ITE-containing case ABS shell material and preparation method thereof

Abstract

The invention relates to the field of ABS environment-friendly new materials, and particularly discloses an ITE-containing case ABS shell material and a preparation method thereof. The ITE case ABS shell material is prepared from the following components: ITE, epoxy acrylate resin, 2, 2 '-(1, 3-phenylene)-dioxazoline, dodecyl mercaptan, a flame retardant, a compatilizer, a toughening agent, an anti-dripping agent and silicone powder. The ITE is selected from a waste ABS recycled material. According to the case ABS shell material, waste ABS recycled materials, namely ITE, are reused for producing the case ABS shell, the mechanical property is good, resources are saved, the environment is protected, circular economy is developed, and the cost is reduced. The preparation method comprises the following steps: mixing, smelting, extruding and granulating, so that the reaction between the ITE and other materials is more sufficient and uniform.

Description

Technical Field

[0001] The present application relates to the technical field of ABS environmentally friendly new materials, and more specifically, to an ABS shell material for a chassis containing ITE and a preparation method thereof. Background Art

[0002] In recent years, due to the rapid development of the electronic equipment industry, electronic equipment waste is growing at a rate of nearly 20% per year, becoming the fastest growing garbage in the world. Therefore, there is a large amount of electronic equipment waste that can be recycled, and the recycled materials of these electronic equipment are called ITE.

[0003] With the increasing awareness of environmental protection, countries are vigorously promoting energy conservation and carbon reduction, developing a circular economy, and realizing resource conservation and an environmentally friendly economy. Therefore, how to better utilize ITE has become an urgent problem to be solved. In order to meet market demand, people hope to reuse ITE in the production of electronic equipment parts.

[0004] Since electronic equipment waste includes a large amount of plastics, and ABS, or poly (acrylonitrile-butadiene-styrene) copolymer, is one of the plastics with a relatively large proportion, ITE includes a large amount of waste ABS recycled materials. ABS has excellent mechanical properties, good thermal stability, chemical resistance and processing properties, and is suitable for the production of chassis shells. However, due to the oxidation and breakage of the molecular chain of waste ABS recycled materials, the molecular weight is reduced, and the molecular weight distribution becomes wider, the mechanical properties of waste ABS recycled materials are significantly reduced, and they cannot meet the standards for the production of chassis ABS shells. Summary of the invention

[0005] In order to meet market demand, make better use of ITE to produce chassis ABS shell with good mechanical performance, and at the same time save resources and protect the environment, the present application provides a chassis ABS shell material containing ITE and a preparation method thereof.

[0006] The present application provides an ABS shell material for a chassis containing ITE and a preparation method thereof, which adopts the following technical solutions: In the first aspect, the present application provides an ABS shell material for a chassis containing ITE, which adopts the following technical solutions: A chassis ABS shell material containing ITE comprises the following components by weight: 94-108 parts of ITE, 10-22 parts of epoxy acrylate resin, 5-7 parts of 2,2′-(1,3-phenylene)-bisoxazoline, 0.1-0.3 parts of dodecyl mercaptan, 17-33 parts of flame retardant, 0.8-2 parts of compatibilizer, 6-12 parts of toughening agent, 0.1-0.5 parts of anti-dripping agent and 1-11 parts of silicone powder; the ITE is made of waste ABS recycled material.

