FINE POWDERY AZODICARBONAMIDE

PURPOSE: To obtain an extremely lightwelight fine powdery azodicarbonamide, useful for producing a rubber foam having uniform and fine bubbles, excellent in heat insulating properties, elasticity, mechanical strength, etc., and capable of retaining various performances at a high level for a long per...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAO TOSHITOMO, KANEKAWA MASATO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PURPOSE: To obtain an extremely lightwelight fine powdery azodicarbonamide, useful for producing a rubber foam having uniform and fine bubbles, excellent in heat insulating properties, elasticity, mechanical strength, etc., and capable of retaining various performances at a high level for a long period. CONSTITUTION: This fine powdery azodicarbonamide has =3.0m /g, preferably >=3.5m /g BET specific surface area. The azodicarbonamide having the average particle diameter and BET specific surface area within the ranges has a larger volume of emitted gases than that of a conventional one and a decomposition starting temperature as low as about 130-140 deg.C and is capable of advancing the cross- linking and expanding nearly at the same time when used for expanding a rubber composition. The azodicarbonamide is used in an amount within the range of 0.1-40 pts.wt., preferably 0.2-25 pts.wt. based on 100 pts.wt. material to be expanded.