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 9419C, C14C 318

Patent

active

041068980

ABSTRACT:
This invention is concerned with a method of tanning or retanning leather or pelts by treating them with an aqueous liquor containing hydrophilic oligourethanes. 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 hydrophilic segments. 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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