Weather-resistant and reagent-resistant ABS composite material and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a weather-resistant and reagent-resistant ABS (Acrylonitrile Butadiene Styrene) composite material. The composite material is prepared from the following raw materials in parts by weight: 100 parts of ABS (Acrylonitrile Butadiene Styrene) resin, 30 to 50 parts of organic-inorganic compound, 1 to 10 parts of EVA (Ethylene Vinyl Acetate) resin and 0.1 to 1 part of antioxidant. The composite material provided by the invention has excellent toughness and weather resistance, and also has excellent reagent resistance and cold resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular 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 material. After processing, it has good comprehensive performance and is impact-resistant. With the continuous development of science and technology, ABS composite materials are developing towards high performance, environmental protection, functionalization and intelligence. For example, by adding reinforcing materials such as lightweight carbon fiber, the mechanical properties and impact resistance of composite materials can be significantly improved; the promotion of environmentally friendly production processes is conducive to the recycling of resources and the reduction of environmental pollution; functional composite materials show broad application prospects in many fields; and the development of intelligent technology makes ABS composite materials play an important role in the manufacture of complex structural parts. In short, ABS composite materials have become one of the indispensable important materials in modern industry with their excellent performance and wide application fields. Therefore, it is also necessary to develop ABS composite materials with better performance.

[0003] At present, the research is more about improving the toughness of ABS composite materials as much as possible, such as its impact strength. CN107200992A utilizes the excellent performance of graphene, builds it into a spherical structure, with toughening and modifying ABS resin, and improves the heat resistance and stability of the material, although it can toughen and modify ABS resin, but because graphene belongs to inorganic filler, it can effectively improve the impact strength when toughening, but in fact, it is not particularly advantageous to the promotion of tensile strength. In CN101831136B, ABS resin is used as the matrix resin, and the second plastic PETG is introduced. The solubility parameter of PETG is very close to the solubility parameter of ABS, so the compatibility of the two resins is very good, and good compatibility can be achieved without adding compatibilizer. In this formulation system, PETG provides good tensile strength (general PETG tensile strength can reach 53MPa, and the tensile strength of ABS resin is 42MPa), and PETG plastic, ABS resin, and toughening agent provide good impact strength. But the tensile strength of the final composite material is far from enough. The above technologies respectively use inorganic fillers or other resins as plasticizers to increase the toughness of ABS composite materials, but the increase in its toughness is extremely limited, and inorganic fillers may hinder the movement of molecular chains at low temperatures, resulting in reduced cold resistance of the composite materials. Other resin toughening agents cannot effectively increase the weather resistance and solvent resistance of the composite materials.

[0004] Therefore, there is an urgent need for a weather-resistant and reagent-resistant ABS composite material that has higher toughness and 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 as well as excellent reagent resistance and cold resistance.

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

[0007] In a first aspect, the present invention provides a weather-resistant and reagent-resistant ABS composite material. 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.

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

[0009] (1) premixing a polyolefin elastomer and an inorganic filler and then melt-extruding the mixture to obtain an organic-inorganic intermediate;

[0010] (2) The organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide and water are mixed, and then refluxed at 70-90° C. for 1-3 hours, filtered, the solid phase is washed with water, and naturally air-dried to constant weight to obtain an organic-inorganic composite.

[0011] ABS has excellent toughness. The polyacrylonitrile segments in ABS make ABS materials resistant to reagents during long-term storage, especially poor in oil resistance. The inventors of the present invention have found through research that the specific organic-inorganic composite material in the present invention can better increase the reagent resistance and toughness of the ABS composite material. On the one hand, it may be because the organic-inorganic composite material 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 segments in the organic-inorganic composite material can better form a branched network in the ABS melt, avoiding the defect of poor reagent resistance. At the same time, 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 2.16kg is 1-10g / 10min, for example, 1g / 10min, 2g / 10min, 3g / 10min, 4g / 10min, 5g / 10min, 6g / 10min, 7g / 10min, 8g / 10min, 9g / 10min, 10g / 10min, and preferably 5g / 10min.

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

[0015] Furthermore, the average particle size of the magnesium aluminum hydrotalcite is 0.1-2 microns, for example, 0.1 microns, 0.4 microns, 0.6 microns, 1 micron, 1.5 microns, 2 microns, preferably 0.5-1 micron, and more preferably 0.6 micron.

