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Prepn of pure basic dyes in the presence of water-sol - non-ionic surfactants
Prepn of pure basic dyes in the presence of water-sol - non-ionic surfactants
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机译:纯溶胶在水溶胶存在下的制备-非离子表面活性剂
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摘要
Basic dyestuffs, e.g. of the azo, anthraquinone, phthalocyanine, styryl series, etc., are obtained as technically pure products by treating their solns., during or after their prepn. with 2-20%, calc. on the yield of dyestuff with the non-ionic addition products of alkylene oxides, advantageously ethylene oxide and cpds. contg. H, these adducts contng. 8-HO mols. alkylene oxide per active H atom, a suitable non-ionic surfactant being obtained by oxyethylating an addition product of 2.5 mol. styrene and 1 mol. phenol with 16 mol. ethylene oxide.
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