Tanning agent and process

Details Tanning agent and process Tanning agent and process

1989-02-02

1990-10-16

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9421, 8 9427, 8 9426, 8 9419R, C14C 304

Patent

active

049631560

ABSTRACT:
A leather tanning agent for use as a sole tannage or with another includes Al (III) ions, Ti (IV) ions and an organic masking agent in specific proportions. The ratio of Ti:Al expressed as metal oxides TiO.sub.2 :Al.sub.2 O.sub.3 on a weight basis is from 0.6:1 to 2:1 and the amount of masking agent is from 0.1 to 0.4 mole per mole of total metal oxides. Preferably SO.sub.4 ions are present.
Other metal tanning agents such as zirconium salts can be incorporated.
The tanning agent finds wide use and has an increased stability.

REFERENCES:
patent: 4731089 (1988-03-01), Covington

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