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    LONG-STORAGE STABILIZATION OF LIQUID PREPARATIONS OF CATIONIC DYES
    3.
    发明专利
    LONG-STORAGE STABILIZATION OF LIQUID PREPARATIONS OF CATIONIC DYES 未知

    公开(公告)号：DE3568181D1

    公开(公告)日：1989-03-16

    申请号：DE3568181

    申请日：1985-10-12

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  ONG SIENLING ,  HOHMANN KURT

    IPC: C09B67/22 ,  C09B67/32 ,  C09B67/34

    Abstract: Liquid formulations of mixtures of cationic dyes frequently have a very short storage life. As a consequence, these formulations give rise to customer complaints concerning incorrect dyeing strengths and hues and concerning isoluble constituents. It has now been found according to the invention that powder formulations and in particular liquid formulations of cationic dyes or of mixtures of these dyes can be stabilized by adding selected oxidizing agents.

    4.
    发明专利
    未知

    公开(公告)号：BR8406766A

    公开(公告)日：1985-10-22

    申请号：BR8406766

    申请日：1984-12-28

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  KUHN REINHARD ,  HAHNLE REINHARD ,  SCHICKFLUSS RUDOLF

    IPC: C09B67/22 ,  C09B67/38

    Abstract: Disperse Blue 56 is an important blue dyestuff for dyeing PES fibers at the boil or under high-temperature conditions. This anthraquinonoid compound Disperse Blue 56, in addition to its advantages (high light fastness, pH/reduction insensitivity, purity of hue), has some technical disadvantages (poor leveling properties, pronounced staining of adjacent fiber, metameric red shift). By combining a plurality of blue disperse azo dyestuffs having selected structural features in the form of mixtures or mix-crystals it is possible to match the advantages of Disperse Blue 56 while substantially avoiding its disadvantages at the same time. These azo dyestuffs are based on coupling products of diazotized 2,6-substituted 4-nitroanilines with substituted N,N-dialkylanilines.

    PROCESS FOR THE PREPARATION OF XANTHENE DYESTUFFS
    6.
    发明专利
    PROCESS FOR THE PREPARATION OF XANTHENE DYESTUFFS 未知

    公开(公告)号：CA1064916A

    公开(公告)日：1979-10-23

    申请号：CA242170

    申请日：1975-12-19

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  KOHLHAAS FOLKER ,  MEININGER FRITZ ,  PAPENFUHS THEODOR

    IPC: C09B11/00 ,  C09B11/24 ,  C09B11/28 ,  C09B57/00

    Abstract: of the disclosure: A process for the preparation of xanthene dyestuffs of the general formula , (in which R1 and R2 are identical or different, each representing an optionally substituted aliphatic or optionally substituted araliphatic or cycloaliphatic radical, or R1 represents also a hydrogen atom or a carbocyclic aromatic or heterocyclic radical, or R1 and R2 together with the N-atom form a heterocyclic radical optionally containing further hetero-atoms, the benzene nucleus A may optionally contain substituents, and m stands for the integer 1,2, 3, 4 or zero) had been found wherein the inner salt of a 3,6-dihalogeno-9-(2'-sulfophenyl)-xanthene-9-ol of the formula (in which X stands for a halogen atom and A has the abovementioned meaning) is reacted with a primary or secondary amine of the formula , (in which R1 and R2 have the meanings specified as above) in a polar solvent which is free from acid groups; to obtain the sulfo compounds, the product is subsequently sulfonated. The improvement in this process is to carry out the reaction of the xanthenol with the amine in stoichiometrical amounts and in the presence of an inorganic acidbinding agent and/or an acid-binding tertiary aliphatic or cycloaliphatic amine, of pyridine or of a pyridine derivative. The novel process has the advantage of yielding dyestuffs of high quality with a strong color intensity and brilliancy, a high fastness to light and a uniform dyeing behaviour. Furthermore, the dyestuffs are obtained in very good yields avoiding the high charge of the waste water of present processes of the dyestuff itself or its starting components used in excess.

