Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Patent
1978-06-12
1980-01-15
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Tanning
8 44, 8 542, C09B 2700
Patent
active
041837274
ABSTRACT:
An improved process for the preparation of water-insoluble azo dyestuffs on vegetable fibers according to the method of the ice-color technique had been found, impregnating first the fibrous material with an azo component and then developing it with a diazo solution of an aromatic amino compound in the neutral or slightly alkaline range, wherein an alkali metal borate is used to neutralize the diazo solution.
The dyeings prepared in this improved dyeing process for ice color dyeing have very good fastness properties and are obtained with high color yields. The improvement of the dyeing process is seen in the use of alkali metal borate as a neutralizing agent, which avoids the creation of foam in the surfactant-containing diazo solution.
REFERENCES:
patent: 1975409 (1934-10-01), Schnitzspan
patent: 2178744 (1939-11-01), Ellis et al.
patent: 3288552 (1966-11-01), Streck
patent: 3561914 (1971-02-01), Abel et al.
patent: 3697216 (1972-10-01), Hertel et al.
patent: 3711245 (1973-01-01), Neumer
patent: 4035144 (1977-07-01), Hertel
patent: 4082503 (1978-04-01), Hertel
Frey Peter
Hertel Hasso
Clingman A. Lionel
Hoechst Aktiengesellschaft
LandOfFree
Process for the production of water-insoluble azo dyestuffs on t does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of water-insoluble azo dyestuffs on t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of water-insoluble azo dyestuffs on t will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1027080