Polyurethane waterproof moisture-permeable film and preparation method thereof

A polyurethane waterproof, waterproof and moisture-permeable membrane technology, which is applied in the field of waterproof and moisture-permeable membrane materials, can solve the problems of small pore size of waterproof and moisture-permeable membranes, and achieve the effects of improving mechanical strength, good compatibility, and enhancing moisture absorption performance

Active Publication Date: 2020-04-17
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has a certain degree of innovation in terms of environmental protection, but the waterproof and moisture-permeable membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] The preparation method of the titanium dioxide porous microspheres is as follows:

[0033] A certain amount of cellulose triacetate was dissolved in dimethylacetamide, and magnetically stirred at 60°C for 1 hour until uniform. A certain amount of tetrabutyl titanate is dissolved in a mixed solution of dimethylacetamide and glacial acetic acid, and magnetically stirred at 25°C for 1 hour until uniform. The above solutions were mixed, stirred at room temperature for 3 hours, and then placed in an oven at -10°C for 30 minutes. A large amount of ethanol was added to the solution to extract dimethylacetamide and glacial acetic acid, and the extraction was continued for 5 times. The remaining samples were freeze-dried for 48 hours to obtain cellulose triacetate / titanium dioxide composite porous microspheres. The composite porous microspheres were put into a certain amount of 0.5% NaOH ethanol solution to hydrolyze for 24 hours, then washed with distilled water to neutrality, a...

Example Embodiment

[0041] Example 1

[0042] The polyurethane waterproof and moisture-permeable membrane is mainly made of the following components: 25 parts of polyurethane resin, 72 parts of organic solvent, 2 parts of pore former, 1 part of inorganic filler.

[0043] The polyurethane resin adopts the JF-S-WV7025 model product of Zhejiang Huafeng Synthetic Resin Co., Ltd.;

[0044] The raw materials of the polyurethane resin include polypolyol, and polyethylene glycol accounts for 20% of the mass of the polypolyol;

[0045] The organic solvent is a mixed solution of N,N-dimethylformamide, ethyl acetate and dimethyl carbonate, and the mass ratio is 6:3:1;

[0046] The pore-forming agent is titanium dioxide, aluminum oxide, and zirconium oxide porous microspheres, the material ratio is 5:3:2, and the average pore diameter is 15 μm;

[0047] The inorganic filler is modified by a silane coupling agent, the inorganic filler is organic montmorillonite, kaolin, carbon nanotubes, and the mass ratio is 3:5:2, and...

Example Embodiment

[0052] Example 2

[0053] The polyurethane waterproof and moisture-permeable membrane is mainly made of the following components: 25 parts of polyurethane resin, 74 parts of organic solvent, 0.5 part of pore former, 0.5 part of inorganic filler.

[0054] The polyurethane resin adopts the JF-S-WV7025 model product of Zhejiang Huafeng Synthetic Resin Co., Ltd.;

[0055] The raw material of the polyurethane resin includes polypolyol, and polyethylene glycol accounts for 20% of the mass of the polypolyol;

[0056] The organic solvent is a mixed solution of N,N-dimethylformamide, ethyl acetate and dimethyl carbonate, and the mass ratio is 6:3:1;

[0057] The pore-forming agent is titanium dioxide, aluminum oxide, and zirconium oxide porous microspheres, the material ratio is 5:3:2, and the average pore diameter is 1 μm;

[0058] The inorganic filler is modified by a silane coupling agent, the inorganic filler is organic montmorillonite, kaolin, carbon nanotubes, and the mass ratio is 3:5:2, a...

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Abstract

The invention discloses a polyurethane waterproof moisture-permeable film and a preparation method thereof. The polyurethane waterproof moisture-permeable film is prepared from the following raw materials in parts by weight: 25-45 parts of polyurethane resin, 52-75 parts of an organic solvent, 0.5-2 parts of a pore-forming agent and 0.1-1 part of an inorganic filler. The method comprises the following steps: step 1, physical blending: adding a pore-forming agent into a polyurethane resin solution, stirring, adding the inorganic filler, continuously stirring, adding the organic solvent, uniformly stirring, and cooling to obtain a mixed solution; and 2, preparing a film, namely pouring the mixed solution obtained in the step 1 onto a planar medium, scraping a film on the planar medium by using a scraping tool, and drying to form a film, thereby obtaining the polyurethane waterproof moisture-permeable film. According to the invention, the problem of poor performance of a commercially aviable waterproof and moisture permeable film can be solved, the moisture permeability and the water pressure resistance of the polyurethane waterproof moisture-permeable film are effectively improved, the waterproof and moisture permeable performance of the polyurethane waterproof moisture-permeable film can be regulated and controlled, and the breaking strength, the elongation at break and other mechanical strength are excellent.

Description

technical field [0001] The invention relates to a polyurethane waterproof and moisture-permeable membrane and a preparation method thereof, belonging to the technical field of waterproof and moisture-permeable membrane materials. Background technique [0002] In order to meet people's consumption needs, there are more and more types of functional clothing on the market, and waterproof and moisture permeability is one of the important functions. In order to realize the waterproof and moisture-permeable properties of clothing, the current market generally adopts laminating fabrics with waterproof and moisture-permeable polyurethane films. [0003] There are two main types of polyurethane waterproof and moisture-permeable membranes: microporous waterproof and moisture-permeable membranes and dense waterproof and moisture-permeable membranes. A large number of micropores with a diameter of 2-20 μm are distributed on the surface of the microporous waterproof and moisture-permeab...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L75/06C08K13/06C08K9/06C08K3/34C08K3/04C08K7/24C08J5/18
CPCC08J5/18C08J2375/06C08J2375/08C08K3/04C08K3/346C08K7/24C08K9/06C08K13/06C08K3/041
Inventor 方飞张初银韩飞龙孙凡杜飘扬岑小春
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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