CN112322153A

CN112322153A - High-strength thermosetting luminescent powder coating and preparation method thereof

Info

Publication number: CN112322153A
Application number: CN202011272137.4A
Authority: CN
Inventors: 刘骏; 杨晓龙; 蔡璐; 梁成桂; 曾妮
Original assignee: Hunan Taizi Chemical Coatings Co ltd
Current assignee: Hunan Taizi Chemical Coatings Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-02-05

Abstract

The invention belongs to the technical field of powder coating preparation, and particularly relates to a high-strength thermosetting luminescent powder coating and a preparation method thereof, wherein the high-strength thermosetting luminescent powder coating comprises the following raw material components, by weight, 54-70% of solid polyester resin, 4-6% of curing agent triglycidyl isocyanurate, 5-15% of solid pigment, 2-5% of solid auxiliary agent and 8-20% of solid fluorescent powder; the preparation method of the high-strength thermosetting luminescent powder coating comprises the following steps of 1) preparing materials, mixing the materials, and stirring; 2) pouring the stirred raw materials into an extruder, controlling the temperature of the extruder at 100-120 ℃ to melt the raw materials, and then tabletting and crushing the raw materials; 3) pouring the crushed materials into a powder cutting machine, and grinding into powder of 30-45 mu m to obtain the high-strength thermosetting luminescent powder coating; it has good storage stability, impact resistance and adhesion.

Description

High-strength thermosetting luminescent powder coating and preparation method thereof

Technical Field

The invention belongs to the technical field of powder coating preparation, and particularly relates to a high-strength thermosetting luminescent powder coating and a preparation method thereof.

Background

The powder coating is a novel solid powder coating which is prepared by mixing resin, a curing agent, pigment, filler, an auxiliary agent and the like, coating the mixture on the surface of a coated object in an electrostatic spraying mode, and then baking the mixture to melt, level and solidify the mixture. The paint does not use solvent, has the characteristics of environmental protection, recoverability, energy and resource conservation, lower labor intensity, high mechanical strength of film coating, strong corrosion resistance and the like, and becomes well-known 4E type (high production efficiency, excellent film coating performance, ecological environmental protection and economy) paint.

However, the conventional powder coating can only adopt electrostatic coating, the coating color is single, a required pattern cannot be formed, continuous luminescence cannot be realized at night, the weather resistance is poor, and long-term outdoor use cannot be guaranteed. Accordingly, the prior art is yet to be improved and developed.

Disclosure of Invention

The invention aims to provide a high-strength thermosetting luminescent powder coating and a preparation method thereof, and the high-strength thermosetting luminescent powder coating has the advantages of good storage stability, strong impact resistance and good adhesive force.

The invention relates to a high-strength thermosetting luminescent powder coating, which comprises the following raw materials, by weight, 54-70% of solid polyester resin, 4-6% of curing agent triglycidyl isocyanurate, 5-15% of solid pigment, 2-5% of solid auxiliary agent and 8-20% of solid fluorescent powder.

The solid polyester resin comprises, by weight, 70% of solid polyester resin, 5% of curing agent triglycidyl isocyanurate, 8% of solid pigment, 3% of solid auxiliary agent and 14% of solid fluorescent powder.

The solid fluorescent powder is calcium halophosphate fluorescent powder.

The solid auxiliary agent comprises a leveling agent, a brightening agent, a defoaming agent, an anti-wear agent, a dispersing agent and a delustering agent.

The invention provides a preparation method of high-strength thermosetting luminescent powder coating, which comprises the following steps,

1) after the materials are prepared, mixing and stirring the raw materials;

2) pouring the stirred raw materials into an extruder, controlling the temperature of the extruder at 100-120 ℃ to melt the raw materials, and then tabletting and crushing the raw materials;

3) and pouring the crushed materials into a powder cutting machine, and grinding into powder of 30-45 mu m to obtain the high-strength thermosetting luminescent powder coating.