[0007] By adopting the above technical solution, ITE uses waste ABS recycled materials. Although the molecular chains of waste ABS recycled materials are oxidized and broken, the molecular weight is reduced, the molecular weight distribution is broadened, and the mechanical properties of waste ABS recycled materials are significantly reduced, which cannot meet the standards for producing chassis ABS shells, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan can jointly repair the oxidized and broken molecular chains and reconstruct the cross-linked network structure, thereby improving the mechanical properties of waste ABS recycled materials. ABS, that is, poly (acrylonitrile-butadiene-styrene) copolymer, contains a butadiene phase, in which the unsaturated double bonds will be degraded by thermal oxidative aging, the molecular chains will be broken, and some oxygen-containing groups will be generated, such as carboxyl, aldehyde, ketone, hydroxyl, etc., that is, waste ABS recycled materials contain many carboxyl, aldehyde, ketone, and hydroxyl groups. Epoxy acrylate resin contains epoxy groups and acrylic acid groups. 2,2′-(1,3-phenylene)-dioxazoline is a compound containing two carbon, nitrogen, oxygen and carbon-nitrogen double bonds of five-membered heterocyclic rings. It has very active chemical properties and can undergo ring-opening reactions with carboxyl, anhydride, amino, epoxy, thiol, phenolic hydroxyl, isocyanate, etc. at a certain temperature. Therefore, under the action of 2,2′-(1,3-phenylene)-dioxazoline, epoxy acrylate resin can react with ABS. After the acrylic acid group and the epoxy group after ring opening, they can react with the carboxyl, aldehyde, ketone, hydroxyl, etc. formed by oxidative aging of ABS, that is, repair the oxidatively broken molecular chains and rebuild the cross-linked network structure. Dodecyl mercaptan can adjust the molecular weight during the reaction process and solve the problem of molecular weight reduction and molecular weight distribution broadening of waste ABS recyclate. In summary, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan can synergistically enhance the effectiveness, repair the oxidatively broken molecular chains, rebuild the cross-linked network structure, and thus improve the mechanical properties of waste ABS recyclate. Flame retardant, compatibilizer, toughening agent, anti-dripping agent, silicone powder can further improve the comprehensive performance of the chassis ABS shell material of the present application. Silicone powder has good lubrication effect and good compatibility with other components. The mechanical properties and flame retardancy of the chassis ABS shell material containing ITE of the present application are good, which can meet the standards for producing chassis ABS shells, is conducive to saving resources, protecting the environment, developing a circular economy, and reducing costs.

[0008] Optionally, the waste ABS recyclate is recovered by a recovery method, and the recovery method comprises the following steps: Screening: Screen out ABS waste; Crushing: crushing ABS waste into blocks; Grinding: Grind off the coating on the surface of the blocky ABS waste; Extrusion molding: The polished ABS waste is extruded and granulated to obtain granular waste ABS recycled materials.

[0009] By adopting the above technical solution, the polishing step removes the coating on the surface of the ABS waste, reducing the influence of the coating on the subsequent processing of the waste ABS recyclables. The extrusion molding step extrude the polished ABS waste into granules, and the granular waste ABS recyclables are conducive to the subsequent further processing of the waste ABS recyclables.

[0010] Optionally, the flame retardant is selected from a combination of one or more of organic montmorillonite, polyorganosiloxane, and benzoxazine resin.

[0011] By adopting the above technical scheme, the thermal stability of organic montmorillonite is high, and the layered structure of organic montmorillonite will form an isolation layer structure, which blocks the diffusion of heat and gas and thus plays a flame retardant role. Polyorganosiloxane decomposes at high temperature to generate non-volatile silicon compounds, which can cover the burning surface to form a dense shielding layer, preventing the further spread of combustion gas and heat, and slowing down the development of the fire. The silicon-oxygen bond in the functional group of polyorganosiloxane is easy to break at high temperature to form stable silicon oxygen free radicals, which react with free radicals in the flame, inhibit the free radical chain reaction, and reduce the combustion reaction rate, thereby playing a flame retardant role. Benzoxazine resin can form a barrier carbon layer, isolate oxygen and heat, and can significantly reduce the heat release rate and total heat release of ABS, thereby playing a flame retardant role.

[0012] Optionally, the compatibilizer is selected from a combination of one or more of butadiene-maleic anhydride copolymer and ethylene-acetic anhydride copolymer.

