A weather-resistant and reagent-resistant ABS composite material and its preparation method

Abstract

The present invention belongs to the technical field of polymer materials, and particularly relates to a weather-resistant and reagent-resistant ABS composite material. By weight, the raw materials of the composite material include: 100 parts of an ABS resin system, 30-50 parts of an organic-inorganic composite, 1-10 parts of an EVA resin, and 0.1-1 part of an antioxidant. The composite material of the present invention has excellent toughness and weather resistance, and also has excellent reagent resistance and cold resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a weather-resistant and reagent-resistant ABS composite material and a preparation method thereof. Background Art

[0002] ABS material is a widely used thermoplastic engineering plastic, which has good comprehensive properties and impact resistance after processing. With the continuous development of technology, ABS composite materials are developing towards high performance, environmental protection, functionality and intelligence. For example, by adding reinforcing materials such as lightweight carbon fibers, the mechanical properties and impact resistance of the composite material can be significantly improved; the promotion of environmentally friendly production processes helps the recycling of resources and reduces environmental pollution; functional composite materials show broad application prospects in many fields; and the development of intelligent technologies enables ABS composite materials to play an important role in the manufacture of complex structural parts. In short, ABS composite materials, with their excellent properties and wide application fields, have become an indispensable important material in modern industry. Therefore, it is also necessary to develop ABS composite materials with better performance.

[0003] At present, more research has been done on improving the toughness of ABS composite materials as much as possible, such as their impact strength. CN107200992A uses the excellent properties of graphene to construct it into a spherical structure to toughen and modify ABS resin and improve the heat resistance and stability of the material. Although it can toughen and modify ABS resin, since graphene belongs to an inorganic filler, it can effectively improve the impact strength during toughening, but it does not have a particularly obvious advantage in improving the tensile strength. In CN101831136B, with ABS resin as the matrix resin, the second plastic PETG is introduced. The solubility parameter of PETG is very close to that of ABS, so the compatibility of the two resins is very good, and a compatibilizer can be not added to achieve good compatibility. In this formulation system, PETG provides good tensile strength (generally, the tensile strength of PETG can reach 53 MPa, and the tensile strength of ABS resin is 42 MPa), while PETG plastic, ABS resin, and toughening agent provide good impact strength. However, the tensile strength of the final composite material is far from enough. The above technologies use inorganic fillers or other resins as plasticizers to increase the toughness of ABS composite materials, but the increase in their toughness is extremely limited, and inorganic fillers may hinder the movement of molecular chains at low temperatures, resulting in a decrease in the cold resistance of the composite material, and other resin toughening agents cannot effectively improve the weather resistance and solvent resistance of the composite material.

[0004] Therefore, there is an urgent need for a weather-resistant and reagent-resistant ABS composite material. While having higher toughness, it also has excellent cold resistance. Summary of the Invention

[0005] The object of the present invention is to provide a weather-resistant and reagent-resistant ABS composite material, which has excellent toughness and weather resistance, and also has excellent reagent resistance and cold resistance.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] In the first aspect, the present invention provides a weather-resistant and reagent-resistant ABS composite material. By weight, the raw materials of the composite material include: 100 parts of an ABS-based resin, 30-50 parts of an organic-inorganic composite, 1-10 parts of an EVA resin, and 0.1-1 part of an antioxidant.

[0008] The preparation method of the organic-inorganic composite includes:

[0009] (1) Pre-mix the polyolefin elastomer and the inorganic filler and then melt-extrude to obtain an organic-inorganic intermediate;

[0010] (2) Take the organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide and water, mix them, then carry out a reflux reaction at 70-90 °C for 1-3 hours, filter, wash the solid phase with water, and air-dry naturally to constant weight to obtain the organic-inorganic composite.

[0011] ABS has excellent toughness. The polyacrylonitrile chain segment in ABS makes the ABS-based material resistant to reagents during long-term storage, especially with poor oil resistance. The inventors in the present invention have found through research that the specific organic-inorganic composite in the present invention can better improve the reagent resistance and toughness of the ABS composite material. On the one hand, it may be because the organic-inorganic composite in the present invention can be better dispersed in the system, and small molecule solvents are difficult to penetrate into the matrix through the two-phase interface, resulting in a better barrier effect. On the other hand, it may be because the organic chain segments in the organic-inorganic composite can better form a branched network in the ABS melt, avoiding the defect of poor reagent resistance, and the formed branched network may also form a cage structure, further increasing its toughness.

