A method for preparing sheet-like titanium powder

Abstract

This invention relates to the field of titanium powder processing technology, specifically a method for preparing flake titanium powder, comprising the following steps: S1, selecting a base resin; S2, mixing the selected base resin with titanium powder to ensure the titanium powder is fully impregnated by the resin; S3, adding a solvent to the mixture of resin and titanium powder; S4, subjecting the prepared slurry to vacuum degassing; S5, uniformly feeding the vacuum-degassed slurry into a roller press; S6, using the slurry containing flake titanium powder, preparing a metallic automotive paint according to a metallic paint formula. In this method for preparing flake titanium powder, the titanium powder is impregnated by the automotive paint base resin, causing a layer of resin to coat the surface of the titanium powder, replacing the surface air. Compared with the traditional ball milling method, the roller pressing method for preparing flake titanium powder is more powerful and direct, resulting in larger flake diameters and thinner flakes. Furthermore, the heat generated during the preparation process can be carried away by cooling water inside the rollers, avoiding the risk of heat concentration.

Description

Technical Field

[0001] This invention relates to the field of titanium powder processing technology, and more specifically, to a method for preparing sheet-like titanium powder. Background Technology

[0002] Currently used metallic automotive paints primarily involve adding glitter powder (i.e., aluminum powder) to the original paint composition. This increases the paint's hardness and improves its abrasion resistance. Simultaneously, the aluminum powder causes the car's surface to refract light differently, resulting in excellent reflectivity, especially beneficial for nighttime driving and reducing the risk of accidents. However, aluminum powder is chemically reactive and easily oxidizes in air. When used as a pigment, the flaky aluminum powder loses its luster upon oxidation, causing the paint to appear dull or even black, severely impacting the product's performance. Titanium and titanium alloys, on the other hand, possess strong oxidation resistance, high specific strength, and excellent corrosion resistance, making them widely applicable in aerospace, marine engineering, petrochemicals, and biomedicine.

[0003] However, common titanium powder preparation processes on the market mostly produce spherical titanium powder with relatively large dimensions, making them unsuitable as pigments for metallic paints. Currently, some methods use hydrogenated and dehydrogenated titanium powder to produce flake-shaped titanium powder via ball milling, but this requires inert gas protection, grinding for 10-25 hours, resulting in long production times, demanding equipment, and the ability to only produce near-flake-shaped titanium powder, leading to lower refractive properties compared to aluminum powder. Therefore, to meet the needs of automotive metallic paints, a new method for preparing flake-shaped titanium powder needs to be developed. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing flake titanium powder, in order to solve the problem mentioned in the background art but common titanium powder preparation processes on the market, which produce titanium powder that is mostly spherical and large in size, making it unsuitable as a pigment for metallic paint.

[0005] To achieve the above objectives, the present invention provides a method for preparing flake-shaped titanium powder, comprising the following steps:

[0006] S1. Select the base resin. Choose water-based or oil-based automotive paint resin and prepare the titanium powder that needs to be pressed into flakes.

[0007] S2. Mix the selected base resin with titanium powder to ensure that the titanium powder is fully impregnated with the resin. The purpose of this step is to coat the titanium powder with resin to prevent it from oxidizing due to contact with air during subsequent processing.

[0008] S3. Add solvent to the mixture of resin and titanium powder to adjust the viscosity of the mixture and form a slurry suitable for rolling.

[0009] S4. The prepared slurry is subjected to vacuum degassing to remove air bubbles and volatile components, ensuring the uniformity and stability of the slurry.

[0010] S5. The slurry that has undergone vacuum degassing is evenly fed into the roller press to ensure that the titanium powder is effectively pressed into flakes. The roller pressing process is carried out through multi-stage roller pressing to improve the forming effect of the flake titanium powder.

[0011] S6. Metallic automotive paint is prepared by using a slurry containing flake titanium powder and mixing it according to a metallic paint formula.

[0012] As a preferred embodiment of the present invention, in step S1, the automotive paint coating resin includes amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane.

[0013] As a preferred embodiment of the present invention, the solvent used in step S3 is water, alcohol or ester.

[0014] As a preferred embodiment of the present invention, in step S3, the content of titanium powder in the slurry is controlled within the range of 5-50%.

[0015] As a preferred embodiment of the present invention, in step S6, the inter-roller pressure of the roller press is controlled within the range of 50-350 MPa.

[0016] As a preferred embodiment of the present invention, in step S3, a mixer is used to uniformly stir the mixture when adjusting its viscosity.

