PPS resin composition, PPS resin composite material, and preparation method and application thereof

Abstract

The present invention relates to the field of resin materials, and discloses a PPS resin composition, a PPS resin composite material, and a preparation method and application thereof. The PPS resin composition of the present invention contains a PPS resin, a reinforcing material, a toughening agent, a polyepoxy-modified silicone resin, and an amine-containing polymer. The PPS resin composition of the present invention can greatly improve the bonding strength between the PPS resin composite material and the epoxy resin, while maintaining a high level of mechanical properties.

Description

Technical Field

[0001] The present invention relates to the field of resin materials, and in particular to a PPS resin composition, a PPS resin composite material, and a preparation method and application thereof. Background Art

[0002] With the shortage of traditional petroleum energy, electric vehicle technology has been developed, promoted and applied worldwide. Capacitors, key components in electric vehicles, have very strict material requirements and need to have excellent rigidity, flame retardancy, high temperature resistance and other properties. In addition, the material needs to have good adhesion to epoxy resin. Polyphenylene sulfide (PPS) is an engineering plastic with good rigidity, heat resistance, flame retardancy, corrosion resistance, fatigue resistance and wear resistance. The performance of the material can fully meet the requirements, but its adhesion to epoxy resin is poor. If it is in a harsh outdoor environment, its adhesion to epoxy resin is even worse, which greatly limits its application in this field.

[0003] CN112852157A discloses a conductive PPS composite material with good epoxy bonding force and a preparation method thereof, wherein the composition scheme described in the method is composed of PPS, glass fiber, conductive carbon black, carbon nanotubes, carbon fiber, toughening agent, epoxy resin, coupling agent and release agent. The method is to introduce epoxy resin into PPS resin to improve the bonding performance of PPS composite material and epoxy resin. However, the introduced epoxy resin is not sufficient to improve the bonding performance of PPS material and epoxy resin, and also causes the mechanical properties of PPS material to be reduced to a certain extent. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that the bonding performance between PPS material and epoxy resin is not sufficiently improved and the mechanical properties are reduced, and to provide a PPS resin composition, a PPS resin composite material obtained by molding the PPS resin composition, and their applications. According to the PPS resin composition of the present invention, it can greatly improve the bonding strength between the PPS resin composite material and the epoxy resin, while maintaining a high level of mechanical properties.

[0005] The inventors of the present invention have found through in-depth research that although epoxy resin and PPS have good compatibility, the decomposition temperature of epoxy resin is relatively low, while the molding processing temperature of PPS is relatively high, which needs to be above 300°C, usually in the range of 310°C-330°C. Within this temperature range, a considerable portion of epoxy resin has been decomposed. Secondly, the epoxy resin added to the PPS resin is the same as the epoxy adhesive system to be bonded, and they have good compatibility, thereby improving their bonding strength, which is achieved in the form of intermolecular forces, and no chemical bonds with stronger bonding strength are formed. Therefore, the addition of epoxy resin cannot well improve the bonding performance between the material and the epoxy resin; and due to the decomposition of the epoxy resin, the low molecular weight products decomposed will reduce the mechanical properties of the PPS composite material to a certain extent.

[0006] In view of this, the inventors of the present invention have conducted further research on how to improve the bonding performance between the material and the epoxy resin. The research found that by using the PPS resin composition of the specific composition of the present invention, the bonding strength between the PPS resin composite material and the epoxy resin can be greatly improved, while the mechanical properties remain at a high level. The reason for the above effect is not very clear, but it is speculated that: the heat resistance of the polyepoxy-modified silicone resin is excellent, the decomposition temperature is greater than 400°C, and it can fully meet the processing temperature requirements of the PPS resin. During the processing, -SM (M is hydrogen, sodium, chlorine) in the PPS resin, the epoxy group in the polyepoxy-modified silicone resin and the amine group in the amine-containing polymer react to form a strong chemical bond with each other. At the same time, the amine group of the amine polymer also reacts with the epoxy group in the epoxy resin to be bonded to form a strong chemical bond, thereby greatly improving the bonding strength.

[0007] Furthermore, the inventors of the present invention have further discovered that by adding inorganic fillers, the affinity and wettability of the PPS composite material to the epoxy resin can be greatly improved, so that the epoxy resin can be better spread on the surface of the PPS composite material, which is beneficial to the combination of the epoxy resin and the PPS resin composite material; and, due to the addition of inorganic fillers, the thermal expansion coefficient of the PPS composite material itself is reduced, which is beneficial to ensure the dimensional stability and low deformation of the PPS composite material when subjected to cold and heat.

