A high wear-resistant and low-emission PC / ABS alloy material and its preparation method

Abstract

This invention relates to the field of polymer materials technology, and particularly to a high-wear-resistant, low-emission PC / ABS alloy material and its preparation method. This high-wear-resistant, low-emission PC / ABS alloy material, by weight, comprises the following components: PC matrix resin, ABS matrix resin, adsorbent masterbatch, and wear-resistant agent; the weight ratio of the PC matrix resin, the ABS matrix resin, the adsorbent masterbatch, and the wear-resistant agent is (40-70):(25-45):(5-10):(0.5-2); wherein the wear-resistant agent is MAH (UHMWPE-g-SEBS); the adsorbent masterbatch is an adsorbent masterbatch using AS carrier resin as a carrier, and the adsorbent mass content is 45-55%; the adsorbent is a porous mineral adsorbent. This PC / ABS alloy material combines low odor, low VOC, high wear resistance, and good mechanical properties, making it more aesthetically pleasing, healthier, and more environmentally friendly, possessing good market competitiveness and prospects.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a high wear-resistant, low-emission PC / ABS alloy material and its preparation method. Background Technology

[0002] PC / ABS is a blend of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS), combining the excellent properties of both materials: the easy molding of ABS and the superior mechanical properties of PC. Compared to PC, PC / ABS offers improved flowability, better processing performance, and increased stress cracking resistance. It also boasts better heat resistance than ABS, with a cost between the two. It can be widely used in automotive interior parts, electronic communication equipment, home appliances, and lighting equipment.

[0003] ABS resin contains numerous small-molecule impurities during manufacturing, resulting in an unpleasant odor and high total carbon emissions (TVOC). Furthermore, various additives are often added during the preparation of PC / ABS, which frequently emit unpleasant odors to varying degrees. This unpleasant odor is particularly concerning in the automotive interior sector, drawing increasing attention from consumers. To better regulate air quality inside new vehicles, my country issued and implemented the "Guidelines for Air Quality Assessment in Passenger Cars" on March 1, 2012. This requires material manufacturers to provide products with lower odor and lower VOCs (volatile organic compounds) to meet consumer demand.

[0004] In practical applications, PC / ABS alloy materials often exhibit low surface gloss and poor wear resistance. As the market develops, consumers demand aesthetic appeal and enhanced wear resistance from products. Therefore, PC / ABS alloy materials typically require secondary processing, such as electroplating and painting, to meet these requirements. However, secondary processing not only increases costs but also causes environmental pollution and may exacerbate the emission of unpleasant odors and volatile organic compounds from the alloy material.

[0005] In summary, developing a PC / ABS alloy material with low odor, low VOC, high wear resistance, and while maintaining the good mechanical properties inherent in PC / ABS itself is precisely the technical challenge that this field is committed to solving. Summary of the Invention

[0006] To address the problems mentioned in the background section regarding the unpleasant odor, high VOC levels, and poor wear resistance of existing PC / ABS alloy materials, this invention provides a highly wear-resistant, low-emission PC / ABS alloy material, the technical solution of which is as follows:

[0007] This high-wear-resistant, low-emission PC / ABS alloy material comprises, by weight, the following components: PC matrix resin, ABS matrix resin, adsorbent masterbatch, and wear-resistant agent; the weight ratio of the PC matrix resin, the ABS matrix resin, the adsorbent masterbatch, and the wear-resistant agent is (40-70):(25-45):(5-10):(0.5-2); wherein the wear-resistant agent is MAH (UHMWPE-g-SEBS); the adsorbent masterbatch is an adsorbent masterbatch with AS carrier resin as the carrier and an adsorbent mass content of 45-55%; the adsorbent is a porous mineral adsorbent.

[0008] In some embodiments, the adsorbent masterbatch comprises the AS carrier resin and the adsorbent, wherein the mass ratio of the AS carrier resin to the adsorbent is (45-55):(45-55), preferably 50:50; the mineral adsorbent comprises attapulgite and diatomaceous earth, wherein the weight ratio of the attapulgite to the diatomaceous earth is (40-70):(30-60), optionally 70:30, preferably 40:60, more preferably 50:50, for example, using LSA1-1 from LN mineral resources.