[0013] By adopting the above technical scheme, the butadiene-maleic anhydride copolymer has functional groups such as butadiene and maleic anhydride containing active double bonds. Under high temperature conditions, the active double bonds can undergo chemical reactions to form covalent bonds with functional groups in incompatible polymer materials. This chemical reaction can improve the compatibility between waste ABS recyclate and other components and promote their mixing and mutual dissolution. The maleic anhydride functional groups in the butadiene-maleic anhydride copolymer and the functional groups in the waste ABS recyclate can also interact with each other through non-covalent bonds such as hydrogen bonds and van der Waals forces to enhance the compatibility between materials, form a uniform mixed system, and reduce phase separation. Butadiene-maleic anhydride copolymer is a polymer composed of ethylene and acetic anhydride monomers in a copolymerized form. It can be evenly dispersed in the chassis ABS shell material system and act as a dispersant molecule. The presence of acetic anhydride monomer units in its molecular structure makes it have a certain lipophilicity; at the same time, the ethylene monomer unit also makes it have a certain hydrophilicity. This complex chemical property allows ethylene-acetic anhydride copolymer to be soluble in both hydrophilic and lipophilic substances in a solvent. When ethylene-acetic anhydride copolymer is used as a compatibilizer, its molecules can interact with the molecules of two immiscible substances, thereby reducing the interfacial tension between them and making them more miscible with each other.

[0014] Optionally, the toughening agent is a combination of one or more of polyurethane elastomer and ABS high-rubber powder.

[0015] By adopting the above technical solution, polyurethane elastomer and ABS high-rubber powder have the elongation and toughness of polymer chains, and can absorb external impact energy, thereby increasing the impact resistance of the material. Polyurethane elastomer has good compatibility with the acrylonitrile phase in ABS, and will not cause excessive phase interfaces with low bonding force in the system during toughening to affect the tensile properties of the toughened system. The similar structure of ABS high-rubber powder and ABS makes its toughened ABS system have good compatibility and is not easy to have an adverse effect on the mechanical properties of the system.

[0016] Optionally, the anti-drip agent is polytetrafluoroethylene.

[0017] By adopting the above technical solution, polytetrafluoroethylene has outstanding and excellent comprehensive properties, such as high temperature resistance, corrosion resistance, non-stick, self-lubrication, excellent dielectric properties, and very low friction coefficient. When added to the ABS shell material of the chassis, it can improve flame retardancy and drip resistance.

[0018] In the second aspect, the present application provides a method for preparing an ABS shell material of a chassis containing ITE, using the following technical solution: A method for preparing the above-mentioned ITE-containing chassis ABS shell material comprises the following steps: Mixing: After drying ITE at a temperature of 81-89°C, add epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, silicone powder, mix well to obtain a mixture; Melting: Melting the mixture under pressure to obtain a molten mixture; Extrusion granulation: The molten mixed material is extruded into granules, and after cooling and drying, the ABS shell material of the chassis containing ITE is obtained.

[0019] By adopting the above technical solution, mixing first and then melting, it is conducive to a more complete and uniform reaction between ITE and epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, and silicone powder. The extrusion granulation step obtains granular chassis ABS shell material containing ITE, which is conducive to subsequent processing. ABS has strong water absorption. Drying first during mixing and drying after cooling in the extrusion granulation step are both conducive to improving the yield rate of chassis ABS shell material containing ITE.

[0020] Optionally, in the smelting step, the smelting temperature is 172-182° C. and the smelting pressure is 2.1-2.4 MPa.

[0021] The experiment found that when the melting temperature was 172-182°C and the melting pressure was 2.1-2.4Mpa, the reaction between ITE and epoxy acrylate resin, 2,2′-(1,3-phenylene)-bisoxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent and silicone powder was more complete and uniform, and the mechanical properties of the ABS shell material containing ITE were good.

[0022] Optionally, in the smelting step, the smelting time is 5-9 minutes.

[0023] The experiment found that when the melting time was 5-9 minutes, the reaction between ITE and epoxy acrylate resin, 2,2′-(1,3-phenylene)-bisoxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent and silicone powder was sufficient and uniform, which was beneficial to improving the mechanical properties of the chassis ABS shell material.

[0024] Optionally, in the extrusion granulation step, the extrusion temperature is 195-215° C. and the main engine speed is 180-200 r / min.