[0012] Furthermore, in step (1): the melt flow rate of the polyolefin elastomer at 190 °C and 2.16 kg is 1-10 g / 10 min, for example, 1 g / 10 min, 2 g / 10 min, 3 g / 10 min, 4 g / 10 min, 5 g / 10 min, 6 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, and preferably 5 g / 10 min.

[0013] The polyolefin elastomer in the present invention can be obtained commercially. For example, the model of the polyolefin elastomer is Dow POE 7447, and its melt flow rate at 190 °C and 2.16 kg is 5 g / 10 min.

[0014] Further, in step (1): the inorganic filler is selected from at least one of graphene, magnesium aluminum hydrotalcite, silica, alumina, glass fiber, and carbon fiber, and preferably magnesium aluminum hydrotalcite.

[0015] Further, the average particle size of the magnesium aluminum hydrotalcite is 0.1 - 2 μm, such as 0.1 μm, 0.4 μm, 0.6 μm, 1 μm, 1.5 μm, 2 μm, preferably 0.5 - 1 μm, and more preferably 0.6 μm.

[0016] The magnesium aluminum hydrotalcite in the present invention can be obtained commercially. For example, it is purchased from Kaisima (Dandong) High-Tech Materials Technology Co., Ltd.

[0017] In the present invention, further research found that when the inorganic filler is magnesium aluminum hydrotalcite, the comprehensive performance of the final composite material is better. This may be because magnesium aluminum hydrotalcite has a specific layered structure and can better play a barrier role when dispersed in the system.

[0018] Further, in step (1), the weight ratio of the polyolefin elastomer to the inorganic filler is 100:(30 - 60), such as 100:30, 100:40, 100:50, 100:60, preferably 100:(40 - 50).

[0019] Further, in step (1), the conditions for the premixing include: the stirring speed is 1200 - 1500 r / min, and the stirring time is 3 - 10 min.

[0020] Further, in step (1), the conditions for the melt extrusion include: adding the premixed material into a twin-screw extruder, the screw length-diameter ratio is 40:1, the screw rotation speed is 200 - 300 rpm, and the melt extrusion temperature is 120 - 180 °C. Preferably, the temperature of zone 1 is 125 °C, the temperature of zone 2 is 145 °C, the temperature of zone 3 is 160 °C, the temperature of zone 4 is 180 °C, and the temperature of zone 5 is 165 °C.

[0021] Further, in step (2), the weight ratio of the organic-inorganic intermediate to divinylbenzene is 100:(1.5 - 5), such as 100:1.5, 100:1.8, 100:2, 100:2.5, 100:3, 100:4, 100:5, preferably 100:(3 - 3.5).

[0022] Further, in step (2), the weight ratio of the organic-inorganic intermediate to acrylonitrile is 100:(30 - 40), such as 100:30, 100:35, 100:40.

[0023] Further, in step (2), the weight ratio of the organic-inorganic intermediate to benzoyl peroxide is 100:(0.1 - 1), such as 100:0.1, 100:0.3, 100:0.5, 100:0.7, 100:0.8, 100:0.9, 100:1, preferably 100:(0.5 - 0.6).

[0024] Further, in step (2), the weight ratio of the organic-inorganic intermediate to water is 100:(1000 - 2000), such as 100:1000, 100:1200, 100:1400, 100:1500, 100:1800, 100:2000, preferably 100:(1200 - 1500).

[0025] In the present invention, the washing method of using water to wash the solid phase is a conventional operation means in the art, generally washing 3 - 5 times, and the present invention will not elaborate on it too much.

[0026] Further, the raw materials of the composite material include: 100 parts of ABS resin, 35 - 40 parts of organic-inorganic composite, 5 - 8 parts of EVA resin, and 0.2 - 0.3 parts of antioxidant.

[0027] Further, the raw materials of the composite material include: 100 parts of ABS resin, 38 parts of organic-inorganic composite, 6.2 parts of EVA resin, and 0.3 parts of antioxidant.

[0028] The ABS resin is a copolymer containing acrylonitrile segments, butadiene segments and styrene segments. Further, the ABS resin is selected from the combination of ABS resin and MABS resin.

[0029] Further, the weight ratio of the ABS resin to the MABS resin is 100:(20 - 50), such as 100:20, 100:30, 100:40, 100:50, preferably 100:(25 - 30).

