Grafted san resins and their use, and heat-resistant abs resins and methods of making and using the same

Abstract

This invention relates to the field of polymers, and discloses a grafted SAN resin, its application in heat-resistant ABS resin, and its preparation method and application. The grafted SAN resin comprises SAN resin and grafted chains, wherein the grafted chains include: heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units; in the grafted SAN resin, the weight ratio of SAN resin, heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units is 40-80:1-6:1-10:0.1-5. The grafted SAN resin provided by this invention, when used to replace SAN resin in ABS resin formulations, produces heat-resistant ABS resins that not only possess excellent heat resistance but also exhibit good compatibility with heat-resistant modifiers, maintaining good mechanical properties. Furthermore, this heat-resistant ABS resin also has a low odor, making it suitable for use in low-odor products such as automobiles.

Description

Technical Field

[0001] This invention relates to the field of polymers, and more specifically to a grafted SAN resin and its applications, and a heat-resistant ABS resin and its preparation method and applications. Background Technology

[0002] Styrene-acrylonitrile-butadiene terpolymer (ABS) is an engineering plastic with excellent comprehensive mechanical properties. It possesses good rigidity, hardness, and processing flow characteristics, as well as high toughness, making it widely used in machinery, electrical, and textile industries. However, the poor heat resistance of ABS resin itself limits its application areas. In recent years, with the rapid development of the automotive and home appliance industries, there has been a growing demand for higher heat resistance in ABS resins. Conventional ABS resins struggle to maintain their rigidity and hardness at temperatures above 100°C. However, the automotive and home appliance industries require ABS resins with high heat resistance, such as for automotive dashboards, grilles, interior and exterior trim, cooler protection bars, and instrument panels; electric water heater components and heating appliance housings; and various beauty and hairdressing instruments. Therefore, there is an urgent need to develop heat-resistant ABS resins.

[0003] For example, CN201811268389.2 discloses a heat-resistant ABS resin and its preparation method. This method includes 80-98 parts of bulk ABS resin, 2-15 parts of a heat-resistant agent, 0.1-0.9 parts of an antioxidant, and 0.1-1 parts of a lubricant, which are then blended in a high-speed mixer and melt-extruded through a twin-screw extruder to prepare heat-resistant ABS material. The heat-resistant ABS resin obtained by this method has good flowability, but its toughness is insufficient, greatly limiting its application areas. CN201910819959.0 discloses a radiation-crosslinkable N-phenylmaleimide copolymer composition and its ABS composite material preparation method. N-phenylmaleimide (N-PMI), triallyl isocyanurate (TAIC), and maleic anhydride (MAH) are copolymerized to obtain a ternary copolymer product, i.e., a heat-resistant modifier. This method solves the problem of limited improvement in polymer heat resistance temperature by existing heat-resistant agents, but its radiation crosslinking conditions are harsh, and the reaction is relatively complex, making it unsuitable for mass production. CN201611111922.5 discloses a high-temperature resistant ABS material and its preparation method. The method includes blending 100 parts ABS resin, 5.5-6.5 parts talc, 5.5-6.5 parts barium sulfate, 20-30 parts ABS heat-resistant modifier, 1.5-2.5 parts antioxidant, 0.5-1.5 parts dispersing lubricant (TAS-2A), and 0.5-1.5 parts titanate coupling agent, followed by co-extrusion using a twin-screw extruder. This method provides an ABS resin that does not affect the material's mechanical properties and is heat-resistant, but its melt index decreases significantly, which is detrimental to processing. CN201610687243.6 discloses a heat-resistant ABS resin composition for improving chemical resistance. This invention relates to a heat-resistant ABS resin for improving chemical resistance, wherein the ABS resin is prepared by co-extrusion using 80-93 parts bulk ABS resin, 3-10 parts heat-resistant modifier, and 4-10 parts PA6 resin as raw materials. The advantages of ABS resin prepared by this method are its high heat distortion temperature, high impact strength, and good chemical resistance. However, problems such as the compatibility of the heat-resistant modifier and PA6 filled in the ABS resin with the matrix material lead to a significant decrease in its rigidity. CN201410831344.7 discloses a high heat-resistant ABS composition, wherein the raw materials are 15-20 parts ethylbenzene, 7.5-8.5 parts rubber, 45-50 parts styrene, 16-19 parts acrylonitrile, 3-6.5 parts heat-resistant structural monomer, and 0.2-0.62 parts maleic anhydride. The raw materials are mixed and then prepared by continuous bulk polymerization. The ABS composition synthesized by this method has a Vicat heat resistance temperature greater than 112°C. Its drawback is that the ABS resin prepared by bulk polymerization has a low resin content and poor toughness.CN201010140376.4 discloses a heat-resistant ABS / PVC alloy and its preparation method. The method comprises 20-80% PVC, 10-70% ABS, 1-3% compatibilizer, 3-6% heat stabilizer, 1-4% lubricant, 0.2-0.6% antioxidant, 0.5-3% heat-resistant modifier, and 1-3% other additives, which are then blended via twin-screw extrusion to prepare the heat-resistant ABS / PVC alloy material. This invention solves the shortcomings of existing heat-resistant modifiers: the large amount of heat-resistant modifier added and the high cost.