[0025] The test found that the molding effect of the chassis ABS shell material containing ITE was good when the extrusion temperature was 195-215℃ and the main engine speed was 180-200r / min.

[0026] In summary, this application has the following beneficial effects: 1. Since ITE uses waste ABS recycled materials in the chassis ABS shell of this application, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan can synergistically enhance the efficiency, repair the molecular chains of waste ABS recycled materials that have been oxidized and broken, and rebuild the cross-linked network structure, thereby improving the mechanical properties of waste ABS recycled materials. Flame retardants, compatibilizers, toughening agents, anti-dripping agents, and silicone powder can further improve the comprehensive performance of the chassis ABS shell material of this application. This application reuses waste ABS recycled materials, namely ITE, in the production of chassis ABS shells, which has good mechanical properties, is conducive to saving resources, protecting the environment, developing a circular economy, and reducing costs.

[0027] 2. The preparation method of the present application, through mixing, melting, and extrusion granulation, is conducive to a more complete and uniform reaction between ITE and epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, and silicone powder, and the prepared chassis ABS shell has good mechanical properties.

[0028] 3. In the smelting step, the smelting temperature is 172-182°C, the smelting pressure is 2.1-2.4Mpa, and the smelting time is 5-9min. In the extrusion granulation step, the extrusion temperature is 195-215°C and the main engine speed is 180-200r / min, so that the reaction between ITE and epoxy acrylate resin, 2,2′-(1,3-phenylene)-bisoxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, and silicone powder is more sufficient and uniform, and the prepared chassis ABS shell has good mechanical properties. DETAILED DESCRIPTION

[0029] The present application is described in further detail below.

[0030] Raw materials introduction The following is an introduction to the raw materials.

[0031] Table 1 Raw materials raw material Origin and model introduction Epoxy acrylate resin Model:HYSZ-005,CAS:55818-57-0 2,2′-(1,3-phenylene)-bisoxazoline CAS: 34052-90-9, content ≥ 98% Dodecyl mercaptan CAS: 25103-58-6, content ≥ 99% Organic montmorillonite Model: DK-4 (nano grade), CAS: 68153-34-4 Polysiloxane Model: 500cs, CAS: 63148-53-8 Benzoxazine resin Model: BZ 9130, CAS: 51852-81-4 Butadiene-maleic anhydride copolymer Model: MA-75, content ≥99% Ethylene-acetic anhydride copolymer <![CDATA[Molecular formula: (C2H4) 100 .(C4H6O2) 200 , content ≥ 99%]]> Polyurethane elastomer Model: WY1157, molecular weight: 3000-5000 ABS high glue powder Model: HR-181, content ≥99% Polytetrafluoroethylene Model: M-12, CAS: 9002-84-0 Silicone powder Model: KJ-B01, content ≥99% ABS resin Model: Kingfa Technology HF606 Preparation Example Preparation Example 1 The waste ABS recyclate is recovered by a recycling method, which includes the following steps: Screening: Screen out ABS waste, which comes from discarded computer host shells; Crushing: crushing ABS waste into blocks; Grinding: Grind off the coating on the surface of the blocky ABS waste; Extrusion molding: The polished ABS waste is extruded and granulated using a granulator to obtain granular waste ABS recyclables. Example

[0032] Example 1 An ABS shell material for a chassis containing ITE, comprising the following components: 9.4 kg of ITE, 2.2 kg of epoxy acrylate resin, 0.5 kg of 2,2′-(1,3-phenylene)-bisoxazoline, 0.03 kg of dodecyl mercaptan, 1.7 kg of flame retardant, 0.2 kg of compatibilizer, 0.6 kg of toughening agent, 0.05 kg of anti-dripping agent, and 0.1 kg of silicone powder; ITE uses the waste ABS recycled material in Preparation Example 1.

[0033] The flame retardant is organic montmorillonite.

[0034] The compatibilizer is a combination of butadiene-maleic anhydride copolymer and ethylene-acetic anhydride copolymer, and the weight ratio of the butadiene-maleic anhydride copolymer to the ethylene-acetic anhydride copolymer is 1:3.