[0030] In this invention, ABS resin and MABS resin are used together as the matrix resin, which can better increase the toughness of the composite. This may be because the addition of MABS resin makes the processing system have better fluidity. MABS resin has a certain inclusion structure, enabling the system to form a micro-network structure and better improve the toughness of the composite material. However, through experiments, it is found that when the addition amount of MABS resin is too high, its toughness decreases instead. This may be because when the content of MABS resin is relatively high, a higher phase structure cannot be formed, resulting in a large loss of the system's performance and a decrease in toughness.

[0031] ABS resin is a terpolymer of acrylonitrile, butadiene, and styrene. MABS resin is a copolymer of methyl methacrylate, acrylonitrile, butadiene, and styrene. Further, the melt flow rate of the ABS resin and MABS resin at 220 °C and 10.0 kg is 0 - 10 g / 10 min, for example, 0 g / 10 min, 1 g / 10 min, 2 g / 10 min, 3 g / 10 min, 4 g / 10 min, 5 g / 10 min, 6 g / 10 min, 7 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, and preferably 1 - 5 g / 10 min.

[0032] In this invention, using ABS resin and MABS resin with a specific difference in melt flow rate can better increase their toughness. This may be because the ABS resin and MABS resin with this specific difference in melt flow rate can be better mixed evenly and achieve a better synergistic effect.

[0033] Further, the melt flow rate of the ABS resin at 220 °C and 10.0 kg is 15 - 25 g / 10 min, for example, 15 g / 10 min, 18 g / 10 min, 20 g / 10 min, 23 g / 10 min, 25 g / 10 min, and preferably 16 - 20 g / 10 min.

[0034] The ABS resin in this invention can be obtained commercially. Preferably, the model of the ABS resin is ABS Zhenjiang Qimei PA - 757K, and its melt flow rate at 220 °C and 10.0 kg is 18 g / 10 min.

[0035] Further, the melt flow rate of the MABS resin at 220 °C and 10.0 kg is 10 - 20 g / 10 min, for example, 10 g / 10 min, 12 g / 10 min, 15 g / 10 min, 17 g / 10 min, 18 g / 10 min, 20 g / 10 min, and preferably 13 - 16 g / 10 min.

[0036] The MABS resin in the present invention is commercially available. Preferably, the model of the MABS resin is Starex TX-0520T, and its melt flow rate at 220 °C and 10.0 kg is 15 g / 10 min.

[0037] The EVA resin is ethylene-vinyl acetate copolymer. Further, the content of vinyl acetate chain segments in the EVA resin is 10-30 wt%, preferably 15-20 wt%.

[0038] Further, the melt flow rate of the EVA resin at 190 °C and 2.16 kg is 1-5 g / 10 min, such as 1 g / 10 min, 1.5 g / 10 min, 2.5 g / 10 min, 3 g / 10 min, 3.5 g / 10 min, 4 g / 10 min, 5 g / 10 min, preferably 2-3 g / 10 min.

[0039] The EVA resin in the present invention is commercially available. Preferably, its model is 7350M, the content of vinyl acetate chain segments is 18 wt%, and the melt flow rate at 190 °C and 2.16 kg is 2.5 g / 10 min.

[0040] The inventors found that although using organic-inorganic composites can increase the toughness, reagent resistance and weather resistance of the composite material to a certain extent, it may be because the inorganic fillers in the organic-inorganic composites can restrict the movement of the ABS resin segments in the cold state, resulting in a decrease in its cold resistance. It may be because the segments in the EVA resin can interact well with the acrylonitrile segments in the organic-inorganic composites, and it can penetrate into the ABS resin and the organic-inorganic composites to increase the distance between molecular chains. At low temperatures, the molecular chains are more likely to move. On the other hand, its synergistic effect with polyolefin elastomers can coat the ABS resin and the inorganic fillers, and form a sea-island structure in the system, and can also show good toughness at low temperatures, improving the cold resistance of the composite material.

[0041] Further, the antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 2246, antioxidant 264, antioxidant 300, antioxidant 442, antioxidant BHT and antioxidant DSTP.

[0042] In the second aspect, the present invention provides a preparation method of the weather-resistant and reagent-resistant ABS composite material described in the first aspect of the present invention. The preparation method includes:

[0043] S1 Premix the ABS resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premix.