[0004] Existing modified formulations of heat-resistant ABS resins are difficult to balance their heat resistance and mechanical properties. Some formulations require increasing the amount of heat-resistant modifier, which greatly reduces the mechanical properties of the heat-resistant ABS resins prepared, limiting their application fields and making it difficult to promote their use. Some formulations maintain the good mechanical properties of ABS resins, but their heat resistance does not meet the application heat resistance conditions. Summary of the Invention

[0005] The purpose of this invention is to overcome the problem of simultaneously achieving high heat resistance and good mechanical properties in existing heat-resistant ABS resins, and to provide a grafted SAN resin and its applications, as well as a heat-resistant ABS resin and its preparation method and applications. The grafted SAN resin provided by this invention is a SAN resin with heat-resistant branches. The heat-resistant ABS resin prepared by replacing SAN resin in ABS resin formulations not only has excellent heat resistance but also good compatibility with heat-resistant modifiers. The heat-resistant modifiers are uniformly dispersed in the ABS resin, allowing it to maintain good mechanical properties. Furthermore, this heat-resistant ABS resin also has a low odor, making it suitable for use in low-odor products such as automobiles.

[0006] To achieve the above objectives, the present invention provides a grafted SAN resin, which includes SAN resin and grafted chains, wherein the grafted chains include: heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units; wherein the weight ratio of SAN resin, heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units in the grafted SAN resin is 40-80:1-6:1-10:0.1-5.

[0007] A second aspect of the present invention provides the application of the grafted SAN resin described herein as an additive in the preparation of heat-resistant ABS resin.

[0008] A third aspect of the present invention provides a heat-resistant ABS resin, comprising, by weight: 40-110 parts grafted SAN resin 18-30 parts of high-polymer ABS powder Heat-resistant modifier 1-30 parts Antioxidant 0.1-5 parts Lubricant 0.1-3 parts; The grafted SAN resin is the grafted SAN resin described in this invention.

[0009] A fourth aspect of this invention provides a method for preparing the heat-resistant ABS resin described herein, the method comprising the following steps: (a) Mix grafted SAN resin, ABS high-adhesion powder, heat-resistant modifier, antioxidant, and lubricant; (b) The mixture obtained in step (a) is melted and then extruded and granulated.

[0010] The fifth aspect of this invention provides a method for preparing the heat-resistant ABS resin described herein, the method comprising the following steps: (1) Mix SAN resin, heat-resistant monomer, styrene, maleic anhydride and initiator to obtain grafted SAN resin premix; (2) Add ABS high-rubber powder, heat-resistant modifier, antioxidant and lubricant to the grafted SAN resin premix in step (1) and continue mixing; (3) The mixture obtained in step (2) is subjected to a melt reaction and then extruded and granulated; The weight ratio of the SAN resin, heat-resistant monomer, styrene, and maleic anhydride is 40-80:1-6:1-10:0.1-5.

[0011] The sixth aspect of the present invention provides a heat-resistant ABS resin prepared by the preparation method described in the present invention.

[0012] The seventh aspect of this invention provides the application of the heat-resistant ABS resin described herein in the automotive and home appliance industries.

[0013] The grafted SAN resin provided by this invention is a SAN resin with heat-resistant branches. When used to replace SAN resin in ABS resin formulations, the resulting heat-resistant ABS resin not only exhibits excellent heat resistance but also good compatibility with heat-resistant modifiers. The heat-resistant modifiers are uniformly dispersed in the ABS resin, allowing it to maintain good mechanical properties. Furthermore, this heat-resistant ABS resin also has a low odor, making it suitable for use in low-odor products such as automobiles.

[0014] This invention employs reactive extrusion processing to graft heat-resistant structures onto SAN resin, thereby increasing its heat resistance, reducing the amount of heat-resistant agent used, increasing the compatibility between the matrix SAN resin and the heat-resistant modifier, and improving the dispersibility of the heat-resistant modifier. While improving the heat resistance of ABS resin, it also addresses the problem of uneven dispersion of the heat-resistant modifier in ABS resin. This invention enhances the heat resistance of ABS resin while maintaining its mechanical properties, thus possessing significant economic and practical value. Detailed Implementation

[0015] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0016] This invention provides a grafted SAN resin, which includes SAN resin and grafted chains. The grafted chains include: heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units. In the grafted SAN resin, the weight ratio of SAN resin, heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units is 40-80:1-6:1-10:0.1-5.

