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Solvent-free type polyurethane nanometer TiO2 composite membrane and preparation method thereof

A polyurethane film and solvent-free technology, which is applied in the field of solvent-free polyurethane nano-TiO2 composite film and its preparation, can solve problems such as poor water resistance, poor high temperature resistance, and ecological environment pollution, and achieve environmental pollution and product safety issues , Put an end to ecological environment pollution problems, and the effect of eliminating pollution sources

Inactive Publication Date: 2017-07-25
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional solvent-based polyurethane film production process, the volatilization of a large amount of organic solvents used in the production process causes serious ecological environmental pollution, and polyurethane has poor self-thickening properties, low solid content, poor high temperature resistance, poor water resistance and high cost. advanced defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0028] Weigh 5 parts by mass of polyethylene glycol (PEG) and 6 parts by mass of TiO 2 Add it into a three-necked flask equipped with a stirring device and a reflux condensing device, heat and stir at 50°C for 70 minutes, and use an ultrasonic cell pulverizer to ultrasonically disperse or emulsify and disperse for 15 minutes to make TiO 2 The nanoparticles are evenly dispersed. After the composite emulsion is cooled to room temperature, add 3 parts by mass of toluene diisocyanate (TDI), and stir evenly at high speed. Coat the composite emulsion on release paper fixed on a horizontal plate. Remove the release paper and dry it in an oven at 110°C to form a film.

example 3

[0030] Weigh 5 parts by mass of polyethylene glycol (PEG) and 7 parts by mass of TiO 2 Add them into a three-necked flask equipped with a stirring device and a reflux condensing device, heat and stir at 55°C for 75 minutes, and use an ultrasonic cell pulverizer to ultrasonically disperse or emulsify and disperse for 15 minutes to make TiO 2 The nanoparticles are evenly dispersed. After the composite emulsion is cooled to room temperature, add 3 parts by mass of toluene diisocyanate (TDI), and stir evenly at high speed. Coat the composite emulsion on release paper fixed on a horizontal plate. Remove the release paper and dry it in an oven at 110°C to form a film.

[0031] Compared with the traditional polyurethane synthesis process, the technology involved in the present invention has significantly improved water vapor permeability and air permeability. Polyurethane / nano TiO 2 The water vapor permeability of the composite membrane is increased by 20.27%, and the air permeabi...

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PUM

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Abstract

The invention relates to a solvent-free type polyurethane nanometer TiO2 composite membrane and a preparation method thereof. Polyethyleneglycol and TiO2 nanometer particles are heated and stirred; the materials are uniformly scattered through ultrasound or emulsification; after the materials are cooled to the room temperature, toluene di-isocyanate is added; the materials are uniformly stirred at a high speed; the composite emulsion is coated onto release paper fixed on a horizontal plate; the release paper is taken down and is dried to form a membrane in a baking oven. The method provided by the invention is used for replacing a conventional organic solvent production process and an aqueous production process; the serious ecological environment pollution problem due to volatilization of a great number of organic solvents used in the production process is avoided; the nanometer TiO2 is modified, so that a hollow structure is realized; the water steam permeability and the ventilation performance are obviously improved.

Description

technical field [0001] The invention relates to a production process of a polyurethane film, in particular to a solvent-free polyurethane nano-TiO 2 Composite membrane and method for its preparation. Background technique [0002] In the traditional solvent-based polyurethane film production process, the volatilization of a large amount of organic solvents used in the production process causes serious ecological environmental pollution, and polyurethane has poor self-thickening properties, low solid content, poor high temperature resistance, poor water resistance and high cost. advanced defects. Contents of the invention [0003] The object of the invention is to provide a kind of solvent-free polyurethane nano TiO 2 The composite film and its preparation method overcome the defects of the existing polyurethane / nano composite film preparation technology, and improve the water vapor permeability and air permeability of the film to a greater extent. [0004] The technical ...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/76C08J5/18C08L75/08C08K7/24
CPCC08G18/4833C08G18/7614C08J5/18C08J2375/08C08K7/24C08K2201/011C08L75/08
Inventor 吕斌张宇聪郭旭杨娜程坤高党鸽刘欣
Owner JIAXING HEXIN CHEM IND
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