Method for preparing tannable pelts from animal skins and hides

Details Method for preparing tannable pelts from animal skins and hides Method for preparing tannable pelts from animal skins and hides

1974-01-09

1976-10-19

Monacell, A. Louis

Textiles: fiber preparation

C14C 106

Patent

active

039869261

ABSTRACT:
A method for preparing tannable pelts from animal skins or hides, said method effecting concurrent softening, dehairing, opening of the hide structure, and bating in a single procedural step, which method comprises treating said skins or hides, free of preserving salt, with an aqueous bath having a pH between about 9 and about 12 and having dissolved therein:
A. an effective amount of at least one member selected from the group consisting of a fungus protease whose optimum efficacy towards casein is at a pH above 7.0, and which protease may be replaced in whole or in part by trypsin and/or papain and/or by a bacterial protease whose maximum efficacy lies at a pH from 6 to 9;
B. an effective amount of a bacterial protease having an optimum efficacy against hemoglobin at a pH above 9; and
C. an effective amount of a short-chained, primary or secondary aliphatic amine.

REFERENCES:
patent: 2041731 (1936-05-01), Wallerstein et al.
patent: 2988488 (1961-06-01), Robison
Hetzel et al., "Use of Dimethylamine in Hair-Destroying Processes," J. Am. Leather Chemists Assn., July 1965, pp. 364-381.

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