Condensation products of terphenylsulphonic acids, naphthalenesu

Details Condensation products of terphenylsulphonic acids, naphthalenesu Condensation products of terphenylsulphonic acids, naphthalenesu

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".

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