Reaction products of phenolsulphonic acid-urea-formaldehyde as t

Details Reaction products of phenolsulphonic acid-urea-formaldehyde as t Reaction products of phenolsulphonic acid-urea-formaldehyde as t

1974-11-05

1977-03-01

Czaja, Donald E.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9421, 260 49, C08G 7520, C08G 7524, C14C 320

Patent

active

040099962

ABSTRACT:
The invention relates to reaction products of phenolsulphonic acid-urea-formaldehyde as agents for tanning of skins or leather. They are manufactured from a hydroxyphenylsulphone-hydroxyphenyl-monosulphonic acid which is condensed with an alkoxybenzene, this condensation product being reacted at elevated temperature in an aqueous-acid medium with an urea formaldehyde mixture or with a methylolated urea.

REFERENCES:
patent: 2127068 (1938-08-01), Muller
patent: 2129553 (1938-09-01), Russell et al.
patent: 2271245 (1942-01-01), Biedermann
patent: 2716098 (1955-08-01), Biedermann
patent: 2809088 (1957-10-01), Meister et al.
patent: 3010779 (1961-11-01), Komarek et al.
patent: 3475113 (1969-10-01), Sellet
patent: 3852374 (1974-12-01), Erdmann et al.

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