[0044] In S2, a twin-screw extruder is used to melt, blend, extrude, cool, and pelletize the premix to obtain an ABS composite material.

[0045] Furthermore, in step S1, the conditions for premixing are: the rotational speed is 1000 - 2000 rpm, and the time is 1 - 10 min.

[0046] Furthermore, in step S2, the conditions for melt blending and extrusion include: the temperature of zone 1 is 190 - 200 °C, the temperature of zone 2 is 210 - 220 °C, the temperature of zone 3 is 225 - 230 °C, the temperature of zone 4 is 225 - 230 °C, the temperature of zone 5 is 210 - 220 °C; the rotational speed is 100 - 200 rpm.

[0047] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0048] In the present invention, the use of a specific organic-inorganic composite in combination with an ABS resin can not only increase the toughness of the composite material, but also increase the weather resistance and chemical resistance of the composite material. At the same time, the use of EVA resin, ABS resin, and organic-inorganic composite in the present invention can avoid the defect of reduced cold resistance caused by the organic-inorganic composite. Specific Embodiments

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0050] Example 1

[0051] This example provides a weather-resistant and chemical-resistant ABS composite material. By weight, the raw materials of the composite material include: 100 parts of an ABS resin, 38 parts of an organic-inorganic composite, 6.2 parts of an EVA resin, and 0.3 parts of an antioxidant;

[0052] The preparation method of the organic-inorganic composite includes: (1) pre-mixing a polyolefin elastomer and an inorganic filler and then performing melt extrusion to obtain an organic-inorganic intermediate; (2) taking the organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide, and water for mixing, and then carrying out a reflux reaction at 80 °C for 2 hours, filtering, washing the solid phase with water 4 times, and naturally drying to constant weight to obtain the organic-inorganic composite;

[0053] In step (1): The polyolefin elastomer is Dow POE7447, and its melt flow rate at 190°C and 2.16 kg is 5 g / 10 min; the inorganic filler is magnesium aluminum hydrotalcite, with an average particle size of 0.6 microns, purchased from Kelsma (Dandong) High-Tech Materials Technology Co., Ltd.; the weight ratio of the polyolefin elastomer to the inorganic filler is 100:45; the conditions for premixing include: the stirring speed is 1200 r / min and the stirring time is 5 min; the conditions for melt extrusion include: adding the premixed material into a twin-screw extruder, with a screw length-diameter ratio of 40:1, a screw rotation speed of 240 rpm, the temperature of the first zone for melt extrusion is 125°C, the second zone is 145°C, the third zone is 160°C, the fourth zone is 180°C, and the fifth zone is 165°C;

[0054] In step (2): The weight ratio of the organic-inorganic intermediate to divinylbenzene is 100:3.25; the weight ratio of the organic-inorganic intermediate to acrylonitrile is 100:35; the weight ratio of the organic-inorganic intermediate to benzoyl peroxide is 100:0.5; the weight ratio of the organic-inorganic intermediate to water is 100:1200;

[0055] The ABS-based resin is selected from the combination of ABS resin and MABS resin; the weight ratio of ABS resin to MABS resin is 100:28; the model of the ABS resin is ABS Zhenjiang Qimei PA-757K, and its melt flow rate at 220°C and 10.0 kg is 18 g / 10 min; the model of the MABS resin is Starex TX-0520T, and its melt flow rate at 220°C and 10.0 kg is 15 g / 10 min;

[0056] The model of the EVA resin is 7350M, the content of the vinyl acetate chain segment is 18 wt%, and its melt flow rate at 190°C and 2.16 kg is 2.5 g / 10 min;

[0057] The antioxidant is antioxidant 1010;

[0058] The preparation method of the ABS composite material includes: S1 Premixing the ABS-based resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premixed material; S2 Using a twin-screw extruder to melt-blend, extrude, cool and pelletize the premixed material to obtain the ABS composite material;

[0059] In step S1: The conditions for premixing are: the rotation speed is 1500 rpm and the time is 5 min;

[0060] In step S2, the conditions for melt blending and extrusion are as follows: the temperature of zone 1 is 195°C, the temperature of zone 2 is 215°C, the temperature of zone 3 is 225°C, the temperature of zone 4 is 230°C, the temperature of zone 5 is 212°C; the rotational speed is 120 rpm.

