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Modified MDI-TMP (Diphenyl-Methane-Diisocyanate-Trimethylol Propane) type pilling resistant polyurethane finishing liquor

An anti-pilling and polyurethane technology, applied in the chemical field, can solve the problems of great harm to the human body and no anti-pilling, and achieve the effect of reducing damage and reducing the content of free TDI.

Inactive Publication Date: 2012-03-28
WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional polyurethane finishing for textiles also uses TDI (toluene diisocyanate) as raw material, but TDI is very harmful to the human body. %; At the same time, general water-based polyurethane is used in textiles, and it does not have anti-pilling performance

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0009] 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.

[0010] Add 50KG of ethyl acetate and 30KG of MDI into a reaction kettle filled with nitrogen or carbon dioxide, heat and stir to dissolve, then slowly add 12KG of TMP and a small amount of dibutyltin dilaurate, until completely dissolved and stirred evenly, continue to add 6KG Polyether 3000, and reacted at 70°C for 3 hours to obtain a polyurethane prepolymer; then slowly added sodium bisulfite, and reacted for 2 hours, and finally adjusted the pH to 4.5 with triethylamine;

[0011] After testing, the obtained product is a light yellow liquid, the content of -NCO measured by the toluene-di-n-butylamine method is 8.9%, and the content of TDI monomer is less than 0.05%, and the product is used for fabrics according to the GB / T 4802.1-1997 standard The fabric was measured to ...

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PUM

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Abstract

The invention discloses a modified MDI-TMP (Diphenyl-Methane-Diisocyanate-Trimethylol Propane) type pilling resistant polyurethane finishing liquor. The finishing liquor is obtained by the following steps of: (a) adding 30-50 % (molar) of organic solvent and 20-40 % (molar) of MDI (Diphenyl-Methane-Diisocyanate) to a reaction kettle full of nitrogen or carbon dioxide; and heating and stirring the mixture to dissolve the mixture; (b) and then slowly adding 10-20 % (molar) of TMP (Trimethylol Propane) and a catalyst quantity of catalyst; continuing to add 5-15 % (molar) of polyether 3000; and carrying out reaction at 70 DEG C to obtain a polyurethane prepolymer; (c) and then continuing to slowly add a sodium hydrogensulfite aqueous solution; and carrying reaction for 2-3 h; and (d) finally, adjusting the pH value by using triethylamine to obtain the finishing liquor. According to the invention, because the low-toxic MDI is adopted, the free TDI content is largely reduced so that the harm to human health is reduced; and the finishing liquor is applied to the fabric so that excellent pilling resistance can be obtained.

Description

technical field [0001] The invention belongs to the field of chemistry, in particular to a modified polyurethane prepolymer. Background technique [0002] Polyurethane has a wide range of uses, especially in the fields of synthetic fibers and textile finishing agents, because of its good mechanical properties, toughness, wear resistance, plumpness, and brightness, and can be cured at low temperature. Water-soluble polyurethane uses water as the medium, which is safe and non-flammable. It retains the excellent performance of traditional solvent-based polyurethane, and at the same time can give fabrics excellent softness, fullness, washability, wear resistance, good resilience, and smoothness. However, the traditional polyurethane finishing for textiles also uses TDI (toluene diisocyanate) as raw material, but TDI is very harmful to the human body. %; At the same time, general water-based polyurethane is used in textiles, and it does not have anti-pilling performance. Conte...

Claims

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Application Information

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IPC IPC(8): D06M15/564
Inventor 钱华张宁荣
Owner WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
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