Spraying-free metal texture plastic and preparation method thereof

Abstract

The invention relates to the field of plastic preparation, and particularly discloses a spraying-free metal texture plastic and a preparation method thereof, the spraying-free metal texture plastic is mainly prepared from ABS resin, a modified pigment and an antioxidant, the modified pigment is obtained by modifying a mixed material of a modified metal pigment and pearl powder by using gamma-methacryloxypropyltrimethoxysilane; the modified pigment is obtained by modifying silver element type aluminum powder by utilizing 1-benzyl-1H-imidazole-2-mercaptan; the spraying-free plastic with high metal texture, high metal glossiness and good mechanical performance is prepared by specifically adjusting the adding proportion of all the raw materials, the surface is smooth and free of defects, and the yield is high.

Description

Technical Field

[0001] The present invention relates to the field of plastic preparation, and particularly relates to a spray-free metal-textured plastic and a preparation method thereof. Background Art

[0002] With the progress of materials science, the performance of new plastic materials has been continuously optimized, enabling plastic watch dials to gradually approach or even surpass traditional materials in terms of texture and durability, thus meeting the needs of a wider range of consumers. Plastic watch dials have firmly established their position in the market due to their advantages such as low cost, light weight, and high design flexibility.

[0003] With the improvement of social aesthetics, metal-textured plastic watch dials are increasingly favored by consumers. Traditionally, plastics achieve a metallic appearance through spraying or electroplating, but these processes are complex, costly, and cause certain pollution to the environment. In recent years, spray-free plastic technology has received much attention. This technology can present a metallic texture by directly adding metal pigments to plastics without the need for coatings or paints, which not only simplifies the preparation process, reduces costs, but also achieves green environmental protection and effective recycling. However, spray-free plastics with directly added metal pigments are prone to flow mark defects during the injection molding process, which to a certain extent limits the further development of spray-free metal-textured plastics. Summary of the Invention

[0004] The purpose of the present invention is to provide a spray-free metal-textured plastic and a preparation method thereof for the problem that spray-free plastics with directly added metal pigments in the prior art are prone to flow mark defects during the injection molding process. This spray-free metal-textured plastic is a spray-free plastic with high metal texture, high metallic gloss, and good mechanical properties, having a smooth surface without defects and a high yield.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: A spray-free metal-textured plastic is prepared from the following raw materials by weight: 70 parts to 90 parts of ABS resin 3 parts to 10 parts of modified pigment; 0.5 part to 2 parts of antioxidant; The modified pigment is obtained by modifying a mixed material of modified metal pigment and pearlescent powder with γ-methacryloxypropyltrimethoxysilane; The modified pigment is obtained by modifying silver dollar-shaped aluminum powder with 1-benzyl-1H-imidazole-2-thiol.

[0006] The spray-free plastic with metallic texture provided by the present invention is mainly prepared from ABS resin, modified pigment and antioxidant. By specifically adjusting the addition ratios of various raw materials, a spray-free plastic with high metallic texture, high metallic gloss and good mechanical properties is prepared, with a smooth surface without defects and a high yield rate.

[0007] Among them, the modified pigment used in this application is a mixed material of modified metal pigment and pearlescent powder modified with γ-methacryloxypropyltrimethoxysilane; the modified pigment is obtained by modifying silver-dollar-shaped aluminum powder with 1-benzyl-1H-imidazole-2-thiol; the silver-dollar-shaped aluminum powder is combined with 1-benzyl-1H-imidazole-2-thiol through a coordination bond, and then γ-methacryloxypropyltrimethoxysilane forms an interweaving of the modified metal pigment and the pearlescent powder through a chemical bond. Under the dual connection, the modified pigment has high dispersibility and will not have flow mark defects during the injection molding process. At the same time, under the action of the two external bonds, the silver-dollar-shaped aluminum powder and the pearlescent powder form a micro-connection, and the prepared plastic has strong metallic texture, high gloss and good mechanical properties.

