LEATHER POST-TANNING PROCESS

Japanese Patent JPS59125000

A

The invention relates to a process for retanning leather with polymers based on acrylic and/or methacrylic acid in an aqueous liquor with or without further auxiliaries and tanning-active substances by letting water-soluble polymers P act on the leather in an aqueous liquor. The polymers P contain at least 10% by weight, based on the total polymer, of structural units A < IMAGE > where R is hydrogen or methyl and Z<+> is an ammonium cation < IMAGE > which is in equilibrium with protons or other cations present and in which R1, R2 and R3 are independently of one another hydrogen or an alkyl radical of 1 to 6 carbon atoms which may be substituted by a hydroxyl group or by an optionally alkyl-substituted amino group, subject to the proviso that R1, R2 and R3 are not all hydrogen, and 0 to 90% by weight, based on the total polymer P, of structural units B < IMAGE > where R' is hydrogen or methyl, and 0 to 50% by weight of other structural units formed from monomers C which are copolymerisable with A and optionally B and end groups corresponding to the structural units.

JP2908452	INDUSTRIAL APPLICABILITY The retanning method, the retanned leather obtained by the method, and the copolymer used in the method.
WO/1999/053104	POLYMER TANNING AGENTS CONTAINING N-VINYL UNITS
WO/1997/021839	USE OF AQUEOUS SOLUTIONS OR DISPERSIONS OF COPOLYMERS OF CARBOXYL-GROUP-CONTAINING MONOMERS, ETHYLENICALLY UNSATURATED ACETALS, CETALS OR ORTHOCARBOXYLIC ACID ESTERS AND OPTIONALLY OTHER COPOLYMERISABLE MONOMERS AS LEATHER TANNING AGENTS

EERENFURIITO BAUMUGARUTONAA
RORUFU MONSUHAIMAA
ERUNSUTO PUFURAIDERERU
CHIRUMAN TEEGAA

JP21424183A

July 19, 1984

November 16, 1983

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ROEHM GMBH

C14C3/22; (IPC1-7): C14C3/22

Toshio Yano

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