[0008] Therefore, the first aspect of the present invention provides a PPS resin composition, wherein the composition contains a PPS resin, a reinforcing material, a toughening agent, a polyepoxy-modified silicone resin and an amine-containing polymer.

[0009] Preferably, the composition contains 35-55 wt % of PPS resin, 13-45 wt % of reinforcing material, 2-8 wt % of toughening agent, 0.2-1.5 wt % of polyepoxy-modified silicone resin and 0.2-1.5 wt % of amine-containing polymer.

[0010] Preferably, the polyepoxy-modified silicone resin is one or more of a silicone resin-glycidyl methacrylate copolymer, a silicone resin-methyl acrylate-glycidyl methacrylate copolymer, and a silicone resin-butyl acrylate-glycidyl methacrylate copolymer.

[0011] Preferably, the amine-containing polymer is one or more of polyamide wax, polyethyleneimine and polyacrylamide, preferably polyamide wax.

[0012] Preferably, the composition further contains 5-25 wt % of an inorganic filler.

[0013] Preferably, the inorganic filler is one or more of calcium carbonate, silica powder, phlogopite, muscovite, barium sulfate, wollastonite, talc, kaolin, magnesium hydroxide, aluminum hydroxide and aluminum oxide, more preferably one or more of calcium carbonate, silica powder and phlogopite.

[0014] Preferably, the toughening agent is one or more of POE elastomer, POE grafted MAH, POE grafted GMA, EPDM grafted MAH, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer grafted MAH, SEBS and SEBS grafted MAH.

[0015] Preferably, the reinforcing material is one or more of glass fiber, carbon fiber, potassium titanate whisker, basic magnesium sulfate whisker, silicon carbide whisker, aluminum borate whisker, zinc oxide whisker and calcium sulfate whisker, more preferably glass fiber.

[0016] Preferably, the melt index of the PPS resin at a temperature of 316° C. and a load of 5 kg is 100-800 g / 10 min, more preferably 230-600 g / 10 min.

[0017] Preferably, the composition further contains 2-4% by weight of other adjuvants.

[0018] Preferably, the other additives are one or more of an antioxidant, a coupling agent, a lubricant and a masterbatch.

[0019] According to a second aspect of the present invention, a PPS resin composite material is provided, which is formed by molding the PPS resin composition described in the first aspect of the present invention.

[0020] According to a third aspect of the present invention, there is provided a method for preparing a PPS resin composite material, wherein the PPS resin composite material is formed by molding the PPS resin composition described in the first aspect of the present invention.

[0021] Preferably, the preparation method of the PPS resin composite material comprises the following steps:

[0022] 1) PPS resin, toughening agent, polyepoxy-modified silicone resin, amine-containing polymer and other optional auxiliary agents are first mixed to obtain a first mixture,

[0023] 2) After the first mixture and the inorganic filler are mixed for the second time, the mixture obtained by the second mixing is extruded and granulated together with the reinforcing material.

[0024] According to a fourth aspect of the present invention, there is provided use of the PPS resin composition described in the first aspect of the present invention or the PPS resin composite material described in the second aspect of the present invention in preparing a capacitor.

[0025] Preferably, the capacitor is an electric vehicle capacitor.

[0026] The PPS resin composition of the present invention can significantly improve the bonding strength between the PPS resin composite material and the epoxy resin, while maintaining a relatively high level of mechanical properties.

[0027] Furthermore, the addition of inorganic fillers can greatly improve the affinity and wettability of PPS composite materials to epoxy, so that epoxy can be better spread on the surface of PPS composite materials, which is beneficial to the combination of epoxy and PPS resin composite materials; and, due to the addition of inorganic fillers, the thermal expansion coefficient of PPS composite materials themselves is reduced, which is beneficial to ensure the dimensional stability and low deformation of PPS composite materials when subjected to cold and heat. DETAILED DESCRIPTION

[0028] The endpoints and any values ​​of the ranges disclosed in this article 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 each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0029] According to a first aspect of the present invention, a PPS resin composition is provided, wherein the composition contains a PPS resin, a reinforcing material, a toughening agent, a polyepoxy-modified silicone resin and an amine-containing polymer.

