High-strength wear-resistant ABS material

Abstract

The invention relates to a high-strength wear-resistant ABS (Acrylonitrile Butadiene Styrene) material which has the excellent characteristics of high temperature resistance, high wear resistance and corrosion resistance, and belongs to the technical field of polymer composite materials. The ABS material is prepared from the following raw materials: methyl methacrylate grafted ABS, a plasticizer, a surfactant, a flame retardant, a compatilizer, a wear-resistant agent and an antioxidant. According to the scheme, methyl methacrylate grafted ABS is used as a base material, polytetrafluoroethylene is used as a wear-resistant agent, and the methyl methacrylate grafted ABS and the polytetrafluoroethylene are combined, so that the material has excellent wear resistance and corrosion resistance; the overall mixing uniformity is greatly improved by adding the surfactant and the compatilizer, and the overall comprehensive performance of the material is improved by adding the plasticizer, the antioxidant and other auxiliaries. The material overcomes the problems that the ABS raw material is easy to age and poor in corrosion resistance and wear resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer composites and relates to a high-strength and wear-resistant ABS material. Background Art

[0002] As one of the most commonly used resins in daily production and life, ABS resin has the characteristics of light weight, good plasticity, delicate surface, good smoothness, etc., and can be prepared into the desired shape according to its properties. However, ABS resin has disadvantages such as low hardness and poor wear resistance, which limit its application in more industrial fields. Therefore, developing polymer materials that can meet the diverse needs of products and providing green materials for green production has become a hot topic in current research. Studying new polymer materials not only requires a large amount of manpower and material resources but also has a high development difficulty. By grafting and modifying ABS resin, high-performance polymer materials can be obtained simply and quickly. Therefore, providing an ABS material with high temperature resistance, high corrosion resistance, and high strength and wear resistance is an urgent problem to be solved by those skilled in the art.

[0003] Chinese Patent with Publication No. CN201510499328.7 discloses a high-strength ABS pipe. The pipe comprises the following raw materials in parts by weight: 60 parts of ABS resin, 26 parts of polyacrylate, 7 parts of stabilizer, 5 parts of foaming agent, and 2 parts of antioxidant. However, this patent does not effectively improve and enhance the flame retardancy, wear resistance, and low-temperature resistance of the polymer material.

[0004] Chinese Patent with Publication No. CN201510780569 discloses a high-strength and wear-resistant environmental protection plastic, belonging to the technical field of plastics, which comprises the following components: 60 - 80 parts of PAA copolymer, 30 - 50 parts of polylactic acid PLA, 10 - 25 parts of ethylene-vinyl acetate copolymer EVA, 4 - 8 parts of plant powder, 3 - 6 parts of graphite fiber, 2 - 5 parts of silane coupling agent KH550, 3 - 8 parts of ABS grafted maleic anhydride, 3 - 6 parts of styrene-butadiene thermoplastic elastomer SBS, 5 - 10 parts of methyl methacrylate-butadiene-styrene copolymer MBS, 1 - 5 parts of hydrogenated styrene-butadiene-styrene block copolymer SEBS, 3 - 8 parts of dipentaerythritol ester PCB, 3 - 6 parts of epoxidized soybean oil octyl ester, 2 - 5 parts of tetrabutyl citrate, 1 - 3 parts of monoglyceride stearate, 15 - 18 parts of kaolin, 7 - 12 parts of coal ash powder, 5 - 10 parts of sericite powder, 4 - 10 parts of white carbon black, and 1 - 3 parts of antioxidant SP. This patent has too many and complex components, and it is difficult to accurately control the relative molecular mass of the polymer material after grafting, which will have an adverse impact on the high temperature resistance and wear resistance of the material. Summary of the Invention

[0005] The object of the present invention is to provide a high-strength and wear-resistant ABS material, which has the characteristics of high temperature resistance, high corrosion resistance and high strength and wear resistance.

[0006] The object of the present invention can be achieved by the following technical solutions:

[0007] A high-strength and wear-resistant ABS material, comprising the following raw materials in parts by weight: 60-80 parts of methyl methacrylate grafted ABS, 3-5 parts of plasticizer, 1-7 parts of surfactant, 0.1-0.7 parts of flame retardant, 1-5 parts of compatibilizer, 3-5 parts of wear-resistant agent and 0.2-1 part of antioxidant.

