Mixtures of azodicarbonamide and .alpha.-amidosulphones and their production and use as a blowing agent

US4280004A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Werner Jeblick · Leverkusen, DE
• Ernst Roos
• Theo Kempermann
• Manfred Abele

Key dates

• Filing date: Sep 22, 1980
• Grant date: Jul 21, 1981
• Expiry date: Sep 22, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/91
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A mixture of azodicarbonamide and an .alpha.-amidosulphone corresponding to the general formula: ##STR1## in which R represents hydrogen, a C.sub.1 -C.sub.4 -alkyl residue and/or halogen, PA1 x represents numbers from 0 to 5, PA1 y represents numbers from 1 to 3, corresponding to the valency of R.sub.1, PA1 R.sup.1 represents an aromatic carboxylic acid residue or sulphonic acid residue with 6 carbon atoms, which is optionally substituted once or several times by halogen, C.sub.1 -C.sub.4 alkyl residues, C.sub.1 -C.sub.4 alkoxy residues, nitro and/or cyano, or represents an aliphatic carboxylic acid residue or a sulphonic acid residue with 1-4 carbon atoms, a carbonic acid residue, a thiocarbonic acid residue or a phosphoric acid residue which, corresponding to the numerical value of y, contains 0-2 phenoxy residues or C.sub.1 -C.sub.4 alkoxy residues optionally substituted with C.sub.1 -C.sub.4 alkyl or halogen, PA1 R.sup.2 represents R.sup.1, or hydrogen, a C.sub.1 -C.sub.4 alkyl residue, a C.sub.5 -C.sub.7 cycloalkyl residue, a phenyl residue, which is optionally substituted once or several times by C.sub.1 -C.sub.4 -alkyl or halogen, a phenyl alkyl residue whose phenyl group is…