[0009] In some embodiments, the preparation process of the adsorbent masterbatch is as follows: the AS carrier resin and the adsorbent are weighed according to a certain weight and mixed to form a mixture N. The mixture N is fed into a twin-screw extruder and melt-extruded, and then granulated to obtain the adsorbent masterbatch; wherein, the melt extrusion temperature of the twin-screw extruder is 200-220°C.

[0010] In some embodiments, the preparation process of the wear-resistant agent is as follows:

[0011] UHMWPE, SEBS, maleic anhydride monomer, styrene monomer, and auxiliary agents are mixed evenly and then added to a twin-screw extruder. After reactive extrusion granulation, MAH (UHMWPE-g-SEBS) is obtained. The auxiliary agents include one or more combinations of initiators, diluents, crosslinking inhibitors, and flow modifiers. For example, BSMC's MX711 is used.

[0012] In some embodiments, the attapulgite is attapulgite modified with a surfactant; wherein the surfactant may be one or more of the following: silane coupling agent, titanate coupling agent, zirconate coupling agent, and aluminate coupling agent.

[0013] In some embodiments, the surfactant is a silane coupling agent containing an epoxy functional group.

[0014] In some embodiments, the PC matrix resin has a weight-average molecular weight of 17,000–30,000 g / mol and a glass transition temperature of 145–150 °C; the ABS matrix resin has a weight-average molecular weight of 80,000–150,000 g / mol, wherein the mass content of butadiene is 5–30%, the mass content of acrylonitrile is 10–30%, and the mass content of styrene is 40–70%.

[0015] In some embodiments, the components further include antioxidants and lubricants; by weight, the components include: 40-70 parts of the PC matrix resin, 25-45 parts of the ABS matrix resin, 5-10 parts of the adsorbent masterbatch, 0.5-2 parts of the wear-resistant agent, 0.1-1 parts of the antioxidant, and 0.1-2 parts of the lubricant.

[0016] In some embodiments, the antioxidant is one or more combinations of phosphite antioxidant 168, phosphite antioxidant S-9228, hindered phenolic antioxidant 1010, and hindered phenolic antioxidant 1076; the lubricant is one or more combinations of pentaerythritol stearate, polyethylene wax, fluorinated processing aids, and organosiloxanes.

[0017] The present invention also provides a method for preparing the high wear-resistant and low emission PC / ABS alloy material as described above, which includes the following steps:

[0018] Weigh the raw material components according to the formula, and mix the raw material components evenly to obtain mixture M;

[0019] The mixture M is added to a twin-screw extruder, and after melt extrusion and granulation in the twin-screw extruder, the PC / ABS alloy material is obtained; wherein the screw speed of the twin-screw extruder is 200-500 rpm, and the melt extrusion temperature is 220℃-270℃.

[0020] Compared with existing technologies, the high wear-resistant and low-emission PC / ABS alloy material provided by this invention has the following technical advantages:

[0021] The PC / ABS alloy material provided by this invention, through specific formulation design, reduces the emission of odor and volatile organic compounds, exhibiting advantages of low odor and low VOC. While reducing its emission, it maintains good mechanical properties, improves impact resistance, and significantly enhances wear resistance. This PC / ABS alloy material combines low odor, low VOC, high wear resistance, and good mechanical properties, making it more aesthetically pleasing, healthier, and more environmentally friendly, thus possessing good market competitiveness and prospects.

[0022] Other features and beneficial effects of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects of the invention and other beneficial effects may be realized and obtained by means of the structures particularly pointed out in the description and claims. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention provides a method for preparing a high-wear-resistant, low-emission PC / ABS alloy material, which includes the following steps:

[0025] (1) Weigh out PC matrix resin, ABS matrix resin, adsorbent masterbatch, wear-resistant agent, antioxidant, and lubricant according to a certain weight and put them into a mixer and stir for 5 min to 15 min. After mixing evenly, a mixture M is obtained.

[0026] (2) The mixture M obtained in step (1) is added to a twin-screw extruder, and the PC / ABS alloy material is obtained after melt extrusion and granulation in the twin-screw extruder; wherein the screw speed of the twin-screw extruder is 200 to 500 rpm and the melt extrusion temperature is 220°C to 270°C.

