Process for the production of waterproof leathers and skins

Details Process for the production of waterproof leathers and skins Process for the production of waterproof leathers and skins

1983-09-08

1985-07-09

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9422, 8 9423, 252 857, C14C 902, C14C 900, C14C 1100

Patent

active

045279926

ABSTRACT:
This invention relates to a process for producing waterproof leathers and skins by tanning, retanning, dyeing, stuffing, and fixing which is characterized in that, after tanning and, optionally, dyeing, stuffing agents (A) in the form of oxidized or oxidized and partly sulfonated long-chain hydrocarbons of waxes and impregnating agents (B) in the form of copolymers or from 60 to 95 mol percent of (meth) acrylic acid and from 5 to 40 mol percent of an ester, amide or nitrile of (meth) acrylic acid having a molecular weight of from 800 to 10,000 in salt form are successively used in the same bath, followed by acidification, fixing and finishing. The co-use of the impregnating agents (B) with the particular stuffing agents (A) results in much greater degree of resistance to water penetration than that obtained by the use of the stuffing agent (A), alone.

REFERENCES:
patent: 2061618 (1936-11-01), Downing et al.
patent: 2118308 (1938-05-01), Jaeger
patent: 2630408 (1953-03-01), Lighthipe et al.
patent: 3765833 (1973-10-01), Plapper et al.
patent: 4314800 (1982-02-01), Monsheimer et al.
patent: 4398911 (1983-08-01), May et al.

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