[0016] The magnesium aluminum hydrotalcite in the present invention can be obtained commercially, for example, 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 overall performance of the final composite material is better, which may be because magnesium aluminum hydrotalcite has a specific layered structure and can play a better barrier role when dispersed in the system.

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

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

[0020] Furthermore, in step (1), the conditions for melt extrusion include: adding the premixed material into a twin-screw extruder, the screw aspect ratio is 40:1, the screw speed is 200-300 rpm, 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] Furthermore, in step (2), the weight ratio of the organic-inorganic intermediate to divinylbenzene is 100:(1.5-5), for example, 100:1.5, 100:1.8, 100:2, 100:2.5, 100:3, 100:4, 100:5, preferably 100:(3-3.5).

[0022] Furthermore, in step (2), the weight ratio of the organic-inorganic intermediate to acrylonitrile is 100:(30-40), for example, 100:30, 100:35, or 100:40.

[0023] Furthermore, in step (2), the weight ratio of the organic-inorganic intermediate to benzoyl peroxide is 100:(0.1-1), for example, 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] Furthermore, in step (2), the weight ratio of the organic-inorganic intermediate to water is 100:(1000-2000), for example, 100:1000, 100:1200, 100:1400, 100:1500, 100:1800, 100:2000, preferably 100:(1200-1500).

[0025] In the present invention, the solid phase is washed with water, which is a conventional operation method in the art. Generally, the solid phase is washed 3-5 times, and the present invention will not elaborate on it.

[0026] Furthermore, 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] Furthermore, the raw materials of the composite material include: 100 parts of ABS resin, 38 parts of organic-inorganic composite material, 6.2 parts of EVA resin, and 0.3 parts of antioxidant.

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

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

[0030] In the present 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 inclusive structure, which enables the system to form a micro-network structure and better improve the toughness of the composite material. However, experiments have found that when the amount of MABS resin added is too high, its toughness is reduced. This may be because when the content of MABS resin is high, a higher phase structure cannot be formed, resulting in a large performance loss of the system and reduced toughness.

[0031] ABS resin is a terpolymer of acrylonitrile, butadiene and styrene, and MABS resin is a copolymer of methyl methacrylate, acrylonitrile, butadiene and styrene. Furthermore, the melt flow rate of the ABS resin and the 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 the present invention, using two ABS resins and MABS resins with a specific difference in melt flow rates can better increase the toughness, which may be because the ABS resin and MABS resin with the specific difference in melt flow rates can be better mixed and uniformly mixed to achieve a better synergistic effect.

[0033] Furthermore, 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 the present invention can be obtained from the market. Preferably, the ABS resin is ABS Zhenjiang Chimei PA-757K, and its melt flow rate at 220° C. and 10.0 kg is 18 g / 10 min.

[0035] Furthermore, 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 can be obtained from the market. Preferably, the MABS resin is StarexTX-0520T, and its melt flow rate at 220° C. and 10.0 kg is 15 g / 10 min.

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

[0038] Furthermore, the melt flow rate of the EVA resin at 190° C. and 2.16 kg is 1-5 g / 10 min, for example, 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, and preferably 2-3 g / 10 min.

[0039] The EVA resin in the present invention can be obtained commercially, and its preferred model is 7350M, the content of vinyl acetate 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 the use of organic-inorganic composites can increase the toughness, reagent resistance and weather resistance of composite materials to a certain extent, it may be because the inorganic fillers in the organic-inorganic composites can restrain the movement of the rubber ABS resin segments in a 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 they can be inserted into the ABS resin and the organic-inorganic composites to increase the spacing between the molecular chains, making it easier for the molecular chains to move at low temperatures. On the other hand, they can synergize with the polyolefin elastomer to cover the ABS resin and the inorganic filler, and form an island structure in the system, which can also show good toughness at low temperatures, thereby improving the cold resistance of the composite material.