[0027] The formulation of the PC / ABS alloy material is as follows: by weight, the components include 40-70 parts of PC matrix resin, 25-45 parts of ABS matrix resin, 5-10 parts of adsorbent masterbatch, 0.5-2 parts of wear-resistant agent, 0.1-1 parts of antioxidant, and 0.1-2 parts of lubricant.

[0028] The melt extrusion temperature is 220℃~270℃. During the extrusion process, the twin-screw extruder adopts a dual vacuum setting, with one vacuum located at the fiber feeding port (i.e., the feeding port) and the other located in the metering section.

[0029] The wear-resistant agent is MAH (UHMWPE-g-SEBS); the adsorbent masterbatch is an adsorbent masterbatch with AS carrier resin as the carrier and an adsorbent mass content of 45-55%, which is composed of 45-55 wt% AS carrier resin and 45-55 wt% adsorbent; the adsorbent is a porous mineral adsorbent, which is composed of attapulgite and diatomaceous earth, wherein the attapulgite is preferably attapulgite modified with surfactant, and the mass ratio of attapulgite to diatomaceous earth is (40-70):(30-60), optionally 70:30, preferably 40:60, and more preferably 50:50.

[0030] The surfactant may be one or more of the following: silane coupling agents, titanate coupling agents, zirconate coupling agents, and aluminate coupling agents. Silane coupling agents are preferred, and silane coupling agents containing epoxy functional groups are more preferred for surface treatment, such as LN mineral resources' LSA1-1.

[0031] This invention also provides a method for preparing raw material component adsorbent masterbatch, specifically:

[0032] 1) Weigh the AS carrier resin and the adsorbent according to a certain weight;

[0033] 2) Dry mix the AS carrier resin and adsorbent in a high-speed mixer for 3-5 minutes to form mixture N.

[0034] 3) The mixture N is fed into a twin-screw extruder and melt-extruded, and then granulated to obtain the adsorbent masterbatch; wherein the melt extrusion temperature of the twin-screw extruder is 200-220℃.

[0035] This invention also provides a method for preparing the raw material component MAH (UHMWPE-g-SEBS), specifically as follows:

[0036] After UHMWPE, SEBS, maleic anhydride monomer, styrene monomer, and auxiliary agents are mixed evenly, the mixture is added to a twin-screw extruder and granulated by reactive extrusion to obtain MAH(UHMWPE-g-SEBS). The auxiliary agents include, but are not limited to, one or more combinations of initiators, diluents, crosslinking inhibitors, and flow modifiers.

[0037] The present invention also provides formulations (unit: parts by weight) for the embodiments and comparative examples shown in Table 1:

[0038] Table 1

[0039]

[0040] In Table 1, the raw material components were selected as follows: PC was selected from Teijin's L-1250Y, ABS was selected from Takahashi Petrochemical's ABS8391, antioxidants were composed of Ciba's antioxidants 1076 and 168 in a weight ratio of 1:1, lubricant was commercially available pentaerythritol stearate (PETS), and wear-resistant agent in Comparative Example 4 was commercially available polytetrafluoroethylene (PTFE).

[0041] In the examples and comparative examples, the wear-resistant agent MAH (UHMWPE-g-SEBS) used was selected from BSMC's MX711.

[0042] The specific preparation method of the adsorbent masterbatch used in the examples and comparative examples is as follows:

[0043] 1) Weigh the AS carrier resin and the adsorbent according to a certain weight;

[0044] The adsorbent masterbatch consists of AS carrier resin and adsorbent. Based on the total raw material weight of the adsorbent masterbatch, AS carrier resin accounts for 55 wt% and adsorbent accounts for 45 wt%. The adsorbent is composed of attapulgite and diatomaceous earth in a weight ratio of 50:50. The attapulgite is attapulgite modified with epoxy surfactant, specifically LNmineral Resources' LSA1-1. The AS carrier resin is selected from CHEMEI SAN PN-118L150.

[0045] 2) Dry mix the AS carrier resin and adsorbent in a high-speed mixer for 4 minutes to form mixture N.

[0046] 3) The mixture N is fed into a twin-screw extruder and melt-extruded, and then granulated to obtain the adsorbent masterbatch; wherein the melt extrusion temperature of the twin-screw extruder is 200-220℃.