[0030] According to the present invention, by adopting the PPS resin composition of the specific composition of the present invention, the bonding strength between the PPS resin composite material and the epoxy resin can be greatly improved, while the mechanical properties are maintained at a high level. The content of each component in the PPS resin composition can be varied within a large range. For example, the composition can contain 35-55% by weight of PPS resin, 13-45% by weight of reinforcing material, 2-8% by weight of toughening agent, 0.2-1.5% by weight of polyepoxy-modified silicone resin and 0.2-1.5% by weight of amine-containing polymer; from the perspective of further improving the bonding strength between the PPS resin composite material and the epoxy resin, preferably, the composition can contain 43-55% by weight of PPS resin, 13-40% by weight of reinforcing material, 2-8% by weight of toughening agent, 0.5-1.5% by weight of polyepoxy-modified silicone resin and 0.8-1.5% by weight of amine-containing polymer.

[0031] According to the present invention, the toughening agent can be a substance that can increase the toughness of the PPS resin composite material. As such a toughening agent, it is preferred that the toughening agent is one or more of POE elastomer, POE grafted MAH, POE grafted GMA, EPDM grafted MAH, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer grafted MAH, SEBS and SEBS grafted MAH; more preferably, the toughening agent is one or more of POE elastomer, POE grafted MAH, POE grafted GMA, EPDM grafted MAH and ethylene-methyl acrylate-glycidyl methacrylate terpolymer.

[0032] The above-mentioned POE grafted MAH refers to POE grafted maleic anhydride, and specifically, the HS2-116A model of Hecheng Co., Ltd. can be used. It can also be synthesized by using POE, maleic anhydride and initiator DCP as raw materials using conventional synthesis methods in the art.

[0033] The above-mentioned POE grafted GMA refers to POE grafted glycidyl methacrylate, and specifically, the SOG-02 model of Jiayirong Company can be used. It can also be synthesized by using POE, glycidyl methacrylate and initiator DCP as raw materials using conventional synthesis methods in the art.

[0034] The above-mentioned EPDM grafted MAH refers to EPDM grafted maleic anhydride, and specifically, the ST-18 model of Nanjing Sutai Company can be used. It can also be synthesized by using EPDM, maleic anhydride and DCP as raw materials using conventional synthesis methods in the art.

[0035] According to the present invention, preferably, the melt index of the PPS resin at a temperature of 316° C. and a load of 5 kg is 100-800 g / 10 min, more preferably 230-600 g / 10 min.

[0036] In the present invention, the reinforcing material plays a role in improving the mechanical properties of the material. Such reinforcing materials include, for example, one or more of glass fiber, carbon fiber, potassium titanate whisker, basic magnesium sulfate whisker, silicon carbide whisker, aluminum borate whisker, zinc oxide whisker and calcium sulfate whisker. Glass fiber is preferred.

[0037] According to the present invention, the polyepoxy-modified silicone resin refers to a modified resin having multiple epoxy groups grafted onto silicone resin. Preferably, the polyepoxy-modified silicone resin is one or more of a silicone resin-glycidyl methacrylate copolymer, a silicone resin-methyl acrylate-glycidyl methacrylate copolymer, and a silicone resin-butyl acrylate-glycidyl methacrylate copolymer. Specifically, the U980-H4 model of Quansheng Polycarbon Technology Co., Ltd. can be used.

[0038] According to the present invention, preferably, the amine-containing polymer is one or more of polyamide wax, polyethyleneimine, and polyacrylamide; more preferably, the amine-containing polymer is polyamide wax. By using polyamide wax, the bonding strength between the PPS resin composite material and epoxy can be further improved, while the mechanical properties can be maintained at a high level.

[0039] According to the present invention, preferably, the composition further contains 5-25 wt % of an inorganic filler; more preferably, the composition further contains 10-25 wt % of an inorganic filler.

[0040] Preferably, the inorganic filler is one or more of calcium carbonate, silica powder, phlogopite, muscovite, barium sulfate, wollastonite, talc, kaolin, magnesium hydroxide, aluminum hydroxide and aluminum oxide; more preferably, the inorganic filler is one or more of calcium carbonate, silica powder and mica.

[0041] In the present invention, by adding inorganic fillers, the affinity and wettability of the PPS composite material to the epoxy resin can be greatly improved, so that the epoxy resin can be better spread on the surface of the PPS composite material, which is beneficial to the combination of the epoxy resin and the PPS resin composite material; and due to the addition of inorganic fillers, the thermal expansion coefficient of the PPS composite material itself is reduced, which is beneficial to ensure the dimensional stability and low deformation of the PPS composite material when subjected to cold and heat.