[0017] As a preferred embodiment of the present invention, in step S5, the pressure rollers in the roller press are adjusted horizontally by being driven by an external cylinder, thereby realizing the adjustment of the roller spacing.

[0018] As a preferred embodiment of the present invention, in step S5, the roller press includes a plurality of pressure rollers symmetrically arranged, the pressure rollers are divided into upper and lower groups, the pressure rollers are fixed by a mounting frame, a top plate is installed on the top of the mounting frame, a mixer is installed in the middle of the top plate, and an upper baffle assembly and a lower baffle assembly are installed in the middle of the mounting frame near the pressure rollers.

[0019] As a preferred embodiment of the present invention, the top of the mixer is provided with a feeding port, and the bottom of the pressure roller is provided with a receiving groove.

[0020] As a preferred embodiment of the present invention, the upper and lower baffle components have the same structure, each consisting of two parallel plates located in front of and behind the pressure roller. The upper end of the parallel plate is provided with an upper opening, and the lower end of the parallel plate is provided with a lower opening. The upper pressure roller is located inside the upper opening, and the lower pressure roller is located inside the lower opening. A baffle is installed on the side of the parallel plate between the upper and lower pressure rollers.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In the preparation method of this flake titanium powder, the titanium powder is impregnated with automotive paint base resin, so that the surface of the titanium powder is coated with a layer of resin to replace the surface air. During the pressing process, the resin blocks the titanium powder from contacting the air, replacing the traditional inert gas protection.

[0023] 2. In the preparation method of this flake titanium powder, the flake titanium powder is prepared by roller pressing. Compared with the traditional ball milling method, the pressing force is greater and more direct, and the flake titanium powder obtained has a larger flake diameter and a smaller flake thickness. Moreover, the heat generated in the preparation process can be carried away by the cooling water inside the pressing roller, avoiding the risk of heat concentration.

[0024] 3. In the preparation method of this flake titanium powder, the rolling process is also the dispersion process of titanium powder in the base resin. At the same time, the base resin can prevent the dispersed titanium powder from agglomerating again, thus improving the dispersibility of titanium powder in automotive paint.

[0025] 4. In the preparation method of this flake titanium powder, the use of a roller press instead of a ball mill can achieve continuous production with good quality stability and high production efficiency. At the same time, the aspect ratio of the titanium powder can be adjusted by the roller spacing, roller pressure, and different numbers of rollers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the roller press in this invention;

[0027] Figure 2 This is a schematic diagram of the lower baffle assembly in this invention.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Pressure roller; 2. Mounting frame; 3. Top plate; 4. Mixer; 5. Upper baffle assembly; 6. Lower baffle assembly; 61. Upper opening; 62. Lower opening; 63. Baffle; 7. Receiving trough. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] This invention provides a method for preparing flake-shaped titanium powder, such as... Figures 1-2 As shown, it includes the following steps:

[0033] S1. Select the base resin. Choose a water-based or oil-based automotive paint resin and prepare the titanium powder to be pressed into flakes. The main task in this step is to select a suitable base resin. The automotive paint resin mentioned here can be various types, such as amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane. Simultaneously, prepare the titanium powder to be pressed into flakes.

[0034] S2. Mix the selected base resin with the titanium powder, ensuring that the titanium powder is fully impregnated with the resin. The purpose of this step is to coat the titanium powder with resin to prevent it from oxidizing due to contact with air during subsequent processing. This step ensures that the titanium powder is fully impregnated with resin, that is, completely coated with resin. This prevents the titanium powder from oxidizing due to contact with air during subsequent processing, thereby ensuring product quality.

[0035] S3. Add a solvent to the mixture of resin and titanium powder to adjust the viscosity of the mixture and form a slurry suitable for roller pressing. To form a slurry suitable for roller pressing, a solvent needs to be added to the mixture of resin and titanium powder. The solvent mentioned here can be water, alcohol, or ester, etc. The specific solvent chosen depends on the type of base resin and the desired slurry properties. By adding a solvent, the viscosity of the mixture can be effectively adjusted, making it easier to process.

[0036] S4. The prepared slurry undergoes vacuum degassing to remove air bubbles and volatile components, ensuring the slurry's uniformity and stability. In this step, the prepared slurry is degassed under vacuum. This process removes air bubbles and volatile components, ensuring the slurry's uniformity and stability. This is crucial for the subsequent rolling process and the final quality of the metallic paint.

