- Preparation method of dye intermediate applicable to digital jet printing or dyeing
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The invention relates to a preparation method of a dye intermediate applicable to digital jet printing or dyeing. The active dye intermediate is 2-carboxyl-4-beta sulfonylsulfone ethyl sulfate-aniline. The method comprises the following steps of (1) acetylation; (2) sulfochlorination; (3) reduction; (4) hydroxyethylation; (5) esterification hydrolysis. The dye intermediate prepared by the method is applicable to synthesis of digital jet printing or dyeing.
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- Intermediate capable of improving color fixing rate and solubility of dye, and preparation method thereof
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The invention relates to an intermediate capable of improving the color fixing rate and the solubility of a dye, and a preparation method thereof, wherein the structural formula of the reactive dye intermediate is represented by a formula (I) defined in the specification. According to the present invention, the carboxyl group is introduced into the ortho-position of the para-ester to form the structure of the intermediate, the activity of the intermediate is between the para-ester and the sulfonated para-ester, and the application range is wide.
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Paragraph 0029-0036
(2019/02/13)
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- Active dark blue dyestuff for digital inkjet printing and preparation method thereof
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The invention relates to active dark blue dyestuff for digital inkjet printing and a preparation method thereof. A molecular structure general formula of the active dark blue dyestuff for the digitalinkjet printing is shown as a formula (I): the formula (
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Paragraph 0151; 0154; 0155; 0156; 0157; 0158
(2019/01/14)
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- Navy blue reactive dye
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The invention relates to a navy blue reactive dye and provides a structural formula and preparation method of the navy blue reactive dye. The dye prepared by the invention is high in color fixing rate, high in solubility, good in freezing resistance, diff
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Paragraph 0159-0166
(2019/02/06)
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