[0035] The toughening agent is polyurethane elastomer.

[0036] The anti-drip agent is polytetrafluoroethylene.

[0037] A method for preparing the above-mentioned ITE-containing chassis ABS shell material comprises the following steps: Mixing: After drying ITE at a temperature of 81°C, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, and silicone powder are added and mixed evenly to obtain a mixture; Melting: Use a pressurized induction melting furnace to pressurize and melt the mixture at a melting temperature of 182°C, a melting pressure of 2.1 MPa, and a melting time of 9 minutes to obtain a molten mixture; Extrusion granulation: The molten mixed material is extruded and granulated by an extruder, the extrusion temperature is 195°C, the main engine speed is 200r / min, and after cooling and drying, the drying temperature is 50°C, and the drying time is 1h to obtain the chassis ABS shell material containing ITE.

[0038] Example 2 An ABS shell material for a chassis containing ITE, comprising the following components: 10.8 kg of ITE, 1.0 kg of epoxy acrylate resin, 0.7 kg of 2,2′-(1,3-phenylene)-bisoxazoline, 0.01 kg of dodecyl mercaptan, 3.3 kg of flame retardant, 0.08 kg of compatibilizer, 1.2 kg of toughening agent, 0.01 kg of anti-dripping agent, and 1.1 kg of silicone powder; ITE uses the waste ABS recycled material in Preparation Example 1.

[0039] The flame retardant is a combination of organic montmorillonite, polyorganosiloxane and benzoxazine resin, and the weight ratio of the organic montmorillonite, polyorganosiloxane and benzoxazine resin is 1:2:0.5.

[0040] The compatibilizer is butadiene-maleic anhydride copolymer.

[0041] The toughening agent is ABS high rubber powder.

[0042] The anti-drip agent is polytetrafluoroethylene.

[0043] A method for preparing the above-mentioned ITE-containing chassis ABS shell material comprises the following steps: Mixing: After drying ITE at a temperature of 89°C, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, and silicone powder are added and mixed evenly to obtain a mixture; Melting: Use a pressurized induction melting furnace to pressurize and melt the mixture at a melting temperature of 172°C, a melting pressure of 2.4 MPa, and a melting time of 5 minutes to obtain a molten mixture; Extrusion granulation: The molten mixed material is extruded and granulated by an extruder, the extrusion temperature is 215°C, the main engine speed is 180r / min, and after cooling and drying, the drying temperature is 50°C, and the drying time is 1h to obtain the chassis ABS shell material containing ITE.

[0044] Example 3 An ABS housing material for a chassis containing ITE, comprising the following components: 10.1 kg of ITE, 1.6 kg of epoxy acrylate resin, 0.6 kg of 2,2′-(1,3-phenylene)-bisoxazoline, 0.02 kg of dodecyl mercaptan, 2.5 kg of flame retardant, 0.14 kg of compatibilizer, 0.9 kg of toughening agent, 0.03 kg of anti-dripping agent, and 0.6 kg of silicone powder; ITE uses the waste ABS recycled material in Preparation Example 1.

[0045] The flame retardant is a combination of organic montmorillonite and benzoxazine resin, and the weight ratio of the organic montmorillonite to the benzoxazine resin is 1:0.5.

[0046] The compatibilizer is ethylene-acetic anhydride copolymer.

[0047] The toughening agent is a combination of polyurethane elastomer and ABS high rubber powder, and the weight ratio of the polyurethane elastomer to the ABS high rubber powder is 1:1.

[0048] The anti-drip agent is polytetrafluoroethylene.

[0049] A method for preparing the above-mentioned ITE-containing chassis ABS shell material comprises the following steps: Mixing: After drying ITE at a temperature of 85°C, epoxy acrylate resin, 2,2′-(1,3-phenylene)-bisoxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, silicone powder are added and mixed evenly to obtain a mixture; Melting: Use a pressurized induction melting furnace to pressurize and melt the mixture at a melting temperature of 177°C, a melting pressure of 2.2 MPa, and a melting time of 7 minutes to obtain a molten mixture; Extrusion granulation: The molten mixed material is extruded and granulated by an extruder, the extrusion temperature is 205°C, the main engine speed is 190r / min, and after cooling and drying, the drying temperature is 50°C, and the drying time is 1h to obtain the chassis ABS shell material containing ITE.