    7.
    发明专利
    未知

    公开(公告)号：MX173941B

    公开(公告)日：1994-04-11

    申请号：MX1639389

    申请日：1989-06-09

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  KUHN REINHARD ,  BUHLER ULRICH

    IPC: C09B67/22 ,  D06P1/18 ,  D06P3/54 ,  D06P3/87

    Abstract: A dye preparation in the form of a multiple component mixture or of a mixed crystal of disperse blue azo dyes, characterised in that it consists of the dyes of the formulae I and II … … and optionally of the formulae III and/or IV … … and also of the dyes of the formulae V and/or VI and/or VII and/or VIII … … or contains these.

    8.
    发明专利
    未知

    公开(公告)号：BR8604967A

    公开(公告)日：1987-07-14

    申请号：BR8604967

    申请日：1986-10-10

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  MISCHKE PETER ,  REITER JUTTA

    IPC: C09B62/51 ,  C09B67/22 ,  D06P1/384 ,  C09B62/45 ,  C09B67/24 ,  D06P3/66

    Abstract: Preparations containing or consisting essentially of a mixture of water-soluble reactive dyes of the formula (I) and (II) in a ratio of from 1:10 to 10:1 where R and R5 are each hydrogen, halogen, C1-C4-alkyl, C1-C4-alkoxy, carboxyl or sulpho, R , R , R and R are each hydrogen, halogen, C1-C4-alkyl or C1-C4-alkoxy, R is hydrogen or C1-C4-alkyl which may be substituted by hydroxyl, cyano or carboxyl, X and X are each vinyl, beta -chloroethyl, beta -sulphatoethyl, beta -thiosulphatoethyl or beta -phosphatoethyl, and Y , Y and Y are each ethylene, ethyleneoxy or methylethyleneoxy. The dye mixtures are suitable for dyeing or printing materials consisting of or containing cellulose fibres, and are notable for good water solubility and good affinity for the cellulose fibre.

    A PROCESS FOR DYEING A FIBER MATERIAL COMPOSED OF AN ACID-MODIFIED POLYMER OR COPOLYMER OF ACRYLONITRILE
    9.
    发明专利
    A PROCESS FOR DYEING A FIBER MATERIAL COMPOSED OF AN ACID-MODIFIED POLYMER OR COPOLYMER OF ACRYLONITRILE 未知

    公开(公告)号：IN159608B

    公开(公告)日：1987-05-30

    申请号：IN763CA1981

    申请日：1981-07-09

    Applicant: HOECHST AG

    Inventor： HAHNKE MANFRED ,  MOHR REINHARD ,  HOHMANN KURT

    IPC: D06P3/76 ,  C09B23/16 ,  C09B26/04 ,  C09B44/00 ,  C09B57/06 ,  C09B69/00 ,  D01F1/06 ,  D01F6/18 ,  D06F1/06 ,  D06P1/41 ,  D06P3/70 ,  D06P1/00 ,  D06P1/42 ,  D06P3/18

    Abstract: Fiber material composed of acid-modified homopolymers or copolymers of acrylonitrile (PAC fibers) which has been obtained by a wet spinning process, has not been dried and is still in a swollen condition (gel form), can be dyed advantageously and in fast colors by means of soluble dyes, the molecule of which contains several groups, namely more than one quaternary grouping and/or a strongly basic grouping carrying no charge, which exert a basic action towards the acid groups of the fiber substance. The chromophore of this colorant can belong to the category of monoazo or diazo dyes, methine, azamethine or diazamethine dyes or naphthalactam dyes. In accordance with the invention, after substantially removing the non-aqueous spinning solvent by washing, the spun material, as a moist gel, is dyed continuously or discontinuously from an aqueous dyebath; the fibers can be stretched before the dye is applied, during the dyeing process itself or immediately afterwards. By virtue of their special nature, the dyes of the type designated above, which have a strong fixing action, produce optimum fixing rates when dyeing PAC gels and, in the subsequent production stages, do not cause any noticeable soiling, as a result of dye which has bled out, on components of machines and operating baths, such as stretching or after-treatment baths. Investigations of penetration of the fiber by the dye, of the fixing rate and of the resulting fastness properties, such as fastness to wet processing, have shown no disadvantages compared with conventional dyes.

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