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Preparation method for vulcanized reactive dye

A dye, sodium polysulfide technology, applied in the field of clothing, can solve the problem of not bright enough color and so on

Inactive Publication Date: 2012-06-27
苏州贵族公子服饰有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost is low, and the dyed products are generally washable and light-resistant, but the color is not bright enough

Method used

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Experimental program
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Embodiment Construction

[0009] The preparation method of a kind of vulcanized vat dye of the present invention, it is to use 2,4-dinitrochlorobenzene and sodium hydroxide solution under the situation of near boiling, hydrolyze and make sodium dinitrophenolate solution, then mix with Sodium polysulfide aqueous solution is heated and boiled according to a certain molecular ratio, and it is prepared by reducing and adding sulfur under pressure or without pressure. After the sulfur addition reaction is completed, it is directly dried with a roller drier to obtain the original dye. Then blended into commercial dyes. During vulcanization, the molecular ratio of sodium phenate to sodium polysulfide, x in sodium polysulfide Na2Sx (i.e. sulfur index) and reaction temperature are different, so that the color light of the sulfur black finished product is blue, blue and red. The biggest disadvantage of sulfur black dye is the phenomenon of brittle cloth. This is because sulfur black molecules contain polysulfi...

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Abstract

The invention discloses a preparation method for vulcanized reactive dye, which comprises the following steps: under the condition that 2,4-dinitrochlorobenzene and sodium hydroxide solution are near boiling, hydrolyzing to prepare the dinitrophenol sodium solution; then, heating and boiling the dinitrophenol sodium solution with sodium polysulfide aqueous solution at a certain molecular ratio; under the condition of pressurization or non pressurization, reducing and carrying out sulphureting reaction to prepare; after sulphureting reaction is finished, drying directly by a roller drier to obtain raw dye; and splicing and mixing to obtain commodity dye. The preparation method for the vulcanized reactive dye has the beneficial effect that sodium sulfide or sodium hydrosulfite is used for reducing into a water-soluble leuco body when the vulcanized dye is used, and the water-soluble leuco body is adsorbed by a dyed object to be changed into the original insoluble colored object by the oxidation or other actions to fix the dye on the dyed object.

Description

technical field [0001] The invention relates to the field of clothing, in particular to a method for preparing sulfur vat dyes. Background technique [0002] Sulfur dyes are dyes to be dissolved in alkali sulfide. They are mainly used for dyeing cotton fibers, and can also be used for cotton / dimensional blended fabrics. The cost is low, and the dyed products are generally washable and light-resistant, but the color is not bright enough. Commonly used varieties are sulfur black, sulfur blue and so on. Soluble sulfur dyes are now available. The dyes produced by the vulcanization reaction of amines, phenols or nitro compounds of aromatic hydrocarbons with sulfur or sodium polysulfide were first synthesized by French chemists Crusian and Bretonnier. [0003] The patent application document with application number 96110039 discloses a new sulfur dye, which includes at least one sulfur dye intermediate of formula (I) in its preparation; wherein R↓[1] and R are independently nit...

Claims

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Application Information

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IPC IPC(8): C09B49/02
Inventor 陈名洪
Owner 苏州贵族公子服饰有限公司
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