A waterproof and corrosion-resistant automobile trunk mat and a preparation method thereof

Abstract

This invention relates to the field of SBS material technology, specifically a waterproof and corrosion-resistant car trunk mat and its preparation method. It includes the following steps: Step 1: grafting perfluoroacrylate onto SBS, and then reacting it with monohydrogen-terminated polydimethylsiloxane to undergo a hydrosilylation reaction to prepare modified SBS; Step 2: modifying silica with vinyltrimethoxysilane to obtain modified silica; Step 3: (1) mixing the raw material components of the waterproof and corrosion-resistant car trunk mat according to the formula ratio, then adding them to a screw extruder for mixing, extruding into sheets to obtain a waterproof and corrosion-resistant car trunk mat sheet; (2) heating the waterproof and corrosion-resistant car trunk mat sheet, processing it with a vacuum forming machine, and water cooling to obtain a waterproof and corrosion-resistant car trunk mat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of SBS materials, and particularly relates to a waterproof and corrosion-resistant automobile trunk pad and a preparation method thereof. BACKGROUND

[0002] The automobile trunk, as an important storage space of the vehicle, often carries various objects, such as wet luggage, sports equipment, gardening tools, pets, and even liquid (such as beverages, cleaning agents, and oil stains) that may leak. The use environment of these objects poses a severe challenge to the performance of the trunk pad, especially the waterproofness and corrosion resistance, which have become the core demands of users.

[0003] The automobile trunk pads commonly seen in the market at present are mainly made of the following materials: PVC, rubber, leather, etc. The PVC is low in price, but it is prone to aging and decomposition to release harmful substances, which poses environmental and safety hazards. The rubber has good stability, but it has poor anti-static performance, is easy to absorb dust, has an odor, and has poor corrosion resistance. The leather is comfortable and beautiful, but it has poor waterproofness, is easy to absorb water and breed bacteria, and has low reliability.

[0004] In addition, in summer, the temperature inside the automobile can be as high as 70-90 DEG C. If the automobile trunk pad has poor heat resistance, it will degrade at this temperature, thereby causing performance attenuation. In addition, the automobile trunk pad is placed with various objects, is easy to get dirty, is not easy to clean, and is not beautiful after a long time.

[0005] Based on this, the present application provides a preparation method of a waterproof and corrosion-resistant automobile trunk pad, which has excellent heat resistance and stain resistance, and has important significance. SUMMARY

[0006] The present application aims to provide a waterproof and corrosion-resistant automobile trunk pad and a preparation method thereof to solve the problems in the background.

[0007] In order to solve the above technical problems, the present application provides the following technical scheme:

[0008] A preparation method of a waterproof and corrosion-resistant automobile trunk pad, comprising the following steps:

[0009] Step 1: grafting perfluoroacrylate onto SBS, and then carrying out a silicon-hydrogen addition reaction with monohydrogen-terminated polydimethylsiloxane to prepare modified SBS;

[0010] Step 2: modifying the silicon dioxide with vinyltrimethoxysilane to obtain modified silicon dioxide;

[0011] Step 3: (1) Mix the raw material components of the waterproof and corrosion-resistant automobile trunk pad according to the formula proportion, then add them into the screw extruder for mixing and extruding into a sheet, and obtain the waterproof and corrosion-resistant automobile trunk pad sheet with the required size; (2) Heat the waterproof and corrosion-resistant automobile trunk pad sheet to 160±5℃, then process it through the vacuum forming machine, and water cool to obtain the waterproof and corrosion-resistant automobile trunk pad.

[0012] Further, the waterproof and corrosion-resistant automobile trunk pad comprises the following raw material components: 50 parts of SEBS, 50-70 parts of modified SBS, 20-30 parts of EPDM, 20-30 parts of maleic anhydride grafted SEBS, 45-55 parts of white oil, 20-30 parts of modified silicon dioxide, 1-2 parts of antioxidant, and 1-2 parts of lubricant.

[0013] Further, the SEBS is a star-shaped structure SEBS; specifically, it is composed of high molecular weight SEBS with model number SEBS 604T and low molecular weight SEBS with model number SEBS 602T mixed at a mass ratio of 10:(1-3); the brands of both are Balin Petrochemical.

[0014] Further, the preparation method of the modified SBS is as follows:

[0015] (1) Under nitrogen protection, add SBS and perfluoroacrylate into toluene, stir and mix uniformly, and heat to 80-90℃, then add dicumyl peroxide, and keep stirring for 4-8h;

[0016] (2) Cool the reaction solution in (1) to 65-75℃, then add monohydrogen-terminated polydimethylsiloxane and 1wt% chloroplatinic acid isopropanol solution, stir for 2-4h, end the reaction, naturally cool the reaction solution to room temperature, remove the solvent by reduced pressure distillation, then wash with methanol and dry to obtain the modified SBS.

[0017] Further, the raw materials required for preparing the modified SBS include the following components: 20 parts of SBS, 4-6 parts of perfluoroacrylate, 2-4 parts of monohydrogen-terminated polydimethylsiloxane, 0.3-0.5 parts of dicumyl peroxide, 0.0002-0.0003 parts of chloroplatinic acid isopropanol solution, and 50 parts of toluene.

[0018] Further, the model number of the SBS is SBS YH-791, and the brand is Balin Petrochemical.

[0019] Further, the fluorocarbon chain length of the perfluoroacrylate is C4-C10.

[0020] Further, the fluorocarbon chain length of the perfluorinated acrylate is C6~C8; specifically including but not limited to one or more of the combination of perfluorohexyl ethyl acrylate, 2-(perfluorohexyl) ethyl methacrylate, 1H,1H-perfluorooctyl acrylate, 2-perfluorooctyl acrylate ethyl ester, 2-(perfluorooctyl) ethyl methacrylate.

