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

US4659856A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hartmut Springer · Königstein, DE
• Gerd Konig · Hofheim, DE

Key dates

• Filing date: Sep 12, 1985
• Grant date: Apr 21, 1987
• Expiry date: Sep 12, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/091
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the general formula (1) ##STR1## 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.