Process for cold-hardening polyurethane foams using sulfonamide emulsifiers

US4101468A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hermann Perrey · Krefeld, DE
• Hans-Joachim Meiners · Leverkusen, DE
• Jurgen Ick · Dorpsstraat, US

Key dates

• Filing date: Feb 10, 1977
• Grant date: Jul 18, 1978
• Expiry date: Feb 10, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/904
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing cold-hardening foams containing urethane groups using as an emulsifier, sulphonamide compounds of the formula: ##STR1## wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms, PA1 R.sup.1 and R.sup.2, which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical, PA1 m is an integer of from 0 to 50, PA1 R.sup.3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a --(CHR.sup.1 -CHR.sup.2 -O-).sub.m R.sup.4 - group and PA1 R.sup.4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanalkyl radical having from 1 to 20 carbon atoms. The use of these additions results in an increase in compression hardness without detrimental effects on other foam properties.