The stirring time was 5 min.

The temperature of the extruder was controlled at 115 ℃.

The particle size of the material crushed in the step 2) is 150-300 mu m.

The invention has the beneficial effects that the luminescent powder coating is added with luminescent agents, such as fluorescent powder and other substances, so that the luminescent powder coating has certain problems in the aspects of storage stability and the like, is easy to agglomerate and has insufficient adhesive force.

Detailed Description

The various chemicals and reagents used in the examples of the present invention were all commercially available.

Example 1

The high-strength thermosetting luminescent powder coating comprises the following raw material components, by weight, 70% of solid polyester resin, 5% of curing agent triglycidyl isocyanurate, 8% of solid pigment, 3% of solid auxiliary agent and 14% of calcium halophosphate fluorescent powder; the solid auxiliary agent comprises a flatting agent, a brightening agent, a defoaming agent, an anti-wear agent, a dispersing agent and a delustering agent, and the weight ratio of the flatting agent, the brightening agent, the defoaming agent, the anti-wear agent, the dispersing agent and the delustering agent is 1:1:1:1: 1.

A preparation method of high-strength thermosetting luminescent powder coating comprises the following steps,

1) after the materials are prepared, pouring the raw materials into a mixing tank, mixing, stirring for 5min, fully mixing, uniformly stirring, and discharging for later use;

2) pouring the mixed raw materials into an extruder, controlling the temperature of the extruder at 115 ℃, ensuring that the powder is not solidified but can be molten, extruding the materials to fully melt and mix the materials, tabletting the materials by a tabletting machine, and then crushing the materials to obtain coarse crushed materials;

Comparative example 1

The difference between the comparative example 1 and the example 1 is that the fluorescent powder comprises the following raw material components, by weight, 70% of solid polyester resin, 10% of blocked isocyanate, 8% of solid pigment, 3% of solid auxiliary agent and 9% of calcium halophosphate fluorescent powder. The rest is the same as in example 1.

Comparative example 2

Comparative example 2 differs from example 1 in that the temperature of the extruder in step 2) was 100 ℃ in the preparation of the powder coating, and the material was not tabletted but directly pulverized after extrusion. The rest is the same as in example 1.

The powder coatings obtained in example 1 and comparative examples 1-2 were compared to obtain a table of results of performance tests as shown in Table 1.

Table 1 table of performance test results

From the analysis of table 1 above, it can be seen that the product of example 1 is significantly superior to the comparative example in storage stability and has better adhesion.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The high-strength thermosetting luminescent powder coating is characterized by comprising, by weight, 54-70% of solid polyester resin, 4-6% of curing agent triglycidyl isocyanurate, 5-15% of solid pigment, 2-5% of solid auxiliary agent and 8-20% of solid fluorescent powder.

2. The high-strength thermosetting powder coating material as claimed in claim 1, which comprises, in weight percent, 70% of solid polyester resin, 5% of curing agent triglycidyl isocyanurate, 8% of solid pigment, 3% of solid auxiliary agent and 14% of solid fluorescent powder.

3. The high intensity thermosetting luminescent powder coating of claim 1, wherein the solid phosphor is a calcium halophosphate phosphor.

4. The high strength thermosetting luminescent powder coating according to any one of claims 1 to 3, wherein the solid auxiliary agent comprises leveling agents, brighteners, defoamers, anti-wear agents, dispersants and matting agents.

5. A process for preparing a high-strength thermosetting luminescent powder coating material according to any one of claims 1 to 4, characterized by comprising the steps of,

1) after the materials are prepared, mixing and stirring the raw materials;

6. The process according to claim 5, wherein the stirring is carried out for 5 min.

7. The process according to claim 5 or 6, wherein the temperature of the extruder is controlled to 115 ℃.

8. The process according to claim 5 or 6, wherein the particle size of the pulverized material obtained in step 2) is 150-300 μm.