[0041] Furthermore, 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 a second aspect, the present invention provides a method for preparing the weather-resistant and reagent-resistant ABS composite material according to the first aspect of the present invention, the preparation method comprising:

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

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

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

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

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

[0048] The use of a specific organic-inorganic composite and ABS resin in the present invention can not only increase the toughness of the composite material, but also increase the weather resistance and reagent 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. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

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

[0052] The preparation method of the organic-inorganic composite comprises: (1) pre-mixing 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 80° C. for 2 hours, filtering, washing the solid phase with water for 4 times, and naturally air-drying the mixture to a constant weight to obtain an organic-inorganic composite;

[0053] In step (1), the model of the polyolefin elastomer is Dow POE7447, and its melt flow rate at 190°C and 2.16kg is 5g / 10min; 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.; the weight ratio of the polyolefin elastomer to the inorganic filler is 100:45; the premixing conditions include: the stirring speed is 1200r / min, and the stirring time is 5min; the melt extrusion conditions include: adding the premixed materials into a twin-screw extruder, the screw aspect ratio is 40:1, the screw speed is 240rpm, the melt extrusion zone temperature is 125°C, the zone temperature is 145°C, the zone temperature is 160°C, the zone temperature is 180°C, and the zone temperature 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 resin is selected from a combination of ABS resin and MABS resin; the weight ratio of ABS resin to MABS resin is 100:28; the model of ABS resin is ABS Zhenjiang Chimei PA-757K, and its melt flow rate at 220°C and 10.0kg is 18g / 10min; the model of MABS resin is StarexTX-0520T, and its melt flow rate at 220°C and 10.0kg is 15g / 10min;

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

[0057] The antioxidant is antioxidant 1010;

[0058] The preparation method of the ABS composite material comprises: S1 premixing ABS resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premix; S2 using a twin-screw extruder to melt-blend, extrude, cool and granulate the premix to obtain the ABS composite material;

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

[0060] In step S2: the conditions for melt blending extrusion include: 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, and the temperature of zone 5 is 212°C; the rotation speed is 120 rpm.

[0061] Example 2

[0062] 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, 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 comprises: (1) pre-mixing a polyolefin elastomer and an inorganic filler and then melt-extruding to obtain an organic-inorganic intermediate; (2) mixing the organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide and water, and then refluxing the mixture at 90° C. for 1.5 hours, filtering, washing the solid phase with water for 4 times, and naturally air-drying the mixture to constant weight to obtain an 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 2.16kg is 5g / 10min; the inorganic filler is magnesium aluminum hydrotalcite, and its average particle size is 0.6 microns, which 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 premixing conditions include: the stirring speed is 1500r / min, and the stirring time is 8min; the melt extrusion conditions include: adding the premixed materials into a twin-screw extruder, the screw aspect ratio is 40:1, the screw speed is 300rpm, the melt extrusion zone temperature is 125°C, the zone temperature is 145°C, the zone temperature is 160°C, the zone temperature is 180°C, and the zone temperature 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 is selected from a combination of ABS resin and MABS resin; the weight ratio of ABS resin to MABS resin is 100:30; the model of ABS resin is ABS Zhenjiang Chimei PA-757K, and its melt flow rate at 220°C and 10.0kg is 18g / 10min; the model of MABS resin is StarexTX-0520T, and its melt flow rate at 220°C and 10.0kg is 15g / 10min;

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

[0068] The antioxidant is antioxidant 1010;

[0069] The preparation method of the ABS composite material comprises: S1 premixing ABS resin, organic-inorganic composite, EVA resin and antioxidant in a mixer to obtain a premix; S2 using a twin-screw extruder to melt-blend, extrude, cool and granulate the premix to obtain the ABS composite material;

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

[0071] In step S2, the conditions for melt blending and extrusion include: the temperature of zone 1 is 200°C, the temperature of zone 2 is 220°C, the temperature of zone 3 is 230°C, the temperature of zone 4 is 230°C, and the temperature of zone 5 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 comprises: (1) premixing a polyolefin elastomer and an inorganic filler and then melt-extruding the mixture 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 embodiment provides a weather-resistant and reagent-resistant ABS composite material. The raw materials of the composite material include, by weight: 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 μm, purchased from Kaisima (Dandong) High-tech Materials Technology Co., Ltd.;

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

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

[0083] The antioxidant is antioxidant 1010;

[0084] The preparation method of the ABS composite material comprises: S1 premixing ABS resin, polyolefin elastomer, inorganic filler, EVA resin and antioxidant in a mixer to obtain a premix; S2 using a twin-screw extruder to melt-blend, extrude, cool and granulate the premix to obtain the ABS composite material;

