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Preparation method of cation-type waterborne polyurethane wool anti-felting emulsion

A water-based polyurethane and cationic technology, which is applied in the direction of animal fibers, can solve the problems of not obvious improvement of dry or wet rubbing fastness of fabrics, accelerated yellowing of polyester fabrics, and no explanation of the strength of wool fabrics, etc., to achieve storage stability Excellent performance, adjustable solid content, and the effect of improving bursting strength

Inactive Publication Date: 2015-09-02
XINJIANG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if toluene diisocyanate is selected as the hard segment of the anti-pilling agent, it will accelerate the yellowing of polyester fabrics during high-temperature baking; although there are relatively many reports on color-fixing agents, some of them have no effect on dry or wet friction of fabrics. The fastness improvement effect is not obvious, and some have serious discoloration problems; and for wool fabric anti-shrinkage agents, there are only application examples of cationic water-based polyurethane modified with epoxy resin or silicone, but the synthesis process is complicated. There is no explanation for the strength of wool fabric after treatment

Method used

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  • Preparation method of cation-type waterborne polyurethane wool anti-felting emulsion
  • Preparation method of cation-type waterborne polyurethane wool anti-felting emulsion
  • Preparation method of cation-type waterborne polyurethane wool anti-felting emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Put 40.00 g of polypropylene glycol (PPG-2000) in a 500ml three-neck flask, raise the temperature to 110°C, and put it under vacuum (9.99×10 4 Pa) for 2 hours of dehydration, and lower the temperature to 70 °C. Add 20.00 g of isophorone diisocyanate (IPDI) into the reactor and raise the temperature to 80°C, and react for 2-3 hours (add 3-4 drops of catalyst diluted with acetone). When the system reacted for 2 h, the di-n-butylamine method was used to track the titration, and the reaction was stopped when -NCO reached the theoretical value of 8.70%. Cool down to about 50 °C and slowly add 7.00 g of N-methyldiethanolamine (MDEA) dropwise with a separatory funnel, and dilute with an appropriate amount of acetone depending on the viscosity of the system; after 1.5 h, cool down to 5 °C, add 7.00 g of sodium bisulfite ( SHS) reaction for 1.5 h, the capping rate was controlled above 95.0%; continue to heat up to 35 °C, add 4.00 g of glacial acetic acid for neutralization fo...

Embodiment 2

[0030] Put 30.00 g of PPG-2000 in a 500ml three-neck flask, raise the temperature to 110°C, 4 Pa) for 2 hours, then lower the temperature to 70°C. Add 11.00 g of IPDI into the reactor and raise the temperature to 80 °C, react for 2~3 h (drop 3~4 drops of catalyst diluted with acetone), and use the di-n-butylamine method to follow the titration when the system reacts for 2 h , stop this reaction when -NCO reaches the theoretical value of 6.52%. Cool down to about 50°C and slowly add 2.46g of MDEA dropwise with a separatory funnel, and add appropriate amount of acetone to dilute depending on the viscosity of the system. After 1.5 h, the temperature was lowered to 43 °C, and 2.50 g of methyl ethyl ketone oxime (MEKO) was added to react for 1.5 h, and the capping rate was controlled above 98.0%. Continue to add 1.90 g of glacial acetic acid for neutralization for 0.5 h, and then add 110 ml of deionized water to maintain the neutralization degree at 90~110%; use a rotation speed...

Embodiment 3

[0032] Put 45.00g of PPG-2000 in a 500ml three-neck flask, raise the temperature to 110°C, and under vacuum (9.99×10 4 Pa) for 2 hours, then lower the temperature to 70°C. Add 16.50 g of IPDI to the reactor and raise the temperature to 80 °C, react for 2~3 h (drop 3~4 drops of catalyst diluted with acetone), wherein, when the system reacts for 2 h, use the di-n-butylamine method to follow the titration , Stop this reaction when -NCO reaches the theoretical value of 6.63%. Cool down to about 50°C, slowly add 3.74 g of MDEA dropwise with a separatory funnel, and add appropriate amount of acetone to dilute depending on the viscosity of the system. After 1.5 h, the temperature was lowered to 43°C, and 4.00 g of MEKO was added to react for 1.5 h, and the capping rate was controlled above 98.0%. Then, 2.80 g of glacial acetic acid was added for neutralization for 0.5 h, and then 150 ml of deionized water was added to keep the neutralization degree at 90~110%; shear and emulsify...

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Abstract

The invention relates to a preparation method of cation-type waterborne polyurethane wool anti-felting emulsion, and belongs to the field of wool fabric finishing auxiliaries. According to the preparation method of the cation-type waterborne polyurethane wool anti-felting emulsion, polyisocyanate is used as a hard segment, polyether polyol is used as a soft segment, an amine compound is used as a cation chain extender and sodium hydrogen sulfite or methyl ethyl ketoxime is used as an end-capping reagent; the adopted technical route is pre-polymerization reaction-hydrophilic chain extending reaction-end capping reaction-neutralization reaction-self-emulsifying reaction. The anti-felting emulsion synthesized by a self-emulsifying method has the characteristics of being excellent in storage stability, adjustable in solid content and convenient to use, the size change of wool knitting fabrics caused by felting during washing is remarkably reduced, the bursting strength, dyeing depth and dyeing fastness of the wool knitting fabrics are improved, and good application prospect is provided.

Description

technical field [0001] The invention belongs to the field of chlorine-free anti-felting finishing agents for wool fabrics, and in particular relates to a preparation method of cationic water-based polyurethane wool anti-felting emulsion. Background technique [0002] Wool is an important textile raw material. It has good hygroscopicity, warmth retention, wrinkle resistance, durability and soft hand feeling. It is very popular among consumers. However, the directional friction effect (DFE) caused by wool scales makes the fabric prone to felting during machine washing, which greatly affects the dimensional stability and wearability of the fabric. Therefore, machine washing resistance has become a standard for high-end wool fabrics . At present, many sets of non-chlorine processes have been formed for wool anti-felting finishing, but none of them can compare with the traditional chlorinated Hercosite resin finishing method. A novel anti-felting finish that produces adsorbable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568C08G18/75C08G18/83C08G18/66C08G18/48C08G18/32D06M101/12
Inventor 贾丽霞刘瑞胡亚君刘和平冯存富
Owner XINJIANG UNIVERSITY
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