[0008] Furthermore, it is prepared from the following raw materials by weight: ABS resin 75 parts to 85 parts Modified pigment 5 parts to 10 parts; Antioxidant 0.5 parts to 1.5 parts.

[0009] Furthermore, the mass ratio of the modified metal pigment to the pearlescent powder is 1:5 to 15. Preferably, the mass ratio of the modified metal pigment to the pearlescent powder is 1:10 to 15.

[0010] Furthermore, the modified metal pigment is prepared by the following method: Mix the aqueous solution of silver-dollar-shaped aluminum powder with 1-benzyl-1H-imidazole-2-thiol and keep it at a constant temperature for reaction; Filter, wash with deionized water, dry and grind to obtain the modified metal pigment; The temperature for the constant temperature reaction is 75°C to 85°C, and the holding time is 4h to 6h.

[0011] Furthermore, the added mass of 1-benzyl-1H-imidazole-2-thiol accounts for 25% to 30% of the added mass of the silver-dollar-shaped aluminum powder.

[0012] Furthermore, the modified pigment is prepared by the following method: Mix the modified metal pigment, the pearlescent powder and ethanol water and stir; Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue to stir; Dry and grind the stirred material to obtain the modified pigment; The added mass ratio of γ - methacryloyloxypropyltrimethoxysilane accounts for 15% - 20% of the modified metal pigment.

[0013] Furthermore, it also includes a foaming agent, and the added weight parts of the foaming agent are 1 part - 3 parts.

[0014] Furthermore, the foaming agent is an azo - type foaming agent.

[0015] Another object of the present invention is to provide a preparation method of the above - mentioned spray - free metallic - textured plastic.

[0016] The preparation method of the spray - free metallic - textured plastic as described above includes the following steps: Fully mix the ABS resin, modified pigment, and antioxidant using a mixer; Add the mixed material into a twin - screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain the spray - free metallic - textured plastic.

[0017] In summary, due to the adoption of the above - mentioned technical solutions, the beneficial effects of the present invention are as follows: 1. The spray - free metallic - textured plastic provided by the present invention is mainly prepared from an ABS resin, a modified pigment, and an antioxidant. By specifically adjusting the addition ratios of each raw material, a spray - free plastic with high metallic texture, high metallic gloss, and good mechanical properties is prepared, with a smooth surface and no defects, and a high yield.

[0018] 2. The modified pigment used in this application is obtained by modifying a mixed material of a modified metal pigment and pearlescent powder with γ - methacryloyloxypropyltrimethoxysilane; the modified pigment is obtained by modifying silver - dollar - shaped aluminum powder with 1 - benzyl - 1H - imidazole - 2 - thiol; the silver - dollar - shaped aluminum powder binds with 1 - benzyl - 1H - imidazole - 2 - thiol through a coordination bond, and then γ - methacryloyloxypropyltrimethoxysilane forms an interweaving of the modified metal pigment and pearlescent powder through a chemical bond. Under the dual connection, the modified pigment has high dispersibility and will not have flow mark defects during the injection molding process. At the same time, under the action of the two external bonds, a micro - connection is formed between the silver - dollar - shaped aluminum powder and the pearlescent powder, and the prepared plastic has strong metallic texture, high gloss, and good mechanical properties. Specific Embodiments

[0019] In order to make the purpose, technical solutions, and advantages of the present invention clearer, the following examples are used to further elaborate on the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Example 1 Prepare the modified metal pigment: Mix silver-dollar-shaped aluminum powder with water, and disperse it by ultrasonic waves to obtain an aqueous solution of silver-dollar-shaped aluminum powder; Add 1-benzyl-1H-imidazole-2-thiol, which is 28% of the mass of the silver-dollar-shaped aluminum powder, to the aqueous solution of silver-dollar-shaped aluminum powder, and mix; The temperature is 80 °C, and the heat preservation reaction time is 5 h; Finally, filter, wash with deionized water, dry, and grind to obtain modified metal pigment; Prepare modified pigment: Mix the modified metal pigment, pearlescent powder, and ethanol-water mixture, and stir at 5000 r / min for 30 min; among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:10, and the ethanol-water is a mixture of absolute ethanol and water with a mass ratio of 1:1; Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid, and continue stirring; Dry and grind the material obtained after stirring to obtain modified pigment; The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 18% of the modified metal pigment.