[0050] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 3 is that no epoxy acrylate resin is added in Comparative Example 1.

[0051] Comparative Example 2 The difference between Comparative Example 2 and Example 3 is that in Comparative Example 2, no 2,2′-(1,3-phenylene)-dioxazoline is added.

[0052] Comparative Example 3 The difference between Comparative Example 3 and Example 3 is that dodecanethiol is not added in Comparative Example 3.

[0053] Comparative Example 4 The difference between Comparative Example 4 and Example 3 is that in Comparative Example 4, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline and dodecyl mercaptan are not added.

[0054] Comparative Example 5 The difference between Comparative Example 5 and Example 3 is that commercially available ABS resin is used instead of ITE, that is, commercially available ABS resin is used instead of the waste ABS recycled material in Preparation Example 1, and epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline and dodecyl mercaptan are not added.

[0055] Performance Testing The ITE-containing chassis ABS shell materials of Examples 1-3 and the ABS materials of Comparative Examples 1-5 were dried at 80° C. for 2 h, and then injection molded into standard specimens required for various tests using an injection molding machine for testing. The temperature of the injection molding machine was 210° C., the injection pressure was 35.0 MPa, and the holding pressure was 45.0 MPa.

[0056] Melt index: tested according to ASTM D1238; Specific gravity: Tested according to ASTM D792; Tensile strength: tested according to ASTM D638; Elongation: Tested according to ASTM D638; Bending strength: tested according to ASTM D790; Flexural elastic modulus: tested according to ASTM D790; Impact strength: tested according to ASTM D256; Hardness: Tested according to ASTM D785; Heat deformation temperature: Tested according to ASTM D648; Shrinkage: Tested according to ASTM D955; UL combustion grade: Tested in accordance with UL94.

[0057] Mechanical properties tests such as tensile strength, elongation, bending strength, bending elastic modulus, impact strength, and hardness were performed on the ITE-containing chassis ABS shell materials of Examples 1-3 and the ABS materials of Comparative Examples 1-5.

[0058] The ITE-containing chassis ABS shell material of Example 3 was subjected to performance tests such as melt index, specific gravity, tensile strength, elongation, flexural strength, flexural elastic modulus, impact strength, hardness, heat deformation temperature, shrinkage, and UL combustion grade.

[0059] The test results are as follows: Table 2 Mechanical properties test results Table 3 Performance test results of Example 3 It can be seen from Table 2 that the tensile strength, elongation, bending strength, bending elastic modulus, impact strength, hardness and other mechanical properties of Examples 1-3 are all good. This shows that the present application reuses the waste ABS recyclate, i.e. ITE, for the production of chassis ABS shell, which has good mechanical properties, is conducive to saving resources, protecting the environment, developing a circular economy and reducing costs.

[0060] Comparing Example 3 with Comparative Example 1, the mechanical properties of Example 3 are significantly better than those of Comparative Example 1, indicating that epoxy acrylate resin plays an important role in improving the mechanical properties of waste ABS recyclate.

[0061] Comparing Example 3 with Comparative Example 2, the mechanical properties of Example 3 are significantly better than those of Comparative Example 2, indicating that 2,2′-(1,3-phenylene)-bisoxazoline plays an important role in improving the mechanical properties of waste ABS recyclate.

[0062] Comparing Example 3 with Comparative Example 3, the mechanical properties of Example 3 are significantly better than those of Comparative Example 3, indicating that dodecyl mercaptan plays an important role in improving the mechanical properties of waste ABS recyclate.