[0047] According to the formulation in Table 1, the raw material components in the examples and comparative examples were prepared into PC / ABS alloy materials using the following preparation method: The preparation steps are as follows:

[0048] (1) Weigh out PC matrix resin, ABS matrix resin, adsorbent masterbatch, wear-resistant agent, antioxidant, and lubricant according to a certain weight and put them into a mixer and stir for 10 minutes. After mixing evenly, a mixture M is obtained.

[0049] (2) The mixture M obtained in step (1) is added to a twin-screw extruder, and the PC / ABS alloy material is obtained after melt extrusion and granulation in the twin-screw extruder;

[0050] The twin-screw extruder has a screw speed of 400 rpm and a melt extrusion temperature of 220℃~270℃. During the extrusion process, the twin-screw extruder adopts a dual vacuum setting, with one vacuum located at the fiber feeding port (i.e., the feeding port) and the other located in the metering section.

[0051] It should be noted that the raw material components of the adsorbent masterbatch in Comparative Example 7, namely attapulgite, diatomaceous earth and AS carrier resin, are not pre-made into masterbatch, but are directly added in step (2).

[0052] The PC / ABS alloy materials obtained in the examples and comparative examples were tested for relevant performance indicators under the same test conditions. The test results are shown in Table 2 below:

[0053] Table 2

[0054]

[0055]

[0056] The testing standards for each item are as follows:

[0057] Tensile strength was tested according to ISO 527-2:2012 standard;

[0058] Bending strength and bending modulus were tested according to ISO 178:2019 standard;

[0059] The impact test of the notched beam was performed according to ISO 179-1:2010 standard;

[0060] Scratch resistance was tested according to PV3952:2002 standard using a German Elysion 430P-I scratch tester with a load of 10N and a scratch head diameter of 1mm. The scratch test was performed on the sample surface, with 20 scratches each longitudinally and transversely spaced 2mm apart. The color difference meter was used to test the color change ΔL value of the material before and after the scratch. The smaller the ΔL value, the better the scratch resistance.

[0061] Abrasion resistance is tested according to ASTM D4060-19 standard using a Tiber abrasion tester. The smaller the wear mass L, the better the abrasion resistance.

[0062] TVOC is tested according to VDA277:1995 standard. The higher the TVOC value, the greater the total carbon volatilization of the material and the worse the emission characteristics, and vice versa.

[0063] Odor rating is tested according to VDA270:2022 standard, using a rating scale of 1-6. The higher the rating, the stronger the odor.

[0064] Analyzing the data from the comparative examples and the embodiment examples, it can be seen that:

[0065] (1) As can be seen from Examples 1-4, 7-9 and Comparative Examples 1 and 3: the addition of adsorbent masterbatch does not significantly change the tensile strength, flexural strength and flexural modulus of the material, but the TVOC and odor level are significantly reduced. The more adsorbent masterbatch is added within 5-10 wt% of the total mass, the lower the TVOC and odor level, that is, the less PC / ABS is emitted.

[0066] (2) As can be seen from Examples 1-9 and Comparative Examples 1-2, the tensile strength, flexural strength and flexural modulus of the material do not change much when the wear-resistant agent is added. However, the impact strength of the simply supported beam increases with the increase of the amount of wear-resistant agent added, indicating that the modified wear-resistant agent can increase the compatibility of the substrate.

[0067] Furthermore, as the amount of wear-resistant agent added increases, the scratch resistance ΔL and wear mass decrease, but at an addition amount of 1.5 wt%, the performance changes tend to stabilize with further increases in the amount of wear-resistant agent added. In summary, it can be seen that adding the wear-resistant agent of this application not only helps improve the wear resistance of the material, but also, due to its enhanced compatibility with the substrate, also has a certain effect on improving the impact strength.

[0068] (3) The comparison results between Comparative Example 4 and Example 8 show that: Comparative Example 4 uses ordinary wear-resistant agent PTFE to replace MAH (UHMWPE-g-SEBS) in Example 8. Compared with Comparative Example 2 without wear-resistant agent, the scratch resistance and wear resistance of the PC / ABS alloy material prepared in Comparative Example 4 are not significantly different from those without wear-resistant agent, only slightly improved. However, compared with Example 8, the wear resistance and scratch resistance of Comparative Example 4 are significantly reduced, and the TVOC value and odor are also significantly increased. It can be seen that the present application uses a specific MAH (UHMWPE-g-SEBS) to achieve better scratch resistance and wear resistance.