[0021] Prepare spray-free metal-textured plastic: Weigh the raw materials according to the preset weight ratio, 80 parts by weight of ABS resin, 6 parts of modified pigment, and 1 part of antioxidant.

[0022] Fully mix the ABS resin, modified pigment, and antioxidant using a mixer; Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain spray-free metal-textured plastic.

[0023] Example 2 Prepare modified metal pigment: Mix silver-dollar-shaped aluminum powder with water, and disperse it by ultrasonic waves to obtain an aqueous solution of silver-dollar-shaped aluminum powder; Add 1-benzyl-1H-imidazole-2-thiol, which is 25% of the mass of the silver-dollar-shaped aluminum powder, to the aqueous solution of silver-dollar-shaped aluminum powder, and mix; The temperature is 85 °C, and the heat preservation reaction time is 4 h; Finally, filter, wash with deionized water, dry, and grind to obtain modified metal pigment; Prepare modified pigment: Mix the modified metal pigment, pearlescent powder, and ethanol-water mixture, and stir at 5000 r / min for 30 min; among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:5, and the ethanol-water is a mixture of absolute ethanol and water with a mass ratio of 1:1; Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid, and continue stirring; Dry and grind the material obtained after stirring to obtain a modified pigment; The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 15% of the modified metal pigment.

[0024] Prepare spray-free metallic plastic: Weigh the raw materials according to a preset weight ratio, 70 parts by weight of ABS resin, 3 parts of modified pigment, and 0.5 part of antioxidant.

[0025] Fully mix the ABS resin, modified pigment, and antioxidant using a mixer; Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain spray-free metallic plastic.

[0026] Example 3 Prepare modified metal pigment: Mix silver-dollar-shaped aluminum powder with water and disperse it ultrasonically to obtain an aqueous solution of silver-dollar-shaped aluminum powder; Add 1-benzyl-1H-imidazole-2-thiol, which is 30% of the mass of the silver-dollar-shaped aluminum powder, to the aqueous solution of silver-dollar-shaped aluminum powder and mix; The temperature is 75 °C, and the heat preservation reaction time is 6 h; Finally, filter, wash with deionized water, dry, and grind to obtain a modified metal pigment; Prepare modified pigment: Mix the modified metal pigment, pearlescent powder, and ethanol-water, and stir at 5000 r / min for 30 min; among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:15, and the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1; Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring; Dry and grind the material obtained after stirring to obtain a modified pigment; The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 20% of the modified metal pigment.

[0027] Prepare spray-free metallic plastic: Weigh the raw materials according to a preset weight ratio, 90 parts by weight of ABS resin, 10 parts of modified pigment, and 2 parts of antioxidant.

[0028] Fully mix the ABS resin, modified pigment, and antioxidant using a mixer; Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain spray-free metallic plastic.

[0029] Example 4 Prepare modified metal pigment: Mix silver-dollar-shaped aluminum powder with water, and disperse it ultrasonically to obtain an aqueous solution of silver-dollar-shaped aluminum powder. Add 1-benzyl-1H-imidazole-2-thiol, which is 28% of the mass of the silver-dollar-shaped aluminum powder, to the aqueous solution of silver-dollar-shaped aluminum powder, and mix. The temperature is 82 °C, and the heat preservation reaction time is 4.5 h. Finally, filter, wash with deionized water, dry, and grind to obtain the modified metal pigment. Prepare the modified pigment: Mix the modified metal pigment, pearlescent powder, and ethanol-water. Stir at 5000 r / min for 30 min. Among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:12, and the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1. Add γ-methacryloyloxypropyltrimethoxysilane to the stirred liquid, and continue stirring. Dry and grind the material obtained after stirring to obtain the modified pigment. The added mass ratio of γ-methacryloyloxypropyltrimethoxysilane accounts for 15% of the modified metal pigment.

