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    Method for producing wood-base materials
    1.
    发明专利
    Method for producing wood-base materials 未知

    公开(公告)号：ZA200708404B

    公开(公告)日：2009-11-25

    申请号：ZA200708404

    申请日：2007-10-02

    Applicant: BASF AG

    Inventor： KINGMA AREND JOUKE ,  FRANZ WEINGART ,  HOLGER MILITZ ,  FALKO WEPNER ,  ANDREAS KRAUSE

    IPC: B27D20100101 ,  B27K20100101

    Abstract: The present invention relates to a process for the production of wood-base materials which have at least one thin veneer layer adhesively bonded over the surface to a substrate or to further veneer layers, which process comprises the following steps: i. impregnation of a veneer with an aqueous curable composition which comprises a) at least one curable urea compound selected from urea compounds H which have at least one N-bonded group of the formula CH2OR, where R is hydrogen or C1-C4-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 C1-C6-alkanols, C2-C6-polyols and oligoethylene glycols, and b) at least one catalyst K effecting crosslinking of the urea compound; ii) gluing of the impregnated veneer and/or the substrate with a glue composition and iii) processing of the glued veneer to give a wood-base material at elevated temperature with curing of the crosslinkable urea compound, the impregnated veneer comprising the crosslinkable urea compound in substantially uncrosslinked form before the gluing in step ii).

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