[0008] As a preferred technical solution of the present invention, the methyl methacrylate grafted ABS is obtained by the following method:

[0009] S1. Accurately weigh 15-20 parts by weight of ABS resin and add it to a four-necked round-bottom flask equipped with a stirrer and a condenser, and add 100-200 parts by weight of toluene for use;

[0010] S2. Weigh 7-8 parts by weight of initiator and 10-13 parts by weight of methyl methacrylate, and prepare a mixed solution of monomer and initiator, and add it to a constant pressure dropping funnel for use;

[0011] S3. Under the protection of nitrogen, heat the four-necked round-bottom flask in an oil bath to the set temperature. After the ABS resin is completely dissolved, add the mixed solution of monomer and initiator dropwise to the four-necked round-bottom flask in two times;

[0012] S4. After the first dropwise addition is completed, keep the temperature for reaction, and then add the remaining mixed solution dropwise. The dropping time is 0.5 ～ 1 h. After the dropping is completed, continue to keep the temperature for reaction;

[0013] S5. After the reaction is complete, cool to room temperature, inject the product into an ethanol solution that is vigorously stirred, observe the precipitation of the product, filter to obtain the crude product, and wash the crude product with ethanol to remove the excess unreacted methyl methacrylate;

[0014] S6. Then purify the washed crude product with absolute ethanol, remove the solvent and put it in a vacuum oven for vacuum drying, and finally obtain methyl methacrylate grafted ABS.

[0015] As a preferred technical solution of the present invention, the plasticizer is dioctyl phthalate, the surfactant is one or more of alkylphenol polyoxyethylene ether, polyoxyethylene alkyl ether, polyoxyethylene alkylamine and fatty acid polyoxyethylene ester, the wear-resistant agent is polytetrafluoroethylene, the compatibilizer is composed of polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer, the antioxidant is one or more of antioxidant 168, antioxidant 264, antioxidant DLTP, 2,6-di-tert-butyl-4-methylphenol, bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide, and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and the flame retardant is mainly one or more of tetraphenyl(bisphenol-A) diphosphate, resorcinol bis(diphenyl) phosphate, tolyl diphenyl phosphate, tricresyl phosphate and triphenyl phosphate.

[0016] As a preferred technical solution of the present invention, in step S2, the initiator is benzoyl peroxide.

[0017] As a preferred technical solution of the present invention, in step S3, the set temperature is 100-150°C.

[0018] As a preferred technical solution of the present invention, in step S4, the two heat preservation reaction times are both controlled within 2-2.5 h.

[0019] As a preferred technical solution of the present invention, in step S5, the washing means washing with ethanol each time, and the number of washing times is 3-5 times.

[0020] As a preferred technical solution of the present invention, in step S6, the temperature of the vacuum oven is controlled at 60-80°C, and the vacuum drying time is 6-10 h.

[0021] As a preferred technical solution of the present invention, the preparation method of the polymethyl methacrylate grafted maleic anhydride is as follows:

[0022] (1) Mix 30 parts by weight of polymethyl methacrylate with 2-10 parts by weight of maleic anhydride, and plasticize in a Haake rheometer at a temperature of 140°C and a rotation speed of 100 rpm for 1-2 min to obtain a plasticized material;

[0023] (2) Mix the above-obtained plasticized material with 0.1-0.5 parts by weight of the initiator dicumyl peroxide, and continue to carry out intensive mixing in a Haake rheometer at a temperature of 140°C and a rotation speed of 70 rpm for 2 min to obtain polymethyl methacrylate grafted maleic anhydride.

[0024] As a preferred technical solution of the present invention, the high wear-resistant ABS material is prepared by the following method:

[0025] S11. Weigh methyl methacrylate grafted ABS, plasticizer, surfactant, compatibilizer and wear-resistant agent according to the dosage, put them into a high-speed mixing device for mixing, then reduce the mixing rate, and then add the flame retardant and antioxidant into the mixing device for mixing. Raise the temperature, increase the rotation speed, and mix and stir to obtain a uniform molten liquid.

[0026] S12. Transfer the obtained uniform molten liquid to a hopper, cool it to 40 °C, use a screw extruder for extrusion molding, and then cool and solidify it on a mold to obtain a high-strength wear-resistant ABS material.

