Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Patent
1979-07-25
1981-01-20
Schofer, Joseph L.
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Tanning
252 857, 528150, 528265, 260505C, C08G 1602, D06P 502, C08G 1406
Patent
active
042459966
ABSTRACT:
Condensation products which are obtained by co-condensation, in an acid aqueous medium, of terphenylsulphonic acids, naphthalenesulphonic acid, bis-(4-hydroxyphenyl) sulphone and compounds which release formaldehyde are used as tanning agents for the production of leather and as re-tanning agents for re-tanning mineral-tanned leather.
REFERENCES:
patent: 3193575 (1965-07-01), Nebel et al.
patent: 3423452 (1969-01-01), Lipowski
patent: 3906037 (1975-09-01), Schade et al.
patent: 3973904 (1976-08-01), Endres
patent: 4009996 (1977-03-01), Wurmli
Chem. Abs. 141986m, vol. 75 (1971) Meister et al. "Dihydroxydiphenyl Sulfone-Formaldehyde Cond. Prod. Use Tanning".
Nebeling Reinhard
Schade Franz
Zinz Bruno
Bayer Aktiengesellschaft
Lilling Herbert J.
Schofer Joseph L.
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