Process for tanning leather

Details Process for tanning leather Process for tanning leather

1987-10-05

1989-03-07

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9419R, C14C 318

Patent

active

048102520

ABSTRACT:
Use of a resin mixture of, or of a mixed resin from, a melamine-formaldehyde resin and an anionically modified melamine-formaldehyde resin for tanning leather. The anionic modification of the melamine-formaldehyde resin is obtained by preparing the resin in the presence of alkali metal sulfite, alkali metal hydrogensulfite or alkali metal sulfamate. By partial modification it is possible to obtain a mixed resin, while mixing a modified with an unmodified resin gives a resin mixture.

REFERENCES:
patent: 2303209 (1942-11-01), Grim

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