[0027] As a preferred technical solution of the present invention, in step S11, the mixing and stirring time is 15 - 30 min, and the temperature is raised to 100 - 150 °C.

[0028] As a preferred technical solution of the present invention, in step S12, the ratio of the length to the diameter of the twin screws of the extruder is ≥ 30:1, the rotation speed is 350 - 700 rpm, and the extrusion temperature is 180 - 230 °C.

[0029] The beneficial effects of the present invention:

[0030] (1) The present invention adopts a segmented feeding method. First, methyl methacrylate grafted ABS and some components with unsaturated groups are added to a high-speed mixing device for high-speed mixing, and then the flame retardant and antioxidant are added for mixing and stirring, avoiding the decomposition reaction of the flame retardant and antioxidant due to too long mixing time, and also better avoiding the yellowing phenomenon caused by oxidation during the reaction process, improving the grafting reaction effect, and also improving the smoothness and wear resistance of the ABS material.

[0031] (2) The present invention uses methyl methacrylate grafted modified ABS as the base material, and uses polymethyl methacrylate grafted maleic anhydride and styrene - maleic anhydride copolymer as compatibilizers. Among them, polymethyl methacrylate grafted maleic anhydride has the same monomer partial structure as methyl methacrylate grafted ABS resin, making methyl methacrylate grafted ABS mix more uniformly in the resin; the addition of styrene - maleic anhydride copolymer, the copolymer will form hydrogen bond interaction with the polar groups of the surfactant molecules, making the copolymer wind around the outer surface of polytetrafluoroethylene to form a whisker structure, improving the stability, viscosity and interfacial bonding force of polytetrafluoroethylene in the resin. Under the interaction of the compatibilizer, interfacial bonding force and intermolecular force, polytetrafluoroethylene can be more uniformly dispersed in the resin, and the ABS material improves the mechanical properties and wear resistance of the material as a whole, and the produced products have lower harmfulness and better effects in life and production.

[0032] (3) The present invention provides a high-strength and wear-resistant ABS material. A compatibilizer is formed by mixing polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer in a specific mass ratio. And a non-ionic surfactant is selected to perform surface treatment on polytetrafluoroethylene, so that the surface activity of polytetrafluoroethylene is improved and it has a strong interfacial bonding force. Under the synergistic effect of the compatibilizer and the surfactant, using the principles of surfactant, material compatibility and matrix fluidity, methyl methacrylate grafted ABS and polytetrafluoroethylene are combined through intermolecular forces and interfacial bonding forces. Polytetrafluoroethylene can be more evenly dispersed in the resin and act together with methyl methacrylate grafted ABS to form a dense surface layer, thereby achieving low friction coefficient while also having good corrosion resistance. Detailed implementation manners

[0033] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines examples to detail the specific implementation manners, structures, features and their effects according to the present invention as follows.

[0034] Example 1

[0035] A high-strength and wear-resistant ABS material, comprising the following raw materials in parts by weight: 60 parts of methyl methacrylate grafted ABS, 3 parts of plasticizer, 3 parts of surfactant, 0.2 part of flame retardant, 2 parts of compatibilizer, 4 parts of wear-resistant agent and 0.2 part of antioxidant.

[0036] The plasticizer is dioctyl phthalate, the wear-resistant agent is polytetrafluoroethylene, the flame retardant is tetraphenyl (bisphenol-A) diphosphate, the antioxidant is antioxidant 168, the surfactant is alkylphenol polyoxyethylene ether, and the compatibilizer is composed of polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer in a ratio of 1:1 by weight. The preparation method of polymethyl methacrylate grafted maleic anhydride is as follows:

[0037] (1) Mix 30 parts by weight of polymethyl methacrylate and 10 parts by weight of maleic anhydride, and knead in a Haake rheometer at a temperature of 140 °C and a rotation speed of 100 rpm for 1 min to obtain a kneaded material;

[0038] (2) Mix the above-obtained kneaded material with 0.2 part by weight of initiator diisopropylbenzene peroxide, and continue to knead in a Haake rheometer at a temperature of 140 °C and a rotation speed of 70 rpm for 2 min to obtain polymethyl methacrylate grafted maleic anhydride.

[0039] The methyl methacrylate grafted ABS is obtained by the following method:

[0040] S1. Accurately weigh 17 parts by weight of ABS resin and add it to a four-necked round-bottom flask equipped with a stirrer and a condenser. Add 150 parts by weight of toluene and set aside for use.

