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Water-soluble MDI (4,4-Diphenylmethane Diisocyanate)-TMP(Trimethoprim) type polyurethane dye liquor and application thereof

A polyurethane and water-soluble technology, applied in the textile field, can solve the problems of poor affinity, inability to obtain dyeing effect, poor color fastness to washing of dyed silk, etc., and achieve the effect of improving binding force and color fastness to washing

Inactive Publication Date: 2012-05-02
WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid dyes are usually used in printing and dyeing, but they are only suitable for wool dyeing. When dyeing real silk, due to their poor affinity, the color fastness to washing of dyed silk is poor, so it is impossible to obtain better dyeing results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] The technical solutions of the present invention will be described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited to the examples.

[0009] In a reactor filled with nitrogen, add ethyl acetate and MDI. After stirring and dissolving, slowly add TMP step by step. When the temperature is about 20°C, add a small amount of sodium bisulfite, and adjust the pH to 4.5; finally raise the temperature to 45°C, add weak acid dye B-NG (commercially available) and 2g / L sodium sulfate, and get Water-soluble MDI-TMP type polyurethane dyeing solution.

[0010] Soak the real silk in the above-mentioned water-soluble MDI-TMP polyurethane dyeing solution, the concentration of the water-soluble MDI-TMP polyurethane dyeing solution is 30g / L, take out the real silk for rolling treatment, and dry it at 80°C for 3min , and then at 170 ° C for 2 min.

[0011] According to the GB / T3921-1997 standard, the dyed silk is tested and...

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PUM

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Abstract

The invention discloses a water-soluble MDI (4,4-Diphenylmethane Diisocyanate)-TMP(Trimethoprim) type polyurethane dye liquor and application thereof. The water-soluble MDI-TMP type polyurethane dye liquor is prepared by the following steps of: a, preparing polyurethane: adding ethyl acetate and MDI into a reaction kettle filled with nitrogen gas or carbon dioxide; after the mixture is fully dissolved by stirring, slowly adding TMP, heating and carrying out a pre-polymerizing reaction for 1-4 hours; after the temperature is reduced below 30DEG C, adding sodium bisulfite and carrying out an end-capping reaction for 1-2 hours, and finally, adjusting the pH value to be 4.5; and b, heating the polyurethane obtained in the step a to be 50-60DEG C and adding 5-8 weight percent of dye and 1-3g / L of sodium sulfate. According to the water-soluble MDI-TMP type polyurethane dye liquor disclosed by the invention, the bonding force of the dye on textile is greatly improved and the color fastness to washing of textile products is improved.

Description

technical field [0001] The invention belongs to the textile field, and in particular relates to a textile printing and dyeing finishing agent and a using method thereof. Background technique [0002] Polyurethane is widely used in textiles because of its good mechanical properties, toughness, wear resistance, plumpness and brightness, and can be cured at low temperature. Acid dyes are usually used in printing and dyeing, but they are only suitable for wool dyeing. When dyeing real silk, due to their poor affinity, the color fastness to washing of dyed silk is poor, so better dyeing effects cannot be obtained. Contents of the invention [0003] Purpose of the invention: In view of the above-mentioned defects, the present invention provides a water-soluble MDI-TMP polyurethane dye solution and its application method for dyeing real silk with acid dyes. [0004] Technical scheme: water-soluble MDI-TMP type polyurethane dye solution, which is obtained through the following st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/32C08G18/10D06M15/564
Inventor 钱华张林荣
Owner WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
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