Patent ID: 7976668

Claim:
A process for the production of a wood-base material which has at least one thin veneer layer adhesively bonded over the surface to a substrate or to further veneer layers, comprising: i) impregnating at least one veneer with an aqueous curable composition which comprises a) at least one crosslinkable urea compound selected from urea compounds H which have at least one N-bonded group of the formula CH 2 OR, where R is hydrogen or C 1 -C 4 -alkyl, and/or a 1,2-bishydroxyethane-1,2-diyl group bridging the two nitrogen atoms of the urea, precondensates of the urea compound H, and reaction products or mixtures of the urea compound H with at least one alcohol which is selected from C 1 -C 6 -alkanols, C 2 -C 6 -polyols and oligoethylene glycols, and b) at least one catalyst K effecting crosslinking of the urea compound; ii) applying a glue composition to the impregnated veneer and/or the substrate and iii) processing the veneer to give a wood-base material, wherein the glued veneer is adhesively bonded over the surface to the substrate or wherein the veneer is bonded over the surface to the glued substrate or wherein two or several veneers are bonded together or wherein the substrate and the further veneer are bonded together, at elevated temperature with curing of the crosslinkable urea compound, the impregnated veneer comprising the crosslinkable urea compound in substantially uncrosslinked form during the applying in ii).