[0037] S5. The vacuum-degassed slurry is evenly fed into the roller press to ensure that the titanium powder is effectively pressed into flakes. The roller pressing process is carried out through multiple stages to improve the forming effect of the flake titanium powder. The vacuum-degassed slurry is evenly fed into the roller press. Through the multi-stage roller pressing process, the titanium powder is effectively pressed into flakes. This step is crucial for improving the forming effect of the flake titanium powder and directly affects the quality and appearance of the final metallic automotive paint.

[0038] S6. Using a slurry containing flake titanium powder, metallic automotive paint is prepared by mixing according to the metallic paint formula. In this step, a slurry containing flake titanium powder is mixed according to the metallic paint formula to finally produce metallic automotive paint. This step is the final stage of the entire process and a key link in product quality control.

[0039] In this embodiment, in step S1, the automotive paint coating resin includes amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane.

[0040] Specifically, in step S3, the solvent used is water, alcohol, or ester.

[0041] Furthermore, in step S3, the content of titanium powder in the slurry is controlled within the range of 5-50%.

[0042] Furthermore, in step S6, the inter-roller pressure of the roller press is controlled within the range of 50-350 MPa.

[0043] Furthermore, in step S3, a mixer is used to uniformly stir the mixture when adjusting its viscosity.

[0044] Furthermore, in step S5, the pressure rollers in the roller press are horizontally adjusted by an external cylinder, thereby achieving roller spacing adjustment.

[0045] Example 2

[0046] This invention provides a method for preparing flake-shaped titanium powder, such as... Figures 1-2 As shown, it includes the following steps:

[0047] S1. Select the base resin. Choose a water-based or oil-based automotive paint resin and prepare the titanium powder to be pressed into flakes. The main task in this step is to select a suitable base resin. The automotive paint resin mentioned here can be various types, such as amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane. Simultaneously, prepare the titanium powder to be pressed into flakes.

[0048] S2. Mix the selected base resin with the titanium powder, ensuring that the titanium powder is fully impregnated with the resin. The purpose of this step is to coat the titanium powder with resin to prevent it from oxidizing due to contact with air during subsequent processing. This step ensures that the titanium powder is fully impregnated with resin, that is, completely coated with resin. This prevents the titanium powder from oxidizing due to contact with air during subsequent processing, thereby ensuring product quality.

[0049] S3. Add a solvent to the mixture of resin and titanium powder to adjust the viscosity of the mixture and form a slurry suitable for roller pressing. To form a slurry suitable for roller pressing, a solvent needs to be added to the mixture of resin and titanium powder. The solvent mentioned here can be water, alcohol, or ester, etc. The specific solvent chosen depends on the type of base resin and the desired slurry properties. By adding a solvent, the viscosity of the mixture can be effectively adjusted, making it easier to process.

[0050] S4. The prepared slurry undergoes vacuum degassing to remove air bubbles and volatile components, ensuring the slurry's uniformity and stability. In this step, the prepared slurry is degassed under vacuum. This process removes air bubbles and volatile components, ensuring the slurry's uniformity and stability. This is crucial for the subsequent rolling process and the final quality of the metallic paint.

[0051] S5. The vacuum-degassed slurry is evenly fed into the roller press to ensure that the titanium powder is effectively pressed into flakes. The roller pressing process is carried out through multiple stages to improve the forming effect of the flake titanium powder. The vacuum-degassed slurry is evenly fed into the roller press. Through the multi-stage roller pressing process, the titanium powder is effectively pressed into flakes. This step is crucial for improving the forming effect of the flake titanium powder and directly affects the quality and appearance of the final metallic automotive paint.

[0052] S6. Using a slurry containing flake titanium powder, metallic automotive paint is prepared by mixing according to the metallic paint formula. In this step, a slurry containing flake titanium powder is mixed according to the metallic paint formula to finally produce metallic automotive paint. This step is the final stage of the entire process and a key link in product quality control.

[0053] In this embodiment, in step S1, the automotive paint coating resin includes amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane.

[0054] Specifically, in step S3, the solvent used is water, alcohol, or ester.

[0055] Furthermore, in step S3, the content of titanium powder in the slurry is controlled within the range of 5-50%.

[0056] Furthermore, in step S6, the inter-roller pressure of the roller press is controlled within the range of 50-350 MPa.

[0057] Furthermore, in step S3, a mixer is used to uniformly stir the mixture when adjusting its viscosity.

[0058] Furthermore, in step S5, the pressure rollers in the roller press are horizontally adjusted by an external cylinder, thereby achieving roller spacing adjustment.