[0017] In this invention, there are no special requirements for the weight ratio of each structural unit in the grafted SAN resin. According to a preferred embodiment of this invention, the weight ratio of SAN resin, heat-resistant monomer structural unit, styrene structural unit, and maleic anhydride structural unit in the grafted SAN resin is 60-70:2.3-2.8:3.6-4.2:0.6-0.7.

[0018] It should be noted that, in this invention, the weight ratio of SAN resin, heat-resistant monomer structural unit, styrene structural unit, and maleic anhydride structural unit in the grafted SAN resin is calculated based on the amount of raw materials fed into the resin.

[0019] In this invention, there are no special requirements for the type of SAN resin. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the SAN resin is a bulk SAN resin.

[0020] In this invention, there are no special requirements for the weight-average molecular weight of SAN resin. For example, the weight-average molecular weight of SAN resin can be 90,000 to 200,000.

[0021] In this invention, there are no special requirements for the melt index of SAN resin. For example, the melt index of SAN resin can be 10-40 g / 10 min.

[0022] In this invention, the range of heat-resistant monomers that can be selected is relatively wide. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the heat-resistant monomer is one or more of α-methylstyrene, N-phenylmaleimide, p-divinylbenzene, and acrylonitrile, preferably N-phenylmaleimide.

[0023] It should be noted that, in this invention, the grafted SAN resin is a SAN resin with heat-resistant branches, which is formed by grafting a copolymer of heat-resistant monomers, styrene, and maleic anhydride onto the SAN resin. Adopting the aforementioned preferred embodiment is beneficial for increasing the heat resistance of the matrix material and its compatibility with heat-resistant agents. Replacing part of the SAN resin in the ABS resin formulation with a heat-resistant grafted SAN resin can improve the heat resistance of the resulting ABS resin and also increase the compatibility between the rubber phase and the heat-resistant modifier.

[0024] This invention provides the application of the grafted SAN resin described herein as an additive in the preparation of heat-resistant ABS resin. The grafted SAN resin provided by this invention is a SAN resin with heat-resistant branches, which can be used to replace SAN resin in ABS resin formulations to prepare heat-resistant ABS resin.

[0025] This invention provides a heat-resistant ABS resin, which, by weight, comprises: 40-110 parts grafted SAN resin 18-30 parts of high-polymer ABS powder Heat-resistant modifier 1-30 parts Antioxidant 0.1-5 parts Lubricant 0.1-3 parts; The grafted SAN resin is the grafted SAN resin described in this invention.

[0026] The heat-resistant ABS resin provided by this invention not only has excellent heat resistance, but also good compatibility with the heat-resistant modifier. The heat-resistant modifier is evenly dispersed in the ABS resin, enabling it to maintain good mechanical properties.

[0027] According to a preferred embodiment of the present invention, the impact strength of the heat-resistant ABS resin is 13-24 kJ / m. 2 .

[0028] According to a preferred embodiment of the present invention, the Vicat softening temperature of the heat-resistant ABS resin is 98-115°C.

[0029] According to a preferred embodiment of the present invention, the glass transition temperature of the heat-resistant ABS resin is 118-140°C.

[0030] According to a preferred embodiment of the present invention, the heat distortion temperature of the heat-resistant ABS resin is 77-92°C.

[0031] In this invention, there are no special requirements for the adhesive content of the ABS high-adhesion powder. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the adhesive content of the ABS high-adhesion powder is 50-70%.

[0032] In this invention, there are no special requirements for the rubber grafting rate of the ABS high-rubber powder. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the rubber grafting rate of the ABS high-rubber powder is 40-50%.

[0033] In this invention, the range of heat-resistant modifiers that can be selected is relatively wide. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the heat-resistant modifier is one or more of poly(α-methylstyrene), N-phenylmaleimide-styrene, N-phenylmaleimide-styrene-maleic anhydride, MS-NB (Denki Kagaku, Japan), N-phenylmaleimide-styrene-acrylonitrile, styrene-maleic anhydride-acrylic acid, polycarbonate (PC), and polybutylene terephthalate (PBT).

[0034] In this invention, the glass transition temperature of the heat-resistant modifier can be selected from a wide range. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the glass transition temperature of the heat-resistant modifier is 120-280°C.

[0035] In this invention, there are no special requirements for the type of antioxidant. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the antioxidant is antioxidant 618, antioxidant 168, antioxidant 626, antioxidant 1076, or antioxidant 1010.

[0036] This invention does not have special requirements for lubricants; as long as there is a lubricant, the purpose of this invention can be achieved. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the lubricant includes an internal lubricant and an external lubricant.

