PRODUCTION OF PHENOLIC RESIN FOAM

PURPOSE:To provide a process for producing a phenolic resin foam which is attracting attention as a construction material due to its flame retardancy and less-fuming properties, which process is free from a problem that a phenolic resin foam having all of lightweight properties, strength, and proces...

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Bibliographische Detailangaben
Hauptverfasser:	HOTTA KATSUMI, NAGATANI YASUHISA
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 provide a process for producing a phenolic resin foam which is attracting attention as a construction material due to its flame retardancy and less-fuming properties, which process is free from a problem that a phenolic resin foam having all of lightweight properties, strength, and processability has been unable to be produced efficiently by any conventional method. CONSTITUTION:A phenol is reacted with formaldehyde or a derivative thereof in the presence of a basic catalyst to obtain a condensate. This condensate is neutralized by adding thereto a mixed acid containing phosphoric acid, thereby to obtain a resol resin. This resin is mixed with a foam stabilizer, a foaming agent, an inorganic filler, a hardener, etc., and the resulting foamable composition is foamed to obtain the objective phenolic resin foam.