[0030] Prepare the spray-free metallic plastic: Weigh the raw materials according to the preset weight ratio, 75 parts by weight of ABS resin, 5 parts of modified pigment, 1.5 parts of antioxidant, and 2 parts of azo blowing agent.

[0031] Fully mix the ABS resin, modified pigment, antioxidant, and blowing agent using a mixer. Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain the spray-free metallic plastic.

[0032] Comparative Example 1 For the plastic material prepared in Comparative Example 1, compared with Example 1, the silver-dollar-shaped aluminum powder and pearlescent powder were not modified, but were directly mixed with the ABS resin and antioxidant as the metal pigment and pigment assistant to prepare the plastic.

[0033] Among them, the addition ratios of the ABS resin, silver-dollar-shaped aluminum powder, pearlescent powder, and antioxidant are the same as those of these raw materials in Example 1. The preparation process and process parameters are also the same as those in Example 1.

[0034] Fully mix the ABS resin, silver-dollar-shaped aluminum powder, pearlescent powder, and antioxidant using a mixer. Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain the spray-free metallic plastic.

[0035] Comparative Example 2 For the plastic material prepared in Comparative Example 2, the silver-dollar-shaped aluminum powder was not modified as compared with Example 1.

[0036] Prepare the modified pigment: Mix the silver-dollar-shaped aluminum powder, pearlescent powder and ethanol-water. Stir at 5000 r / min for 30 min. Among them, the mass ratio of the silver-dollar-shaped aluminum powder to the pearlescent powder is 1:10, and the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1. Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring. Dry and grind the material obtained after stirring to obtain the modified pigment. The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 18% of the silver-dollar-shaped aluminum powder.

[0037] Prepare the spray-free plastic: Weigh the raw materials according to the preset weight ratio, 80 parts by weight of ABS resin, 6 parts of modified pigment, and 1 part of antioxidant.

[0038] Fully mix the ABS resin, modified pigment and antioxidant using a mixer. Add the mixed material into a twin-screw extruder, and after extrusion, water cooling, pelletizing and drying, obtain the spray-free plastic.

[0039] Comparative Example 3 For the plastic material prepared in Comparative Example 3, the modified metal pigment and pearlescent powder were not secondarily modified as compared with Example 1. Among them, the addition ratios of the ABS resin, silver-dollar-shaped aluminum powder, pearlescent powder and antioxidant are the same as those of these several raw materials in Example 1. The preparation process and process parameters are also the same as those in Example 1.

[0040] Prepare the modified metal pigment: Mix the silver-dollar-shaped aluminum powder with water and disperse it by ultrasonic wave to obtain an aqueous solution of silver-dollar-shaped aluminum powder. Add 1-benzyl-1H-imidazole-2-thiol accounting for 28% of the mass of the silver-dollar-shaped aluminum powder to the aqueous solution of silver-dollar-shaped aluminum powder and mix. The temperature is 80 °C and the heat preservation reaction time is 5 h. Finally, filter, wash with deionized water, dry and grind to obtain the modified metal pigment. Prepare the spray-free plastic: Fully mix the ABS resin, modified pigment, pearlescent powder and antioxidant using a mixer. Add the mixed material into a twin-screw extruder, and after extrusion, water cooling, pelletizing and drying, obtain the spray-free metal texture plastic.

[0041] Comparative Example 4 The plastic material prepared in Comparative Example 4 was not subjected to secondary modification of the modified metal pigment compared with Example 1. Among them, the addition ratios of ABS resin, silver dollar-shaped aluminum powder, pearlescent powder, and antioxidant were the same as those of these raw materials in Example 1. The preparation process and process parameters were also the same as those in Example 1.

