申请人:——
公开号:US20040074009A1
公开(公告)日:2004-04-22
The invention provides a process for the production of tanned and optionally retanned leather by treatment of an optionally (pre)tanned animal hide or pelt with an aldehyde-based treatment agent (A), wherein the optionally (pre)tanned animal hide or pelt is treated with
(A) an aldehyde-based treatment agent which may e.g. be
(F) a tanning aldehyde or an aldehyde-based stability and/or fastness improving agent
or (S) an aldehyde-based syntan,
and with
(H) at least one hydrazine compound which is semicarbazide or aminoguanidine or a salt thereof, which may include semicarbazide or aminoguanidine salts (H
S
) of phenolsulphonic acid, naphthalene sulphonic acid or naphtholsulphonic acid,
in any desired sequence,
or is treated with a reaction product (A
H
′) of (A) with (H
S
), or with a reaction product (E
S
) of (S) with (H), or with a mixture of (H) with a reaction product (A
H
) of (A) with (H), or with a mixture of (H
S
) with (A) salts (H
S
), their production and use,
treatment agents for the production of leather, which are mixtures of (H
S
) with (F) or with (S′), or reaction products (E
S
) of (S) with (H), or mixtures of (H) with reaction products (A
H
) of (A) with (H),
the reaction products (E
S
), their compositions, their production and their use.
本发明提供了一种通过使用醛基处理剂(A)处理任选(预)鞣制的动物皮或毛皮来生产鞣革和任选复鞣革的工艺,其中任选(预)鞣制的动物皮或毛皮使用以下处理剂进行处理
(A) 醛基处理剂,例如可以是
(F) 鞣革醛或醛基稳定性和/或牢度改进剂
或 (S) 醛基合成鞣剂、
以及
(H) 至少一种精肼或氨基胍或其盐的肼化合物,其中可包括精肼或氨基胍盐 (H
S
)的酚磺酸、萘磺酸或萘酚磺酸、
以任何所需的顺序、
或用反应产物(A
H
′)与(H
S
的反应产物(E
S
) 的反应产物 (E S),或 (H) 与反应产物 (A
H
) 与 (H) 的反应产物 (A H) 的混合物,或与 (H
S
) 与 (A) 盐的混合物 (H
S
)的混合物,其生产和使用、
生产皮革的处理剂,它是(H
S
)与(F)或与(S′)的混合物,或反应产物(E
S
)与(H)的混合物,或(H)与反应产物(A
H
) 的混合物、
反应产物(E
S
) 、其成分、生产和使用。