Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Chemical
Patent
1975-03-25
1976-04-20
Levy, Donald
Bleaching and dyeing; fluid treatment and chemical modification
Bleaching
Chemical
252186, 252 99, 252 97, 252 95, 252135, 252157, D06L 302, C11D 756
Patent
active
039515940
ABSTRACT:
Textile fabrics have been bleached with aqueous solutions of hydrogen peroxide for many years. Since hydrogen peroxide is quite unstable under bleaching conditions, stabilizers have been necessary and silicate of soda, commonly called water glass, is the stabilizer commonly used in the industry. Water glass has a number of disadvantages when used in commercial bleaching of textiles. This invention provides new processes for bleaching textile fabrics with aqueous solutions of hydrogen peroxide containing sodium orthosilicate in combination with a magnesium ion-polyphosphate ion stabilizer and new compositions of matter comprising aqueous solutions of hydrogen peroxide containing an effective amount of sodium orthosilicate and magnesium-polyphosphate stabilizer.
REFERENCES:
patent: 2820690 (1958-01-01), Feldmann
patent: 3003910 (1961-10-01), Dithmar
patent: 3640885 (1972-02-01), Rhees
patent: 3687627 (1972-08-01), Stalter
patent: 3740187 (1973-06-01), Kowalski
Danehower Robert G.
Levy Donald
Pennwalt Corporation
Tungol Maria S.
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