[0042] Preparation of modified metal pigment: Mix the silver dollar-shaped aluminum powder with water and disperse it ultrasonically to obtain an aqueous solution of silver dollar-shaped aluminum powder; Add 1-benzyl-1H-imidazole-2-thiol accounting for 28% of the mass of the silver dollar-shaped aluminum powder to the aqueous solution of silver dollar-shaped aluminum powder and mix; The temperature is 80 °C, and the heat preservation reaction time is 5 h; Finally, filter, wash with deionized water, dry, and grind to obtain the modified metal pigment; Preparation of modified pearlescent powder: Mix the pearlescent powder and ethanol-water, and stir at 5000 r / min for 30 min; the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1; Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring; Dry and grind the material obtained after stirring to obtain the modified pigment.

[0043] Preparation of spray-free metal-textured plastic: Fully mix the ABS resin, modified metal pigment, modified pearlescent powder, and antioxidant using a mixer; Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain the spray-free metal-textured plastic.

[0044] Comparative Example 5 In Comparative Example 5, compared with Example 1, only the mass ratio of the modified metal pigment to the pearlescent powder was changed to 1:3. The rest was the same as the preparation process in Example 1.

[0045] Preparation of modified metal pigment: Mix the silver dollar-shaped aluminum powder with water and disperse it ultrasonically to obtain an aqueous solution of silver dollar-shaped aluminum powder; Add 1-benzyl-1H-imidazole-2-thiol accounting for 28% of the mass of the silver dollar-shaped aluminum powder to the aqueous solution of silver dollar-shaped aluminum powder and mix; The temperature is 80 °C, and the heat preservation reaction time is 5 h; Finally, filter, wash with deionized water, dry, and grind to obtain the modified metal pigment; Preparation of modified pigment: Mix the modified metal pigment, pearlescent powder and ethanol-water. Stir for 30 min under the condition of 5000 r / min. Among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:3, and the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1. Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring. Dry and grind the material obtained after stirring to obtain the modified pigment. The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 18% of the modified metal pigment.

[0046] Prepare spray-free metal-textured plastic: Weigh the raw materials according to the preset weight ratio, 80 parts by weight of ABS resin, 6 parts of modified pigment, and 1 part of antioxidant.

[0047] Fully mix the ABS resin, modified pigment and antioxidant using a mixer. Add the mixed material to a twin-screw extruder, and after extrusion, water cooling, pelletizing and drying, obtain the spray-free metal-textured plastic.

[0048] Comparative Example 6 Comparative Example 6 only changes the mass ratio of the modified metal pigment to the pearlescent powder to 1:20 compared with Example 1. The rest is the same as the preparation process of Example 1.

[0049] Prepare the modified metal pigment: Mix the silver-dollar-shaped aluminum powder with water and disperse it ultrasonically to obtain an aqueous solution of silver-dollar-shaped aluminum powder. Add 1-benzyl-1H-imidazole-2-thiol accounting for 28% of the mass of the silver-dollar-shaped aluminum powder to the aqueous solution of silver-dollar-shaped aluminum powder and mix. The temperature is 80 °C and the holding reaction time is 5 h. Finally, filter, wash with deionized water, dry and grind to obtain the modified metal pigment. Prepare the modified pigment: Mix the modified metal pigment, pearlescent powder and ethanol-water. Stir for 30 min under the condition of 5000 r / min. Among them, the mass ratio of the modified metal pigment to the pearlescent powder is 1:20, and the ethanol-water is a mixed solution of absolute ethanol and water with a mass ratio of 1:1. Add γ-methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring. Dry and grind the material obtained after stirring to obtain the modified pigment. The added mass ratio of γ-methacryloxypropyltrimethoxysilane accounts for 18% of the modified metal pigment.

[0050] Prepare spray-free metal-textured plastic: Weigh the raw materials according to the preset weight ratio: 80 parts by weight of ABS resin, 6 parts of modified pigment, and 1 part of antioxidant.

