A PC / ABS material with adjustable appearance color and preparation method thereof

Abstract

The invention relates to a PC / ABS material with adjustable appearance color and a preparation method thereof, belonging to the technical field of plastic preparation. The material comprises the following raw materials in parts by weight: 35-45 parts of PC resin, 35-45 parts of ABS resin, 8-20 parts of anti-wear agent, 5-15 parts of colorant, and 5-10 parts of compatibilizer. The anti-wear agent comprises a core formed by nano-calcium carbonate and a modified polyacrylate coated on the outer layer of the nano-calcium carbonate core. The invention not only improves the wear resistance of the PC / ABS material by adding the anti-wear agent, but also improves the dispersion performance of the colorant, so that the appearance color of the obtained PC / ABS material product is more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic preparation, and in particular relates to a PC / ABS material with adjustable appearance color and a preparation method thereof. Background Art

[0002] PC / ABS composite materials have excellent mechanical and thermal properties and are widely used in the fields of automobiles, home appliances, digital products, etc. With the expansion of the field of PC / ABS composite materials, the appearance requirements of PC / ABS alloy products in various market fields are more personalized. Therefore, for PC / ABS composite materials, developing a PC / ABS composite material with adjustable appearance color is an urgent problem to be solved. At the same time, for PC / ABS composite products, its wear resistance needs to be enhanced. Summary of the invention

[0003] The object of the present invention is to provide a PC / ABS material with adjustable appearance color and a preparation method thereof.

[0004] The technical problem to be solved by the present invention is that the color of PC / ABS composite material products can be adjusted, and the wear resistance is enhanced and modified.

[0005] The first object of the present invention can be achieved by the following technical solutions:

[0006] A PC / ABS material with adjustable appearance color comprises the following raw materials in parts by weight: 35-45 parts of PC resin, 35-45 parts of ABS resin, 8-20 parts of wear-resistant agent, 5-15 parts of colorant, and 5-10 parts of compatibilizer.

[0007] Furthermore, the wear-resistant agent includes a core formed of nano-calcium carbonate and a modified polyacrylate coated on the outer layer of the nano-calcium carbonate core.

[0008] Further, the anti-wear agent is prepared by the following steps:

[0009] After the grafted calcium carbonate, the first emulsifier, the first part of methyl acrylate, the first initiator and deionized water are stirred and mixed evenly, the mixture is stirred and reacted at 60-65°C for 1.5-2h. After heating to 70-80°C, a solution containing the second initiator, the second part of methyl acrylate, the sulfonic acid monomer and deionized water is added dropwise. After the addition is completed, the mixture is stirred and reacted for 4-6h. Subsequently, the mixture is heated to 80-90°C, and a solution containing the AB2 branched monomer, the second emulsifier and deionized water is added dropwise. After the addition is complete, the mixture is stirred and reacted for 0.5-1h. Subsequently, the mixture is heated to 90-100°C, and a solution containing a palladium catalyst and deionized water is added dropwise. The mixture is stirred and reacted for 2-4h for branching reaction. The reaction is stopped, centrifuged, the precipitate is taken, washed with water, washed with alcohol, and dried to obtain a wear-resistant agent.

[0010] Furthermore, the mass ratio of the total mass of the grafted calcium carbonate, methyl acrylate and sulfonic acid monomer to the mass ratio of the AB2 branched monomer is 10:7-11:1-2.5.

[0011] Furthermore, the molar ratio of the methyl acrylate to the sulfonic acid monomer is 1:0.1-0.3.

[0012] Furthermore, the specific usage of the first emulsifier and the second emulsifier is determined according to the amount of deionized water added together, and is generally 1.5-2% of the mass of the deionized water added simultaneously.

[0013] Furthermore, the first emulsifier and the second emulsifier are of the same type, and are selected from one of fatty alcohol polyoxyethylene ether and sodium dodecylbenzene sulfonate.

[0014] Furthermore, the total mass of the first initiator and the second initiator is 2.5-4.5% of the total mass of methyl acrylate and sulfonic acid monomer.

[0015] Furthermore, the first initiator and the second initiator may be of the same type or different types, preferably, they are the same;

[0016] The first initiator and the second initiator are selected from one or both of potassium persulfate and ammonium persulfate;

[0017] The mass ratio of the first initiator to the second initiator is 1-1.5:2.

[0018] Furthermore, the mass ratio of the first part of methyl acrylate to the second part of methyl acrylate is 2-2.5:1.