[0042] According to the present invention, within the range not affecting the effects of the present invention, the composition of the present invention also preferably contains 2-4% by weight of various other auxiliary agents commonly used in the art.

[0043] Examples of the other additives include one or more of antioxidants, coupling agents, lubricants and masterbatches.

[0044] Examples of the antioxidant include one or more of antioxidant S9228, antioxidant 1076, antioxidant 1098, antioxidant AO-80, and antioxidant 168.

[0045] Examples of the coupling agent include one or more of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (A-1120), γ-aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane (KH590) and γ-glycidoxypropyltrimethoxysilane (KH560).

[0046] Examples of the lubricant include one or more of pentaerythritol stearate (PETS), ethylene bis stearamide (EBS), ethylene bis oleamide (EBO), polyethylene wax, magnesium stearate, calcium stearate, zinc stearate and silicone powder.

[0047] Examples of the masterbatch include one or more of masterbatch RF2014, masterbatch UN2014, and masterbatch CB9093.

[0048] According to a second aspect of the present invention, a PPS resin composite material is provided, which is formed by molding the PPS resin composition of the present invention.

[0049] According to a third aspect of the present invention, a method for preparing a PPS resin composite material is provided, wherein the PPS resin composite material is formed by molding the PPS resin composition of the present invention.

[0050] According to the present invention, the method of molding the PPS resin composite material of the present invention from the PPS resin composition of the present invention is not particularly limited, and can be carried out using various molding equipment and molding conditions commonly used in the art.

[0051] In a preferred embodiment of the present invention, the method for preparing the PPS resin composite material comprises the following steps:

[0052] 1) PPS resin, toughening agent, polyepoxy-modified silicone resin, amine-containing polymer and other optional auxiliary agents are first mixed to obtain a first mixture,

[0053] 2) After the first mixture and the inorganic filler are mixed for the second time, the mixture obtained by the second mixing is extruded and granulated together with the reinforcing material.

[0054] The first mixing and the second mixing may be performed in various mixing equipment commonly used in the art, for example, in a high-speed mixer.

[0055] The mixing time is sufficient as long as the mixed materials are uniformly mixed. For example, when a high-speed mixer is used, the first and second mixing conditions may include: a mixing temperature of 10-40° C., a mixing time of 1-5 minutes, and a mixing speed of 100 r / min-500 r / min.

[0056] The above-mentioned extrusion granulation can be carried out using equipment conventionally used in the field, for example, a twin-screw extruder can be used. When a twin-screw extruder is used, the mixture obtained by the second mixing can be added to the main feed port of the twin-screw extruder, and the reinforcing material can be added from the side feed port, and extrusion granulation can be carried out.

[0057] The above-mentioned extrusion granulation conditions may include: extrusion temperature: 270°C-330°C, extrusion speed 200-500r / min.

[0058] According to a fourth aspect of the present invention, there is provided use of the PPS resin composition of the present invention or the PPS resin composite material of the present invention in preparing a capacitor.

[0059] Preferably, the capacitor is an electric vehicle capacitor.

[0060] The present invention will be described in detail below by way of examples, but the present invention is not limited to the following examples.

[0061] In the following examples, the components are as follows:

[0062] PPS resin: purchased from Chongqing Jushi Company, GAC04 model, melt index is 350g / 10min (melt index at a temperature of 316°C and a load of 5kg).

[0063] Toughening agent: POE grafted GMA, purchased from Jiayirong Company, model SOG02.

[0064] Polyepoxy modified silicone resin: purchased from Quansheng Polycarbon Technology Co., Ltd., model U980-H4.

[0065] Amine-containing polymer: polyamide wax, purchased from Ocean Powder Company.

[0066] Glass fiber: purchased from Taishan Fiberglass Company, model T436H.

[0067] Other additives: antioxidant, AO-80 purchased from Aidico and S9228 purchased from Dover Chemical Company (weight ratio of 1:1.5); lubricant, PETS purchased from Lonza (LONZA); coupling agent, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane (A-1120) purchased from Momentive; masterbatch, UN2014 purchased from Cabot Corporation.

[0068] Examples 1-5

[0069] 1) Weigh the components according to the proportions shown in Table 1;

[0070] 2) PPS resin, toughening agent, polyepoxy-modified silicone resin, amine-containing polymer and other additives were placed in a high-speed mixer and mixed for 2 minutes;

[0071] 3) adding an inorganic filler to the mixture obtained in step 2) above, and mixing again for 2 minutes;

[0072] 4) The mixture obtained in step 3) is added to the main feed port of a twin-screw extruder, and glass fiber is added from the side feed port, followed by extrusion granulation.

