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A kind of preparation method and application of environment-friendly protective coating

A protective coating, an environmentally friendly technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., to achieve excellent heat resistance and fast drying at room temperature.

Active Publication Date: 2017-08-15
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, foreign countries have used peelable coatings for the surface protection of aircraft transparent parts, but there are no relevant reports on the use of peelable protective coatings on aircraft transparent parts in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The steps of the method for preparing this kind of environment-friendly protective coating are as follows:

[0024] (1) Add 100 g of ionic aliphatic polyurethane dispersion and 10 g of wetting and dispersing agent into a beaker, and use a high-speed shear dispersing emulsifier to shear and disperse for 3 hours at 2000 rpm;

[0025] (2) Add 2 g of nano-scale silicon dioxide treated with a silane coupling agent to the mixture obtained in step (1), mix and stir evenly, and ultrasonically disperse for 1 h;

[0026] (3) Add 0.6 g of defoamer and 0.8 g of leveling agent to the mixture obtained in step (2), mix and stir for 15 min and let stand for 2 h;

[0027] (4) The mixture obtained in step (3) is dehydrated in a vacuum drying oven, and the temperature of the vacuum drying oven is 40° C. to obtain this kind of environment-friendly protective coating for viscosity and stand-by;

[0028] The wetting and dispersing agent is one or a mixture of polyacrylic acid sodium salt an...

Embodiment 2

[0033] The steps of the method for preparing this kind of environment-friendly protective coating are as follows:

[0034] (1) Add 120 g of ionic aliphatic polyurethane dispersion and 15 g of wetting and dispersing agent into a beaker, and use a high-speed shear dispersing emulsifier to shear and disperse for 2 hours at 2500 rpm;

[0035] (2) Add 3 g of nano-scale silicon dioxide treated with a silane coupling agent to the mixture obtained in step (1), mix and stir evenly, and ultrasonically disperse for 1.5 h;

[0036] (3) Add 0.85 g of defoamer and 0.9 g of leveling agent to the mixture obtained in step (2), mix and stir for 15 min and then let stand for 3 h;

[0037] (4) The mixture obtained in step (3) is dehydrated in a vacuum drying oven, and the temperature of the vacuum drying oven is 40° C. to obtain this kind of environment-friendly protective coating for viscosity and stand-by;

[0038] The wetting and dispersing agent is one or a mixture of polyacrylic acid sodium...

Embodiment 3

[0043] The steps of the method for preparing this kind of environment-friendly protective coating are as follows:

[0044] (1) Add 150 g of ionic aliphatic polyurethane dispersion and 18 g of wetting and dispersing agent into a beaker, and use a high-speed shear dispersing emulsifier to shear and disperse for 1.5 h at 3000 rpm;

[0045] (2) Add 4 g of nano-scale silicon dioxide treated with a silane coupling agent to the mixture obtained in step (1), mix and stir evenly, and ultrasonically disperse for 2 hours;

[0046] (3) Add 1.0 g of defoamer and 1.2 g of leveling agent to the mixture obtained in step (2), mix and stir for 20 min and let stand for 4 h;

[0047] (4) The mixture obtained in step (3) is dehydrated in a vacuum drying oven, and the temperature of the vacuum drying oven is 40° C. to obtain this kind of environment-friendly protective coating for viscosity and stand-by;

[0048] The wetting and dispersing agent is one or a mixture of polyacrylic acid sodium salt ...

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PUM

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Abstract

The invention relates to a preparation method and application of environment-friendly type protective coating. The preparation method comprises the preparation steps of adding water-borne polyurethane dispersoid and a wetting dispersant into a beaker, and adopting a high-speed shearing, dispersion and emulsion machine to shear and disperse the water-borne polyurethane dispersoid and the wetting dispersant; then adding a silicon dioxide product, and carrying out ultrasonic dispersion for 1 to 3 hours after uniform mixing and stirring; adding a defoaming agent and a flatting agent into the beaker after reaction for being mixed and stirred, and standing for 1 to 5 hours; removing partial water in a vacuum drying tank. The application is characterized in that the environment-friendly type protective coating is sprayed on the surface of a transparent part to obtain a strippable protective coating layer, the environment-friendly type protective coating is sprayed for 2 to 3 times during spraying, the interval time for spraying the environment-friendly type protective coating is 20 to 30 minutes, the transparent part can be put into a baking oven for being heated for 3 to 5 hours or put under room temperature for 48 to 72 hours after spraying is completed and a uniform and smooth film layer is formed on the surface of the transparent part.

Description

technical field [0001] The invention relates to a preparation method and application of an environment-friendly protective coating, which belongs to the technical field of preparation of chemical coatings. Background technique [0002] Transparent parts (including airplanes, automobiles and motor vehicle transparent parts) usually need to take protective measures to prevent the surface from being damaged in the process of manufacturing, processing, transportation and assembly. The protective material on the surface of the transparent part is generally made of kraft paper, PE film, electrostatic adsorption film or dust-free cloth. The surface of the protective paper needs to be brushed with starch glue, and then pasted on the surface of the plexiglass for protection. The advantage is that the operation will not damage the transparent part. The disadvantage is that the residual starch glue on the surface of the transparent part is not easy to clean after peeling off; PE film i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/12
Inventor 哈恩华赵修文刘其广付立成纪建超
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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