[0019] Furthermore, the sulfonic acid monomer is one or more of propylene sulfonic acid, methpropylene sulfonic acid, and styrene sulfonic acid.

[0020] In the reaction process of the above-mentioned anti-wear agent, a wear-resistant agent with nano calcium carbonate as the core and modified polyacrylate as the shell is prepared by step-by-step reaction (emulsion polymerization, grafting reaction and branching reaction). Not only the inorganic filler characteristics of calcium carbonate are used to improve the wear resistance, mechanical strength and flame retardancy of PC / ABS materials, but also the interface performance between calcium carbonate and PC / ABS base material is improved by coating the modified polyacrylate on the outer layer of calcium carbonate. Remarkably, the step-by-step reaction of the present invention is easy to control. First, an inorganic-organic core-shell structure is synthesized by an emulsion method, wherein the core is inorganic calcium carbonate and the polyacrylate is the shell. Then, an AB2 branching monomer is introduced into the molecular chain of the polyacrylate in the shell layer by grafting reaction. Then, a branching reaction is used to make the grafted AB2 branching monomer and the ungrafted AB2 branching monomer undergo a hydrosilylation reaction and a self-branching reaction. Liquid polymerization and grafting reaction are double bond cross-linking reactions triggered by no initiator, and the branching reaction is a hydrosilylation reaction triggered by a palladium catalyst, so the control of each step of the reaction can be easily achieved according to the addition of the initiator and the palladium catalyst; secondly, the modified polyacrylate molecular chain of the shell contains sulfonic acid groups and hyperbranched chains (silicon oxygen chains with high flexibility), wherein the sulfonic acid groups are strong anionic groups, and in the process of mixing PC / ABS raw materials, they have been complexed with metal ions (such as iron ions, ferrous ions, titanium ions, chromium ions, zinc ions, etc.) in the colorant, thereby improving the dispersibility of the colorant. At the same time, the cavity of the hyperbranched chain can be a loading cavity for the colorant, thereby further improving the dispersibility of the colorant, that is, the wear-resistant agent not only plays a role in enhancing wear resistance, but also can serve as a dispersion carrier for the colorant, thereby avoiding the agglomeration of the colorant, and making the appearance color of the obtained PC / ABS material more stable.

[0021] Furthermore, the grafted calcium carbonate is prepared by surface modification reaction of nano calcium carbonate with a double bond siloxane coupling agent, and the specific reaction is as follows:

[0022] The nano calcium carbonate and the mixed solvent are stirred at room temperature and 200-350r / min for 20-40min, heated to 80-90°C, double bond siloxane coupling agent is added dropwise, the reaction is kept warm for 2-4h, cooled, centrifuged, the precipitate is taken, washed with water, washed with alcohol, and dried to obtain grafted calcium carbonate, wherein the mixed solvent is prepared by mixing deionized water and ethanol in a submitted ratio of 1:4-8.

[0023] Furthermore, the particle size of the nano calcium carbonate is 100-300nm.

[0024] Furthermore, the mass ratio of the nano calcium carbonate to the double bond siloxane coupling agent is 1:0.1-0.2.

[0025] Furthermore, the AB2 branched monomer is prepared by a ternary monomer prepared by the reaction of allyl chloride Grignard reagent (allyl magnesium chloride tetrahydrofuran solution) and phenyltrichlorosilane and a hydrosilylation reaction of 1,1,3,3-tetramethyldisiloxane in the presence of a palladium catalyst.

[0026] The structural formula of the ternary monomer is shown below:

[0027]

[0028] The specific operation of the reaction of allyl chloride Grignard reagent (tetrahydrofuran solution of allyl magnesium chloride) and phenyltrichlorosilane to prepare the ternary monomer is as follows:

[0029] In an ice-water bath and under stirring, phenyltrichlorosilane is slowly added dropwise to the allyl chloride Grignard reagent, and after stirring for 12-48 hours, a saturated aqueous ammonium chloride solution is added, the mixture is filtered with suction, and the filtrate is rotary evaporated to obtain a ternary monomer, wherein the molar ratio of allyl magnesium chloride to phenyltrichlorosilane in the allyl chloride Grignard reagent is 3-4:1.

[0030] The specific operation of the hydrosilylation reaction between the ternary monomer and 1,1,3,3-tetramethyldisiloxane under the action of palladium catalyst is as follows:

[0031] 1,1,3,3-tetramethyldisiloxane, palladium catalyst, ternary monomer and tetrahydrofuran are mixed evenly, heated to 60-65° C. under stirring, and reacted for 1-3 hours under stirring. The reaction is stopped, the palladium catalyst is recovered by filtration, and the filtrate is rotary evaporated to obtain AB2 branched monomer, wherein the molar ratio of 1,1,3,3-tetramethyldisiloxane to the ternary monomer is 1:0.9-1.

