Sulphonamide derivatives and their preparation and use

US4764570A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Steffen Piesch · Oberursel, DE
• Peter Dorries · Frankfurt am Main, DE

Key dates

• Filing date: Apr 6, 1987
• Grant date: Aug 16, 1988
• Expiry date: Apr 6, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G12/34
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Sulphonamide compounds of the formula ##STR1## are prepared by condensation of sulphonamides of the formula EQU R.sup.1 --SO.sub.2 --NH.sub.2-m-p R.sup.2.sub.m (--CH.sub.2 OH).sub.p with formaldehyde and diols or diol monoethers of the formula ##STR2## in a molar ratio of sulphonamide: formaldehyde: diol or diol monether of 1:(1-p):0.5 to 1:(4-p):6 in the presence of a catalyst which splits off water and at temperatures of 80.degree. to 250.degree. C., PA0 wherein PA1 R.sup.1 is phenyl, phenyl substituted phenyl, or alkyl substituted phenyl having 1 to 4 alkyl carbon atoms, PA1 R.sup.2 is alkyl having 1 to 4 carbon atoms, PA1 R.sup.3 is hydrogen or alkyl having 1 to 4 carbon atoms, PA1 R.sup.4 is hydrogen or alkyl having 1 to 18 carbon atoms, PA1 R.sup.5 is hydrogen, R.sup.2, ##STR3## R.sup.6 is R.sup.4 or ##STR4## m is zero or one, p is zero, one or two with the sum of m and p ranging from 0 to 2, and PA1 n is a number from 2 to 19 PA1 q is one, two or three and the compounds so obtained are used as modifying agents for melamine resins.