[0037] In this invention, the weight ratio of internal lubricant to external lubricant can be selected within a wide range. The following is an illustrative example, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the weight ratio of internal lubricant to external lubricant is 1-10:1. The simultaneous use of internal and external lubricants in this invention has advantages such as high lubrication synergy efficiency, less lubricant precipitation, and good complementary effects between internal and external lubrication.

[0038] In this invention, a wide range of internal lubricants can be selected. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the internal lubricant is one or more of N,N'-ethylene bis-stearamide, oleamide, pentaerythritol distearate, pentaerythritol tetrastearate, ethylene glycol distearate, glyceryl distearate, and diethylene glycol distearate, preferably N,N'-ethylene bis-stearamide. Using the aforementioned preferred internal lubricant can significantly reduce the torque during the ABS resin processing and molding process and improve its processability.

[0039] In this invention, there are no special requirements for the type of external lubricant. The following is an illustrative description, but it does not limit the scope of the invention. According to a preferred embodiment of the invention, the external lubricant is one or more of magnesium stearate, calcium stearate, zinc stearate, and fluoroelastomer, preferably magnesium stearate. Using the aforementioned preferred external lubricant is beneficial for the formation of an external lubricating layer between the ABS resin melt matrix and the inner wall of the processing machinery during the extrusion injection molding process, thereby improving the surface properties of the sample and reducing impurities entrained on its surface.

[0040] According to a preferred embodiment of the present invention, the heat-resistant ABS resin comprises, by weight, the following components: 66-78 parts of grafted SAN resin 18-25 parts of high-polymer ABS powder 10-18 parts of heat-resistant modifier Antioxidant 0.1-0.5 parts Internal lubricant 0.6-1 part External lubricant 0.1-0.3 parts.

[0041] By adopting the aforementioned preferred embodiments, it is possible to achieve excellent comprehensive performance of heat-resistant ABS resin, balancing heat resistance with impact strength, processing flow properties, and aging resistance.

[0042] The heat-resistant ABS resin provided by this invention not only possesses excellent heat resistance but also exhibits good compatibility with heat-resistant modifiers. The heat-resistant modifiers are uniformly dispersed in the ABS resin, enabling it to maintain good mechanical properties. Furthermore, this heat-resistant ABS resin is characterized by low odor, making it suitable for use in low-odor products such as automobiles.

[0043] Any heat-resistant ABS resin possessing the aforementioned characteristics can achieve the objectives of this invention. There are no special requirements for its preparation method. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the preparation method of the heat-resistant ABS resin includes the following steps: (a) Mix grafted SAN resin, ABS high-adhesion powder, heat-resistant modifier, antioxidant, and lubricant; (b) The mixture obtained in step (a) is melted and then extruded and granulated.

[0044] In this invention, it should be noted that, in preparing heat-resistant ABS resin, grafted SAN resin can be prepared in advance, and then the heat-resistant grafted SAN resin can be used to replace the SAN resin in the ABS resin formulation to obtain heat-resistant ABS resin; alternatively, the two steps can be combined into one step. The following is an illustrative description, but does not limit the scope of the invention. According to a preferred embodiment of the invention, the method for preparing the heat-resistant ABS resin includes the following steps: (1) Mix SAN resin, heat-resistant monomer, styrene, maleic anhydride and initiator to obtain grafted SAN resin premix; (2) Add ABS high-rubber powder, heat-resistant modifier, antioxidant and lubricant to the grafted SAN resin premix in step (1) and continue mixing; (3) The mixture obtained in step (2) is added to a twin-screw extruder for melt reaction and extrusion granulation; The weight ratio of the SAN resin, heat-resistant monomer, styrene, and maleic anhydride is 40-80:1-6:1-10:0.1-5.

[0045] According to a preferred embodiment of the present invention, the weight ratio of SAN resin, heat-resistant monomer, styrene and maleic anhydride in step (1) is 60-70:2.3-2.8:3.6-4.2:0.6-0.7.

[0046] In step (1) of the present invention, there are no special requirements for the type of SAN resin. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the SAN resin in step (1) is a bulk SAN resin.

[0047] In step (1) of this invention, there are no special requirements for the weight-average molecular weight of SAN resin. For example, the weight-average molecular weight of SAN resin can be 90,000 to 200,000.

[0048] In step (1) of this invention, there are no special requirements for the melt index of SAN resin. For example, the melt index of SAN resin can be 10-40 g / 10 min.

[0049] In step (1) of the present invention, the range of heat-resistant monomers that can be selected is relatively wide. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the heat-resistant monomer in step (1) is one or more of α-methylstyrene, N-phenylmaleimide, p-divinylbenzene, and acrylonitrile, preferably N-phenylmaleimide.

[0050] In step (1) of the present invention, there are no special requirements for the mixing time. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the mixing time in step (1) is 1-5 min.

