Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presence of organopolysiloxanes containing sulphonate and mercapto groups

US5789628A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Emmanuel Auer · Frankfurt, DE
• Stefan Wieland · Offenbach, DE
• Hans Lansink-Rotgerink · Goldbach, DE
• Hauke Jacobsen · Bruchköbel, DE
• Heike Riedemann · Mömbris, DE

Key dates

• Filing date: Sep 20, 1996
• Grant date: Aug 4, 1998
• Expiry date: Sep 20, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of 2,2'-bis(4-hydroxyphenyl)propanes by reacting the corresponding phenols and carbonyl compounds in the presence of organopolysiloxanes containing sulphonate and mercapto groups and acting as a catalyst, consisting of units of the formula EQU O.sub.3/2 --Si--R.sup.1 --SO.sub.3 --!.sub.x M.sup.x+ (I), wherein R.sup.1 is a linear or branched alkylene group having 1 to 12 C atoms, a cycloalkylene group having 5 to 8 C atoms or a unit of the formulae ##STR1## and units of the formula EQU O.sub.3/2 --Si--R.sup.2 --SH (III)