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

[0086] In step S2: the conditions for melt blending extrusion include: 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, and the temperature of zone 5 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 series resin is selected from ABS resin, and the model of the ABS resin is ABS Zhenjiang Chimei 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 is selected from MABS resin. The model of the MABS resin is Starex TX-0520T, and the melt flow rate thereof 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 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 cantilever beam notched impact strength is tested in accordance with GB / T1843.2-1996;

[0101] 2. After conditioning the composite material at -30°C for 4 hours, test its tensile strength according to GB / T1040.2-2006 and test its cantilever beam notched impact strength according to GB / T1040.2-2006;

[0102] 3. The composite material was taken out after being immersed in white oil for 7 days, and its tensile strength was tested according to GB / T1040.2-2006, and its cantilever beam notched impact strength was tested according to GB / T1040.2-2006.

[0103] 4. The composite material was taken out after being immersed in acetic acid for 7 days, and its tensile strength was tested according to GB / T1040.2-2006, and its cantilever beam notched impact strength was tested according to GB / T1040.2-2006.

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

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

[0106] Table 1 Performance test results

[0107]

[0108]

[0109] It can be seen from the above performance test results that the composite materials in Examples 1-2 have excellent toughness, weather resistance, reagent resistance and cold resistance, especially the comprehensive performance of Example 1 is the most outstanding. It is speculated that this is because the specific organic-inorganic composite material and ABS resin in the present invention, and the EVA resin, ABS resin and organic-inorganic composite material can avoid the defect of reduced cold resistance caused by the organic-inorganic composite material; while the comparative example did not adopt the necessary technical solution, resulting in its corresponding performance test being significantly worse than the embodiment. The organic-inorganic composite in Comparative Example 1 does not contain polymerized segments formed by divinylbenzene and acrylonitrile, and the toughness, reagent resistance and weather resistance of the final composite material are all reduced; the inorganic filler in Comparative Example 2 is Degussa fumed silica R972, and the toughness, reagent resistance and weather resistance of the final composite material are all reduced, and the cold resistance is slightly reduced; in Comparative Example 3, the polyolefin elastomer is not prepared together with the inorganic filler and other components into an organic-inorganic composite, and the toughness, reagent resistance and weather resistance of the final composite material are all severely reduced, and the cold resistance is reduced to a certain extent; Comparative Examples 1-3 illustrate that the present invention requires the use of a specific organic-inorganic composite to improve the comprehensive performance of the composite material. In Comparative Example 4, only ABS resin was used as the ABS resin, and the toughness of the composite material finally obtained was reduced. In Comparative Example 5, only MABS resin was used as the ABS resin, and the toughness of the composite material finally obtained was reduced, and the weather resistance of the composite material was also reduced to a certain extent. Although ABS resin and MABS resin were used in Comparative Example 6, the proportion of MABS resin was too high, and the toughness of the composite material finally reduced slightly. Through 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 synergize with each other to increase the toughness of the final product; in Comparative Example 7, no EVA resin was used, and the cold resistance of the composite material finally reduced, 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 solution defined in the present invention for its technical effect.

[0110] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection 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 parts of antioxidant; Wherein, the preparation method of 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) The organic-inorganic intermediate, divinylbenzene, acrylonitrile, benzoyl peroxide and water are mixed, and then refluxed at 70-90° C. for 1-3 hours, filtered, the solid phase is washed with water, and naturally air-dried to constant weight to obtain an organic-inorganic composite.

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; the inorganic filler is selected from at least one of graphene, magnesium aluminum hydrotalcite, silica, alumina, glass fiber and carbon fiber; 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 and a stirring time of 3-10 min; the melt extrusion conditions include: adding the premixed material into a twin-screw extruder, a screw length-to-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); 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 ABS resin is selected from a combination of ABS resin and MABS resin.

6. The composite material according to claim 5, characterized in that The weight ratio of the ABS resin to the MABS resin is 100:(20-50).

7. The composite material according to claim 5, characterized in that The melt flow rate of the ABS resin and the MABS resin at 220° C. and 10.0 kg is 0-10 g / 10 min.

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

9. The composite material according to any one of claims 1 to 8, characterized in that Furthermore, 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.

10. A method for preparing the weather-resistant and reagent-resistant ABS composite material according to any one of claims 1 to 9, the method comprising: S1 premixes 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.

Images