[0032] Furthermore, the colorant is one or more of inorganic pigments. By selecting the type of pigment and adjusting the dosage, a PC / ABS material product with adjustable appearance color is obtained, enriching the color system of PC / ABS composite material products.

[0033] Furthermore, the compatibilizer is a styrene-acrylonitrile-glycidyl methacrylate random copolymer.

[0034] Furthermore, the PC / ABS also includes an auxiliary agent.

[0035] The auxiliary agent may be an antioxidant added to improve the aging resistance of the PC / ABS composite material, or a lubricant introduced to improve the processability of the PC / ABS material, or a mixture of the antioxidant and the lubricant. The types and addition amounts of the antioxidant and the lubricant are well known to those skilled in the art, and the present invention will not be described in detail herein.

[0036] The second object of the present invention can be achieved by the following technical solutions:

[0037] A method for preparing a PC / ABS material with adjustable appearance color, comprising:

[0038] The first part of ABS resin, anti-wear agent and colorant are added into a mixer and pre-dispersed for 30-50 minutes at 120-130°C, and then extruded and granulated to obtain pre-dispersed granules;

[0039] The pre-dispersed pellets, the remaining ABS resin, PC resin and compatibilizer are added into a twin-screw extruder and melt-extruded to obtain PC / ABS material.

[0040] Furthermore, the first part of ABS resin accounts for 20-35% of the total ABS resin.

[0041] Furthermore, the extrusion temperature of the pre-dispersed pellets is 140-200°C.

[0042] Furthermore, the extrusion temperature of the melt extrusion is 230-250°C.

[0043] In the preparation method of PC / ABS material with adjustable appearance color, the present invention pre-extrudes and granulates the first part of ABS resin, wear-resistant agent and colorant, gives full play to the role of wear-resistant agent as colorant carrier, and at the same time, with the help of good fluidity of ABS resin, obtains pre-dispersed granules with good colorant dispersion, and then extrude and granulate the pre-dispersed granules and the remaining part of ABS resin, PC resin and compatibilizer together to obtain PC / ABS material with adjustable appearance color.

[0044] Beneficial effects of the present invention:

[0045] The invention provides a PC / ABS material with adjustable appearance color and a preparation method thereof. By adding a wear-resistant agent, not only the wear resistance of the PC / ABS material is improved, but also the dispersion performance of the colorant is improved, so that the appearance color of the obtained PC / ABS material product is more stable. DETAILED DESCRIPTION

[0046] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the present embodiment, the grafted calcium carbonate and the AB2 branched monomer are prepared in advance, and the specific operation is as follows:

[0048] 1. Preparation of grafted calcium carbonate:

[0049] 100g of nano calcium carbonate with a particle size of 100-300nm and 300mL of a mixed solvent are stirred at room temperature and 200-350r / min for 20-40min, heated to 80-90°C, 10-20g of a double bond siloxane coupling agent (specifically KH-570 in this embodiment) is added dropwise, the mixture is kept warm for 2-4h, cooled, centrifuged, the precipitate is taken, washed with water, washed with alcohol, and dried to obtain grafted calcium carbonate, wherein the mixed solvent is prepared by mixing deionized water and ethanol in a ratio of 1:4-8;

[0050] In a specific embodiment of the present invention, the particle size of nano calcium carbonate is 100-150 nm, the mixed solvent is composed of 50 mL of deionized water and 250 mL of ethanol, the heating temperature is 85° C., the stirring time is 30 min, and the insulation reaction is 3 h.

[0051] 2. Preparation of AB2 branched monomer:

[0052] i. In an ice water bath, under stirring, 0.1 mol phenyltrichlorosilane was slowly added dropwise to 200 mL of allyl chloride Grignard reagent (the concentration of allyl magnesium chloride was 2 M), stirred for 12-48 h, and then a saturated aqueous solution of ammonium chloride was added, filtered, and the filtrate was evaporated to recover tetrahydrofuran to obtain a ternary monomer;

[0053] ii. 0.1 mol 1,1,3,3-tetramethyldisiloxane, palladium catalyst, the ternary monomer prepared in step i and 100 mL tetrahydrofuran were mixed evenly, heated to 65° C. under stirring, stirred for reaction for 2 h, the reaction was stopped, the palladium catalyst was filtered and recovered, and the filtrate was rotary evaporated to obtain AB2 branched monomer. The palladium catalyst was a carbon-supported palladium catalyst with a loading rate of 10%.