[0041] S2. Weigh 7 parts by weight of benzoyl peroxide and 10 parts by weight of methyl methacrylate, and prepare a mixed solution of monomer and initiator. Add it to a constant-pressure dropping funnel and set aside for use.

[0042] S3. Under nitrogen protection, heat the four-necked round-bottom flask in an oil bath to 130 °C. After the ABS resin is completely dissolved, slowly add the mixed solution of monomer and initiator to the four-necked flask in two portions.

[0043] S4. After the first addition is completed, keep the reaction at a constant temperature for 2 h, and then add the remaining mixed solution dropwise. The dropping time is 1 h. After the dropping is completed, continue to keep the reaction at a constant temperature for 2 h.

[0044] S5. After the reaction is complete, cool to room temperature, pour the product into an ethanol solution that is being vigorously stirred, observe the precipitation of the product, filter to obtain the crude product, and wash the crude product 5 times with a large amount of ethanol to remove the excess unreacted methyl methacrylate.

[0045] S6. Then purify the washed crude product with absolute ethanol, remove the solvent, and place it in a vacuum oven at 80 °C for vacuum drying for 10 h. Finally, obtain methyl methacrylate-grafted ABS.

[0046] The high wear-resistant ABS composite material is prepared by the following method:

[0047] S11. Weigh methyl methacrylate-grafted ABS, plasticizer, surfactant, compatibilizer, and wear-resistant agent according to the proportions and put them into a high-speed mixing device for mixing. Then reduce the mixing rate, and add the flame retardant and antioxidant to the mixing device for mixing. Raise the temperature to 120 °C, increase the rotation speed, and mix and stir for 20 min to obtain a uniform molten liquid.

[0048] S12. Transfer the obtained uniform molten liquid to a hopper, cool to 40 °C, and use a screw extruder for extrusion molding, and then cool and solidify on a mold to obtain a high wear-resistant ABS material; wherein, the ratio of the length to the diameter of the twin screws of the extruder is 30:1, the screw rotation speed is 600 rpm, and the extrusion temperature is 230 °C.

[0049] Example 2

[0050] A high-strength and wear-resistant ABS material, comprising the following raw materials in parts by weight: 70 parts of methyl methacrylate-grafted ABS, 3 parts of plasticizer, 5 parts of surfactant, 0.2 part of flame retardant, 3.5 parts of compatibilizer, 4 parts of wear-resistant agent, and 0.2 part of antioxidant.

[0051] The plasticizer is dioctyl phthalate, the wear-resistant agent is polytetrafluoroethylene, the flame retardant is resorcinol bis(diphenyl) phosphate, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the surfactant is polyoxyethylene alkylamine, and the compatibilizer is composed of polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer in a ratio of 1:1 by weight. The preparation method of polymethyl methacrylate grafted maleic anhydride is as follows:

[0052] (1) Mix 30 parts by weight of polymethyl methacrylate with 10 parts by weight of maleic anhydride, and knead in a Haake rheometer at a temperature of 140°C and a rotation speed of 100 rpm for 1 min to obtain a kneaded material;

[0053] (2) Mix the obtained kneaded material with 0.2 parts by weight of initiator diisopropylbenzene peroxide, and continue to carry out intensive mixing in a Haake rheometer at a temperature of 140°C and a rotation speed of 70 rpm for 2 min to obtain polymethyl methacrylate grafted maleic anhydride.

[0054] The methyl methacrylate grafted ABS is obtained by the following method:

[0055] S1. Accurately weigh 17 parts by weight of ABS resin and add it to a four-necked round-bottom flask equipped with a stirrer and a condenser, and add 150 parts by weight of toluene for use;

[0056] S2. Weigh 7 parts by weight of benzoyl peroxide and 10 parts by weight of methyl methacrylate, prepare a mixed solution of monomer and initiator, add it to a constant pressure dropping funnel for use;

[0057] S3. Under nitrogen protection, heat the four-necked round-bottom flask in an oil bath to 130°C. After the ABS resin is completely dissolved, slowly add the mixed solution of monomer and initiator to the four-necked round-bottom flask in two portions;

[0058] S4. After the first addition is completed, keep the reaction at a constant temperature for 2 h, then add the remaining mixed solution dropwise. The dropping time is 1 h. After the dropping is completed, continue to keep the reaction at a constant temperature for 2 h;

[0059] S5. After the reaction is complete, cool to room temperature, inject the product into an ethanol solution under vigorous stirring, observe the precipitation of the product, filter to obtain the crude product, and wash the crude product with a large amount of ethanol 5 times to remove the excess unreacted methyl methacrylate;

[0060] S6. Then purify the washed crude product with absolute ethanol, remove the solvent, put it into a vacuum oven at 80°C for vacuum drying for 10 h, and finally obtain methyl methacrylate grafted ABS.

