MELAMINE-BASED RESIN FOAM, ITS PRODUCTION AND MELAMINE FORMALDEHYDE CONDENSATE

PURPOSE:To obtain the subject foam useful as a heat insulating material, etc., having improved brittleness without damaging flame-retardancy and a heat transfer coefficient, free from cracks by expanding a resin composition containing a melamine formaldehyde condensate, a blowing agent and an isocya...

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Bibliographische Detailangaben
Hauptverfasser:	IMASHIRO YASUO, HASEGAWA TAKASHI, OKUYA TATSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the subject foam useful as a heat insulating material, etc., having improved brittleness without damaging flame-retardancy and a heat transfer coefficient, free from cracks by expanding a resin composition containing a melamine formaldehyde condensate, a blowing agent and an isocyanate. CONSTITUTION:This melamine-based resin foam having solved a problem of brittleness is safely obtained by mixing (A) a melamine formaldehyde condensate obtained by reacting melamine with formaldehyde in the presence of 0.5-15 pts.wt. of a silane coupling agent (e.g. gamma-glycidoxypropyltrimethoxysilane) based on 100 pts.wt. of the melamine formaldehyde condensate with (B) a blowing agent (e.g. pentane) and (C) an isocyanate (e.g. polymeric-4,4'-diphenylmethane diisocyanate) to give a resin composition, packing the resin composition into a mold, expanding in an oven at 100 deg.C without damaging flame retardancy and a heat transfer coefficient.