[0061] Example 2

[0062] A weather-resistant and reagent-resistant ABS composite material. By weight, the raw materials of the composite material include: 100 parts of ABS resin system, 42 parts of organic-inorganic composite, 8 parts of EVA resin, and 0.3 parts of antioxidant;

[0063] The preparation method of the organic-inorganic composite includes: (1) Pre-mixing the polyolefin elastomer and the inorganic filler and then performing melt extrusion to obtain an organic-inorganic intermediate; (2) Taking the organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide and water for mixing, and then carrying out a reflux reaction at 90°C for 1.5 hours, filtering, washing the solid phase with water 4 times, and naturally drying to constant weight to obtain the organic-inorganic composite;

[0064] In step (1): The model of the polyolefin elastomer is Dow POE 7447, and its melt flow rate at 190°C and 2.16 kg is 5 g / 10 min; the inorganic filler is magnesium aluminum hydrotalcite, its average particle size is 0.6 microns, and it is purchased from Kaisima (Dandong) High-tech Materials Technology Co., Ltd.; the weight ratio of the polyolefin elastomer to the inorganic filler is 100:50; the conditions for pre-mixing include: the stirring speed is 1500 r / min, and the stirring time is 8 min; the conditions for melt extrusion include: adding the pre-mixed material into a twin-screw extruder, the screw length-diameter ratio is 40:1, the screw rotational speed is 300 rpm, the temperature of zone 1 for melt extrusion is 125°C, the temperature of zone 2 is 145°C, the temperature of zone 3 is 160°C, the temperature of zone 4 is 180°C, and the temperature of zone 5 is 165°C;

[0065] In step (2): The weight ratio of the organic-inorganic intermediate to divinylbenzene is 100:4; the weight ratio of the organic-inorganic intermediate to acrylonitrile is 100:40; the weight ratio of the organic-inorganic intermediate to benzoyl peroxide is 100:0.5; the weight ratio of the organic-inorganic intermediate to water is 100:1200;

[0066] The ABS resin system is selected from the combination of ABS resin and MABS resin; the weight ratio of ABS resin to MABS resin is 100:30; the model of the ABS resin is ABS Zhenjiang Qimei PA-757K, and its melt flow rate at 220°C and 10.0 kg is 18 g / 10 min; the model of the MABS resin is Starex TX-0520T, and its melt flow rate at 220°C and 10.0 kg is 15 g / 10 min;

[0067] The model of the EVA resin is 7350M, the content of its vinyl acetate chain segment is 18 wt%, and the melt flow rate at 190 °C and 2.16 kg is 2.5 g / 10 min;

[0068] The antioxidant is antioxidant 1010;

[0069] The preparation method of the ABS composite material includes: S1 Premixing the ABS resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premixed material; S2 Using a twin-screw extruder to melt-blend, extrude, cool and pelletize the premixed material to obtain the ABS composite material;

[0070] In step S1: The conditions for premixing are: the rotation speed is 1200 rpm and the time is 5 min;

[0071] In step S2: The conditions for melt-blending extrusion include: the temperature of the first zone is 200 °C, the temperature of the second zone is 220 °C, the temperature of the third zone is 230 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 215 °C; the rotation speed is 150 rpm.

[0072] Comparative Example 1

[0073] The difference between this comparative example and Example 1 is:

[0074] The preparation method of the organic-inorganic composite includes: (1) Pre-mixing the polyolefin elastomer and the inorganic filler and then performing melt extrusion to obtain the organic-inorganic composite.

[0075] Comparative Example 2

[0076] The difference between this comparative example and Example 1 is:

[0077] The inorganic filler is Degussa fumed silica R972.

[0078] Comparative Example 3

[0079] This example provides a weather-resistant and reagent-resistant ABS composite material. By weight, the raw materials of the composite material include: 100 parts of ABS resin, 30 parts of polyolefin elastomer, 8 parts of inorganic filler, 6.2 parts of EVA resin, and 0.3 parts of antioxidant;

[0080] The model of the polyolefin elastomer is Dow POE7447, and its melt flow rate at 190 °C and 2.16 kg is 5 g / 10 min; the inorganic filler is magnesium aluminum hydrotalcite, and its average particle size is 0.6 microns, purchased from Kaisima (Dandong) High-Tech Materials Technology Co., Ltd.;

