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Low-VOC organic-solvent-free heat-resistant water-based coating and high-temperature-resistant and corrosion-resistant coating prepared from coating

An organic solvent and hot water resistance technology, applied in the field of high temperature and corrosion resistant coatings and heat resistant coatings, can solve the problems of large pollution, residual surfactant cracking products, large particle size, etc., and reach the film-forming baking temperature Low, reduced development workload, excellent paint film performance effect

Active Publication Date: 2021-10-22
ZHEJIANG PFLUON CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patents CN1302047 and CN1305936 disclose a water-based polyethersulfone dispersion and a method for manufacturing redispersible polyarylethersulfone micropowders. The above-mentioned surfactants decompose and volatilize at a high temperature, resulting in a large amount of surfactant cracking products remaining during the baking and film-forming process of polyethersulfone, which seriously affects the compactness and adhesion of the material coating film, and the degradation products of the surfactant are biological Hormonal compounds, there are health risks
[0005] patent C08J 3 / 12 discloses a preparation method of spherical polyarylene ether sulfone or polyarylene ether ketone fine powder, which discloses a high The method of making microspheres by molecular solution spraying method requires a large amount of solvent, high energy consumption, large particle size and wide distribution, and limited product application
[0006] The coating application of engineering plastics is mainly divided into oil-based coatings, water-based coatings, and powder coatings. Oil-based coatings have been phased out by the state due to high VOC emissions; currently water-based The paint mainly adopts the addition of water-soluble engineering plastic high-temperature solvents to promote the adhesion of the coating film. Although it is still inevitable to add a certain proportion of solvents, compared with oil-based paints, water-based paints greatly reduce VOC emissions; powder coatings have Completely solvent-free, the current mainstream resin powder manufacturing process has high pollution, high energy consumption, and more restrictions on coating construction

Method used

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  • Low-VOC organic-solvent-free heat-resistant water-based coating and high-temperature-resistant and corrosion-resistant coating prepared from coating
  • Low-VOC organic-solvent-free heat-resistant water-based coating and high-temperature-resistant and corrosion-resistant coating prepared from coating
  • Low-VOC organic-solvent-free heat-resistant water-based coating and high-temperature-resistant and corrosion-resistant coating prepared from coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] A kind of preparation method of engineering plastic dispersion liquid, concrete steps are as follows:

[0089] Step 1. Take 200 parts of chloroform, add 4 parts of sodium dodecanoate, 4 parts of sodium myristate, and 60 parts of PES coarse powder, and stir for 30 minutes until PES is fully dissolved. Add chloroform to the obtained solution to adjust the solution viscosity to 200±10Pa.s.

[0090] Step 2. Stir at a rotational speed of 500 rpm, and at the same time slowly add 300 parts of water, control the addition of water to complete within 5-10 minutes, and obtain an emulsified dispersion of the PES solution.

[0091] Step 3. Set the spray steam temperature to 120°C, the steam flow rate to 100L / min, and the emulsified dispersion liquid flow rate of the PES solution to 100g / min, and quickly remove the chloroform in the dispersion liquid by spray evaporation to obtain a heat-resistant and hydrolysis-resistant PES dispersion liquid .

[0092] The resulting PES dispersio...

Embodiment 2

[0097] Step 1. Take 150 parts of chloroform, add 4 parts of sodium dodecanoate, 4 parts of sodium myristate, and 60 parts of PPSU coarse powder, and stir for 30 minutes until PPSU is fully dissolved. Add chloroform to the obtained solution to adjust the solution viscosity to 500±10Pa.s.

[0098] Steps 2 and 3 refer to Example 1.

[0099] The obtained PPSU dispersion liquid is taken and detected by a laser particle size analyzer, and the particle size distribution of the obtained material is 0.7-10 μm.

Embodiment 3

[0101] Step 1. Take 200 parts of chloroform, add 4 parts of sodium octadecanoate, 4 parts of sodium hexadecanoate, and 60 parts of PES coarse powder, and stir for 30 minutes until the PES is fully dissolved. Add chloroform to the obtained solution to adjust the solution viscosity to 200±10Pa.s.

[0102] Steps 2 and 3 refer to Example 1.

[0103] The obtained PES dispersion liquid is taken and detected by a laser particle size analyzer, and the particle size distribution of the obtained material is 0.5-5 μm.

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Abstract

The invention relates to a heat-resistant coating, in particular to a low-VOC organic-solvent-free heat-resistant water-based coating and a high-temperature-resistant and corrosion-resistant coating prepared from the coating, and belongs to the technical field of coatings. According to the low-VOC organic-solvent-free heat-resistant water-based coating, the coating is mainly prepared from the following raw materials in percentage by weight: 5-30% of engineering plastic particles, 0-15% of PTFE, 0.1-2% of pigment, 0.5-5% of functional filler, 0.1-5% of functional aid and the balance of water, and the total weight of the raw materials is 100%. The engineering plastic particles are added in the form of engineering plastic dispersion liquid. The low-VOC organic-solvent-free heat-resistant water-based coating does not contain an organic solvent, the film-forming baking temperature is relatively low, and the matrix resin of the coating is an engineering plastic dispersion liquid. The organic solvent refers to organic solvents such as N-methyl pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, benzene and the like.

Description

technical field [0001] The invention relates to a heat-resistant coating, in particular to a low-VOC organic-solvent-free hot water-resistant coating and a high-temperature-resistant and corrosion-resistant coating prepared therefrom, belonging to the technical field of coatings. Background technique [0002] Heat-resistant coatings have been widely used in industrial protection, cooking utensils, and household appliances. Solvate. [0003] Patent CN104974661 discloses a technical scheme of polyethersulfone ultrafine powder and its material application. The polyethersulfone ultrafine powder described in this patent is obtained by grinding, has an irregular structure, and is a solid particle. During the film formation process, It must be supplemented with solvents (see its examples), failing to achieve environmental improvement. [0004] Patents CN1302047 and CN1305936 disclose a method for manufacturing water-based polyethersulfone dispersion liquid and redispersible polya...

Claims

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Application Information

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IPC IPC(8): C09D181/06C09D127/18C09D7/20C09D5/08C09D7/61
CPCC09D181/06C09D7/20C09D5/08C09D5/18C09D7/61C08K2201/011C08K2003/385C08L2201/08C08L27/18C08K3/38C08K3/04C08K3/042
Inventor 王锡铭史海兵
Owner ZHEJIANG PFLUON CHEM
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