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Coating liquid for preventing defects on paint surface after paint spraying

A coating liquid and paint surface technology, which is applied in the field of paint spraying, can solve the problems of the discount of the service life of the paint surface, the chromatic aberration of the paint surface, and the impact on the appearance, and achieve the effects of improving quality, wide application prospects, and high curing temperature.

Inactive Publication Date: 2020-01-21
界首市金龙机械设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the high-temperature curing process of the paint sprayed on the metal surface, the paint film is prone to small cracks due to various reasons, which does not affect the appearance and is not conducive to the protection of the metal.
Therefore, after the paint surface is cured, it is often necessary to manually inspect the paint surface carefully and repair the defects such as small cracks. The service life of the repaired paint surface is not only greatly reduced, but also the paint surface is prone to color difference, which affects the appearance.

Method used

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  • Coating liquid for preventing defects on paint surface after paint spraying

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A coating solution for preventing defects on the paint surface after paint spraying, the preparation method is as follows:

[0023] 1) Add graphene oxide into deionized water, oscillate and disperse under 200W ultrasonic wave for 25 minutes to prepare graphene oxide dispersion liquid, then add sodium borohydride and sodium bisulfite, continue ultrasonic dispersion for 15 minutes, and then put it in a constant temperature water bath Heating to 90°C, constant temperature reaction for 6h, then washing with deionized water until neutral, and freeze-drying at -55°C for 48h to prepare graphene airgel;

[0024] 2) Add the graphene airgel into the tetrahydrofuran solution, pass through nitrogen to remove the air in the reaction system, then add triethylamine, stir at a speed of 100r / min for 30min, then move to an ice-water bath, slowly add the A mixed solution composed of 2-bromoisobutyryl bromide and tetrahydrofuran, the mixed solution is added within 2 hours, and then reacted...

Embodiment 2

[0034] A coating solution for preventing defects on the paint surface after paint spraying, the preparation method is as follows:

[0035] 1) Add graphene oxide to deionized water, oscillate and disperse under 250W ultrasonic wave for 20 minutes to prepare graphene oxide dispersion liquid, then add sodium borohydride and sodium bisulfite, continue ultrasonic dispersion for 13 minutes, and then put it in a constant temperature water bath Heating to 100°C, constant temperature reaction for 5h, then washing with deionized water until neutral, and freeze-drying at -60°C for 40h to prepare graphene airgel;

[0036] 2) Add the graphene airgel into the tetrahydrofuran solution, pass nitrogen to remove the air in the reaction system, then add triethylamine, stir at a speed of 130r / min for 25min, then move to an ice-water bath, slowly add the A mixed solution composed of 2-bromoisobutyryl bromide and tetrahydrofuran, the mixed solution was added within 2.5 hours, and then reacted at ro...

Embodiment 3

[0046] A coating solution for preventing defects on the paint surface after paint spraying, the preparation method is as follows:

[0047] 1) Add graphene oxide into deionized water, oscillate and disperse under 300W ultrasonic waves for 15 minutes to obtain a graphene oxide dispersion, then add sodium borohydride and sodium bisulfite, continue ultrasonic dispersion for 10 minutes, and then put it in a constant temperature water bath Heating to 110°C, constant temperature reaction for 6h, then washing with deionized water until neutral, and freeze-drying at -70°C for 36h to prepare graphene airgel;

[0048] 2) Add the graphene airgel into the tetrahydrofuran solution, pass through nitrogen to remove the air in the reaction system, then add triethylamine, stir at a speed of 150r / min for 20min, then move to an ice-water bath, slowly add the A mixed solution composed of 2-bromoisobutyryl bromide and tetrahydrofuran, the mixed solution is added within 3 hours, and then reacted at ...

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Abstract

The invention discloses a coating liquid for preventing paint surface defects after paint spraying, which is prepared by the following steps: adding sodium borohydride and sodium hydrogen sulfite intoa graphene oxide dispersion liquid, and carrying out a reaction to obtain graphene aerogel; 2) adding the graphene aerogel into a tetrahydrofuran solution, adding triethylamine, transferring the mixture into an ice-water bath, and adding the mixed solution for reaction to obtain brominated graphene aerogel; 3) adding anhydrous citric acid and tetramethyl propane diamine into methanol, stirring the mixture for carrying out a reaction, and adding the graphene aerogel methanol dispersion liquid to obtain modified graphene oxide; and 4) emulsifying epoxy resin, propylene glycol monomethyl ether and an emulsifier, and adding the remaining raw materials to obtain the coating liquid. The coating liquid has certain self-repairing performance and high curing temperature, cracks of the finish paintcan be reduced in the curing process, and the cracks can be filled and repaired, so that the quality of the finish paint can be improved, and the coating liquid has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of paint spraying, in particular to a coating solution for preventing defects on the paint surface after paint spraying. Background technique [0002] Paint is coated on the surface of the object to be protected or decorated, and can form a continuous film firmly attached to the object to be coated. It is usually based on resin, oil, or emulsion, with the addition of corresponding additives, and is formulated with organic solvents or water. formed viscous liquid. Most of the early paints used vegetable oil as the main raw material. Now, synthetic resins have replaced most or all of the vegetable oil. Paints belong to organic chemical polymer materials, and the formed paint film belongs to the polymer compound type. According to the classification of modern homogeneous chemical products, paints belong to fine chemical products. Modern paints are gradually becoming a class of multifunctional engineering mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/62
CPCC09D163/00C09D7/62C09D7/70C08K2201/011C08K2003/222C08K13/06C08K9/04C08K7/24C08K9/06C08K3/22
Inventor 申慧君
Owner 界首市金龙机械设备有限公司
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