Bleaching and dyeing; fluid treatment and chemical modification – Dye concentrate composition wherein an additional amount of...
Patent
1996-09-09
1999-07-13
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Dye concentrate composition wherein an additional amount of...
8528, 8652, 8561, D06P 130, D06P 148
Patent
active
059220872
ABSTRACT:
Stable, pourable aqueous suspensions of solid particulate materials are provided, especially suspensions of sulfur dyes which are characterized a very low content of inorganic sulfides and inorganic polysulfides. The suspensions are produced using certain suspension stabilizing agents, particularly polysaccharides, such as xanthan gum, whose solutions in water are pseudoplastic. The suspensions may further comprise a non-sulfide reducing agent. An improved method is also provided for determining the the potential for such suspensions to release hydrogen sulfide upon being acidified at a given temperature, which method comprises acidifying a sample of the suspension to pH 2.9-3.7, capturing all of the hydrogen sulfide released during acidification in aqueous alkali and measuring the sulfide ion content of the aqueous alkali.
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Xanthan Gum Natural biogum for scientific water control (Jun. 1994), Kelco Division of Merck & Co., Inc.
Danhieux Guido J.
Ho Catherine S.
Merkert Jon W.
Myers Dwayne R.
Nishioka Masato
Clariant Finance (BVI) Limited
Doyle Thomas C.
Einsmann Margaret
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