[0051] In step (1) of the present invention, the mixing speed can be selected from a wide range. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the mixing speed in step (1) is 100-500 rpm.

[0052] In step (2) of the present invention, there are no special requirements for the mixing time. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the mixing time in step (2) is 3-6 min.

[0053] In step (2) of the present invention, the mixing speed can be selected from a wide range. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the mixing speed in step (2) is 100-500 rpm.

[0054] In step (1) of the present invention, there are no special requirements for the type of initiator. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the initiator in step (1) is one or more of dicumyl peroxide (DCP), benzoyl peroxide (BPO), dialkyl peroxide, and bis-tert-butyl dicumyl peroxide (BIPB), preferably benzoyl peroxide.

[0055] In step (1) of the present invention, the weight ratio of styrene to initiator can be selected from a wide range. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the weight ratio of styrene to initiator in step (1) is 1-10:0.1-5, preferably 3.6-4.2:0.4-0.48.

[0056] In this invention, there are no special requirements for the equipment used in the mixing process. Commonly used mixing equipment can be used for this invention. For example, a high-speed mixer can be used to mix materials.

[0057] In this invention, there are no special requirements for the high-speed mixer. Any high-speed mixer that can achieve the purpose of this invention can be used in this invention, and can be selected according to actual needs. Further details will not be provided here.

[0058] In step (3) of the present invention, the melt reaction is carried out in a twin-screw extruder. There are no special requirements for the main screw speed. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the main screw speed in step (3) is 200-500 rpm.

[0059] In this invention, there are no special requirements for the twin-screw extruder; any commonly used twin-screw extruder is suitable and can be selected according to actual needs, which will not be elaborated here. Generally speaking, according to the direction of material movement in the twin-screw extruder, it can be divided into 8 to 13 barrel sections. The barrel section through which the material first passes is the first barrel section, and the barrel section through which the material last passes is the last barrel section. The twin-screw extruder used in this invention contains 10 barrel sections.

[0060] In this invention, in order to enhance the dispersing effect of the extrusion process, the screw of the twin-screw extruder can be configured on the screw of a standard shearing screw block combination to appropriately increase the backmixing unit.

[0061] In step (3) of this invention, there are no special requirements for the melting reaction temperature. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the melting reaction temperature in step (3) is 170-250°C. It should be noted that the melting reaction temperature of 170-250°C refers to the temperature of the first section of the twin-screw extruder being 170°C and the temperature of the last section being 250°C.

[0062] According to a preferred embodiment of the present invention, the twin-screw extruder is provided with three exhaust ports. The positions of the three exhaust ports on the twin-screw extruder are not particularly required; for example, the first, second, and third exhaust ports can be located on the 5th, 7th, and 9th sections of the twin-screw extruder barrel, respectively. This design ensures that the reactive monomers are not removed by the vacuum system.

[0063] In this invention, there are no special requirements for the exhaust method of the three exhaust ports, and the selection can be made according to actual needs.

[0064] According to a preferred embodiment of the present invention, the first stage is natural exhaust, and the pressure at the exhaust port of the first stage is atmospheric pressure.

[0065] According to a preferred embodiment of the present invention, the second stage is a low-vacuum stripping exhaust. There are no special requirements for the exhaust port pressure of the second stage. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the exhaust port pressure of the second stage is 80-100 kPa, preferably 90-100 kPa.

[0066] According to a preferred embodiment of the present invention, the third stage is a high-vacuum exhaust. There are no special requirements for the pressure of the exhaust port of the third stage. The following is an illustrative description, but it does not limit the scope of the present invention. According to a preferred embodiment of the present invention, the pressure of the exhaust port of the third stage is 10-80 kPa, preferably 20-30 kPa.

[0067] It should be noted that in this invention, the second stage of stripping and exhaust is achieved by water injection into the extruder. There are no special requirements for the amount of water injected. The following is an illustrative description, but it does not limit the scope of this invention. According to a preferred embodiment of this invention, the amount of water injected is 0.2-1.0 wt% of the extruder output, preferably 0.3-0.6 wt%.

[0068] This invention provides a heat-resistant ABS resin prepared by the preparation method described herein.

[0069] According to a preferred embodiment of the present invention, the impact strength of the heat-resistant ABS resin is 13-24 kJ / m. 2 .

[0070] According to a preferred embodiment of the present invention, the Vicat softening temperature of the heat-resistant ABS resin is 98-115°C.

[0071] According to a preferred embodiment of the present invention, the glass transition temperature of the heat-resistant ABS resin is 118-140°C.

[0072] According to a preferred embodiment of the present invention, the heat distortion temperature of the heat-resistant ABS resin is 77-92°C.

