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    New cobalt complexes of monoazo dyestuffs and their preparation and use
    3.
    发明专利
    New cobalt complexes of monoazo dyestuffs and their preparation and use 未知

    公开(公告)号：GB860356A

    公开(公告)日：1961-02-01

    申请号：GB2546258

    申请日：1958-08-08

    Applicant: BASF AG

    Inventor： PFITZNER HELMUT ,  DEHNERT JOHANNES

    Abstract: The invention comprises cobalt complexes of dyes of formula X-Ar-N=N-Np-OH where Ar is the residue of a monocyclic aromatic ring free from SO3H groups, X is an #s-hydroxy or -alkoxy group and Np is a napthalene ring which contains the OH group #s to the azo bridge and has as the only substituents two groups of formula SO2NR1,R2 where R1 is H or an alkyl group, which may be substituted, or a phenyl group and R2 is as R1, but may not be H, and R1 and R2 may be joined to form, with N, a heterocyclic ring. The cobalt dyes are made in conventional fashion by cobalting the dyes obtained by diazotizing appropriate anilines and coupling with the desired naphthols. Representative of diazo components used are :-1-amino-5-chloro-and -nitro-2-phenols and 1-amino-2, 4-dimethoxy -5-chloro-benzene. Indicative of naphthols used are the amides of 1-naphthol-3, 6- and 2-naphthol - 3, 6-, -5, 7- and -6, 8-disulphonic acids derived from amines such as methyl-, dimethyl,-cyclohexyl-, 2-hydroxyethyl-, 3-methoxypropyl- and N-methyl-N-2-hydroxyethyl-amines, morpholine and aniline and its 2-carboxy and -methoxy and 4-sulphonamido derivatives. Metallization may be effected with a mixture of metallizable azo or azomethine dyes provided one of the dyes corresponds to the above formula. The dyes dye natural polyamides e.g. wool, silk and leather and synthetic poly -amides and -urethanes. Coloured organic solutions and plastic masses may also be obtained. Examples are provided of the preparation of the dyes and their use in dyeing wool in blue and violet shades.

    Production of 1,4-dialkylated 2-phenylindolyl-3-azo-1,2,4-triazolium dyes
    5.
    发明专利
    Production of 1,4-dialkylated 2-phenylindolyl-3-azo-1,2,4-triazolium dyes 未知

    公开(公告)号：GB938814A

    公开(公告)日：1963-10-09

    申请号：GB4521561

    申请日：1961-12-18

    Applicant: BASF AG

    Inventor： PFITZNER HELMUT ,  BAUMANN HANS

    IPC: C09B29/033 ,  C09B44/18

    Abstract: Basic monoazo dyes having a cation of formula wherein X is a hydrogen atom or methyl radical and R is an alkyl or aralkyl group are prepared by decarboxylating a compound of formula by heating and alkylating the product. The dyes may be used to colour acrylonitrile polymers in orange and yellow shades. In examples: (1) the monoazo dye 3-amino-1,2,4-triazole-5-carboxylic acid- -->2-phenylindole is prepared and heated in dimethylformamide, and dimethylsulphate or benzyl chloride, is added to the mixture which is heated for several hours at 110 DEG -125 DEG C., cooled, diluted with ice water and salt added to precipitate the dye; (2) the monoazo dye 3-amino-1,2,4-triazole-5-carboxylic acid- --> 1-methyl-2-phenylindole is prepared, decarboxylated by heating in dilute aqueous hydrochloric acid, the decarboxylated dye separated, methylated with dimethyl sulphate and precipitated as the zinc chloride double salt. Specifications 787,891 and 837,471 are referred to.

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