[0054] Example 1

[0055] Preparation of wear-resistant agent:

[0056] 100g grafted calcium carbonate, 3g fatty alcohol polyoxyethylene ether, 58g first part methyl acrylate, 1g ammonium persulfate and 200g deionized water were stirred and mixed uniformly, and then stirred and reacted at 60°C for 2h. After heating to 70°C, a solution containing 2g ammonium persulfate, 26g second part methyl acrylate, 16g methyl propylene sulfonic acid and 100g deionized water was added dropwise. After the addition was completed, stirring and reacting for 5h was continued. Then, the temperature was raised to 85°C, and a mixed solution containing 15g AB2 branching monomer, 1.1g fatty alcohol polyoxyethylene ether and 70g deionized water was added dropwise. After the addition was complete, stirring and reacting for 1h was continued. Then, the temperature was raised to 90°C, and a mixed solution containing 4g palladium catalyst (carbon-supported palladium catalyst, loading rate 10%) and 20g deionized water was added dropwise. The branching reaction was stirred for 2h under heat preservation and stirring, and the reaction was stopped. The precipitate was taken by centrifugation, washed with water, washed with alcohol, and dried to obtain a wear-resistant agent.

[0057] Example 2

[0058] Preparation of wear-resistant agent:

[0059] 100g grafted calcium carbonate, 3g fatty alcohol polyoxyethylene ether, 65g first part methyl acrylate, 1.5g ammonium persulfate and 200g deionized water were stirred and mixed uniformly, and then stirred and reacted at 65°C for 1.5h. After heating to 80°C, a solution containing 3g ammonium persulfate, 30g second part methyl acrylate, 13g methyl propylene sulfonic acid and 100g deionized water was added dropwise. After the addition was completed, stirring and reacting for 4h was continued. Then, the temperature was raised to 90°C, and a mixed solution containing 25g AB2 branching monomer, 1.1g fatty alcohol polyoxyethylene ether and 70g deionized water was added dropwise. After the addition was complete, stirring and reacting for 0.5h was continued. Then, the temperature was raised to 100°C, and a mixed solution containing 2g palladium catalyst (carbon-supported palladium catalyst, loading rate 10%) and 20g deionized water was added dropwise. The branching reaction was stirred for 3h under heat preservation and stirring, and the reaction was stopped. The solution was centrifuged, the precipitate was taken, washed with water, washed with alcohol, and dried to obtain a wear-resistant agent.

[0060] Example 3

[0061] Preparation of PC / ABS materials:

[0062] i. Prepare the following raw materials in parts by weight: 35 parts of PC resin, 45 parts of ABS resin, 8 parts of the wear-resistant agent prepared in Example 1, 5 parts of colorant, 5 parts of compatibilizer, wherein the colorant is a mixture of iron oxide and cobalt black in a mass ratio of 2:1, and the compatibilizer is a random copolymer of styrene-acrylonitrile-glycidyl methacrylate;

[0063] ii. 20% of the total mass of ABS resin, wear agent and colorant are added to a mixer and pre-dispersed for 30 min at 120-130 ° C (exemplarily 125 ° C), followed by extrusion granulation to obtain pre-dispersed pellets, the extrusion temperature of the pre-dispersed pellets is 140-200 ° C;

[0064] iii. Add the pre-dispersed pellets, the remaining ABS resin, PC resin and compatibilizer into a twin-screw extruder, and melt extrude to obtain PC / ABS material at an extrusion temperature of 230-250°C.

[0065] Example 4

[0066] Preparation of PC / ABS materials:

[0067] i. Prepare the following raw materials in parts by weight: 40 parts of PC resin, 40 parts of ABS resin, 15 parts of the wear agent prepared in Example 2, 10 parts of colorant, 7 parts of compatibilizer, wherein the colorant is iron oxide, and the compatibilizer is styrene-acrylonitrile-glycidyl methacrylate random copolymer;

[0068] ii. 25% of the total mass of ABS resin, wear agent and colorant were added to a mixer and pre-dispersed for 40 min at 120-130 ° C, followed by extrusion granulation to obtain pre-dispersed pellets. The extrusion temperature of the pre-dispersed pellets was 140-200 ° C;

[0069] iii. Add the pre-dispersed pellets, the remaining ABS resin, PC resin and compatibilizer into a twin-screw extruder, and melt extrude to obtain PC / ABS material at an extrusion temperature of 230-250°C.

