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Solvent-free polyurethane nanometer attapulgite composite membrane and preparation method thereof

A technology of nano-attapulgite and attapulgite, which is applied in the production process of polyurethane film, can solve the problems of poor self-thickening property, poor high-temperature resistance, and ecological environment pollution of polyurethane, and achieve the improvement of flame-retardant performance and self-increase The effect of poor consistency and low solid content

Inactive Publication Date: 2017-07-25
JIAXING HEXIN CHEM IND +1
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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 1

[0025] Weigh 5 parts by mass of polyethylene glycol (PEG) and 5 parts by mass of attapulgite into a three-neck flask equipped with a stirring device and a reflux condensing device, heat and stir at 45°C for 65 minutes, and ultrasonically disperse with an ultrasonic cell pulverizer Or use an emulsifier to emulsify and disperse for 10 minutes, so that the attapulgite 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 105°C to form a film.

example 2

[0027] Weigh 5 parts by mass of polyethylene glycol (PEG) and 6 parts by mass of attapulgite 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 ultrasonically disperse with an ultrasonic cell pulverizer Or use an emulsifier to emulsify and disperse for 15 minutes to evenly disperse the attapulgite nanoparticles. 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

[0029] Weigh 5 parts by mass of polyethylene glycol (PEG) and 7 parts by mass of attapulgite 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 ultrasonically Disperse or emulsify and disperse for 15 minutes to make the attapulgite nanoparticles uniformly 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.

[0030] The environmentally friendly solvent-free polyurethane / nano-attapulgite composite film prepared by the invention has significantly improved flame retardancy, vertical combustion increased by 142.04%, and limiting oxygen index increased by 44.58%.

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Abstract

The invention relates to a solvent-free polyurethane nanometer attapulgite composite membrane and a preparation method thereof. The method comprises the steps of taking polyethyleneglycol and attapulgite nanometer particles; performing heating and stirring; performing uniform scattering through ultrasound or emulsification; after the composite emulsion is cooled to the room temperature, adding toluene di-isocyanate; uniformly stirring the mixture at a high speed; coating the composite emulsion onto release paper fixed on a horizontal plate; taking out the release paper; drying the materials into a baking oven to form a membrane. The solvent-free nanometer attapulgite polyurethane prepared by the method provided by the invention has the advantages that a conventional organic solvent production process and aqueous production process are replaced; the problem of the serious ecological environment pollution caused by the volatilization of a great number of organic solvents used in the production process can be solved; the nanometer attapulgite material is introduced, so that the fire-resistance performance is 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-attapulgite composite film and a preparation method thereof. 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 purpose of the present invention is to provide a solvent-free polyurethane nano-attapulgite composite film and its preparation method, which overcomes the defects in the preparation technology of the existing polyurethane / nano-composite film and improves the flame retardancy of the film to a greater extent. [0004] The technical scheme ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/48C08K9/00C08K3/34C08J5/18C08L75/08
CPCC08G18/7614C08G18/4833C08J5/18C08J2375/08C08K3/346C08K9/00C08K2201/003C08K2201/004C08K2201/011
Inventor 吕斌徐欣欣沈连根程坤赵舜华高党鸽马建中马养民石磊刘欣
Owner JIAXING HEXIN CHEM IND
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