Hydrogen peroxide-containing bleach liquor and bleaching method

Details Hydrogen peroxide-containing bleach liquor and bleaching method Hydrogen peroxide-containing bleach liquor and bleaching method

1997-10-27

1999-01-05

Diamond, Alan

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

510309, 510367, 510372, 25218625, 25218628, 25218629, 25218641, 25218643, 162 78, D06L 302, D21C 108

Patent

active

058556222

ABSTRACT:
A hydrogen peroxide-containing bleach liquor containing one or more compounds selected from organic phosphonic acids and their salts; and a water-soluble alkylamide. A bleaching method comprising using this bleach liquor or this bleach liquor deprived of the water-soluble alkylamide; and performing bleaching with the bleach liquor set at pH 10.0 to 10.7 and heated at 80.degree. to 130.degree. C. (110.degree. to 130.degree. C. in the absence of the alkylamide). The hydrogen peroxide-containing bleach liquor achieves an excellent bleaching effect without using a silicic acid-derived substance which causes a silicate-induced trouble. The bleaching method achieves an unsurpassed bleaching effect by use of the bleach liquor at a temperature in a broad range of 80.degree. to 130.degree. C. under lower alkaline conditions while curtailing the diminution of the physical properties of fibers to be bleached, whether cotton or synthetic fibers.

REFERENCES:
patent: 2898181 (1959-08-01), Dithmar et al.
patent: 3122417 (1964-02-01), Blaser et al.
patent: 3234140 (1966-02-01), Irani
patent: 3860391 (1975-01-01), Kling et al.
patent: 4130501 (1978-12-01), Lutz et al.

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