12.
    发明专利
    未知

    公开(公告)号:DE102005058855A1

    公开(公告)日:2007-06-14

    申请号:DE102005058855

    申请日:2005-12-09

    Applicant: BASF AG

    Abstract: Process for the preparation of etherified melamine/formaldehyde condensates, in which first a methylolation of melamine with a formaldehyde component in the molar ratio of from 1:6 to 1:15, preferably at a pH of >7, is carried out. This is followed by an etherification of the resulting hydroxymethylation intermediate in the presence of a C1-C20-alkyl, preferably of a C1-C6-alcohol, particularly preferably of a C1-C4-alcohol, at a pH of 9.5 being established before, during and/or after the distillation. According to the invention, a plurality of hydroxymethylation, etherification and distillation steps follow in order to achieve an etherified melamine/formaldehyde condensate which is distinguished by a high degree of hydroxymethylation, a high solids content and a low viscosity.

    13.
    发明专利
    未知

    公开(公告)号:BRPI0406641A

    公开(公告)日:2005-12-06

    申请号:BRPI0406641

    申请日:2004-01-22

    Applicant: BASF AG

    Abstract: A process for the preparation of aqueous formulations, and aqueous formulations so prepared, the process comprising heating at least one cyclic compound of the formula I in the presence of water and of an acidic catalyst and, during or after the heating, H-X-R 3 is at least partially separated off, where, in formula I, X is selected from oxygen, sulfur and N-R 6 , R 1 -R 6 are as defined, and n is an integer from 1 to 4.

    20.
    发明专利
    未知

    公开(公告)号:AT178057T

    公开(公告)日:1999-04-15

    申请号:AT94113935

    申请日:1994-09-06

    Applicant: BASF AG

    Abstract: Hydroxyoxaalkylmelamines of the formula I wherein R is a radical of the formula II H &lparstr& O-CHR'-CHR' &rparstr& n (II), in which the radicals R' can be identical or different and represent hydrogen or C1-C4-alkyl and n has the meanings 2 or 3 and the radicals R and R represent one of the radicals R or hydrogen, are prepared by reaction of melamine with a compound of the formula III H &lparstr& O-CHR'-CHR' &rparstr& n-NH2 (III), wherein R' and n have the meanings indicated above, at a temperature from 120 to 250 DEG C in the presence of an acidic catalyst, the acidic catalyst being employed in an amount from 0.01 to 0.15 mol, relative to 1 mol of melamine.

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