Metallic color high-shading PCABS material as well as preparation method and application thereof

Abstract

The invention provides a metallic color high-shading PCABS material and a preparation method and application thereof, and the metallic color high-shading PCABS material comprises the following components in parts by weight: 30-80 parts of PC resin, 5-30 parts of AS resin, 5-60 parts of ABS resin, 3-10 parts of a compatilizer, 1-5 parts of an opacifying agent, 0.2-1.5 parts of a weather-resistant agent and 0.2-0.6 part of an antioxidant. The opacifying agent comprises the following components in parts by weight: 50-80 parts of metal powder, 10-30 parts of a metal powder modifier and 10-20 parts of a lubricant. The opacifying agent used in the invention comprises the metal powder and the metal powder modifier, and the metal powder modifier can pretreat the metal powder, so that agglomerates generated by local agglomeration of metal powder particles are dissociated, an electrostatic stabilization effect and a steric hindrance stabilization effect are formed, and the metal particles are uniformly distributed in a base material; the local light leakage phenomenon of a final product is effectively avoided, and the using amount of metal powder is indirectly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PCABS material modification, and particularly to a metal color high light shielding PCABS material and a preparation method and application thereof. BACKGROUND

[0002] PCABS (polycarbonate / acrylonitrile-butadiene-styrene copolymer) is a material that combines the advantages of PC and ABS through blending modification. Its heat resistance is between that of PC and ABS, but in terms of impact resistance, PCABS is usually higher than both PC and ABS, effectively avoiding the stress cracking problem of PC materials and being easy to process like ABS. PCABS alloy material is widely used in industrial, automotive, electronic consumer goods and other fields due to its excellent comprehensive performance.

[0003] In the field of electronic consumer goods, some components have very high requirements for material light shielding, such as the display screen frame of a notebook computer. The frame of a domestic notebook computer usually uses a large amount of carbon black filling to make a common black notebook computer, and the frame of some high-end models uses a large amount of titanium dioxide filling to design a bright white color. The display screen frame of an Apple notebook computer usually uses aluminum metal material, and through an anodizing process, more colors can be achieved, but this solution is too expensive, and the metal material makes the notebook computer more bulky and inconvenient to carry. SUMMARY

[0004] To overcome the problems in the related art, one of the purposes of the present application is to provide a metal color high light shielding PCABS material, which can meet the requirement of not higher than 0.01% transmittance at 1mm thickness with an opacifier addition amount of less than 5wt%, and ensure that the physical performance retention rate of the PCABS material is excellent.

[0005] A metal color high light shielding PCABS material comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibilizer 3-10 parts, opacifier 1-5 parts, weathering agent 0.2-1.5 parts, and antioxidant 0.2-0.6 parts.

[0006] The opacifier comprises the following components in parts by weight: metal powder 50-80 parts, metal powder modifier 10-30 parts, and lubricant 10-20 parts.

[0007] In the preferred technical solution of the present application, the metal powder is aluminum powder.

[0008] In the preferred technical solution of the present application, the metal powder modifier is at least one of an alkyl ammonium salt, an alkyl phosphonium salt, and an alkyl sulfonium salt.

[0009] In the preferable technical solution of the present application, the lubricant is at least one of ethylene bis-stearamide, pentaerythritol stearate, oleic acid amide, erucic acid amide, magnesium stearate and calcium stearate.

[0010] In the preferable technical solution of the present application, the weathering agent comprises at least one of light stabilizer and ultraviolet light absorber.

[0011] In the preferable technical solution of the present application, the metal color high light-shielding PCABS material further comprises 0.2-0.5 parts of color powder.

[0012] In the preferable technical solution of the present application, the compatilizer is MBS resin.

[0013] The second purpose of the present application is to provide a preparation method of the metal color high light-shielding PCABS material, which is used for preparing the metal color high light-shielding PCABS material as described above, and comprises the following steps:

[0014] The metal powder, the metal powder modifier and the lubricant are weighed according to the weight fraction, and are mixed uniformly to form a light-shielding agent;

[0015] The PC resin, the AS resin, the ABS resin, the compatilizer, the light-shielding agent, the weathering agent and the antioxidant are weighed according to the weight fraction, and are mixed uniformly;

[0016] The uniformly mixed components are put into an extruder for sufficient melt blending, and the metal color high light-shielding PCABS material is obtained after extrusion, cooling and granulation.

[0017] In the preferable technical solution of the present application, the extruder is a double-screw extruder, and when the metal color high light-shielding PCABS material is prepared, the processing temperature of the double-screw extruder is as follows: the temperature of the first zone is 210℃, the temperature of the second zone is 250℃, the temperature of the third zone is 250℃, the temperature of the fourth zone is 250℃, the temperature of the fifth zone is 240℃, the temperature of the sixth zone is 245℃, the temperature of the seventh zone is 250℃, the temperature of the eighth zone is 250℃, and the temperature of the die head is 250℃.

[0018] The third purpose of the present application is to provide an application of the metal color high light-shielding PCABS material, and the metal color high light-shielding PCABS material as described above is used for the display screen frame of IT equipment.

[0019] The present application has the following beneficial effects:

[0020] The application provides a metal color high light shielding PCABS material, wherein the light shielding agent contains metal powder and a metal powder modifier, the metal powder modifier can pretreat the metal powder, dissociate the agglomerates generated by local agglomeration of the metal powder particles, form electrostatic stabilization and steric hindrance stabilization, make the metal particles uniformly distributed in the base material, effectively avoid the local light leakage phenomenon of the final product, and indirectly reduce the amount of the metal powder.