[0070] Example 5

[0071] Preparation of PC / ABS materials:

[0072] i. Prepare the following raw materials in parts by weight: 45 parts of PC resin, 35 parts of ABS resin, 20 parts of the wear agent prepared in Example 1, 15 parts of colorant, 10 parts of compatibilizer, wherein the colorant is titanium dioxide, and the compatibilizer is styrene-acrylonitrile-glycidyl methacrylate random copolymer;

[0073] ii. 35% of the total mass of ABS resin, wear agent and colorant were added to a mixer and pre-dispersed for 50 min at 120-130 ° C, followed by extrusion granulation to obtain pre-dispersed pellets. The extrusion temperature of the pre-dispersed pellets was 140-200 ° C;

[0074] iii. Add the pre-dispersed pellets, the remaining ABS resin, PC resin and compatibilizer into a twin-screw extruder, and melt extrude to obtain PC / ABS material at an extrusion temperature of 230-250°C.

[0075] Comparative Example 1

[0076] Preparation of PC / ABS material: Compared with Example 3, the wear-resistant agent was replaced with nano calcium carbonate in equal parts, and the rest was the same.

[0077] Comparative Example 2

[0078] Preparation of PC / ABS material: Compared with Example 3, the wear-resistant agent was deleted and the rest was the same.

[0079] Comparative Example 3

[0080] Preparation of PC / ABS material: Compared with Example 3, the wear-resistant agent was replaced with polyacrylate formed by emulsion polymerization prepared in the following steps, and the rest was the same:

[0081] 3g of fatty alcohol polyoxyethylene ether, 58g of the first part of methyl acrylate, 1g of ammonium persulfate and 200g of deionized water were stirred and mixed evenly, and then stirred and reacted at 60°C for 2h. After heating to 70°C, a solution containing 2g of ammonium persulfate, 26g of the second part of methyl acrylate, 16g of methyl propylene sulfonic acid and 100g of deionized water was added dropwise. After the addition was completed, the stirring reaction was continued for 5h, the reaction was stopped, centrifuged, the precipitate was taken, washed with water, washed with alcohol, and dried to obtain polyacrylate.

[0082] Example 6

[0083] The PC / ABS materials obtained in Examples 3-5 and Comparative Examples 1-3 were subjected to appearance color observation and physical property testing; the results of the physical property testing are shown in Table 2;

[0084] Among them, the appearance color observation is to observe the uniformity of the sample coloring, and the second is to observe the color difference between the comparative example sample and the example 3 sample. The observation results are shown in Table 1;

[0085] Wear test: PC / ABS material was extruded and molded into a sample of 6cm×2.5cm×1.5cm, and the original weight was recorded. Then, the wear test was carried out. After the test, the floating debris was brushed off with a brush, and the weight after wear was measured on a weighing scale. Among them, the wear test conditions were: the rotation speed of the grinding wheel (grinding disc) was 1000r / min, the test time was 5min, the surface particle size of the grinding wheel was 60#, and the load was 800g. Each sample was tested 3 times, and the average value was taken. The wear was calculated according to the following formula: wear = (original weight - weight after wear) / 5;

[0086] Table 1

[0087]

[0088] It can be seen from Table 1 that the appearance of the PC / ABS material obtained in Comparative Example 1-2 is the worst, the coloring is uneven, and there is a color difference between the sample in Example 3. The appearance of the PC / ABS material obtained in Comparative Example 3 is better than that of the PC / ABS material obtained in Comparative Example 1-2, but inferior to Comparative Example 3, and there is a color difference between the sample in Example 3, indicating that the wear-resistant agent introduced in the present invention has the effect of promoting the dispersion of the colorant.

[0089] Table 2

[0090] Tensile Strength Wear resistance Vertical burning level Test Standards GB / T 1040.2 / UL-94 unit Mpa g / min / Example 3 77.5 0.0081 V-1 Example 4 80.6 0.0077 V-1 Example 5 85.3 0.0069 V-0 Comparative Example 1 68.7 0.0099 V-1 Comparative Example 2 60.7 0.0251 V-2 Comparative Example 3 58.5 0.0209 V-2

[0091] It can be seen from the data in Table 2 that the tensile strength and wear resistance of the PC / ABS materials obtained in Examples 3-5 are better than those of the PC / ABS materials obtained in Comparative Examples 1-3, indicating that the introduction of the anti-wear agent of the present invention improves the tensile strength and wear resistance of the obtained PC / ABS material; the flame retardant property of the PC / ABS obtained in Example 3 is better than that of the PC / ABS materials obtained in Comparative Examples 2-3, and is the same as the flame retardant property of the PC / ABS material obtained in Comparative Example 1, indicating that the improvement of the flame retardant property of the present invention mainly depends on the nano calcium carbonate core in the anti-wear agent.