[0073] The heat-resistant ABS resin provided by this invention not only possesses excellent heat resistance but also exhibits good compatibility with heat-resistant modifiers. The heat-resistant modifiers are uniformly dispersed in the ABS resin, allowing it to maintain good mechanical properties. Furthermore, this heat-resistant ABS resin is characterized by low odor, making it suitable for use in low-odor products such as automobiles. This invention employs a reactive extrusion process to graft heat-resistant structures onto SAN resin, increasing its heat resistance, reducing the amount of heat-resistant modifier used, increasing the compatibility between the matrix SAN resin and the heat-resistant modifier, and improving the dispersibility of the heat-resistant modifier. This improves the heat resistance of the ABS resin while addressing the problem of uneven dispersion of the heat-resistant modifier within the ABS resin, thus enhancing its heat resistance while maintaining the mechanical properties of the ABS resin.

[0074] This invention provides the application of the heat-resistant ABS resin described herein in the automotive and home appliance industries, which has advantages such as low cost, balanced comprehensive performance, and low odor.

[0075] In this invention, the test standards for the Vicat softening temperature, glass transition temperature and heat distortion temperature of heat-resistant ABS resin are: GB / T 1633 (B50) and GB / T1634.1 (120℃ / h).

[0076] In this invention, the test standard for the impact strength of heat-resistant ABS resin is GB / T 1043.1.

[0077] In this invention, the test standard for residual monomers in heat-resistant ABS resin is: Q / SY JH10811501.02 (enterprise standard).

[0078] Example 1 (1) 77 parts by weight of SAN resin (brand: PetroChina Jilin Chemical SAN-2437, weight average molecular weight of 95000, and / or melt index of 30g / 10min, the same as the following examples and comparative examples), 3.08 parts of N-phenylmaleimide, 4.62 parts of styrene, 0.77 parts of maleic anhydride, and 0.539 parts of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0079] (2) 23 parts by weight of ABS high-rubber powder (brand: PW-151, rubber content of 60%, rubber grafting rate of 44%, the same as the following examples and comparative examples), 1 part of heat-resistant modifier MS-NB (glass transition temperature of 196℃, the same as the following examples and comparative examples), 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate are added to a high-speed mixer and mixed with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0080] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0081] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0082] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0083] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0084] Example 2 (1) 72 parts by weight of SAN resin, 2.88 parts by weight of N-phenylmaleimide, 4.32 parts by weight of styrene, 0.72 parts by weight of maleic anhydride and 0.504 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0085] (2) Add 23 parts by weight of ABS high-polymer powder, 5 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0086] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0087] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0088] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0089] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0090] Example 3 (1) 67 parts by weight of SAN resin, 2.68 parts by weight of N-phenylmaleimide, 4.02 parts by weight of styrene, 0.67 parts by weight of maleic anhydride and 0.469 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0091] (2) Add 23 parts by weight of ABS high-adhesion powder, 10 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0092] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0093] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0094] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0095] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0096] Example 4 (1) 62 parts by weight of SAN resin, 2.48 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0097] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0098] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0099] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second exhaust port does not use stripping technology and does not inject water.

[0100] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0101] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0102] Example 5 (1) 62 parts by weight of SAN resin, 2.48 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0103] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0104] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0105] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0106] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0107] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0108] Example 6 (1) 62 parts by weight of SAN resin, 2.48 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0109] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0110] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0111] (4) The twin-screw extruder is equipped with three exhaust ports. The pressure of the first exhaust port is atmospheric pressure, the pressure of the second exhaust port is 95 kPa, and the pressure of the third exhaust port is 60 kPa. The second stage stripping is achieved by water injection into the extruder, and the water injection amount is 1.0 wt% of the extruder output.

[0112] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0113] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0114] Example 7 (1) Add 57 parts by weight of SAN resin, 2.28 parts by weight of N-phenylmaleimide, 3.42 parts by weight of styrene, 0.57 parts by weight of maleic anhydride and 0.399 parts by weight of benzoyl peroxide into a high-speed mixer and mix at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0115] (2) Add 23 parts by weight of ABS high-adhesion powder, 20 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0116] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0117] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0118] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0119] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0120] Example 8 (1) 62 parts by weight of SAN resin, 1.2 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0121] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0122] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0123] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0124] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0125] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0126] Example 9 (1) 62 parts by weight of SAN resin, 6.0 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0127] (2) Add 23 parts by weight of ABS high-rubber powder, 3 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0128] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0129] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0130] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0131] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0132] Example 10 (1) 62 parts by weight of SAN resin, 2.48 parts by weight of N-phenylmaleimide, 1.2 parts by weight of styrene, 0.62 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0133] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0134] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0135] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0136] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0137] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0138] Example 11 (1) 62 parts by weight of SAN resin, 2.48 parts by weight of N-phenylmaleimide, 3.72 parts by weight of styrene, 0.2 parts by weight of maleic anhydride and 0.434 parts by weight of benzoyl peroxide were added to a high-speed mixer and mixed at high speed (400 rpm) for 3 min to obtain grafted SAN resin premix.