[0051] Fully mix the ABS resin, modified pigment, and antioxidant using a mixer. Add the mixed material into a twin-screw extruder, and after extrusion, water cooling, pelletizing, and drying, obtain the spray-free metallic plastic.

[0052] Testing Injection mold the spray-free plastics prepared in Examples 1 - 4 and Comparative Examples 1 - 6 to prepare samples with a specification of 20 mm × 10 mm × 5 mm.

[0053] Conduct performance tests on each sample, and the test standards are as follows: Tensile strength is tested according to the ISO527 standard.

[0054] Impact strength is tested according to the ISO 180 standard.

[0055] Glossiness: According to ISO 2813.

[0056] Degree of appearance defects: 20 people evaluate the appearance of the samples, and take the average value; No appearance defects: 5 points, minor defects: 3 - 4 points, larger defects: 2 - 3 points, serious defects: 0 - 1 point.

[0057] Visual inspection of metallic feeling: 20 people visually score the samples from 1 - 5 points, and take the average value.

[0058] The test results are shown in Table 1.

[0059] Table 1 It can be seen from the test results in Table 1 that by using the technical method provided in this application, the prepared spray-free plastic has high metallic feeling, high metallic glossiness, and good mechanical properties. The surface is smooth and defect-free, and the yield rate is high.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spray-free metallic plastic, characterized in that, Prepared from the following raw materials by weight parts, 70 to 90 parts of ABS resin 3 to 10 parts of modified pigment; 0.5 to 2 parts of antioxidant; The modified pigment is obtained by modifying the mixed material of modified metal pigment and pearlescent powder with γ - methacryloxypropyltrimethoxysilane; The modified pigment is obtained by modifying silver dollar - shaped aluminum powder with 1 - benzyl - 1H - imidazole - 2 - thiol.

2. A spray-free metallic plastic, characterized in that, Prepared from the following raw materials by weight parts, 75 to 85 parts of ABS resin 5 to 10 parts of modified pigment; 0.5 to 1.5 parts of antioxidant.

3. The spray-free metallic plastic according to claim 1 or 2, characterized in that, The mass ratio of the modified metal pigment to the pearlescent powder is 1:5 to 15.

4. The spray-free metallic plastic according to claim 3, wherein The mass ratio of the modified metal pigment to the pearlescent powder is 1:10 to 15.

5. The spray-free metallic plastic according to claim 1 or 2, wherein The modified metal pigment is prepared by the following method, Mix the aqueous solution of silver dollar - shaped aluminum powder with 1 - benzyl - 1H - imidazole - 2 - thiol and keep the temperature for reaction; Filter, wash with deionized water, dry, and grind to obtain the modified metal pigment; The temperature for the heat - preservation reaction is 75°C to 85°C, and the heat - preservation time is 4 h to 6 h.

6. The spray-free metallic plastic according to claim 5, characterized in that, The added mass of 1 - benzyl - 1H - imidazole - 2 - thiol accounts for 25% to 30% of the added mass of silver dollar - shaped aluminum powder.

7. The spray-free metallic plastic according to claim 5, wherein The modified pigment is prepared by the following method, Mix the modified metal pigment, pearlescent powder and ethanol - water, and stir; Add γ - methacryloxypropyltrimethoxysilane to the stirred liquid and continue stirring; Dry and grind the material obtained after stirring to obtain the modified pigment; The added mass ratio of γ - methacryloxypropyltrimethoxysilane accounts for 15% to 20% of the modified metal pigment.

8. The spray-free metallic plastic according to claim 1 or 2, characterized in that It further includes a blowing agent, and the added weight parts of the blowing agent are 1 to 3 parts.

9. The spray-free metallic plastic according to claim 8, wherein The blowing agent is an azo blowing agent.

10. The preparation method of the spray-free metal texture plastic according to any one of claims 1-9, characterized in that, Including the following steps: Fully mix the ABS resin, modified pigment and antioxidant by using a mixer; Add the mixed material into a twin - screw extruder, and after extrusion, water cooling, pelletizing and drying, obtain the spray - free metal - textured plastic.

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