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    PROCESS FOR THE PREPARATION OF AMINOPLAST RESINS AND THEIR USE
    2.
    发明专利
    PROCESS FOR THE PREPARATION OF AMINOPLAST RESINS AND THEIR USE 未知

    公开(公告)号：DE3263287D1

    公开(公告)日：1985-05-30

    申请号：DE3263287

    申请日：1982-09-18

    Applicant: BASF AG

    Inventor： HUMMERICH RAINER DR ,  HAHN HERBERT DR ,  WEISS WOLFRAM DR ,  IMMEL GUENTHER DR ,  KRAUSE HANS-JOACHIM DR ,  PETERS KARL-CLEMENS DR

    IPC: C08G12/30 ,  C08G12/32 ,  C08G12/42 ,  C09D3/50

    Abstract: A process for the preparation of etherified or non-etherified aminoplast resins, wherein an aminotriazine of the general formula (I) (I) where X is hydrogen, alkyl, phenyl, alkylphenyl or -NH2, is reacted with a beta -hydroxyaldehyde of the general formula (II) (II) where R', R'' and R''' are identical or different and each is hydrogen or alkyl, or R'' and R''', together with the alpha -carbon atom, are a cyclopentane or cyclohexane ring, and R'' and/or R''' can be hydroxyalkyl and R'' can be phenyl, the reaction being carried out in the presence of not less than one alcohol and an acid catalyst for the preparation of etherified aminoplast resins and in the presence or absence of an acid catalyst for the preparation of non-etherified aminoplast resins. The aminoplast resins prepared according to the invention can be used as surface-coatings raw materials.

    4.
    发明专利
    未知

    公开(公告)号：DE3425131A1

    公开(公告)日：1986-01-16

    申请号：DE3425131

    申请日：1984-07-07

    Applicant: BASF AG

    Inventor： PETERSEN HARRO DR ,  IMMEL GUENTHER DR ,  WEISS WOLFRAM DR ,  SCHMIDT HORST DR ,  BUSSE GERD

    IPC: C08G12/00 ,  C08G12/12 ,  C08G12/40 ,  C08G12/42 ,  C09D161/20 ,  C09D161/32 ,  C09D3/50

    Abstract: A process for the preparation of curable etherified aminoplast resins based on urea/aldehyde polycondensates, and the preparation of surface coating resins. Urea is first reacted with an alpha , alpha -dialkylaldehyde, as much as 50 mol % of which may be replaced by formaldehyde, in a molar ratio urea/aldehyde of about 1:2, at from 50 DEG to 120 DEG C., in the presence of an acid and in the presence or absence of an alcohol or of other organic solvents, and the 2-oxohexahydropyrimidine derivative obtained in this cyclocondensation is then condensed with formaldehyde in the presence of one or more alcohols and an acid. These aminoplast resins are useful as both acid-curable resins and as resins for baking finishes.

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