4,4'-bis-(.beta.-hydroxyethylsulfonyl)-biphenyl and its esters

Details 4,4'-bis-(.beta.-hydroxyethylsulfonyl)-biphenyl and its esters 4,4'-bis-(.beta.-hydroxyethylsulfonyl)-biphenyl and its esters

C - Chemistry, Metallurgy

07

F

260/464, 260/460

C07F 9/09 (2006.01) C07C 317/18 (2006.01) C07C 381/02 (2006.01) D06P 1/651 (2006.01)

Patent

CA 1254224

Abstract of the disclosure: 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 phos- phato group. They can be prepared by first converting bi- phenyl by sulfochlorination into biphenyl-4,4'-disulfo- chloride, 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 auxi- liaries in dyeing processes for such fiber materials.

490714

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