布号 |
WO0220897(A1) |
申请公布日期 |
2002.03.14 |
申请号 |
WO2001EP09840 |
申请日期 |
2001.08.27 |
申请人 |
TFL LEDERTECHNIK GMBH & CO. KG;MCHUGH, JON, LOUIS;FENNEN, JENS;CAMPBELL, THOMAS, PAGE |
发明人 |
MCHUGH, JON, LOUIS;FENNEN, JENS;CAMPBELL, THOMAS, PAGE |
分类号 |
C14C9/02;D06P1/00;D06P1/645;D06P1/651;D06P1/673;D06P3/32;(IPC1-7):D06P3/32 |
主分类号 |
C14C9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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