[0081] The ABS resin system is selected from the combination of ABS resin and MABS resin; the weight ratio of ABS resin to MABS resin is 100:28; the model of the ABS resin is ABS Zhenjiang Qimei PA-757K, and its melt flow rate at 220 °C and 10.0 kg is 18 g / 10 min; the model of the MABS resin is Starex TX-0520T, and its melt flow rate at 220 °C and 10.0 kg is 15 g / 10 min;

[0082] The model of the EVA resin is 7350M, the content of its vinyl acetate chain segment is 18 wt%, and its melt flow rate at 190 °C and 2.16 kg is 2.5 g / 10 min;

[0083] The antioxidant is antioxidant 1010;

[0084] The preparation method of the ABS composite material includes: S1 Premixing the ABS resin system, polyolefin elastomer, inorganic filler, EVA resin and antioxidant in a mixer to obtain a premixed material; S2 Using a twin-screw extruder to melt-blend, extrude, cool and pelletize the premixed material to obtain the ABS composite material;

[0085] In step S1: The conditions for premixing are: the rotation speed is 1500 rpm and the time is 5 min;

[0086] In step S2: The conditions for melt-blending extrusion include: the temperature of the first zone is 195 °C, the temperature of the second zone is 215 °C, the temperature of the third zone is 225 °C, the temperature of the fourth zone is 230 °C, the temperature of the fifth zone is 212 °C; the rotation speed is 120 rpm.

[0087] Comparative Example 4

[0088] The difference between this comparative example and Example 1 is:

[0089] The ABS resin system is selected from ABS resin, the model of the ABS resin is ABS Zhenjiang Qimei PA-757K, and its melt flow rate at 220 °C and 10.0 kg is 18 g / 10 min.

[0090] Comparative Example 5

[0091] The difference between this comparative example and Example 1 is:

[0092] The ABS resin system is selected from MABS resin, the model of the MABS resin is Starex TX-0520T, and its melt flow rate at 220 °C and 10.0 kg is 15 g / 10 min.

[0093] Comparative Example 6

[0094] The difference between this comparative example and Example 1 is:

[0095] The weight ratio of ABS resin to MABS resin is 100:70.

[0096] Comparative Example 7

[0097] The difference between this comparative example and Example 1 is:

[0098] The amount of EVA resin is 0 parts, that is, no EVA resin is added when preparing the composite material.

[0099] Performance testing

[0100] 1. The tensile strength is tested in accordance with GB / T1040.2-2006; the Izod impact strength with notch is tested in accordance with GB / T1843.2-1996;

[0101] 2. After conditioning the composite material at -30°C for 4 hours, its tensile strength is tested in accordance with GB / T1040.2-2006 and its Izod impact strength with notch is tested in accordance with GB / T1040.2-2006;

[0102] 3. After soaking the composite material in white oil for 7 days and then taking it out, its tensile strength is tested in accordance with GB / T1040.2-2006 and its Izod impact strength with notch is tested in accordance with GB / T1040.2-2006.

[0103] 4. After soaking the composite material in acetic acid for 7 days and then taking it out, its tensile strength is tested in accordance with GB / T1040.2-2006 and its Izod impact strength with notch is tested in accordance with GB / T1040.2-2006.

[0104] 5. Tested according to the standard of ASTM D4459-2006, the smaller the △E, the better the weather resistance of the composite material. The test conditions are: continuous irradiation with xenon lamp for 300 hours.

[0105] The test results are shown in Table 1.

[0106] Table 1 Performance test results

[0107]

[0108]