[0139] (2) Add 23 parts by weight of ABS high-resin powder, 15 parts of heat-resistant modifier MS-NB, 0.2 parts of antioxidant 618 (SPEP), 0.8 parts of N,N'-ethylene bis-stearamide, and 0.2 parts of magnesium stearate to a high-speed mixer and continue mixing with the grafted SAN resin premix for 3 minutes to obtain ABS heat-resistant modified special material.

[0140] (3) Add the special material obtained to the twin-screw extruder, extrude the granules to obtain heat-resistant ABS resin, set the temperature of each heating section to 170-230℃, set the die temperature to 220℃, and set the main screw speed to 300rpm.

[0141] (4) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second stage stripping is achieved by injecting water into the extruder, and the water injection amount is 0.5 wt% of the extruder output.

[0142] (5) Raw materials are added to the first section of the twin-screw extruder, the fifth section of the cylinder is equipped with the first atmospheric pressure exhaust port, and the seventh and ninth sections of the cylinder are equipped with the second and third vacuum exhaust ports.

[0143] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0144] Comparative Example 1 (1) Add 57 parts SAN resin, 23 parts ABS high-adhesion powder, 20 parts modifier MS-NB, 0.2 parts antioxidant 618 (SPEP), 0.8 parts N,N'-ethylene bis-stearamide, and 0.2 parts magnesium stearate to a high-speed mixer (400 rpm) and mix for 3 minutes to obtain ABS heat-resistant modified special material.

[0145] (2) The special material obtained is added to the twin-screw extruder and the granules are extruded to obtain heat-resistant ABS resin. The temperature of each heating section is set to 170-230℃, the die temperature is set to 220℃, and the main screw speed is 300rpm.

[0146] (3) The twin-screw extruder is equipped with three exhaust ports. The first exhaust port has an atmospheric pressure, the second exhaust port has a pressure of 95 kPa, and the third exhaust port has a pressure of 25 kPa. The second exhaust port does not use stripping technology and does not inject water.

[0147] The performance parameters of the obtained heat-resistant ABS resin are shown in Table 1.

[0148] Table 1

[0149] As can be seen from the above examples, with the increase of the amount of grafted SAN resin, the toughness of the ABS resin is higher, but the heat resistance is worse. Comparing Example 7 with Comparative Example 1, it can be seen that using grafted SAN resin to replace the SAN resin in the ABS formulation results in a heat-resistant ABS resin with higher toughness, higher Vicat softening temperature, higher glass transition temperature, and higher heat distortion temperature. This indicates that when the grafted SAN resin with heat-resistant branches provided by the present invention is used to replace the SAN resin in the ABS formulation, it can not only improve the heat resistance of the obtained heat-resistant ABS resin, but also increase the compatibility between the rubber phase and the heat-resistant modifier.

[0150] The preferred embodiments of the present invention have been described above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A grafted SAN resin, characterized in that, The grafted SAN resin includes SAN resin and grafted chains, wherein the grafted chains include: heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units; in the grafted SAN resin, the weight ratio of SAN resin, heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units is 40-80:1-6:1-10:0.1-5.

2. The grafted SAN resin according to claim 1, characterized in that, In the grafted SAN resin, the weight ratio of SAN resin, heat-resistant monomer structural units, styrene structural units, and maleic anhydride structural units is 60-70: 2.3-2.8:3.6-4.2:0.6-0.7; and / or The SAN resin is a bulk-processed SAN resin, and / or has a weight-average molecular weight of 90,000-200,000, and / or a melt index of 10-40 g / 10 min; and / or The heat-resistant monomer is one or more of α-methylstyrene, N-phenylmaleimide, p-divinylbenzene, and acrylonitrile.

3. The use of the grafted SAN resin as an additive in the preparation of heat-resistant ABS resin according to claim 1 or 2.

4. A heat-resistant ABS resin, characterized in that, The ABS resin comprises, by weight parts: 40-110 parts grafted SAN resin 18-30 parts of high-polymer ABS powder Heat-resistant modifier 1-30 parts Antioxidant 0.1-5 parts Lubricant 0.1-3 parts; The grafted SAN resin is the grafted SAN resin according to claim 1 or 2.

5. The ABS resin according to claim 4, characterized in that, The heat-resistant ABS resin, Impact strength is 13-24 kJ / m 2 ; and / or The Vicat softening temperature is 98-115℃; and / or The glass transition temperature is 118-140℃; and / or The heat distortion temperature is 77-92℃.