[0059] Furthermore, in step S5, the roller press includes multiple pressure rollers 1 arranged symmetrically. The pressure rollers 1 are divided into upper and lower groups. The pressure rollers 1 are fixed by a mounting frame 2. A top plate 3 is installed on the top of the mounting frame 2. A mixer 4 is installed in the middle of the top plate 3. An upper baffle assembly 5 and a lower baffle assembly 6 are installed in the middle of the mounting frame 2 near the pressure rollers 1.

[0060] Furthermore, the top of the mixer 4 is provided with a feeding port for easy feeding, and the bottom of the pressure roller 1 is provided with a receiving groove 7 for easy receiving operation.

[0061] Furthermore, the upper baffle assembly 5 and the lower baffle assembly 6 have the same structure, both consisting of two parallel plates located before and after the pressure roller 1. The upper end of the parallel plate is provided with an upper opening 61, and the lower end of the parallel plate is provided with a lower opening 62. The upper pressure roller 1 is located inside the upper opening 61, and the lower pressure roller 1 is located inside the lower opening 62. A baffle 63 is installed on the side of the parallel plate between the upper and lower pressure rollers 1 to facilitate side blocking when the material falls and prevent the material from leaking out.

[0062] During the rolling process, the slurry is first thoroughly mixed in a mixer to ensure its uniformity. Then, the slurry is fed into the rolling mill, where it undergoes multi-stage rolling between two sets of pressure rollers. During this process, the upper and lower baffle assemblies effectively prevent material leakage, ensuring that all material is effectively pressed into flake titanium powder. Finally, the rolled flake titanium powder falls into a receiving trough for subsequent collection and processing.

[0063] Finally, it should be noted that the electronic components in the roller press in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing flake-shaped titanium powder, characterized in that: Includes the following steps: S1. Select the base resin. Choose a water-based or oil-based automotive paint resin. Prepare the titanium powder that needs to be pressed into flakes. S2. Mix the selected base resin with titanium powder to ensure that the titanium powder is fully impregnated with the resin. The purpose of this step is to coat the titanium powder with resin to prevent it from oxidizing due to contact with air during subsequent processing. S3. Add solvent to the mixture of resin and titanium powder to adjust the viscosity of the mixture and form a slurry suitable for rolling. S4. The prepared slurry is subjected to vacuum degassing to remove air bubbles and volatile components, ensuring the uniformity and stability of the slurry. S5. The slurry that has undergone vacuum degassing is evenly fed into the roller press to ensure that the titanium powder is effectively pressed into flakes. The roller pressing process is carried out through multi-stage roller pressing to improve the forming effect of the flake titanium powder. S6. Metallic automotive paint is prepared by using a slurry containing flake titanium powder and mixing it according to a metallic paint formula. In step S5, the roller press includes multiple pressure rollers (1) arranged symmetrically. The pressure rollers (1) are divided into upper and lower groups. The pressure rollers (1) are fixed by a mounting frame (2). A top plate (3) is installed on the top of the mounting frame (2). A mixer (4) is installed in the middle of the top plate (3). An upper baffle assembly (5) and a lower baffle assembly (6) are installed in the middle of the mounting frame (2) near the pressure rollers (1). The mixer (4) is provided with a feeding port at the top and a receiving groove (7) is provided below the pressure roller (1). The upper baffle assembly (5) and the lower baffle assembly (6) have the same structure, both consisting of two parallel plates located in front of and behind the pressure roller (1). The upper end of the parallel plate is provided with an upper opening (61), and the lower end of the parallel plate is provided with a lower opening (62). The upper pressure roller (1) is located inside the upper opening (61), and the lower pressure roller (1) is located inside the lower opening (62). A baffle (63) is installed on the side of the parallel plate between the upper and lower pressure rollers (1).

2. The method for preparing sheet-like titanium powder according to claim 1, characterized in that: In step S1, the automotive paint coating resin includes amino resin, alkyd resin, polyester resin, acrylic resin, or polyurethane.

3. The method for preparing flake titanium powder according to claim 1, characterized in that: In step S3, the solvent used is water, alcohol, or ester.

4. The method for preparing sheet-like titanium powder according to claim 1, characterized in that: In step S3, the content of titanium powder in the slurry is controlled within the range of 5-50%.

5. The method for preparing flake titanium powder according to claim 1, characterized in that: In step S5, the inter-roller pressure of the roller press is controlled within the range of 50-350 MPa.

6. The method for preparing flake titanium powder according to claim 1, characterized in that: In step S3, a mixer is used to uniformly stir the mixture when adjusting its viscosity.

7. The method for preparing flake titanium powder according to claim 1, characterized in that: In step S5, the pressure rollers in the roller press are horizontally adjusted by an external cylinder, thereby achieving roller spacing adjustment.

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