[0109] From the above performance test results, it can be seen that the composite materials in Examples 1-2 have excellent toughness, weather resistance, chemical resistance and cold resistance. In particular, the comprehensive performance of Example 1 is the most prominent. It is speculated that this is because the specific organic-inorganic composite in the present invention and the ABS resin system, and the simultaneous action of the EVA resin, the ABS resin system and the organic-inorganic composite can avoid the defect of reduced cold resistance caused by the organic-inorganic composite. However, in the comparative examples, due to the lack of necessary technical solutions, their performance in the corresponding performance tests is significantly worse than that of the examples. In the organic-inorganic composite of Comparative Example 1, there is no polymer chain segment formed by divinylbenzene and acrylonitrile, resulting in a decrease in the toughness, chemical resistance and weather resistance of the final composite material. In Comparative Example 2, the inorganic filler is Degussa aerosil R972, resulting in a decrease in the toughness, chemical resistance and weather resistance of the final composite material, and a slight decrease in cold resistance. In Comparative Example 3, the polyolefin elastomer, inorganic filler and other components were not jointly prepared into an organic-inorganic composite for use, resulting in a serious decrease in the toughness, chemical resistance and weather resistance of the final composite material, and a certain degree of decrease in cold resistance. Comparative Examples 1-3 illustrate that a specific organic-inorganic composite needs to be used in the present invention to improve the comprehensive performance of the composite material. In Comparative Example 4, only ABS resin was used in the ABS resin system, resulting in a decrease in the toughness of the final composite material. In Comparative Example 5, only MABS resin was used in the ABS resin system, resulting in a decrease in the toughness of the final composite material, and a certain degree of decrease in the weather resistance of the composite material. In Comparative Example 6, although both ABS resin and MABS resin were used in the ABS resin system, the proportion of MABS resin was too high, resulting in a slight decrease in the toughness of the final composite material. From Comparative Examples 4-6, it can be obtained that the use of a specific proportion of ABS resin and MABS resin in the system of the present invention can synergistically increase the toughness of the final product. In Comparative Example 7, no EVA resin was used, resulting in a decrease in the cold resistance of the final composite material, indicating that the use of EVA resin in the present invention can increase the cold resistance of the composite material. The above experimental results further prove the importance of the technical solutions defined in the present invention for its technical effects.

[0110] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A weather-resistant and reagent-resistant ABS composite material, wherein the raw materials of the composite material include, by weight: 100 parts of ABS resin, 30-50 parts of organic-inorganic composite, 1-10 parts of EVA resin, and 0.1-1 part of antioxidant; The method for preparing the organic-inorganic composite comprises: (1) Premixing a polyolefin elastomer and an inorganic filler and then melt-extruding the mixture to obtain an organic-inorganic intermediate; (2) Mixing the organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide, and water, and then refluxing the mixture at 70-90°C for 1-3 hours, filtering, washing the solid phase with water, and air-drying the mixture to a constant weight to obtain an organic-inorganic composite; ABS resin is a combination of ABS resin and MABS resin in a weight ratio of 100: (20-50); The inorganic filler is selected from at least one of graphene, magnesium aluminum hydrotalcite, alumina, glass fiber and carbon fiber; The melt flow rate of ABS resin at 220°C and 10.0 kg is 18 g / 10 min; the melt flow rate of MABS resin at 220°C and 10.0 kg is 15 g / 10 min.

2. The composite material according to claim 1, characterized in that In step (1), the melt flow rate of the polyolefin elastomer at 190° C. and 2.16 kg is 1-10 g / 10 min; and the weight ratio of the polyolefin elastomer to the inorganic filler is 100:(30-60).

3. The composite material according to claim 1, characterized in that In step (1), the premixing conditions include: a stirring speed of 1200-1500 r / min, a stirring time of 3-10 min; the melt extrusion conditions include: adding the premixed material into a twin-screw extruder, a screw length-diameter ratio of 40:1, a screw speed of 200-300 rpm, and a melt extrusion temperature of 120-180°C.

4. The composite material according to claim 1, characterized in that In step (2), the weight ratio of the organic-inorganic intermediate to divinylbenzene is 100:(1.5-5); the weight ratio of the organic-inorganic intermediate to acrylonitrile is 100:(30-40); the weight ratio of the organic-inorganic intermediate to benzoyl peroxide is 100:(0.1-1); and the weight ratio of the organic-inorganic intermediate to water is 100:(1000-2000).

5. The composite material according to claim 1, characterized in that The content of vinyl acetate segments in the EVA resin is 10-30 wt %; and the melt flow rate of the EVA resin at 190° C. and 2.16 kg is 1-5 g / 10 min.

6. The composite material according to any one of claims 1 to 5, characterized in that The antioxidant is selected from at least one of antioxidant 1010, antioxidant 1076, antioxidant 1098, antioxidant 2246, antioxidant 264, antioxidant 300, antioxidant 442, antioxidant BHT and antioxidant DSTP.

7. A method for preparing the weather-resistant and reagent-resistant ABS composite material according to any one of claims 1 to 6, the method comprising: S1. Premixing ABS resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premix; S2 uses a twin-screw extruder to melt-blend, extrude, cool, and granulate the premix to obtain an ABS composite material.

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