Leather tanning with oligourethanes

Details Leather tanning with oligourethanes Leather tanning with oligourethanes

1976-08-30

1978-08-15

Kight, III, John

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9419R, C14C 000

Patent

active

041068971

ABSTRACT:
This invention is concerned with a method of tanning or retanning leather or pelts by treating them with an aqueous liquor containing water-soluble oligourethanes having ionic groups. The oligourethanes have a molecular weight of from 300 to 20,000 and they may be methylolated. The oligourethanes may be water-soluble owing to their ionic groups or they may contain hydrophilic segments to aid in their solubility in the aqueous liquor. The liquor may also contain up to an equal amount of formaldehyde or compounds which split off formaldehyde.

REFERENCES:
patent: 3374051 (1968-03-01), Garber
patent: 3462237 (1969-08-01), Sellet
patent: 3674415 (1972-07-01), Sellet
patent: 3756992 (1973-09-01), Dieterich

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