[0021] The application provides a preparation method of the metal color high light shielding PCABS material, the metal color high light shielding PCABS material is obtained through sufficient melt blending of an extruder, extrusion, cooling and granulation, the preparation method is simple and efficient, and is convenient to operate.

[0022] The metal color high light shielding PCABS material can be used for the display screen frame of an IT device. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A flowchart for preparing the light shielding agent in the embodiment of the application is shown in the figure;

[0024] Figure 2 A flowchart for preparing the metal color high light shielding PCABS material in the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0025] Preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0026] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0027] It should be understood that, although the terms "first", "second", "third", etc. can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0028] The light shielding material in the prior art can only be black and white, which has a great color limitation. When the product needs to achieve a very high light shielding property, the addition amount of carbon black is not less than 5%, and the addition amount of titanium dioxide is not less than 12%. The addition of too much filler will reduce the physical properties of the material.

[0029] The present application is different from the existing light shielding PCABS material, and creatively selects to use metal powder, metal powder modifier and lubricant to prepare a light shielding agent, and a small amount of addition achieves a high light shielding effect. The light shielding agent used in the present application contains a metal powder modifier, which can pretreat the metal powder, dissociate the agglomerates generated by the local agglomeration of metal powder particles, form electrostatic stabilization and steric hindrance stabilization, and make the metal particles uniformly distributed in the base material, thereby indirectly reducing the amount of metal powder and effectively avoiding the local light leakage phenomenon of the final product.

[0030] Meanwhile, the metal color light shielding PCABS material of the present application can be adjusted to various metal colors by adding different color powders, can meet the market demand for the diversity of appearance color, and can achieve a metal texture effect, improve the product appearance and taste, and has high practicality and obvious cost advantage, and the process flow is simple.

[0031] The metal color high light shielding PCABS material provided in the present application comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibility agent 3-10 parts, light shielding agent 1-5 parts, weather resistant agent 0.2-1.5 parts, and antioxidant 0.2-0.6 parts.

[0032] The light shielding agent comprises the following components in parts by weight: metal powder 50-80 parts, metal powder modifier 10-30 parts, and lubricant 10-20 parts.

[0033] Specifically, the metal powder in the present application can be aluminum powder. The metal powder provides light shielding property for the PCABS material, so that it has a metal color appearance, and can be changed to more metal colors by adding color powder.

[0034] The metal powder modifier is used for treating the metal powder, so that the agglomerates formed between the particles are dissociated, electrostatic steric stabilization is formed, dispersion is promoted and stability is maintained, and the metal powder particles are more easily and regularly floated on the surface of the material to improve the light shielding efficiency. The metal powder modifier is at least one of an alkyl ammonium salt, an alkyl phosphonium salt and an alkyl sulfonium salt. The alkyl ammonium salt is at least one of cetyltrimethylammonium bromide CTAB, octadecyltrimethylammonium chloride STAC and dioctadecyl dimethyl ammonium chloride DODMAC. The alkyl phosphonium salt is, for example, tetradecyl tributyl phosphonium bromide and the like. Among them, the alkyl phosphonium salt and the alkyl sulfonium salt not only have electrostatic steric stabilization effect on the metal particles, but also have better heat resistance, and can also be used as antistatic agents in PCABS materials.

[0035] When the metal powder is aluminum powder, the metal powder modifier can be used for pretreating the aluminum powder, dissociating the agglomerates generated by local agglomeration of the aluminum powder particles, forming electrostatic stabilization and steric stabilization, and making the aluminum powder particles uniformly distributed in the base material, so as to indirectly reduce the amount of aluminum powder.

[0036] The lubricant is used to ensure the internal and external lubrication of the sunscreen agent during preparation and subsequent double-screw extrusion granulation. The lubricant is at least one of ethylene bis-stearamide, pentaerythritol stearate, oleic acid amide, erucic acid amide, magnesium stearate and calcium stearate.

[0037] The melt index of the PC resin is above 30 g / 10 min, the melt index of the AS resin is between 10 g / 10 min and 50 g / 10 min, and the melt index of the ABS resin is between 10 g / 10 min and 50 g / 10 min. The PC, AS and ABS resins provide the performance basis.

[0038] The compatibilizer provides compatibility for the material and improves the comprehensive physical properties. If the compatibilizer is not used, the toughness of the material is very poor. The compatibilizer is an MBS resin.

[0039] The sunscreen agent provides high light shielding property for the material, and its high dispersion property can prevent the final product from having local light leakage and ensure the stability of the light shielding performance of the product at a low addition amount.

[0040] The role of the weather-resistant agent is to ensure the long-term aging resistance of the material and ensure that the material remains unchanged in color without yellowing after being used for many years. The weather-resistant agent is at least one of light stabilizer 770, 944, ultraviolet absorber UV-P, UV-234 and UV-360, and is preferably a combination of 770 and UV-P.

[0041] The antioxidant is used for aging resistance in the processing process, the main antioxidant can combine the active free radicals generated in the processing process to generate hydroperoxide, and the auxiliary antioxidant promotes the decomposition of the hydroperoxide, and finally generates small molecular substances which are pumped away by the vacuum pump. The antioxidant is at least one of 1010 and 168.

[0042] The toner is used to adjust the final appearance color. The toner is at least one of common toners such as 179 red, iron red, titanium yellow, TS yellow, 3G orange, ultramarine blue, ultramarine purple, 511A, 2B blue, and carbon black.

[0043] As Figure 2 The application provides a preparation method of a metal color high-shading PCABS material.