[0063] Comparing Example 3 with Comparative Example 4, the various mechanical properties of Example 3 are significantly better than those of Comparative Example 4, indicating that epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan play an important role in improving the mechanical properties of waste ABS recyclate. In summary, epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan can synergize to improve the mechanical properties of waste ABS recyclate. This is because epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, and dodecyl mercaptan can synergize to repair the molecular chains of waste ABS recyclate that have been oxidized and broken, and rebuild the cross-linked network structure.

[0064] Comparing Example 3 with Comparative Example 5, various mechanical properties of Example 3 are better than those of Comparative Example 5, indicating that the mechanical properties of the ABS shell material of the chassis containing ITE in the present application are better than those of general-purpose ABS.

[0065] It can be seen from Table 3 that the melt index, specific gravity, tensile strength, elongation, flexural strength, flexural elastic modulus, impact strength, hardness, heat deformation temperature, shrinkage rate, UL combustion and other properties of Example 3 are all good, indicating that the chassis ABS shell material containing ITE of the present application has excellent performance and is suitable for making chassis shells.

[0066] The above specific embodiments are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make modifications to the present application without any creative contribution as needed, but all modifications shall be included in the scope of protection of the present application.

Claims

1. A chassis ABS shell material containing ITE, characterized in that: The invention comprises the following components by weight: 94-108 parts of ITE, 10-22 parts of epoxy acrylate resin, 5-7 parts of 2,2′-(1,3-phenylene)-bisoxazoline, 0.1-0.3 parts of dodecyl mercaptan, 17-33 parts of flame retardant, 0.8-2 parts of compatibilizer, 6-12 parts of toughening agent, 0.1-0.5 parts of anti-dripping agent and 1-11 parts of silicone powder; the ITE is made of waste ABS recycled material.

2. The ABS shell material for a chassis containing ITE according to claim 1, characterized in that: The waste ABS recyclate is obtained by recycling through a recycling method. The following steps are involved: Screening: Screen out ABS waste; Crushing: crushing ABS waste into blocks; Grinding: Grind off the coating on the surface of the blocky ABS waste; Extrusion molding: The polished ABS waste is extruded and granulated to obtain granular waste ABS recycled materials.

3. The ABS shell material for a chassis containing ITE according to claim 1, characterized in that: The flame retardant is selected from one or more combinations of organic montmorillonite, polyorganosiloxane, and benzoxazine resin.

4. The ABS shell material for a chassis containing ITE according to claim 1, characterized in that: The compatibilizer is selected from a combination of one or more of butadiene-maleic anhydride copolymer and ethylene-acetic anhydride copolymer.

5. The ABS shell material for a chassis containing ITE according to claim 1, characterized in that: The toughening agent is selected from a combination of one or more of polyurethane elastomer and ABS high-rubber powder.

6. The ABS shell material for a chassis containing ITE according to claim 1, characterized in that: The anti-dripping agent is polytetrafluoroethylene.

7. A method for preparing an ABS shell material for a chassis containing ITE according to any one of claims 1 to 6, characterized in that: The following steps are involved: Mixing: After drying ITE at a temperature of 81-89°C, add epoxy acrylate resin, 2,2′-(1,3-phenylene)-dioxazoline, dodecyl mercaptan, flame retardant, compatibilizer, toughening agent, anti-dripping agent, silicone powder, mix well to obtain a mixture; Melting: Melting the mixture under pressure to obtain a molten mixture; Extrusion granulation: The molten mixed material is extruded into granules, and after cooling and drying, the ABS shell material of the chassis containing ITE is obtained.

8. The method for preparing an ABS shell material for a chassis containing ITE according to claim 7, characterized in that: In the smelting step, the smelting temperature is 172-182° C. and the smelting pressure is 2.1-2.4 MPa.

9. The method for preparing an ABS shell material for a chassis containing ITE according to claim 8, characterized in that: In the smelting step, the smelting time is 5-9 minutes.

10. The method for preparing an ABS shell material for a chassis containing ITE according to claim 7, characterized in that: In the extrusion granulation step, the extrusion temperature is 195-215° C. and the main engine speed is 180-200 r / min.

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