[0069] (4) The comparison results of Comparative Examples 5, 6 and Examples 7-9 show that the amount of wear-resistant agent added in Comparative Examples 5 and 6 is higher and lower than the limit of this application, respectively. Compared with Example 8, the scratch resistance and wear resistance of the PC / ABS alloy material prepared in Comparative Example 5 are almost the same as those in Example 8. It can be seen that when the wear-resistant agent exceeds the limit of this application, the effect does not improve with the increase of wear-resistant agent content, and the increase of wear-resistant agent addition obviously increases the manufacturing cost.

[0070] Compared to Comparative Example 2 without added abrasion-resistant agent, the results of scratch resistance and abrasion resistance of the PC / ABS alloy material prepared in Comparative Example 6 are not significantly different. However, compared to Examples 7-9, the scratch resistance of Comparative Example 6 is significantly reduced. It can be seen that the present application uses a specific MAH (UHMWPE-g-SEBS) ratio, which can achieve scratch resistance and abrasion resistance.

[0071] (4) The comparison results between Comparative Example 7 and Example 7 show that: Comparative Example 7 did not pre-prepare adsorbent masterbatch, but directly added adsorbent masterbatch raw materials. Compared with Comparative Example 3, which did not add adsorbent masterbatch, the TVOC and odor levels of the PC / ABS alloy material obtained in Comparative Example 7 were not significantly different, but compared with Example 7, its TVOC and odor levels were significantly increased. It can be seen that the pre-prepared adsorbent masterbatch used in this application has the effect of reducing TVOC and odor levels.

[0072] In summary, the method of the present invention is simple and easy to implement. Adding self-made adsorbent masterbatch and abrasion resistant agent to PC / ABS can not only improve the notched impact strength of PC / ABS, but also significantly improve the abrasion resistance and reduce its emissions, giving it the advantages of low odor and low VOC.

[0073] In summary, the method for preparing conductive polymer materials by mixing and reduction provided by this invention has at least the following inventive concept, mechanism of action, and technical effects:

[0074] (1) This application uses porous mineral adsorbent and AS carrier resin to pre-prepare adsorbent masterbatch:

[0075] The nanolattice of attapulgite can adsorb toxic and harmful nano-sized polar substances such as formaldehyde, benzene, and ammonia in the air, while diatomaceous earth can not only adsorb micron-sized macromolecular air impurities, but also provide adsorption channels for mineral adsorbents, thereby improving the adsorption effect of mineral adsorbents.

[0076] However, attapulgite is a magnesium silicate clay mineral with the ideal structural formula Mg5(H2O)4[Si4O 10 Attapulgite (OH)₂ has a crystal structure that is a transitional type between the double-chain and layered structures of silicates. Due to its unique layered structure, it exhibits excellent adsorption and ion exchange properties. However, attapulgite itself has a large specific surface area and high surface activity, making it prone to aggregation. Furthermore, its surface contains a large number of silanol groups. Therefore, unmodified attapulgite remains a hydrophilic adsorbent, and organic modification is necessary to improve its affinity for organic matter. Thus, attapulgite modified with an epoxy surfactant is preferred.

[0077] The advantages of the selected diatomaceous earth are: it can significantly enhance the rigidity and strength of the product, with a settling volume of up to 95%, and can improve the product's heat resistance, wear resistance, and anti-aging properties. Diatomaceous earth is widely available and inexpensive, and has the characteristics of large specific surface area and porous structure. It not only plays the role of reinforcing filler material, but also reduces the amount of resin used and lowers costs because its porous structure adsorbs small molecules present in the resin.

[0078] This application utilizes attapulgite and diatomaceous earth modified with epoxy surfactants to achieve good adsorption effect, reduce the emission of volatile organic compounds and unpleasant odors, and pre-preparing attapulgite, diatomaceous earth and AS carrier resin into masterbatch can effectively improve the compatibility between the adsorbent and the matrix, and make attapulgite and diatomaceous earth uniformly dispersed in the matrix.