[0044] S1: PC resin, AS resin, ABS resin, compatibilizer, shading agent, weathering agent, antioxidant are weighed according to the weight fraction, and the toner is selected according to the actual situation to obtain composition B.

[0045] As Figure 1 indicated, the preparation method of the shading agent comprises the following steps:

[0046] S11: metal powder, metal powder modifier and lubricant are weighed according to the weight fraction to obtain composition A;

[0047] S12: the composition A is added into a powdering machine and is mixed at a high speed for 4 min;

[0048] S13: the treated composition A is poured out and is used as the shading agent.

[0049] S2: the composition B is added into a high-speed mixer, is mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and is taken out after the material mixing is completed for processing;

[0050] S3: the temperature of the double-screw extruder is set, and the temperature of each temperature zone of the double-screw extruder is set as follows: the temperature of the first zone is 210 DEG C, the temperature of the second zone is 250 DEG C, the temperature of the third zone is 250 DEG C, the temperature of the fourth zone is 250 DEG C, the temperature of the fifth zone is 240 DEG C, the temperature of the sixth zone is 245 DEG C, the temperature of the seventh zone is 250 DEG C, the temperature of the eighth zone is 250 DEG C, and the temperature of the die head is 250 DEG C.

[0051] S4: after the temperature of the processing equipment is stabilized, the equipment is started and is cleaned, then the composition B is added into the main feeding, the rotating speed of the double screw, the feeding speed and the water length are adjusted, the granulation is performed by using a pelletizer, and the metal color high-shading PCABS material particles are prepared, which can be used for injection molding to prepare products.

[0052] The metal color high-shading PCABS material provided by the application can be used for the display screen frame of an IT device, can block stray light and reduce glare, and can also consider physical protection.

[0053] The present application is further explained by the following examples, in which the materials were selected as follows:

[0054] The metal powder is aluminum strip (an article containing 80% aluminum powder, the rest is wax, and a compatible agent), which is purchased from Zhuhai Aika Special Pigment Co., Ltd., and the model number is at least one of 09-20B, 12-20B, 15-20B, 19-20B, and 23-10B.

[0055] It should be noted that: the first two digits of the aluminum powder model represent the D50 particle size, and the two digits after the dash represent the carrier content, and B represents the product shape as a strip.

[0056] The metal powder modifier is purchased from Sichuan Ruikai Bang Chemical Co., Ltd., and is at least one of cetyltrimethylammonium bromide CTAB, octadecyltrimethylammonium chloride STAC, and dioctadecyl dimethyl ammonium chloride DODMAC.

[0057] The lubricant is at least one of ethylene bis-stearamide, pentaerythritol stearate, oleic acid amide, erucic acid amide, magnesium stearate, and calcium stearate, and further, the present application preferably pentaerythritol stearate, abbreviated as PETS. The selected PETS is preferably from the LONZA Group in the United States, and the model number is LONZA P.

[0058] The melt index of the PC resin is above 30 g / 10 min, and is preferably LG-1301EP30 from LG Chemical in Huizhou.

[0059] The melt index of the AS resin is between 10 g / 10 min and 50 g / 10 min, and is preferably AS-KFA-130 purchased from Jinfatech.

[0060] The melt index of the ABS resin is between 10 g / 10 min and 50 g / 10 min, and is preferably ABS 0215H purchased from Jilin Petrochemical.

[0061] The compatible agent is MBS, which is purchased from Japan Zhongyuan, and the model number is at least one of M-701, M-722, and M-732.

[0062] The light shielding agent is prepared by the above light shielding agent preparation method.

[0063] The weathering agent is at least one of light stabilizer 770, 944, and ultraviolet absorbers UV-P, UV-234, and UV-360, and is preferably a combination of 770 and UV-P. The selected weathering agent is purchased from Tianjin Li'anlong.

[0064] The antioxidant is at least one of 1010, 1076, and 168, and is purchased from Tianjin Li'anlong.

[0065] The combination toner is at least one of 179 red, iron red, titanium yellow, TS yellow, 3G orange, cyan, violet, 511A, 2B blue, and carbon black.

[0066] The carbon black mentioned in the comparative example was purchased from Cabot, with the brand M800.

[0067] The titanium dioxide mentioned in the comparative example was purchased from KRONOS, with the brand R-105.

[0068] Example 1

[0069] The metal color high light-shielding PCABS material provided in the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light-shielding agent 2 parts, weathering agent 0.4 parts, and antioxidant 0.4 parts, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder with model 09-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0070] The preparation method of the metal color high light-shielding PCABS material provided in the embodiment comprises:

[0071] S1: PC resin, AS resin, ABS resin, compatibilizer, light-shielding agent, weathering agent, and antioxidant are weighed in parts by weight to form a composition B.

[0072] The preparation method of the light-shielding agent comprises:

[0073] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to form a composition A;

[0074] S12: the composition A is added to a powdering machine and mixed at high speed for 4 min;

[0075] S13: the treated composition A is poured out and used as a light-shielding agent.

[0076] S2: the composition B is added to a high-speed mixer and mixed at room temperature for 2 min at a speed of 1200 rad / min, and then the material is taken out for processing;

[0077] S3: the temperature of the double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of zone 1 is 210°C, the temperature of zone 2 is 250°C, the temperature of zone 3 is 250°C, the temperature of zone 4 is 250°C, the temperature of zone 5 is 240°C, the temperature of zone 6 is 245°C, the temperature of zone 7 is 250°C, the temperature of zone 8 is 250°C, and the temperature of the die head is 250°C.

