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    43.
    发明专利
    未知

    公开(公告)号：FI57775C

    公开(公告)日：1980-10-10

    申请号：FI108371

    申请日：1971-04-20

    Applicant: BASF AG

    Inventor： MAYER JOHANN ,  SCHMIDT-HELLERAU CHRISTOF

    IPC: C08G14/06 ,  C09J161/34 ,  C09J3/16

    Abstract: Procedure for obtaining wood glues, which per mole of melamine, or a mixture of at least 15 mole% melamine and up to 85 mole% urea, contain 1.7 to 3.0 moles of formaldehyde and 0.05 mol to 0.2 mol of a phenol, characterized in that in each case 1 mol of melamine and/or urea and from 1.5 to 2.5 mol of formaldehyde are condensed in a known manner in aqueous solution until a compatibility with water of 0.5 to 10 and the condensate is reacted at a ph of 7.5 to 10 and between 45 and 100º c, in each case with 0.05 to 0.2 mol of a phenol, if necessary, with up to 0.5 mol of formaldehyde and, if necessary, with up to 0.5 mol of melamine, until the aqueous solution reaches a viscosity of 300 to 2000 cp, measured with a solids content of 63% and 20ºc. (Machine-translation by Google Translate, not legally binding)

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