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A kind of waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and preparation method thereof

A water-based polyurethane, waterproof and moisture-permeable technology, used in textiles and papermaking, etc., can solve the problems of no waterproof and moisture-permeable performance, no antibacterial performance, complicated process, etc., to avoid the influence of emulsion stability, and to achieve excellent waterproof and moisture-permeable performance. , the effect of broad development prospects

Active Publication Date: 2022-07-12
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing waterproof and moisture-permeable water-based polyurethane often introduces a large number of ethylene oxide groups into the main chain to obtain the waterproof and moisture-permeable effect, but this type of coating adhesive has poor mechanical properties and high water absorption, which loses its application value; existing The antibacterial agent is usually compounded with water-based polyurethane emulsion by physical blending to achieve antibacterial effect, but the antibacterial agent has a great influence on the stability of the emulsion
[0004] Chinese patents CN111848911A and CN113061227A disclose a waterproof and moisture-permeable water-based polyurethane, but they all use carboxylic acid monomer as a hydrophilic chain extender, and the anionic water-based polyurethane prepared has no antibacterial properties, and it is difficult to carry out the same process with guanidine antibacterial agents. compound
[0005] Chinese patent CN110983801A discloses a preparation method of waterproof and moisture-permeable cotton fabric, which is prepared by blending water-based polyurethane with modified fumed silica and anionic chain extender. The experimental steps are cumbersome and have no antibacterial properties.
[0006] Chinese patent CN112126336A discloses an antibacterial and mildew-proof water-based polyurethane coating and its preparation method. Silver nitrate solution is added to give water-based polyurethane antibacterial properties, but the cost is high and there is no waterproof and moisture-permeable performance.
[0007] Chinese patent CN104727150A discloses a waterproof, moisture-permeable, anti-bacterial, anti-ultraviolet water-based polyurethane material and its preparation method. The silver-loaded titanium dioxide is modified with a silane coupling agent to endow the water-based polyurethane with antibacterial properties. The process is cumbersome, the cost is high, and the industrialization is difficult.

Method used

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  • A kind of waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and preparation method thereof
  • A kind of waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and preparation method thereof
  • A kind of waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0030] The hydrophilic end-capping agents used in Examples 1-3 were all prepared according to the following steps:

[0031] 2.7kg monohydroxycarboxylic acid (specifically malic acid MA in Example 1-3), 14kg low molecular weight polyether alcohol (specifically MPEG in Example 1-3, Mn=350) and 0.2kg catalyst (Example 1 -3, specifically p-toluenesulfonic acid) was dissolved in 80 L of toluene, reacted at 140 °C for 24 h, and after the reaction was completed, the solvent was evaporated at 55 °C to obtain a polyethylene oxide group-containing hydrophilic end-capping agent (MMPEG) .

Embodiment 1

[0033] The preparation of waterproof and moisture-permeable water-based polyurethane emulsion: 10kg of polymer polyol (specifically selected polycaprolactone diol PCL in this example, Mn=1000, the same as in Examples 1-3), 2kg of organosilicon (in this example) Specifically, hydroxypropyl-terminated polydimethylsiloxane PDMS was selected, Mn=1000, the same as in Example 1-3), added to the reactor at 120 °C for vacuum dehydration for 2 h, and 7.8 kg of aliphatic diisocyanate (specific in this example) was added. is isophorone diisocyanate (IPDI), react at 90°C for 2h; cool down to 50°C, add 1.35kg small molecule chain extender (specifically 1,4-butanediol BDO in this embodiment) and 7g organotin catalyst ( In this example, it is specifically stannous octoate T-9), reacted at 75°C for 3h, and added 5kg of acetone during the reaction to adjust the viscosity; cooled to 50°C, added 3.7kg of the hydrophilic end capping agent MMPEG, followed by the reaction for 3h; lowered to 30°C Ne...

Embodiment 2

[0037] A method for preparing a waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive, wherein the precoat layer is composed by weight: 80 parts of a waterproof and moisture-permeable water-based polyurethane emulsion, 0.15 parts of a silicone-based defoamer, and a polyurethane associative thickener. 1.5 parts of agent, 2 parts of polyhexamethyleneguanidine hydrochloride.

[0038] Preparation of waterproof and moisture-permeable water-based polyurethane emulsion: add 10kg PCL and 2kg PDMS to the reactor for vacuum dehydration at 120°C for 2h, add 7.8kg IPDI, and react at 90°C for 2h; cool down to 50°C, add 1.35kg BDO and 7g T-9 , react at 75°C for 3h, and add 5kg of acetone during the reaction to adjust the viscosity; cool to 50°C, add 5kg of MMPEG, and then react for 3h; drop below 30°C, add 61kg of 5% tannic acid aqueous solution for high-speed shear emulsification for 20min , and after removing the acetone, a waterproof and moisture...

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Abstract

The invention discloses a waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and a preparation method thereof, and relates to the technical field of textile coating adhesives. 80-100 parts of moisture-permeable water-based polyurethane emulsion, 0.15-0.2 parts of defoamer, 1.5-2 parts of thickener, and 2-3 parts of guanidine antibacterial agent; the coating adhesive prepared by the present invention has a soft coating during use. It has the advantages of high strength, good waterproof and moisture permeability, and good antibacterial performance. It has a good application prospect in the field of waterproof and moisture permeable antibacterial waterborne polyurethane fabric coating adhesive.

Description

Technical field: [0001] The invention relates to the technical field of textile coating adhesives, in particular to a waterproof, moisture-permeable, antibacterial, water-based polyurethane fabric coating adhesive and a preparation method thereof. Background technique: [0002] Waterborne polyurethane is widely popular because it contains little or no volatile organic compounds, and has a place in textiles, leather and other fields. Waterproof, moisture-permeable and antibacterial water-based polyurethane fabric coating refers to the coating of waterproof, moisture-permeable and antibacterial water-based polyurethane on the surface of the fabric, which not only gives the fabric the function of waterproof and moisture-permeability, but also gives the fabric antibacterial properties, so that it can effectively block in rainy and snowy weather. The penetration of external water droplets allows the perspiration of the human body to pass through after exercise, and has a steriliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14D06N3/00C08G18/75C08G18/66C08G18/61C08G18/42C08G18/32C08G18/28
CPCD06N3/14D06N3/148D06N3/0059C08G18/755C08G18/664C08G18/4277C08G18/61C08G18/283C08G18/3206D06N2209/142D06N2209/1671D06N2209/126
Inventor 杨建军夏雪婷吴庆云吴明元张建安刘久逸
Owner ANHUI UNIVERSITY
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