[0078] S4: After the temperature of the processing equipment is stable, the equipment is started and cleaned, then composition B is added to the main feeding, the speed of the double screw is adjusted, the feeding speed and the water length are adjusted, and the metal color high light shielding PCABS material particles are prepared by granulating through the granulator, which can be used for injection molding into products.

[0079] Example 2

[0080] The metal color high light shielding PCABS material provided in this embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light shielding agent 2 parts, weathering agent 0.4 parts, and antioxidant 0.4 parts, wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 12-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0081] The preparation method of the metal color high light shielding PCABS material provided in this embodiment comprises:

[0082] S1: PC resin, AS resin, ABS resin, compatibilizer, light shielding agent, weathering agent, and antioxidant are weighed in parts by weight to form composition B.

[0083] The preparation method of the light shielding agent comprises:

[0084] S11: Metal powder, metal powder modifier, and lubricant are weighed in parts by weight to form composition A;

[0085] S12: Composition A is added to a powdering machine and mixed at high speed for 4 minutes;

[0086] S13: The treated composition A is poured out and used as a light shielding agent.

[0087] S2: Composition B is added to a high-speed mixer and mixed at room temperature for 2 minutes at a speed of 1200 rad / min, and then the material mixture is taken out for processing;

[0088] S3: The temperature of the double screw extruder is set, and the temperature of each zone of the double screw extruder is set as follows: the temperature of zone 1 is 210℃, the temperature of zone 2 is 250℃, the temperature of zone 3 is 250℃, the temperature of zone 4 is 250℃, the temperature of zone 5 is 240℃, the temperature of zone 6 is 245℃, the temperature of zone 7 is 250℃, the temperature of zone 8 is 250℃, and the temperature of the die head is 250℃.

[0089] S4: After the temperature of the processing equipment is stable, the equipment is started and cleaned, then composition B is added to the main feeding, the speed of the double screw is adjusted, the feeding speed and the water length are adjusted, and the metal color high light shielding PCABS material particles are prepared by granulating through the granulator, which can be used for injection molding into products.

[0090] Example 3

[0091] The metal color high light-shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibility agent 4 parts, light-shielding agent 2 parts, weather-resistant agent 0.4 parts, and antioxidant 0.4 parts, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 15-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0092] The embodiment provides a preparation method of a metal color high light-shielding PCABS material, comprising the following steps.

[0093] S1: PC resin, AS resin, ABS resin, compatibility agent, light-shielding agent, weather-resistant agent, and antioxidant are weighed in parts by weight to obtain a composition B.

[0094] The preparation method of the light-shielding agent comprises the following steps.

[0095] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to obtain a composition A;

[0096] S12: the composition A is added to a powdering machine and mixed at a high speed for 4 min;

[0097] S13: the treated composition A is poured out and used as a light-shielding agent.

[0098] S2: the composition B is added to a high-speed mixer, mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and then taken out for processing;

[0099] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0100] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to a main feeding device, and the rotating speed of the double screw, the feeding speed, and the water length are adjusted, the metal color high light-shielding PCABS material particles are prepared by a granulator, and the particles can be used for injection molding.

[0101] Embodiment 4

[0102] The metal color high light shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibility agent 4 parts, light shielding agent 2 parts, weather resistant agent 0.4 parts, and antioxidant 0.4 parts, wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 19-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0103] The embodiment provides a preparation method of the metal color high light shielding PCABS material.

[0104] S1: PC resin, AS resin, ABS resin, compatibility agent, light shielding agent, weather resistant agent, and antioxidant are weighed in parts by weight to obtain a composition B.

[0105] The preparation method of the light shielding agent comprises the following steps.

[0106] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to obtain a composition A.

[0107] S12: the composition A is added to a powdering machine and mixed at a high speed for 4 min.

[0108] S13: the treated composition A is poured out and used as the light shielding agent.

[0109] S2: the composition B is added to a high-speed mixer, mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and then taken out for processing.

[0110] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0111] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to a main feeding device, the rotating speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light shielding PCABS material particles are prepared and can be used for injection molding.

[0112] Example 5

[0113] The metal color high light shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibility agent 4 parts, light shielding agent 2 parts, weather resistant agent 0.4 part, and antioxidant 0.4 part, wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 23-10B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0114] The embodiment provides a preparation method of the metal color high light shielding PCABS material.

[0115] S1: PC resin, AS resin, ABS resin, compatibility agent, light shielding agent, weather resistant agent and antioxidant are weighed in parts by weight to obtain a composition B.

[0116] The preparation method of the light shielding agent comprises the following steps.

[0117] S11: metal powder, metal powder modifier and lubricant are weighed in parts by weight to obtain a composition A.

[0118] S12: the composition A is added into a powdering machine and mixed at a high speed for 4 min.

[0119] S13: the treated composition A is poured out and used as the light shielding agent.

[0120] S2: the composition B is added into a high-speed mixer, mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and then taken out for processing.

[0121] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0122] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added into a main feeding device, the rotating speed of the double screw, the feeding speed and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light shielding PCABS material particles are prepared, which can be used for injection molding.

[0123] Example 6

[0124] The metal color high light shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibility agent 4 parts, light shielding agent 1 part, weather resistant agent 0.4 part, and antioxidant 0.4 part, wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 09-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0125] The embodiment provides a preparation method of the metal color high light shielding PCABS material.

[0126] S1: PC resin, AS resin, ABS resin, compatibility agent, light shielding agent, weather resistant agent and antioxidant are weighed in parts by weight to obtain a composition B.

