Process and auxiliaries for the treatment of organically tanned leather
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United States of America Patent
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Issued Date -
Oct 20, 2005
app pub date -
Dec 28, 2004
filing date -
Jun 28, 2002
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Abandoned
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Abstract
Organic polyamines having at least three amino groups in the molecule or mixtures, or reaction products (1) of such polyamines with (2) at least one alkylsilane having organic oxy radicals bonded to the silicon atom and a functional group bonded to the alkyl group, so that said reaction products have at least two free amino groups in the molecule, said functional group forming a covalently bonded bridging group with an amino group of the polyamine, are suitable as cationic auxiliaries in the finishing of leathers and skins, pretanned with dialdehydes and retanned with organic tanning agents, with anionic auxiliaries, such as, for example, anionic dyes.
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