[0092] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0093] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A PC / ABS material with adjustable appearance color, characterized in that: The raw materials include the following parts by weight: 35-45 parts of PC resin, 35-45 parts of ABS resin, 8-20 parts of wear-resistant agent, 5-15 parts of colorant, and 5-10 parts of compatibilizer; The wear-resistant agent comprises a core formed by nano calcium carbonate and a modified polyacrylate coated on the outer layer of the nano calcium carbonate core; The anti-wear agent is prepared by the following steps: The grafted calcium carbonate, the first emulsifier, the first part of methyl acrylate, the first initiator and deionized water are stirred and mixed uniformly, and then stirred and reacted at 60-65°C for 1.5-2h. After heating to 70-80°C, a solution containing the second initiator, the second part of methyl acrylate, the sulfonic acid monomer and deionized water is added dropwise. After the addition is completed, the stirring reaction is continued for 4-6h. Then, the temperature is raised to 80-90°C, and a solution containing the AB2 branching monomer, the second emulsifier and deionized water is added dropwise. After the addition is complete, the stirring reaction is continued for 0.5-1h. Then, the temperature is raised to 90-100°C, and a solution containing the palladium catalyst and deionized water is added dropwise. The branching reaction is stirred for 2-4h under heat preservation and stirring, and the reaction is stopped, centrifuged, and the precipitate is taken, washed with water, washed with alcohol, and dried to obtain a wear-resistant agent; The sulfonic acid monomer is one or more of ethylene sulfonic acid, propylene sulfonic acid, methyl propylene sulfonic acid, styrene sulfonic acid, and 2-acrylamide-2-methylpropane sulfonic acid; The AB2 branched monomer is prepared by a ternary monomer prepared by the reaction of an allyl chloride Grignard reagent and phenyltrichlorosilane and a hydrosilylation reaction of 1,1,3,3-tetramethyldisiloxane under the action of a palladium catalyst; The mass ratio of the grafted calcium carbonate, methyl acrylate and sulfonic acid monomer to the mass ratio of the AB2 branched monomer is 10:7-11:1-2.5; The molar ratio of the methyl acrylate to the sulfonic acid monomer is 1:0.1-0.

3.

2. The PC / ABS material with adjustable appearance color according to claim 1, characterized in that: The total mass of the first initiator and the second initiator is 2.5-4.5% of the total mass of methyl acrylate and sulfonic acid monomer; the mass ratio of the first initiator to the second initiator is 1-1.5:

2.

3. The PC / ABS material with adjustable appearance color according to claim 1, characterized in that: The mass ratio of the first part of methyl acrylate to the second part of methyl acrylate is 2-2.5:

1.

4. The PC / ABS material with adjustable appearance color according to claim 1, characterized in that: The grafted calcium carbonate is prepared by surface modification reaction of nano calcium carbonate with a double bond siloxane coupling agent; the particle size of the nano calcium carbonate is 100-300nm, and the mass ratio of the nano calcium carbonate to the double bond siloxane coupling agent is 1:0.1-0.

2.

5. The PC / ABS material with adjustable appearance color according to claim 1, characterized in that: The colorant is one or more inorganic pigments; the PC / ABS also includes an auxiliary agent, which is an antioxidant and / or a lubricant.

6. The method for preparing a PC / ABS material with adjustable appearance color according to claim 1, characterized in that: include: The first part of ABS resin, anti-wear agent and colorant are added into a mixer and pre-dispersed at 120-130° C., and then extruded and granulated to obtain pre-dispersed granules; The pre-dispersed pellets, the remaining ABS resin, PC resin and compatibilizer are added into a twin-screw extruder and melt-extruded to obtain PC / ABS material.

7. The method for preparing a PC / ABS material with adjustable appearance color according to claim 6, characterized in that: The first part of ABS resin accounts for 20-35% of the total ABS resin; the extrusion temperature of the pre-dispersed pellets is 140-200°C; The extrusion temperature of the melt extrusion is 230-250°C.

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