[0079] (2) This application uses the wear-resistant agent MAH (UHMWPE-g-SEBS):

[0080] UHMWPE possesses good wear resistance, low-temperature resistance, impact resistance, corrosion resistance, good chemical stability, and self-lubricating properties. However, as a non-polar polymer with low surface activity, UHMWPE exhibits weak interfacial bonding and poor compatibility with other polymers, limiting its application in blends. This application addresses this by grafting UHMWPE with a specific MAH (UHMWPE-g-SEBS) as a wear-resistant agent. This grafting modification significantly improves the interfacial bonding and compatibility of UHMWPE with other polymers.

[0081] (3) This application also preferably adds a lubricant:

[0082] Lubricants are used to improve the flowability and release properties of plastics during processing, reduce torque, reduce equipment friction, facilitate die punching, reduce product defect rates, eliminate plastic melt fracture, reduce die head buildup, and significantly improve the impact strength of plastics.

[0083] It should be noted that:

[0084] The term "PC" as used in this article is a common abbreviation in the field for polymer materials, specifically polycarbonate.

[0085] The term "ABS" as used in this article is a general abbreviation in the field for polymer materials, specifically acrylonitrile-butadiene-styrene copolymer, which is a terpolymer composed of acrylonitrile, butadiene, and styrene. Its English name is acrylonitrile–butadiene–styrene copolymer, abbreviated as ABS.

[0086] The term "UHMWPE" as used in this article is a common abbreviation in the field for ultra-high molecular weight polyethylene, and its English name is ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE.

[0087] The “SEBS” mentioned in this article refers to a linear triblock copolymer with polystyrene as the end segment and ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block. Its full English name is Styrene Ethylene Butylene Styrene, abbreviated as SEBS.

[0088] The term "MAH" as used in this article is the common abbreviation for maleic anhydride.

[0089] The "AS resin" mentioned in this article is scientifically known as acrylonitrile-styrene copolymer.

[0090] In addition to the actual selections shown in the specific embodiments above, the mass ratio of PC matrix resin, ABS matrix resin, adsorbent masterbatch and wear-resistant agent can be in the range of (40-70):(25-45):(5-10):(0.5-2), including but not limited to the actual selections shown in the embodiments above;

[0091] In addition to the actual selections shown in the specific embodiments above, preferably, the weight-average molecular weight of the selected PC matrix resin is in the range of 17,000 to 30,000 g / mol, and its glass transition temperature is in the range of 145 to 150°C, including but not limited to the actual selections shown in the embodiments above.

[0092] The PC matrix resin may be selected from one or more aromatic polycarbonates synthesized by melt transesterification, interfacial phosgene method, or non-phosgene melt transesterification method; preferably aromatic polycarbonates synthesized by interfacial phosgene method, such as commercially available Teijin L-1250Y, L-1225Y, and L-1225L, Wanhua CLARNATE A1100 and A1200, etc. The PC matrix resin used in the specific implementation of this application includes, but is not limited to, the above-mentioned PC matrix resin models.

[0093] In addition to the actual selections shown in the specific embodiments above, preferably, the weight-average molecular weight of the selected ABS matrix resin is between 80,000 and 150,000 g / mol, wherein the mass content of butadiene is between 5 and 30%, the mass content of acrylonitrile is between 10 and 30%, and the mass content of styrene is between 40 and 70%. The performance parameters of the ABS are all feasible within the above ranges, including but not limited to the actual selections shown in the embodiments above.

[0094] The ABS matrix resin can be an ABS resin made by emulsion polymerization, solution bulk polymerization or suspension polymerization, but includes, but is not limited to, one or more of them; ABS resin made by solution bulk polymerization is preferred; such as 8391 from Shanghai Gaoqiao, GP-22 from INEOS, Germany, etc. The ABS matrix resin used in the specific implementation of this application includes, but is not limited to, the above-mentioned ABS matrix resin models.

[0095] In addition to the actual selections shown in the specific embodiments above, preferably, the antioxidant can be one or more combinations of phosphite antioxidant 168, phosphite antioxidant S-9228, hindered phenolic antioxidant 1010, and hindered phenolic antioxidant 1076, including but not limited to the actual selections shown in the embodiments above.

