Composite material of wood and plastic - from phenol resin and polyisocyanate, useful in building industry

Title prod. is obtd. by preparing a mixt. of a phenol resin and a polyisocyanate, which may contain other additives, stirring the mixt. rapidly with wood pieces, and allowing the mixt. to react. The prod. has, in comparison with known resin foams, a higher load-bearing capacity. The phenol resin is...

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Bibliographische Detailangaben
Hauptverfasser:	GRABHOEFER, HERBERT. DR., 4500 OSNABRUECK, FISCHER, ALFRED, 4700 HAMM
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 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
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Beschreibung
Zusammenfassung:	Title prod. is obtd. by preparing a mixt. of a phenol resin and a polyisocyanate, which may contain other additives, stirring the mixt. rapidly with wood pieces, and allowing the mixt. to react. The prod. has, in comparison with known resin foams, a higher load-bearing capacity. The phenol resin is a condensation prod. of phenol and formaldehyde, and opt. a sec. amine, which may be modified by ethylene or propylene oxide, tetrachloro- or tetrabromo-phthalic acid anhydride, or lactones. Pref. polyisocyanates are described in DT 2105193. The phenol resin/polyisocyanate mixt. is mixed with wood pieces in a ratio from 1 : 1 to 9 : 1 and the reaction is carried out in moulds to form sheets.