[0127] The preparation method of the light shielding agent comprises the following steps.

[0128] S11: metal powder, metal powder modifier and lubricant are weighed in parts by weight to obtain a composition A.

[0129] S12: the composition A is added into a powdering machine and mixed at a high speed for 4 min.

[0130] S13: the treated composition A is poured out and used as the light shielding agent.

[0131] S2: the composition B is added into a high-speed mixer, mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and then taken out for processing.

[0132] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0133] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added into a main feeding device, the rotating speed of the double screw, the feeding speed and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light shielding PCABS material particles are prepared, which can be used for injection molding.

[0134] Example 7

[0135] The metal color high light shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibility agent 4 parts, light shielding agent 1 part, weather resistant agent 0.4 part, and antioxidant 0.4 part, wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 12-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts.

[0136] The embodiment provides a preparation method of the metal color high light shielding PCABS material.

[0137] S1: PC resin, AS resin, ABS resin, compatibility agent, light shielding agent, weather resistant agent and antioxidant are weighed in parts by weight to obtain a composition B.

[0138] The preparation method of the light shielding agent comprises the following steps.

[0139] S11: metal powder, metal powder modifier and lubricant are weighed in parts by weight to obtain a composition A.

[0140] S12: the composition A is added into a powdering machine and mixed at high speed for 4 min.

[0141] S13: the treated composition A is poured out and used as the light shielding agent.

[0142] S2: the composition B is added into a high-speed mixer, mixed at room temperature for 2 min at a rotating speed of 1200 rad / min, and then taken out for processing.

[0143] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0144] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added into a main feeding device, the rotating speed of the double screw, the feeding speed and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light shielding PCABS material particles are prepared, which can be used for injection molding.

[0145] Embodiment 8

[0146] The metal color high light shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibility agent 3-10 parts, toughening agent 3 parts, light shielding agent 2 parts, weather resistant agent 0.4 parts, antioxidant 0.4 parts, wear resistant agent 0.5 parts, and color powder 0.1 part; wherein the light shielding agent comprises the following components in parts by weight: aluminum powder of type 09-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts; and the color powder comprises 179 red 0.02 part and 3G orange 0.08 part.

[0147] The embodiment provides a preparation method of the metal color high light shielding PCABS material, comprising the following steps:

[0148] S1: PC resin, AS resin, ABS resin, compatibility agent, light shielding agent, weather resistant agent, antioxidant, and color powder are weighed in parts by weight to obtain a composition B.

[0149] The preparation method of the light shielding agent comprises the following steps:

[0150] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to obtain a composition A;

[0151] S12: the composition A is added into a powdering machine and mixed at a high speed for 4 minutes;

[0152] S13: the treated composition A is poured out and used as the light shielding agent.

[0153] S2: the composition B is added into a high-speed mixer, mixed at room temperature for 2 minutes at a rotating speed of 1200 rad / min, and then taken out for processing;

[0154] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0155] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added into a main feeding device, the rotating speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light shielding PCABS material particles are prepared, which can be used for injection molding.

[0156] Example 9

[0157] The metal color high light-shielding PCABS material provided by the embodiment comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibility agent 3-10 parts, toughening agent 3 parts, light-shielding agent 2 parts, weather-resistant agent 0.4 parts, antioxidant 0.4 parts, wear-resistant agent 0.5 parts, and color powder 0.03 parts; wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 09-20B 60 parts, metal powder modifier 20 parts, and lubricant 20 parts; and the color powder comprises M800 carbon black 0.02 parts and 2B blue 0.01 parts.

[0158] The embodiment provides a preparation method of the metal color high light-shielding PCABS material.

[0159] S1: PC resin, AS resin, ABS resin, compatibility agent, light-shielding agent, weather-resistant agent, antioxidant, and color powder are weighed in parts by weight to obtain a composition B.

[0160] The preparation method of the light-shielding agent comprises the following steps.

[0161] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to obtain a composition A;

[0162] S12: the composition A is added into a powdering machine and mixed at a high speed for 4 minutes.

[0163] S13: the treated composition A is poured out and used as the light-shielding agent.

[0164] S2: the composition B is added into a high-speed mixer, mixed at room temperature for 2 minutes at a rotating speed of 1200 rad / min, and then taken out for processing.

[0165] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of a first zone is 210 DEG C, the temperature of a second zone is 250 DEG C, the temperature of a third zone is 250 DEG C, the temperature of a fourth zone is 250 DEG C, the temperature of a fifth zone is 240 DEG C, the temperature of a sixth zone is 245 DEG C, the temperature of a seventh zone is 250 DEG C, the temperature of an eighth zone is 250 DEG C, and the temperature of a die head is 250 DEG C.

[0166] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added into a main feeding device, the rotating speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by using a pelletizer, and finally the metal color high light-shielding PCABS material particles are prepared, which can be used for injection molding.

[0167] Comparative Example 1

[0168] A metal color high light-shielding PCABS material provided by Comparative Example 1 comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light-shielding agent 1 part, weathering agent 0.4 parts, antioxidant 0.4 parts, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 15-20B 60 parts, metal powder modifier 20 parts, lubricant 20 parts.

[0169] A preparation method of a metal color high light-shielding PCABS material provided by Comparative Example 1 comprises the following steps:

[0170] S1: PC resin, AS resin, ABS resin, compatibilizer, light-shielding agent, weathering agent, and antioxidant are weighed in parts by weight to form a composition B.

