MELAMINE RESIN FOAM

PROBLEM TO BE SOLVED: To obtain an open-cell foam exhibiting decreased oil and water absorption by coating the whole or a part of the surface of a resin having a cellular structure with a fluoroalkyl ester. SOLUTION: Preferably, an amount of a fluoroalkyl ester applied is 0.001-5 mass %, and the flu...

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Bibliographische Detailangaben
Hauptverfasser:	STOEHR DIETER, LENZ WERNER DR
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain an open-cell foam exhibiting decreased oil and water absorption by coating the whole or a part of the surface of a resin having a cellular structure with a fluoroalkyl ester. SOLUTION: Preferably, an amount of a fluoroalkyl ester applied is 0.001-5 mass %, and the fluoroalkyl ester is preferably a completely fluorinated one. Preferably, the fluoroalkyl ester is a completely fluorinated 1-10C alkyl ester of acrylic acid, methacrylic acid, polyacrylic acid, polymethacrylic acid, phosphoric acid, or a 1-6C fatty acid. The objective foam is prepared by immersing a melamine resin foam in a milky aqueous solution of a fluoroalkyl ester or spraying the solution into the foam, then squeezing the foam to remove an excess of the solution, and drying the foam at 40-200 deg.C. The concentration of the milky solution used is preferably 0.1-20 mass %.