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EIWA KASEI KOGYO KK
Eiwa Chemical Industries Co Ltd
Original Assignee
EIWA KASEI KOGYO KK
Eiwa Chemical Industries Co Ltd
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Application filed by EIWA KASEI KOGYO KK, Eiwa Chemical Industries Co LtdfiledCriticalEIWA KASEI KOGYO KK
Priority to JP11201980ApriorityCriticalpatent/JPS5736133A/en
Publication of JPS5736133ApublicationCriticalpatent/JPS5736133A/en
Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products
(AREA)
Abstract
PURPOSE: A blowing agent composition, containing a mixture component of an azodicarbonamide with dinitrosopentamethylenetetramine and biuret, and having a decomposition temperature suitable for foaming processing in a medium temperature region, and improved storage stability without a decomposition smell.
CONSTITUTION: A mixture component of azodicarbonamide with dinitrosopentamethylenetetramine is incorporated with biuret. Preferably, the respective components are fine powdery crystals, and another filler may be mixed therewith if necessary. 100pts.wt. blowing composition is preferably incorporated with 5W 50pts.wt. azodicarbonamide, 3W35pts.wt. dinitrosopentamethylenetetramine and 40W70pts.wt. biuret. In the foaming processing step, the composition is foamed and decomposed at about 155W175°C.