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    3.
    发明专利
    未知

    公开(公告)号：DE3580650D1

    公开(公告)日：1991-01-03

    申请号：DE3580650

    申请日：1985-10-19

    Applicant: HOECHST AG

    Inventor： DUERL BERND ,  BOS JOHANNES ,  ONG SIENLING DR ,  RAFFEL PETER ,  BROZAT KURT

    IPC: D06P1/38 ,  D06P3/14 ,  D06P3/24 ,  D06P5/12

    Abstract: In the conventional discharge printing on polyamide fiber materials using acid dyes, above all, the very low wet and light fastness properties of the designs obtained in this manner are frequently an obstacle to the wide expansion of this interesting technique in practice. Applying this known patterning method for wool or nylon to resist prints made with reactive dyes being distinguished by better fastness level, does not always produce satisfactory white resist effects when, for example, sulfite compounds as the resist agent and reactive dyes having esterified beta -hydroxyethylsulfonyl groups as the reactive radical are taken into consideration; colored effects having a bright hue are not even possible at all in various cases. It has now been found that, using sulfite compounds and reactive dyes of the vinylsulfonyl type, the above mentioned difficulties can be remedied when, instead of the ester derivatives of said dyestuffs, according to this invention such dyes which have been converted before they are applied into the free vinylsulfonyl form, are brought to interaction with the preprinted resist agent to become immediately and completely desactivated and thus resulting unobjectionable resist effects at the respective places of the textile material.

    5.
    发明专利
    未知

    公开(公告)号：DE3439532A1

    公开(公告)日：1986-04-30

    申请号：DE3439532

    申请日：1984-10-29

    Applicant: HOECHST AG

    Inventor： DUERL BERND ,  BOS JOHANNES ,  ONG SIEN LING DR ,  RAFFEL PETER ,  BROZAT KURT

    IPC: D06P1/38 ,  D06P3/14 ,  D06P3/24 ,  D06P5/12

    Abstract: In the conventional discharge printing on polyamide fiber materials using acid dyes, above all, the very low wet and light fastness properties of the designs obtained in this manner are frequently an obstacle to the wide expansion of this interesting technique in practice. Applying this known patterning method for wool or nylon to resist prints made with reactive dyes being distinguished by better fastness level, does not always produce satisfactory white resist effects when, for example, sulfite compounds as the resist agent and reactive dyes having esterified beta -hydroxyethylsulfonyl groups as the reactive radical are taken into consideration; colored effects having a bright hue are not even possible at all in various cases. It has now been found that, using sulfite compounds and reactive dyes of the vinylsulfonyl type, the above mentioned difficulties can be remedied when, instead of the ester derivatives of said dyestuffs, according to this invention such dyes which have been converted before they are applied into the free vinylsulfonyl form, are brought to interaction with the preprinted resist agent to become immediately and completely desactivated and thus resulting unobjectionable resist effects at the respective places of the textile material.

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