[0061] The high wear-resistant ABS composite material is prepared by the following method:

[0062] S11. Weigh methyl methacrylate grafted ABS, plasticizer, surfactant, compatibilizer and wear-resistant agent by weight, put them into a high-speed mixing device for mixing, then reduce the mixing rate, and then add the flame retardant and antioxidant into the mixing device for mixing. Raise the temperature to 120 °C, increase the rotation speed, and mix and stir for 20 minutes to obtain a uniform molten liquid; the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer is 1:1.

[0063] S12. Transfer the above-obtained uniform molten liquid to a hopper, cool it to 40 °C, use a screw extruder for extrusion molding, and then cool and solidify it on a mold to obtain a high-wear-resistant ABS material; among them, the ratio of the length to the diameter of the twin-screw of the extruder is 30:1, the screw rotation speed is 600 rpm, and the extrusion temperature is 230 °C.

[0064] Example 3

[0065] A high-strength and wear-resistant ABS material, comprising the following raw materials in parts by weight: 80 parts of methyl methacrylate grafted ABS, 3 parts of plasticizer, 7 parts of surfactant, 0.2 parts of flame retardant, 5 parts of compatibilizer, 4 parts of wear-resistant agent and 0.2 parts of antioxidant.

[0066] The plasticizer is dioctyl phthalate, the wear-resistant agent is polytetrafluoroethylene, the flame retardant is triphenyl phosphate, the antioxidant is pentaerythritol tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], the surfactant is fatty acid polyoxyethylene ester, and the compatibilizer is composed of polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer in a ratio of 1:1 by weight. The preparation method of polymethyl methacrylate grafted maleic anhydride is as follows:

[0067] (1) Mix 30 parts by weight of polymethyl methacrylate with 10 parts by weight of maleic anhydride, and plasticize in a Haake rheometer at a temperature of 140 °C and a rotation speed of 100 rpm for 1 minute to obtain a plasticized material;

[0068] (2) Mix the above-obtained plasticized material with 0.2 parts by weight of the initiator diisopropylbenzene peroxide, and continue to carry out intensive mixing in a Haake rheometer at a temperature of 140 °C and a rotation speed of 70 rpm for 2 minutes to obtain polymethyl methacrylate grafted maleic anhydride.

[0069] The methyl methacrylate grafted ABS is obtained by the following method:

[0070] S1. Accurately weigh 17 parts by weight of ABS resin and add it to a four-necked round-bottom flask equipped with a stirrer and a condenser, and add 150 parts by weight of toluene for later use;

[0071] S2. Weigh 7 parts by weight of benzoyl peroxide and 10 parts by weight of methyl methacrylate, and prepare a mixed solution of monomer and initiator. Add it to a constant pressure dropping funnel for later use.

[0072] S3. Under nitrogen protection, heat the four-necked round-bottom flask in an oil bath to 130 °C. After the ABS resin is completely dissolved, slowly add the mixed solution of monomer and initiator to the four-necked round-bottom flask in two portions.

[0073] S4. After the first addition is completed, keep the reaction at a constant temperature for 2 h, and then add the remaining mixed solution dropwise. The dropping time is 1 h. After the dropping is completed, continue to keep the reaction at a constant temperature for 2 h.

[0074] S5. After the reaction is complete, cool to room temperature, pour the product into an ethanol solution that is being vigorously stirred, observe the precipitation of the product, filter by suction to obtain the crude product, and wash the crude product with a large amount of ethanol 5 times to remove the excess unreacted methyl methacrylate.

[0075] S6. Then purify the washed crude product with absolute ethanol, remove the solvent, and place it in a vacuum oven at 80 °C for vacuum drying for 10 h. Finally, obtain methyl methacrylate grafted ABS.