[0171] The preparation method of the light-shielding agent comprises the following steps:

[0172] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to form a composition A;

[0173] S12: the composition A is added to a powdering machine and mixed at high speed for 4 min;

[0174] S13: the treated composition A is poured out and used as a light-shielding agent.

[0175] S2: the composition B is added to a high-speed mixer and mixed at room temperature for 2 min at a speed of 1200 rad / min, and then taken out for processing;

[0176] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of zone 1 is 210℃, the temperature of zone 2 is 250℃, the temperature of zone 3 is 250℃, the temperature of zone 4 is 250℃, the temperature of zone 5 is 240℃, the temperature of zone 6 is 245℃, the temperature of zone 7 is 250℃, the temperature of zone 8 is 250℃, and the temperature of the die head is 250℃.

[0177] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to the main feeding, and the rotation speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by a pelletizer, and a metal color high light-shielding PCABS material particle is prepared, which can be used for injection molding to form a product.

[0178] Comparative Example 2

[0179] A metal color high light-shielding PCABS material provided by Comparative Example 2 comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light-shielding agent 1 part, weathering agent 0.4 parts, antioxidant 0.4 parts, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 19-20B 60 parts, metal powder modifier 20 parts, lubricant 20 parts.

[0180] A preparation method of a metal color high light-shielding PCABS material provided by Comparative Example 2 comprises the following steps:

[0181] S1: PC resin, AS resin, ABS resin, compatibilizer, light-shielding agent, weathering agent, and antioxidant are weighed in parts by weight to form a composition B.

[0182] The preparation method of the light-shielding agent comprises the following steps:

[0183] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to form a composition A;

[0184] S12: The composition A is added to a powdering machine and mixed at high speed for 4 min.

[0185] S13: The treated composition A is poured out and used as a light-shielding agent.

[0186] S2: The composition B is added to a high-speed mixer and mixed at room temperature for 2 min at a speed of 1200 rad / min. After the material is mixed, it is taken out and used for processing.

[0187] S3: The temperature of a double-screw extruder is set. The temperature of each zone of the double-screw extruder is set as follows: the temperature of zone 1 is 210°C, the temperature of zone 2 is 250°C, the temperature of zone 3 is 250°C, the temperature of zone 4 is 250°C, the temperature of zone 5 is 240°C, the temperature of zone 6 is 245°C, the temperature of zone 7 is 250°C, the temperature of zone 8 is 250°C, and the temperature of the die head is 250°C.

[0188] S4: After the processing equipment temperature is stabilized, the equipment is started and cleaned. Then the composition B is added to the main feeding. The double-screw speed, feeding speed, and water length are adjusted. The metal color high light-shielding PCABS material particles are prepared by a granulator and can be used for injection molding to form products.

[0189] Comparative Example 3

[0190] A metal color high light-shielding PCABS material provided by Comparative Example 3 comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light-shielding agent 1 part, weathering agent 0.4 part, antioxidant 0.4 part, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 23-10B 60 parts, metal powder modifier 20 parts, lubricant 20 parts.

[0191] A preparation method of a metal color high light-shielding PCABS material provided by Comparative Example 3 comprises the following steps:

[0192] S1: PC resin, AS resin, ABS resin, compatibilizer, light-shielding agent, weathering agent, and antioxidant are weighed in parts by weight to form a composition B.

[0193] The preparation method of the light-shielding agent comprises the following steps:

[0194] S11: metal powder, metal powder modifier, and lubricant are weighed in parts by weight to form a composition A;

[0195] S12: the composition A is added to a powdering machine and mixed at high speed for 4 minutes;

[0196] S13: the treated composition A is poured out and used as a light-shielding agent.

[0197] S2: the composition B is added to a high-speed mixer and mixed at room temperature for 2 minutes at a speed of 1200 rad / min, and then the material is taken out for processing;

[0198] S3: the temperature of a double-screw extruder is set, and the temperature of each zone of the double-screw extruder is set as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 240°C, the temperature of the sixth zone is 245°C, the temperature of the seventh zone is 250°C, the temperature of the eighth zone is 250°C, and the temperature of the die head is 250°C.

[0199] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to the main feeding, and the rotation speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by a granulator, and a metal color high light-shielding PCABS material particle is prepared, which can be used for injection molding to form a product.

[0200] Comparative Example 4

[0201] A metal color high light-shielding PCABS material provided by Comparative Example 4 comprises the following components in parts by weight: PC resin 70 parts, AS resin 12 parts, ABS resin 14 parts, compatibilizer 4 parts, light-shielding agent 1 part, weathering agent 0.4 part, antioxidant 0.4 part, wherein the light-shielding agent comprises the following components in parts by weight: aluminum powder of type 09-20B 60 parts, lubricant 40 parts.

[0202] The preparation method of the metal color high light shielding PCABS material provided by Comparative Example 4 comprises:

[0203] S1: PC resin, AS resin, ABS resin, compatibilizer, light shielding agent, weather resistant agent, and antioxidant are weighed according to parts by weight to form a composition B.

[0204] The preparation method of the light shielding agent comprises:

[0205] S11: metal powder and lubricant are weighed according to parts by weight to form a composition A;

[0206] S12: the composition A is added to a powdering machine and mixed at high speed for 4 min;

[0207] S13: the treated composition A is poured out and used as a light shielding agent.

[0208] S2: the composition B is added to a high-speed mixer, mixed at room temperature for 2 min at a speed of 1200 rad / min, and then taken out for processing;

[0209] S3: the temperature of a double screw extruder is set, and the temperature of each zone of the double screw extruder is set as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 240°C, the temperature of the sixth zone is 245°C, the temperature of the seventh zone is 250°C, the temperature of the eighth zone is 250°C, and the temperature of the die head is 250°C.