6. The ABS resin according to claim 4, characterized in that, The ABS high-rubber powder has a rubber content of 50-70% and / or a rubber grafting rate of 40-50%. and / or The heat-resistant modifier is one or more of the following: poly(α-methylstyrene), N-phenylmaleimide-styrene, N-phenylmaleimide-styrene-maleic anhydride, MS-NB, N-phenylmaleimide-styrene-acrylonitrile, styrene-maleic anhydride-acrylic acid, polycarbonate, and polybutylene terephthalate; and / or The glass transition temperature of the heat-resistant modifier is 120-280℃; and / or The antioxidants are antioxidant 618, antioxidant 168, antioxidant 626, antioxidant 1076, and antioxidant 1010; and / or The lubricant includes an internal lubricant and an external lubricant, with the weight ratio of the internal lubricant to the external lubricant being 1-10:1; The internal lubricant is one or more of N,N'-ethylene bis-stearamide, oleamide, pentaerythritol distearate, pentaerythritol tetrastearate, ethylene glycol distearate, glyceryl distearate, and diethylene glycol distearate; and / or The external lubricant is one or more of magnesium stearate, calcium stearate, zinc stearate, and fluoroelastomer.

7. The ABS resin according to claim 4, characterized in that, The ABS resin comprises, by weight parts: 66-78 parts of grafted SAN resin 18-25 parts of high-polymer ABS powder 10-18 parts of heat-resistant modifier Antioxidant 0.1-0.5 parts Internal lubricant 0.6-1 part External lubricant 0.1-0.3 parts.

8. A method for preparing the heat-resistant ABS resin according to claims 4-7, characterized in that, The method includes the following steps: (a) Mix grafted SAN resin, ABS high-adhesion powder, heat-resistant modifier, antioxidant, and lubricant; (b) The mixture obtained in step (a) is melted and then extruded and granulated.

9. A method for preparing the heat-resistant ABS resin according to claims 4-7, characterized in that, The method includes the following steps: (1) Mix SAN resin, heat-resistant monomer, styrene, maleic anhydride and initiator to obtain grafted SAN resin premix; (2) Add ABS high-rubber powder, heat-resistant modifier, antioxidant and lubricant to the grafted SAN resin premix in step (1) and continue mixing; (3) The mixture obtained in step (2) is subjected to a melt reaction and then extruded and granulated; The weight ratio of the SAN resin, heat-resistant monomer, styrene, and maleic anhydride is 40-80:1-6:1-10:0.1-5.

10. The preparation method according to claim 9, characterized in that, In step (1), The weight ratio of the SAN resin, heat-resistant monomer, styrene, and maleic anhydride is 60-70: 2.3-2.8:3.6-4.2:0.6-0.7; and / or The SAN resin is a bulk-processed SAN resin, and / or has a weight-average molecular weight of 90,000-200,000, and / or a melt index of 10-40 g / 10 min; and / or The heat-resistant monomer is one or more of α-methylstyrene, N-phenylmaleimide, p-divinylbenzene, and acrylonitrile.

11. The preparation method according to claim 9, characterized in that, The mixing conditions in step (1) include: The time is 1-5 minutes; and / or the rotation speed is 100-500 rpm; and / or The mixing conditions in step (2) include: The time is 3-6 minutes; and / or the rotation speed is 100-500 rpm.

12. The preparation method according to claim 9, characterized in that, In step (1), The initiator is one or more of dicumyl peroxide, benzoyl peroxide, dialkyl peroxide, and bis-tert-butyldicumyl peroxide; and / or The weight ratio of styrene to initiator is 1-10:0.1-5.

13. The preparation method according to claim 12, characterized in that, In step (1), The weight ratio of styrene to initiator is 3.6-4.2:0.4-0.

48.

14. The preparation method according to claim 8 or 9, characterized in that, The melt reaction takes place in a twin-screw extruder, which is equipped with three venting ports; The first stage is natural exhaust, and the pressure at the first stage exhaust port is atmospheric pressure; and / or The second stage is a low-vacuum stripping exhaust, with an exhaust port pressure of 80-100 kPa; and / or The third stage is a high-vacuum exhaust, with an exhaust port pressure of 10-80 kPa.

15. The preparation method according to claim 14, characterized in that, The second stage of low-vacuum stripping and exhaust is achieved by water injection into an extruder. The water injection amount is 0.2-1.0 wt% of the extruder output.

16. The heat-resistant ABS resin prepared by the preparation method according to any one of claims 8-15.

17. The heat-resistant ABS resin according to claim 16, characterized in that, The heat-resistant ABS resin, Impact strength is 13-24 kJ / m 2 ; and / or The Vicat softening temperature is 98-115℃; and / or The glass transition temperature is 118-140℃; and / or The heat distortion temperature is 77-92℃.

18. The application of the heat-resistant ABS resin according to any one of claims 4-7 and 16-17 in the automotive and home appliance industries.

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