Blowing agent combination comprising azodicarbonamide, zinc oxide and a benzenethiol sulphonic acid derivative

US4263165A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ernst Roos
• Werner Jeblick · Leverkusen, DE
• Helmut Hurnik · Leverkusen, DE

Key dates

• Filing date: May 7, 1980
• Grant date: Apr 21, 1981
• Expiry date: May 7, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/05
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A blowing agent combination comprising azodicarbonamide, zinc oxide and a benzenethiol sulphonic acid derivative having the general formula (I) ##STR1## wherein R is a hydrogen atom, a C.sub.1 -C.sub.4 alkyl radical and/or a chlorine atom, PA0 X is a number from 1 to 5, and PA0 R' is a C.sub.1 -C.sub.4 alkyl radical, a C.sub.5 -C.sub.6 cycloalkyl radical or a C.sub.7 -C.sub.8 arylalkyl radical each of these radicals being optionally substituted by from 1 to 3 C.sub.1 -C.sub.4 alkyl radicals, from 1 to 5 chlorine atoms and/or a carboxylic acid C.sub.1 -C.sub.4 alkyl ester radical, or a radical having one of the general formulae (11a), (11b), (11c) or (11d). ##STR2## in which y is a number from 0 to 3, PA0 R" is a C.sub.1 -C.sub.6 alkylene radical or a xylylene radical which is optionally substituted by from 1 to 4 methyl radicals and/or from 1-4 chlorine atoms and R and X are as defined above; may be used as blowing agents.