[0210] S4: after the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to the main feeding, the rotation speed of the double screw, the feeding speed, and the water length are adjusted, the granulation is performed by a pelletizer, and the metal color high light shielding PCABS material particles are prepared, which can be used for injection molding.

[0211] Comparative Example 5

[0212] The white high light shielding PCABS material provided by Comparative Example 5 comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibilizer 3-10 parts, toughening agent 3 parts, titanium white powder R-1051 2 parts, weather resistant agent 0.4 parts, antioxidant 0.4 parts, and wear resistant agent 0.5 parts.

[0213] The preparation method of the white high light shielding PCABS material provided by Comparative Example 5 comprises:

[0214] S1: PC resin, AS resin, ABS resin, compatibilizer, light shielding agent, weather resistant agent, and antioxidant are weighed according to parts by weight

[0215] S2: The composition B is added to the high-speed mixer, mixed at room temperature for 2 min at a speed of 1200 rad / min, and then taken out for processing after the completion of the mixing of the materials;

[0216] S3: The temperature of the double screw extruder is set, and the temperature of each zone of the double screw extruder is set as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 240°C, the temperature of the sixth zone is 245°C, the temperature of the seventh zone is 250°C, the temperature of the eighth zone is 250°C, and the temperature of the die head is 250°C.

[0217] S4: After the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to the main feeding, the rotation speed of the double screw, the feeding speed and the water length are adjusted, and the white high-shading PCABS material particles are prepared by granulating through the pelletizer, which can be used for injection molding.

[0218] Comparative Example 6

[0219] The black high-shading PCABS material provided in Comparative Example 6 comprises the following components in parts by weight: PC resin 30-80 parts, AS resin 5-30 parts, ABS resin 5-60 parts, compatibilizer 3-10 parts, toughening agent 3 parts, carbon black M800 6 parts, weathering agent 0.4 parts, antioxidant 0.4 parts, and wear-resistant agent 0.5 parts.

[0220] The preparation method of the black high-shading PCABS material provided in Comparative Example 6 comprises:

[0221] S1: PC resin, AS resin, ABS resin, compatibilizer, shading agent, weathering agent, and antioxidant are weighed according to the weight parts.

[0222] S2: The composition B is added to the high-speed mixer, mixed at room temperature for 2 min at a speed of 1200 rad / min, and then taken out for processing after the completion of the mixing of the materials;

[0223] S3: The temperature of the double screw extruder is set, and the temperature of each zone of the double screw extruder is set as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 250°C, the temperature of the third zone is 250°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 240°C, the temperature of the sixth zone is 245°C, the temperature of the seventh zone is 250°C, the temperature of the eighth zone is 250°C, and the temperature of the die head is 250°C.

[0224] S4: After the temperature of the processing equipment is stabilized, the equipment is started and cleaned, then the composition B is added to the main feeding, the rotation speed of the double screw, the feeding speed and the water length are adjusted, and the black high-shading PCABS material particles are prepared by granulating through the pelletizer, which can be used for injection molding.

[0225] The formulations of the light shielding agents in the above examples and comparative examples are shown in Table 1, the formulations of the metallic color high light shielding PCABS materials are shown in Table 2, and the corresponding test results are shown in Table 3.

[0226] The test methods are as follows:

[0227] The tensile strength test is based on the standard GB / T 1040;

[0228] The bending strength and bending modulus test is based on the standard GB / T 9341;

[0229] The notched Izod impact strength test is based on the standard GB / T 1843;

[0230] The light transmittance is directly tested using a haze meter, and the average value is obtained by repeating the measurement 7 times for different sample plates in the same experiment;

[0231] The light transmittance tolerance is obtained by repeating the measurement 7 times for different sample plates in the same experiment, and the maximum value minus the minimum value;

[0232] The heat distortion temperature test is based on the standards GB / T 1634.1 and GB / T 1634.2;

[0233] The appearance color evaluation method is to directly name according to the visual color comparison with the standard sample plate.

[0234] Table 1 Formulations of light shielding agents in examples and comparative examples

[0235]

[0236] Table 2 Formulations of metallic color high light shielding PCABS materials in examples and comparative examples

[0237]

[0238]

[0239] Table 3 Test results of metallic color high light shielding PCABS materials in examples and comparative examples

[0240]

[0241]

[0242] Based on the above test results, the analysis is as follows:

[0243] Comparative analysis of examples 1-5, when the addition amount of the light shielding agent is 2 parts, i.e. the addition amount of the light shielding agent is 2wt% relative to the mass fraction of the AS resin, the metallic color high light shielding PCABS material with a thickness of 1mm can achieve a high light shielding effect with a light transmittance not higher than 0.01%, without the risk of local light leakage.

[0244] Comparative analysis of Examples 6-7 and Comparative Examples 1-3 shows that the light shielding property of the light shielding agent decreases as the particle size of the selected aluminum powder increases. When the particle size D50 of the selected metal powder is 12 μm or less, the light transmittance of the metal-colored high light shielding PCABS material with a thickness of 1 mm is not higher than 0.01%, and a high light shielding effect is achieved. When the particle size D50 of the metal powder is more than 12 μm, the light transmittance of the metal-colored high light shielding PCABS material with a thickness of 1 mm cannot be ensured to be not higher than 0.01% by adding only 1 part of the light shielding agent, and the corresponding formula needs to be applied to a higher thickness of the light shielding product.