[0073] Comparative Example 1

[0074] 1) Weigh the components according to the proportions shown in Table 1;

[0075] 2) PPS resin, toughening agent and other additives are placed in a high-speed mixer and mixed for 2 minutes;

[0076] 3) adding an inorganic filler to the mixture obtained in step 2) above, and mixing again for 2 minutes;

[0077] 4) The mixture obtained in step 3) is added to the main feed port of a twin-screw extruder, and glass fiber is added from the side feed port, followed by extrusion granulation.

[0078] Comparative Example 2

[0079] 1) Weigh the components according to the proportions shown in Table 1;

[0080] 2) PPS resin, toughening agent, polyepoxy-modified silicone resin and other additives were placed in a high-speed mixer and mixed for 2 minutes;

[0081] 3) adding an inorganic filler to the mixture obtained in step 2) above, and mixing again for 2 minutes;

[0082] 4) The mixture obtained in step 3) is added to the main feed port of a twin-screw extruder, and glass fiber is added from the side feed port, followed by extrusion granulation.

[0083] Comparative Example 3

[0084] 1) Weigh the components according to the proportions shown in Table 1;

[0085] 2) PPS resin, toughening agent, amine-containing polymer and other additives were placed in a high-speed mixer and mixed for 2 minutes;

[0086] 3) adding an inorganic filler to the mixture obtained in step 2) above, and mixing again for 2 minutes;

[0087] 4) The mixture obtained in step 3) is added to the main feed port of a twin-screw extruder, and glass fiber is added from the side feed port, followed by extrusion granulation.

[0088] Comparative Example 4

[0089] 1) Weigh the components according to the proportions shown in Table 1;

[0090] 2) PPS resin, toughening agent, other additives and epoxy resin were placed in a high-speed mixer and mixed for 2 minutes;

[0091] 3) adding an inorganic filler to the mixture obtained in step 2) above, and mixing again for 2 minutes;

[0092] 4) The mixture obtained in step 3) is added to the main feed port of a twin-screw extruder, and glass fiber is added from the side feed port, followed by extrusion granulation.

[0093] Comparative Example 5

[0094] 1) Weigh the components according to the proportions shown in Table 1;

[0095] 2) PPS resin, toughening agent, other additives and epoxy resin were placed in a high-speed mixer and mixed for 2 minutes;

[0096] 3) The mixture obtained in the above step 2) is added to the main feed port of the twin-screw extruder, and the glass fiber is added from the side feed port, and then extrusion granulation is performed.

[0097] Table 1

[0098]

[0099] Test Example 1

[0100] The particles obtained by extrusion granulation in the above examples and comparative examples were injection molded to obtain the mechanical specimens required for the test. The injection molding temperature was 280-320°C; the notched impact strength test standard was ASTM D256-2010; the tensile strength and elongation at break test standard was ASTM D638-2014; the flexural strength and flexural modulus test standard was ASTM D790-2017; the epoxy bonding strength test standard was ISO 4587-2003; and the linear expansion coefficient test standard was ASTM E831-19.

[0101] Table 2

[0102]

[0103] By comparing Examples 1-5 with Comparative Examples 1-4, it can be seen that by adopting the PPS resin composition of the specific composition of the present invention, the bonding strength between the PPS resin composite material and the epoxy resin can be greatly improved, while the mechanical properties are maintained at a high level.

[0104] By comparing Example 5 with Comparative Example 1, it can be seen that Comparative Example 1 is an example in which polyepoxy-modified silicone resin and amine-containing polymer are not used. Compared with Comparative Example 1, the epoxy bonding strength of Example 5 (PPS composition of the present invention) is significantly improved and the same or better mechanical properties can be maintained.

[0105] By comparing Example 5 with Comparative Example 2, it can be seen that Comparative Example 2 is an example in which an amine-containing polymer is not used. Compared with Comparative Example 2, the epoxy bonding strength of Example 5 (PPS composition of the present invention) is significantly improved and the same or better mechanical properties can be maintained.

[0106] By comparing Example 5 and Comparative Example 3, it can be seen that Comparative Example 3 is an example in which a polyepoxy-modified silicone resin is not used. Compared with Comparative Example 3, the epoxy bonding strength of Example 5 (PPS composition of the present invention) is significantly improved and has better mechanical properties.

