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Preparation method for colorful polyurethane and artificial leather

A technology of polyurethane and water-based polyurethane, applied in coating, textile and papermaking, etc., can solve the problems of low compatibility and fastness of direct mixing method, complicated preparation process, etc., and achieve good application prospects, simple process and good dispersion. The effect of stability

Pending Publication Date: 2019-07-23
ZHEJIANG MEISHENG IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct mixing method has the problems of low compatibility and fastness, and the covalent bonding method has the problem of complicated preparation process.

Method used

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  • Preparation method for colorful polyurethane and artificial leather
  • Preparation method for colorful polyurethane and artificial leather
  • Preparation method for colorful polyurethane and artificial leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) prepare the regenerated cellulose suspension that concentration is 0.5wt% by phosphoric acid method;

[0031] 2) Mix 0.1g of reactive red 194 dye, 45g of the regenerated cellulose suspension prepared in step 1), 3g of sodium chloride, 1.2g of sodium carbonate and an appropriate amount of water in a total of 50mL, and heat up at a rate of 2°C / min To the color fixing temperature of 70°C, after dyeing for 90 minutes, the stock solution of the colored regenerated cellulose suspension is obtained;

[0032] 3) Use deionized water to fully wash the stock solution by filtration or centrifugation to remove unfixed reactive dyes to obtain the final red regenerated cellulose suspension;

[0033] 4) Take 10g of the red regenerated cellulose suspension obtained in step 3), mix with 30g of anionic water-based polyurethane emulsion and a total of 50mL of an appropriate amount of water, and mix uniformly, wherein the concentration of the red regenerated cellulose suspension is 1wt%,...

Embodiment 2

[0037] 1) preparing a regenerated cellulose suspension with a concentration of 1 wt% by the sodium hydroxide / urea method;

[0038] 2) Mix 0.1g of reactive yellow 145 dyestuff, 60g of the regenerated cellulose suspension prepared in step 1), 3g of sodium chloride, 1.2g of sodium carbonate and an appropriate amount of water in a total of 70mL, and heat up at a rate of 3°C / min To the color fixing temperature of 80°C, after dyeing for 60 minutes, the stock solution of the colored regenerated cellulose suspension is obtained;

[0039]3) Use deionized water to fully wash the stock solution by filtration or centrifugation to remove unfixed reactive dyes to obtain the final yellow regenerated cellulose suspension;

[0040] 4) Take 10g of the yellow regenerated cellulose suspension obtained in step 3), mix with 20g of anionic water-based polyurethane emulsion and a total of 50mL of an appropriate amount of water, and mix evenly, wherein the concentration of the yellow regenerated cellu...

Embodiment 3

[0044] 1) preparing a regenerated cellulose suspension with a concentration of 1.5 wt% by an ionic liquid method;

[0045] 2) Mix 0.1g of reactive blue 19 dye, 75g of the regenerated cellulose suspension prepared in step 1), 3g of sodium chloride, 1.2g of sodium carbonate and an appropriate amount of water in a total of 80mL, and heat up at a rate of 1°C / min To the color fixing temperature of 50°C, after dyeing for 120 minutes, the stock solution of the colored regenerated cellulose suspension is obtained;

[0046] 3) Use deionized water to fully wash the stock solution by filtration or centrifugation to remove unfixed reactive dyes to obtain the final blue regenerated cellulose suspension;

[0047] 4) Take 10 g of the blue regenerated cellulose suspension obtained in step 3), mix with 10 g of anionic water-based polyurethane emulsion and a total of 50 mL of an appropriate amount of water, and mix uniformly, wherein the concentration of the blue regenerated cellulose suspensio...

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Abstract

The invention discloses a preparation method for colorful polyurethane. Colorful regenerated cellulose suspension and waterborne polyurethane emulsion are mixed to obtain colorful waterborne polyurethane emulsion. The invention also discloses a preparation method for colorful artificial leather. According to the preparation method, the colorful waterborne polyurethane with rich colors can be obtained, and the colorful waterborne polyurethane is applied to the dyeing technology of ultrafine fiber artificial leathers. Compared with an existing processing method for polyurethane resin added withcolor paste, the preparation method disclosed by the invention has the advantages that the abrasion resistance firmness of the artificial leather can be improved, and the use application of the artificial leather can be greatly widened.

Description

technical field [0001] The invention belongs to the technical field of paint preparation and fiber dyeing, and in particular relates to a method for preparing colored polyurethane and a method for preparing colored artificial leather by using the same. Background technique [0002] Solvent-based polyurethane is a polymer material widely used at present. It has good wear resistance, water resistance and corrosion resistance. However, with the improvement of people's awareness of environmental protection, solvent-based polyurethane no longer meets people's environmental protection requirements. Requirements, so the development of safe, non-toxic, green and environmentally friendly water-based polyurethane is the future development direction. Water-based polyurethane uses water as the dispersion medium. It has excellent abrasion resistance, flexibility, corrosion resistance, good chemical stability and comprehensive performance equivalent to solvent-based polyurethane. Therefor...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L1/08C08B15/05C08B15/06D06N3/00D06N3/14
CPCC08B15/05C08B15/06C08L75/04D06N3/0004D06N3/0011D06N3/0088D06N3/14D06N2203/026D06N2209/0823D06N2209/083D06N2209/1621D06N2209/1678D06N2209/1685D06N2211/28C08L1/08
Inventor 隋晓锋钱国春丁雷李祥王亚停
Owner ZHEJIANG MEISHENG IND
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