[0245] Comparative analysis of Example 1 and Examples 8-9 shows that a variety of metal appearance color effects can be adjusted by adding color powder.

[0246] Comparative analysis of Example 6 and Comparative Example 4 shows that the light shielding stability of the light shielding PCABS product is poor when the light shielding agent is continuously tested for the light transmittance of different color panels in the same case without using a metal powder modifier. If the addition amount is reduced to save costs, there is a risk of partial light leakage. Moreover, the dispersibility of the aluminum powder is not good enough, which slightly affects the performance of the material.

[0247] Comparative analysis of Comparative Examples 5-6 and Examples 1-9 shows that the use of a large amount of titanium dioxide and carbon black filling affects the toughness of the material.

[0248] The metal-colored high light shielding PCABS material provided in the application can meet the market demand for the diversity of appearance color and achieve the effect of a metal texture, thereby improving the appearance and taste of the product.

[0249] The metal-colored high light shielding PCABS material provided in the application can meet the requirement of not higher than 0.01% light transmittance at a thickness of 1 mm with an addition amount of 2% of the light shielding agent, and the retention rate of the physical properties is excellent. The material can be directly used to replace the traditional light shielding material.

[0250] The metal-colored high light shielding PCABS material provided in the application contains a metal powder modifier in the light shielding agent, which can pretreat the metal powder, dissociate the agglomerates generated by the local agglomeration of the metal powder particles, form electrostatic stabilization and steric hindrance stabilization, make the metal particles uniformly distributed in the base material, effectively avoid the local light leakage phenomenon of the final product, and indirectly reduce the amount of the metal powder.

[0251] The relative arrangement of parts and steps, numerical expressions, and values set forth in the examples illustrated herein are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only and not to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail but are intended to be part of the scope of the present application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Other examples of exemplary embodiments can therefore have different values. It is noted that like references and designations can indicate like items in the drawings and, as such, once an item is defined in one drawing, further discussion of the same item in subsequent drawings can be dispensed with. In the description of the application, it is to be understood that the specific location or position relationships indicated by orientation words such as "front," "back," "up," "down," "left," "right," "transverse," "vertical," "horizontal," and "top," "bottom," etc. are generally based on the orientation or position relationships shown in the drawings and are used merely for the purpose of facilitating the description of the application and simplifying the description, and unless otherwise specified, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. The orientation words "inner," "outer" refer to the inner and outer relative to the contour of the parts themselves.

[0252] The preferred embodiments of the application described above are intended to be illustrative only and the application is not limited to the examples given herein; changes can be made by those skilled in the art, particularly in light of the foregoing teachings, without departing from the intended application. Any and all changes therefore that are within the spirit of the application are encompassed by the application.

Claims

1. A metallic-colored, high-light-blocking PCABS material, characterized in that, It includes the following components in parts by weight: 30-80 parts PC resin, 5-30 parts AS resin, 5-60 parts ABS resin, 3-10 parts compatibilizer, 1-5 parts opacifier, 0.2-1.5 parts weather resistant agent, and 0.2-0.6 parts antioxidant. The light-blocking agent comprises the following components in parts by weight: 50-80 parts of metal powder, 10-30 parts of metal powder modifier, and 10-20 parts of lubricant.

2. The metallic high-opacity PCABS material according to claim 1, characterized in that, The metal powder is aluminum powder.

3. The metallic high-opacity PCABS material according to claim 1, characterized in that, The metal powder modifier is at least one of alkylammonium salt, alkylphosphonium salt, and alkylsulfonium salt.

4. The metallic high-opacity PCABS material according to claim 3, characterized in that, The lubricant is at least one of ethylene bis-stearamide, pentaerythritol stearate, oleamide, erucamide, magnesium stearate, and calcium stearate.

5. The metallic high-opacity PCABS material according to claim 1, characterized in that, The weather-resistant agent includes at least one of light stabilizers and ultraviolet absorbers.

6. The metallic high-opacity PCABS material according to claim 1, characterized in that, The metallic high-opacity PCABS material also includes 0.2-0.5 parts of color powder.

7. The metallic high-opacity PCABS material according to claim 1, characterized in that, The compatibilizer is MBS resin.

8. A method for preparing a metallic-colored, high-opacity PCABS material, characterized in that, The preparation of a metallic high-opacity PCABS material according to any one of claims 1-7 includes: Weigh out the metal powder, metal powder modifier and lubricant according to the weight proportions, mix them evenly to form a light-blocking agent; Weigh out the PC resin, AS resin, ABS resin, compatibilizer, opacifier, weather resistant agent, and antioxidant according to the specified weight proportions, and mix them evenly. The uniformly mixed components are fed into an extruder for full melting and blending. After extrusion, cooling, and pelletizing, a metallic high-opacity PCABS material is obtained.

9. The method for preparing a metallic high-opacity PCABS material according to claim 8, characterized in that, The extruder is a twin-screw extruder. When preparing the metallic high-opacity PCABS material, the processing temperatures of the twin-screw extruder are as follows: Zone 1 temperature 210℃, Zone 2 temperature 250℃, Zone 3 temperature 250℃, Zone 4 temperature 250℃, Zone 5 temperature 240℃, Zone 6 temperature 245℃, Zone 7 temperature 250℃, Zone 8 temperature 250℃, and the die head temperature 250℃.

10. An application of a metallic high-opacity PCABS material, characterized in that, A metallic-colored, high-light-shielding PCABS material according to any one of claims 1-7 is used for the display screen bezel of IT equipment.

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