[0107] By comparing Example 5 with Comparative Example 4, it can be seen that Comparative Example 4 is an example of using epoxy resin to replace the polyepoxy-modified silicone resin and the amine-containing polymer. Compared with Comparative Example 4, the epoxy bonding strength of Example 5 (the PPS composition of the present invention) is significantly improved and can have better mechanical properties.

[0108] By comparing Example 5 and Comparative Example 5, it can be seen that Comparative Example 5 is an example of using epoxy resin to replace the polyepoxy-modified silicone resin and the amine-containing polymer, and using PPS resin to replace the inorganic filler. Compared with Comparative Example 5, Example 5 (the PPS composition of the present invention) has significantly improved epoxy bonding strength, can have better mechanical properties, and has a smaller linear expansion coefficient.

[0109] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A PPS resin composition, characterized in that: The composition contains PPS resin, reinforcing material, toughening agent, polyepoxy-modified silicone resin and amine-containing polymer, wherein the amine-containing polymer is polyamide wax.

2. The composition according to claim 1, wherein The composition contains 35-55 weight percent of PPS resin, 13-45 weight percent of reinforcing material, 2-8 weight percent of toughening agent, 0.2-1.5 weight percent of polyepoxy-modified silicone resin and 0.2-1.5 weight percent of amine-containing polymer.

3. The composition according to claim 1, wherein The polyepoxy-modified silicone resin is one or more of a silicone resin-glycidyl methacrylate copolymer, a silicone resin-methyl acrylate-glycidyl methacrylate copolymer, and a silicone resin-butyl acrylate-glycidyl methacrylate copolymer.

4. The composition according to claim 2, wherein The polyepoxy-modified silicone resin is one or more of a silicone resin-glycidyl methacrylate copolymer, a silicone resin-methyl acrylate-glycidyl methacrylate copolymer, and a silicone resin-butyl acrylate-glycidyl methacrylate copolymer.

5. The composition according to any one of claims 1 to 4, wherein The composition also contains 5-25% by weight of an inorganic filler.

6. The composition according to claim 5, wherein The inorganic filler is one or more of calcium carbonate, silicon powder, phlogopite, muscovite, barium sulfate, wollastonite, talc, kaolin, magnesium hydroxide, aluminum hydroxide and aluminum oxide.

7. The composition according to claim 6, wherein The inorganic filler is one or more of calcium carbonate, silica powder and phlogopite.

8. The composition according to any one of claims 1 to 4, wherein The toughening agent is one or more of POE elastomer, POE grafted MAH, POE grafted GMA, EPDM grafted MAH, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, methyl methacrylate-butadiene-styrene copolymer grafted MAH, SEBS and SEBS grafted MAH.

9. The composition according to any one of claims 1 to 4, wherein The reinforcing material is one or more of glass fiber, carbon fiber, potassium titanate whisker, basic magnesium sulfate whisker, silicon carbide whisker, aluminum borate whisker, zinc oxide whisker and calcium sulfate whisker.

10. The composition according to claim 9, wherein The reinforcing material is glass fiber.

11. The composition according to any one of claims 1 to 4, wherein The PPS resin has a melt index of 100-800 g / 10 min at a temperature of 316° C. and a load of 5 kg.

12. The composition according to claim 11, wherein The PPS resin has a melt index of 230-600 g / 10 min at a temperature of 316° C. and a load of 5 kg.

13. The composition according to any one of claims 1 to 4, wherein The composition also contains 2-4% by weight of other adjuvants.

14. The composition according to claim 13, wherein The other additives are one or more of antioxidants, coupling agents, lubricants and masterbatches.

15. A PPS resin composite material, formed by molding the PPS resin composition according to any one of claims 1 to 14.

16. A method for preparing a PPS resin composite material, which is formed by molding the PPS resin composition according to any one of claims 1 to 14.

17. The method according to claim 16, wherein: The preparation method of the PPS resin composite material comprises the following steps: 1) PPS resin, toughening agent, polyepoxy-modified silicone resin, amine-containing polymer and other optional auxiliary agents are first mixed to obtain a first mixture, 2) After the first mixture and the inorganic filler are mixed for the second time, the mixture obtained by the second mixing is extruded and granulated together with the reinforcing material.

18. Use of the PPS resin composition according to any one of claims 1 to 14 or the PPS resin composite material according to claim 15 in the preparation of capacitors.

19. The use according to claim 18, wherein: The capacitor is an electric vehicle capacitor.

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