[0096] In addition to the actual choices shown in the specific embodiments above, preferably, the lubricant can be one or more combinations of pentaerythritol stearate, polyethylene wax, fluorinated processing aids, and organosiloxanes, including but not limited to the actual choices shown in the embodiments above;

[0097] In summary, the specific parameters or some commonly used reagents or raw materials in the above embodiments are specific or preferred embodiments under the concept of the present invention, and not limitations thereof; those skilled in the art can make adaptive adjustments within the concept and protection scope of the present invention.

[0098] In addition, unless otherwise specified, the raw materials used may be commercially available products in the field or prepared by conventional methods in the field; that is, the reagents and instruments used in this embodiment do not specify the manufacturer or other information, and are all conventional products that can be purchased from the market.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high wear resistant low emission PC / ABS alloy material, characterized in that, By weight, it comprises the following components: PC matrix resin, ABS matrix resin, adsorbent masterbatch, and abrasion resistant agent; The weight ratio of the PC matrix resin, the ABS matrix resin, the adsorbent masterbatch, and the wear-resistant agent is (40-70):(25-45):(5-10):(0.5-2). The wear-resistant agent is MAH (UHMWPE-g-SEBS); the adsorbent masterbatch includes AS carrier resin and adsorbent, wherein the mass ratio of AS carrier resin to adsorbent is 45:55; the adsorbent is a mineral adsorbent, which is composed of attapulgite and diatomaceous earth in a mass ratio of (40-70):(30-60). The preparation process of the adsorbent masterbatch is as follows: the AS carrier resin and the adsorbent are mixed to form a mixture N, and then the mixture N is fed into a twin-screw extruder for melt extrusion and granulation to obtain the adsorbent masterbatch; wherein, the melt extrusion temperature of the twin-screw extruder is 200-220℃; The preparation process of the wear-resistant agent is as follows: UHMWPE, SEBS, maleic anhydride monomer, styrene monomer and auxiliary additives are mixed evenly and then added to a twin-screw extruder. After reactive extrusion granulation, MAH (UHMWPE-g-SEBS) is obtained; wherein, the auxiliary additives include one or more combinations of initiators, diluents, crosslinking inhibitors and flow modifiers.

2. The high wear-resistant, low-emission PC / ABS alloy material according to claim 1, characterized in that: The attapulgite clay is attapulgite clay modified with surfactant; The surfactant includes one or more of the following: silane coupling agents, titanate coupling agents, zirconate coupling agents, and aluminate coupling agents.

3. The high wear-resistant, low-emission PC / ABS alloy material according to claim 2, characterized in that: The surfactant is a silane coupling agent containing epoxy functional groups.

4. The high wear-resistant, low-emission PC / ABS alloy material according to claim 1, characterized in that: The PC matrix resin has a weight-average molecular weight of 17,000 to 30,000 g / mol and a glass transition temperature of 145 to 150 °C. The ABS matrix resin has a weight-average molecular weight of 80,000 to 150,000 g / mol, wherein the mass content of butadiene is 5 to 30%, the mass content of acrylonitrile is 10 to 30%, and the mass content of styrene is 40 to 70%.

5. The high wear-resistant, low-emission PC / ABS alloy material according to claim 1, characterized in that: Its components also include antioxidants and lubricants; By weight, its components include: 40-70 parts of PC matrix resin, 25-45 parts of ABS matrix resin, 5-10 parts of adsorbent masterbatch, 0.5-2 parts of wear-resistant agent, 0.1-1 parts of antioxidant, and 0.1-2 parts of lubricant.

6. The high wear-resistant, low-emission PC / ABS alloy material according to claim 5, characterized in that: The antioxidant is one or more of the following: phosphite antioxidant 168, phosphite antioxidant S-9228, hindered phenolic antioxidant 1010, and hindered phenolic antioxidant 1076. The lubricant is one or more combinations of pentaerythritol stearate, polyethylene wax, fluorinated processing aids, and organosiloxanes.

7. A method for preparing a high-wear-resistant, low-emission PC / ABS alloy material as described in any one of claims 1-6, characterized in that, Includes the following steps: Weigh the raw material components according to the formula, and mix the raw material components evenly to obtain mixture M; The mixture M is added to a twin-screw extruder, and after melt extrusion and granulation in the twin-screw extruder, the PC / ABS alloy material is obtained; wherein the screw speed of the twin-screw extruder is 200-500 rpm, and the melt extrusion temperature is 220℃-270℃.

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