10.
    发明专利
    未知

    公开(公告)号:DE19532719A1

    公开(公告)日:1997-03-06

    申请号:DE19532719

    申请日:1995-09-05

    Applicant: BASF AG

    Abstract: Disclosed are aqueous binder mixtures suitable for producing derived timber products and containing (A) an aqueous aminoplast resin consisting of (a1) melamine, (a2) 0.8 to 6 mol urea per mol melamine, (a3) 2 to 20 mol formaldehyde per mol melamine and (a4) 0 to 1 mol of another compound that can react with formaldehyde in an addition reaction or condensation reaction and is different from phenol or a condensation-polymerizable phenol derivative, per mol melamine, and (B) 0.55 to 0.75 mol urea per mol of the total amount of urea used as components (a2) and (B), with the proviso that the molar ratio of the melamine (component (a1)) to the total amount of urea (components (a2) and (B)) is 1:3.5 to 1:13 and that the molar ratio of formaldehyde (component (a3)) to the -NH2 groups in components (a1), (a2) and (B) is 0.2:1 to 0.7:1.

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