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Water-based nano synthetic leather slurry and method for manufacturing nano synthetic leather

A manufacturing method and technology for synthetic leather, applied in textiles, papermaking, fiber processing, etc., can solve the problems of low air permeability and moisture permeability of synthetic leather, not resistant to yellowing, easy to grow mildew, etc., and achieve excellent antibacterial and mildew resistance, good Effects on storage stability

Inactive Publication Date: 2010-10-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the domestic water-based polyurethane has not fundamentally solved the three major problems of synthetic leather, such as low air permeability, moisture permeability, mildew, and yellowing resistance.
At present, there are many synthetic leather products with high air permeability and moisture permeability, antibacterial and anti-mildew or anti-ultraviolet functions, but the products have single functions and often lose sight of others in terms of performance.
In the research of nano-synthetic leather, the method of adding nano-powder is mostly used, and the problem of agglomeration of nano-particles cannot be fundamentally solved.
The invention adopts the method of in-situ hybridization to uniformly introduce nano-scale inorganic particles into the water-based polyurethane slurry, and the nano-synthetic leather produced by the slurry has excellent antibacterial and mildew resistance, yellowing resistance and water vapor permeability property, so far no patent literature and non-patent literature reports

Method used

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  • Water-based nano synthetic leather slurry and method for manufacturing nano synthetic leather

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1 water-based polyurethane / nano-SiO 2 Preparation of complex emulsion

[0043] 100 parts of isophorone diisocyanate, 200 parts of polytetrahydrofuran diol (number average relative molecular weight 2000), 25 parts of castor oil and 4 parts of diethylene glycol were added at room temperature with a stirrer, thermometer and reflux In the reaction vessel of the condenser tube, add 0.35 parts of diisobutyltin dilaurate, react at a temperature of 80-85°C for 2 hours, add 20 parts of dimethylol propionic acid (dissolved with N-methylpyrrolidone), and react at a temperature of 70-75°C ℃ to continue the reaction for 2 hours to obtain a polyurethane prepolymer; cool the prepolymer to 40°C, add 16 parts of triethylamine to neutralize the reaction for 20 minutes, add 44 parts of ethyl orthosilicate precursor solution (made from 24 parts of ethyl orthosilicate and 20 parts of N-methylpyrrolidone), stirred for 30 minutes, and finally added 530 parts of deionized water to emulsify fo...

Embodiment 2

[0055] 1 water-based polyurethane / nano-SiO 2 Preparation of complex emulsion

[0056] 100 parts of toluene diisocyanate, 230 parts of polyoxypropylene diol (number average relative molecular weight 2000), 2 parts of glycerin and 3 parts of 1,4-butanediol were added at room temperature with a stirrer, thermometer and reflux condenser In a reaction vessel, react at a temperature of 70 to 75°C for 2 hours, add 20 parts of dimethylol butyric acid (dissolved in N,N-dimethylacetamide), and continue to react at a temperature of 65 to 70°C for 2 hours to obtain polyurethane pre- polymer; cool the prepolymer to 20°C, add 14 parts of triethylamine to neutralize the reaction for 30 minutes, add 145 parts of orthobutyl silicate precursor solution (composed of 85 parts of orthobutyl silicate and 60 parts of N, N-di methyl acetamide), stirred for 30 minutes, and finally added 670 parts of deionized water to emulsify for 2 hours under high-speed stirring, and added 2.6 parts of ethylenediam...

Embodiment 3

[0068] 1 water-based polyurethane / nano-SiO 2 Preparation of complex emulsion

[0069] 28 parts of hexamethylene diisocyanate, 72 parts of isophorone diisocyanate, 60 parts of polyoxypropylene diol (number average relative molecular weight 1000), 150 parts of polytetrahydrofuran diol (number average relative molecular weight 2000), 22 parts Add castor oil and 2 parts of ethylene glycol into a reaction vessel with a stirrer, a thermometer and a reflux condenser at room temperature, add 0.4 parts of diisobutyltin dilaurate, react at a temperature of 75-80°C for 2 hours, and add 16 parts Dimethylol propionic acid (dissolved with N, N-dimethylformamide), continue to react for 2 hours to obtain a polyurethane prepolymer; cool the prepolymer to 30°C, add 12 parts of triethylamine to neutralize the reaction for 20 minutes, Add 180 parts of ethyl orthosilicate precursor solution (100 parts of ethyl orthosilicate and 80 parts of N,N-dimethylformamide), stir for 30 minutes, and finally ...

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Abstract

The invention discloses water-based nano synthetic leather slurry and a method for manufacturing nano synthetic leather. The method is characterized by comprising the following steps of: uniformly mixing 100 weight parts of water-based polyurethane / nano SiO2 or TiO2 emulsion with solid content of 25 to 40 weight percent, 15 to 22 weight parts of filler, 0.1 to 0.5 weight part of leveling agent, 0.1 to 0.5 weight part of antifoaming agent and 0.1 to 0.3 weight part of thickening agent to prepare nano composite slurry; uniformly scraping the water-based polyurethane / nano SiO2 or TiO2 emulsion on release paper by using a transfer method, drying the release paper in a blowing dry box at the temperature of between 100 and 130 DEG C, and cooling the release paper by using a cooling roller at a linear speed of between 15 and 20m / min; scraping a second layer of the water-based polyurethane / nano SiO2 or TiO2 emulsion on the release paper, drying and cooling the second layer under the same conditions; scraping a third layer of the water-based polyurethane / nano SiO2 or TiO2 emulsion, and drying the third layer in the blowing dry box at the temperature of between 100 and 110 DEG C; laminating base cloth on the coating layer of the release paper in a semi-dry state at the linear speed of between 15 and 20 m / min; drying the coating in the blowing dry box at the temperature of between 100 and 130 DEG C at the linear speed of between 15 and 20m / min; and separating the paper from the leather and rolling up the paper and the leather respectively to prepare the nano synthetic leather.

Description

technical field [0001] The invention relates to a water-based nano-synthetic leather slurry and a manufacturing method of the nano-synthetic leather, belonging to the field of synthetic leather material technology and synthetic leather manufacturing. Background technique [0002] Polyurethane synthetic leather has excellent wear resistance, cold resistance, good tear strength and elongation, and at the same time has the characteristics of soft and natural luster, full hand feeling, comfortable, good recovery, moderate price, washable, etc., and it is easy to process , low price and other characteristics, so that polyurethane synthetic leather becomes an ideal imitation leather product. Polyurethane synthetic leather not only replaces many expensive natural leather products, but also gradually replaces low-grade and cheap PVC artificial leather, and has become an indispensable consumer product in people's daily life. However, at present, in the production process of polyuret...

Claims

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Application Information

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IPC IPC(8): D06M15/564D06M11/79D06M11/46C08G18/66C08G18/12D06N3/14
Inventor 范浩军张秀丽陈意石欢欢王姗姗石碧
Owner SICHUAN UNIV
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