[0076] The high wear-resistant ABS composite material is prepared by the following method:

[0077] S11. Weigh methyl methacrylate grafted ABS, plasticizer, surfactant, compatibilizer, and wear-resistant agent according to the dosage, put them into a high-speed mixing device for mixing, then reduce the mixing rate, and then add the flame retardant and antioxidant to the mixing device for mixing. Raise the temperature to 120 °C, increase the rotation speed, and mix and stir for 20 min to obtain a uniform molten liquid; the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer is 1:1.

[0078] S12. Transfer the obtained uniform molten liquid to a hopper, cool to 40 °C, use a screw extruder for extrusion molding, and then cool and solidify on a mold to obtain a high wear-resistant ABS material; among them, the ratio of the length to the diameter of the twin screws of the extruder is 30:1, the screw rotation speed is 600 rpm, and the extrusion temperature is 230 °C.

[0079] Example 4

[0080] Compared with Example 1, the difference in Example 4 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 1:2.

[0081] Example 5

[0082] Compared with Example 1, the difference in Example 5 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 2:1.

[0083] Example 6

[0084] Compared with Example 2, the difference in Example 6 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 1:2.

[0085] Example 7

[0086] Compared with Example 2, the difference in Example 7 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 2:1.

[0087] Example 8

[0088] Compared with Example 3, the difference in Example 8 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 1:2.

[0089] Example 9

[0090] Compared with Example 3, the difference in Example 9 is that the composition ratio of the compatibilizer polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer added in step S11 is 2:1.

[0091] Comparative Example 1

[0092] Compared with Example 1, the main difference in Comparative Example 1 is that only polymethyl methacrylate grafted maleic anhydride is added as the compatibilizer in step S11.

[0093] Comparative Example 2

[0094] Compared with Example 1, the main difference in Comparative Example 2 is that only styrene-maleic anhydride copolymer is added as the compatibilizer in step S11.

[0095] Comparative Example 3

[0096] Compared with Example 1, the main difference in Comparative Example 3 is that no compatibilizer is added in step S11.

[0097] Comparative Example 4

[0098] Compared with Example 1, the main difference in Comparative Example 4 is that the cationic surfactant dodecyl trimethyl ammonium bromide is added in step S11.

[0099] Comparative Example 5

[0100] Compared with Example 1, the main difference in Comparative Example 5 is that sodium dodecyl sulfate, an anionic surfactant, is added in step S11.

[0101] Comparative Example 6

[0102] Compared with Example 1, the main difference in Comparative Example 6 is that no surfactant is added in step S11.

[0103] The product property test results of the high-strength wear-resistant ABS materials prepared in Examples 1-9 and Comparative Examples 1-6 of the present invention are shown in Table 1; the wear amount is judged by weighing the mass difference before and after wear according to the GB / T23988-2009 standard, and the bonding strength is judged by observing whether cracks appear according to the GB / T12610-90 standard; the test conditions, test methods and test results of tensile strength, elongation at break, flexural modulus, hardness and notched impact are shown in Table 1 according to the ASTM standard.

[0104] Table 1: Performance test of ABS composites prepared in Examples 1-9 and Comparative Examples 1-6

[0105]

[0106] As can be seen from Table 1, the tensile strength, surface hardness and wear resistance of the ABS composite material have been significantly improved; from the data comparison in the table, it can be known that when no surfactant is added or an ionic surfactant is used, the wear resistance of the material is significantly reduced, while when the added surfactant is a non-ionic surfactant, the wear-resistant agent polytetrafluoroethylene can form covalent bonds on the surface after surface activation treatment by the non-ionic surfactant, and water-soluble polymers can be introduced, which can well overcome the disadvantages of poor solubility and poor dispersibility of polytetrafluoroethylene. The surface-treated polytetrafluoroethylene can, through the compatibility of compatibilizers polymethyl methacrylate grafted maleic anhydride and styrene-maleic anhydride copolymer and the interaction force, interfacial bonding force and hydrogen bond formed between the methyl methacrylate grafted ABS molecules, make the wear-resistant agent more uniformly and fully dispersed in the resin, improve its combination with the polymer matrix, and thus can fully exert the enhancement effect on the mechanical properties, greatly improving the wear resistance of the polymer as a whole; after the hindered phenol antioxidant and plasticizer are added to the ABS system, a good dispersion effect is formed in the ABS system, and it has a good enhancement effect and antioxidant ability on the ABS system, improving the good performance of the material to maintain gloss without oxidation for a long time. Therefore, a composite ABS material with excellent characteristics of high temperature resistance, corrosion resistance and high strength and wear resistance is prepared.

