Reactive aqueous polyurethane fabric finishing agent, its preparation method and application

A technology of water-based polyurethane and fabric finishing agent, which is applied in the preparation of fabric finishing agents, and in the field of fabric finishing agents composed of water-based polyurethane, which can solve the problems of non-washing resistance and long-lasting effect of water-based polyurethane, and achieve high washing resistance and excellent recovery Functionality, good flattening and crease retention

Active Publication Date: 2005-12-07
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the above that if a new fabric finishing agent can be prepared on the basis of water-based polyurethane, it can overcome the shortcomings of the current water-based polyurethane that the effect is not long-lasting and is not resistant to washing, and at the same time have the above-mentioned advantages of water-based polyurethane, which can make the fabric produce shape memory. , then this fabric finishing agent will have broad application prospects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Put 100g polypropylene glycol (molecular weight 2000, dried), 40g isophorone diisocyanate and 6.7g dimethylolpropionic acid into a four-necked round-bottomed flask equipped with reflux condenser, thermometer and stirrer in turn, and pass nitrogen protection , Stirring, adding 30ml of dimethylformamide solvent, reacting at a constant temperature of 75°C for 2-3 hours to prepare a PU prepolymer. The temperature was increased to 85° C., 6 g of methyl ethyl ketoxime was added, and two drops of dibutyltin laurate catalyst were added, and the reaction was carried out for 2 hours. Lower the temperature of the reactant to 50°C, add 4.5 g of triethylamine for neutralization, and add water to stir and invert phases to obtain a blocked waterborne polyurethane with a solid content of 25%.

Embodiment 2

[0038] Put 50g polytetrahydrofuran (molecular weight 2000, dried), 22g diphenylmethane diisocyanate and 6g dimethylolpropionic acid into a four-necked round-bottomed flask equipped with reflux condenser, thermometer and stirrer in turn, and pass nitrogen protection. Stir, add 50ml methyl ethyl ketone solvent, react at a constant temperature of 80°C for 2-3 hours to prepare a PU prepolymer. The temperature was raised to 85°C and 2 g of hydroxyethyl methacrylate was added, and the reaction was performed until the characteristic absorption peak of NCO radical (2270 cm-1) disappeared. Lower the temperature of the reactant to 50°C, add 4.5 g of triethylamine for neutralization, add water and stir to invert the phase, and finally extract the methyl ethyl ketone under reduced pressure to obtain a water-based polyurethane with a solid content of 30% containing double bonds.

Embodiment 3

[0040] Put 95g polycaprolactone (molecular weight 4000, dried), 21g diphenylmethane diisocyanate, 5.5g dimethylolpropionic acid and 100ml dimethylformamide solvent into a reflux condenser, thermometer and agitator in turn The four-neck round-bottomed flask was filled with nitrogen, stirred, and reacted at a constant temperature of 80°C for 2-3 hours to prepare a PU prepolymer. The temperature was raised to 90°C and 4g of benzyl alcohol was added to the reaction until the characteristic absorption peak of NCO radical (2270cm-1) disappeared. Lower the temperature of the reactants to 50°C, and add a small amount of acetone or no solvent. Add 4g of triethylamine to neutralize, and add water to stir and invert phases to obtain a blocked waterborne polyurethane with a solid content of 15%.

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Abstract

This invention relates to an aquosity polyurethane with end-closed or polyurethane structure preparing process and finishing method for preventing the fabric from winkle and distortion, which has a new application being used as finishing agent. The agent adopts prepolymer aggregating and end terminating technology to make out stable aquosity polyurethane with response type end group, whose emulsion particle diameter ranges from 50 to 500 nm and can be adjusted. The invention has functions of high adhesive strength, good impact resistance, hydrolytic resistance and shape memorization.

Description

Technical field [0001] The present invention relates to a new type of fabric finishing agent, in particular to a fabric finishing agent composed of water-based polyurethane with a blocked or unsaturated bond structure. The invention also relates to a preparation method of the fabric finishing agent and a method for finishing fabrics by using the finishing agent. Background technique [0002] At present, most traditional fabric anti-wrinkle finishing agents use formaldehyde resins, such as DMEHU, 2D, etc. After finishing the fabrics with such textile finishing agents, the anti-wrinkle and shrink-proof performance of the fabric can be improved to a certain extent; but this type of finishing The agent has a big defect, that is, it releases formaldehyde that seriously damages human health during the finishing and wearing process. Finishing the fabric with epoxy resin, bishydroxyethyl sulfone, organosilicon, vinyl monomer grafting agent, etc. Although it can solve the problem of forma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564
Inventor 胡金莲刘冶球
Owner THE HONG KONG POLYTECHNIC UNIV
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