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4,4-BIS (-HYDROXIETYLSULPHONYL) -DIPHENYL OCH DESS ESTRAR, FOERFARANDE FOER DESS FRAMSTAELLNING OCH DESS ANVAENDNING.
4,4-BIS (-HYDROXIETYLSULPHONYL) -DIPHENYL OCH DESS ESTRAR, FOERFARANDE FOER DESS FRAMSTAELLNING OCH DESS ANVAENDNING.
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机译:4,4-双(-羟基乙硫基)-二苯及其酯,其制备和使用方法。
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摘要
Compounds of the general formula (1) IMAGE (1) in which the Zs, preferably identical to each other, each denote a hydroxy group or a sulfato, thiosulfato or phosphato group. They can be prepared by first converting biphenyl by sulfochlorination into biphenyl-4,4'-disulfochloride, then reducing the latter with an alkali metal or alkaline earth metal sulfite or hydrogensulfite to sulfinic acid, and in turn reacting the latter with ethylene oxide to give 4,4'-bis-( beta -hydroxyethylsulfonyl)-biphenyl, which can be esterified in conventional manner. They are used for modifying and improving the physical and coloristic properties of materials made of natural and/or synthetic polyamide fibers and/or polyurethane fibers and as auxiliaries in dyeing processes for such fiber materials.
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