[0107] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-strength and wear-resistant ABS material, characterized by: The ABS material comprises the following raw materials in parts by weight: 60-80 parts of methyl methacrylate grafted ABS, 3-5 parts of plasticizer, 1-7 parts of surfactant, 0.1-0.7 parts of flame retardant, 1-5 parts of compatibilizer, 3-5 parts of wear-resistant agent and 0.2-1 parts of antioxidant.

2. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The preparation method of the methyl methacrylate grafted ABS is as follows: S1. Accurately weigh 15-20 parts by weight of ABS resin and add it into a four-necked round-bottom flask with a stirrer and a condenser, and add 100-200 parts by weight of toluene for standby use; S2, weigh 7-8 parts by weight of initiator and 10-13 parts by weight of methyl methacrylate to prepare a mixed solution of monomer and initiator, add it into a constant pressure dropping funnel and set aside; S3. Under nitrogen protection, heat the four-necked round-bottom flask to a set temperature to completely dissolve the ABS resin, and then drop the mixed solution of the monomer and the initiator into the four-necked round-bottom flask twice; S4, after the first dropwise addition is completed, the reaction is kept warm, and then the remaining mixed solution is added dropwise for 0.5 ～ 1h, after the addition is complete, continue to keep warm and react; S5. After the reaction is complete, the mixture is cooled to room temperature, and the product is injected into an ethanol solution that is being vigorously stirred. Precipitation of the product is observed, and a crude product is obtained by suction filtration. The crude product is washed with ethanol to remove excess unreacted methyl methacrylate. S6. The washed crude product is then purified with anhydrous ethanol, and after removing the solvent, it is placed in a vacuum oven for vacuum drying to finally obtain methyl methacrylate grafted ABS.

3. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The plasticizer is dioctyl phthalate, and the wear-resistant agent is polytetrafluoroethylene.

4. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The surfactant is a nonionic surfactant, specifically one or more of alkylphenol polyoxyethylene ether, polyoxyethylene alkyl ether, polyoxyethylene alkylamine and fatty acid polyoxyethylene ester.

5. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The compatibilizer is composed of polymethyl methacrylate grafted with maleic anhydride and styrene-maleic anhydride copolymer.

6. The high-strength and wear-resistant ABS material according to claim 5, characterized in that: The preparation method of polymethyl methacrylate grafted maleic anhydride is as follows: (1) 30 parts by weight of polymethyl methacrylate and 2 to 10 parts by weight of maleic anhydride are mixed, and plasticized for 1 to 2 minutes in a Haake rheometer at a temperature of 140° C. and a rotation speed of 100 rpm to obtain a plasticized material; (2) The plasticized material obtained above was mixed with 0.1 to 0.5 parts by weight of dicumyl peroxide as an initiator, and kneaded in a Haake rheometer at a temperature of 140° C. and a rotation speed of 70 rpm for 2 minutes to obtain polymethyl methacrylate grafted with maleic anhydride.

7. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The flame retardant is one or more of tetraphenyl (bisphenol-A) diphosphate, resorcinol bis (diphenyl) phosphate, toluene diphenyl phosphate, tricresyl phosphate and triphenyl phosphate.

8. The high-strength and wear-resistant ABS material according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 168, antioxidant 264, antioxidant DLTP, 2,6-di-tert-butyl-4-methylphenol, bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide, and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate.

9. A method for preparing a high-strength and wear-resistant ABS material as claimed in any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: S11, weighing methyl methacrylate grafted ABS, plasticizer, surfactant, compatibilizer and wear-resistant agent according to the amount, putting them into a high-speed mixing device for mixing, reducing the mixing speed, and then adding the flame retardant and antioxidant into the mixing device for mixing, raising the temperature, increasing the speed, mixing and stirring to obtain a uniform molten liquid; S12, transferring the uniform molten liquid obtained above into a hopper, cooling it to 40° C., extruding it using a screw extruder, and then cooling and solidifying it on a mold to obtain a high-strength and wear-resistant ABS material.

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