[0021] Further, the EPDM is 3062EMF+, and the brand is Shanghai Sinopec Mitsubishi.

[0022] Further, the preparation method of the modified silica is:

[0023] (1) adding vinyl trimethoxysilane into 75wt% ethanol aqueous solution, adding acetic acid to adjust pH to 4~6, stirring and mixing for 20~60min to obtain a silane hydrolysis solution;

[0024] (2) immersing silica into the silane hydrolysis solution, soaking for 0.5~1.5h, taking out, and vacuum drying to obtain modified silica.

[0025] Further, the volume ratio of the vinyl trimethoxysilane and the ethanol aqueous solution is (0.04~0.08):1.

[0026] Further, the ratio of the silica and the silane hydrolysis solution is 1g:5mL.

[0027] Further, the antioxidant is antioxidant 168.

[0028] Further, the lubricant is calcium stearate.

[0029] Further, the related parameters of the screw extruder are: the extrusion temperature is 185~210℃, and the screw rotation speed is 200~400rpm.

[0030] Further, the related parameters of the plastic suction machine are: the mold temperature is 60~80℃, the vacuum degree is 10 -1 ~10 -3 Pa, and the pressure maintaining time is 8~15s.

[0031] Compared with the prior art, the beneficial effects achieved by the present application are:

[0032] (1) The SEBS with star structure is used as the main material in the application, and the reason for selecting the SEBS with star structure is that the SEBS with star structure has better wear resistance, corrosion resistance, temperature resistance and solvent resistance compared with the traditional linear SEBS, and is more in line with the performance requirements (wear resistance and corrosion resistance) required by the automobile trunk mat. The solvent resistance is the key to whether the material itself is durable for a long time, if the material has good solvent resistance, it is difficult for organic solvents such as engine oil to penetrate into the inside when the material is prepared into the automobile trunk mat, and the corrosion resistance and stain resistance of the SEBS are guaranteed. The SEBS with model SEBS 604T is selected as the main material in the application, which has a high molecular weight and is more easily entangled and interlaced, so its rigidity is also greater, and its wear resistance, corrosion resistance and solvent resistance are also better and excellent; in addition, the molecular chains in the SEBS are tightly entangled, which also increases the temperature resistance of the SEBS to a certain extent. However, considering that the SEBS 604T has poor processing fluidity due to the high molecular weight, the SEBS with model SEBS 602T is further added and mixed with it in the application to improve the processing fluidity of the SEBS 604T. At the same time, the styrene content in the two types of SEBS is relatively high, which further guarantees the rigidity of the SEBS. Finally, under the action of the two types of SEBS, the automobile trunk mat prepared in the application has better wear resistance, corrosion resistance, temperature resistance and stain resistance.

[0033] (2) In the application, perfluoroacrylate is further grafted onto SBS, and then a silicon-hydrogen addition reaction is carried out with monohydrogen-terminated polydimethylsiloxane to perform end-capping treatment, so as to prepare modified SBS. The fluorocarbon chain of the perfluoroacrylate used should be limited to C4-C10. If the fluorocarbon chain is too short (< C4), the modification degree of SBS is insufficient; if the fluorocarbon chain is too long, on the one hand, the processing difficulty of the modified SBS is increased, and on the other hand, the performance of the prepared modified SBS and the compatibility with SEBS will decrease significantly; meanwhile, the cost is also increased. In further experiments, the inventors found that the modified SBS prepared by using perfluoroacrylate with a fluorocarbon chain length of C6-C8 has the best performance. In order to ensure complete end-capping, the monohydrogen-terminated polydimethylsiloxane can be slightly excessive. After the reaction is completed, the remaining unreacted part can be used as a lubricant to improve the processing fluidity of SEBS; however, too much monohydrogen-terminated polydimethylsiloxane is not easy to add, and too much monohydrogen-terminated polydimethylsiloxane will also be more, and the compatibility of monohydrogen-terminated polydimethylsiloxane with SEBS is limited, and excessive monohydrogen-terminated polydimethylsiloxane will cause the performance of the material to decay, and the excessive monohydrogen-terminated polydimethylsiloxane will gradually migrate in the later stage, reducing the stain resistance of the prepared automobile trunk mat. The modified SBS prepared finally has good compatibility with SEBS, and the fluorine-containing segment contained therein can greatly endow the modified SBS with good heat resistance, thereby enhancing the heat resistance of SEBS; furthermore, the fluorine-containing segment also helps to reduce the surface energy of the mixed material, and lower surface energy can improve the stain resistance and water resistance of the automobile trunk mat; finally, the fluorine-containing segment can also enhance the acid and alkali resistance of SBS, thereby improving the corrosion resistance of SEBS; the polydimethylsiloxane segment can improve the processing fluidity of the mixed material on the one hand, and on the other hand, it also has a relatively low surface energy, which can synergistically enhance the stain resistance and water resistance of the automobile trunk mat with the fluorine-containing segment. In summary, the modified SBS can further improve the processing fluidity of SEBS, and also can enhance the heat resistance, water resistance, stain resistance and corrosion resistance of SEBS.

[0034] (3) In the application, EPDM is further added, which can enhance and modify the heat resistance and corrosion resistance of the SEBS material; meanwhile, maleic anhydride grafted SEBS is added as a compatibilizer to enhance the dispersibility of EPDM, modified SBS and modified silica in the mixed material.

[0035] (4) In the application, silica is introduced into the raw material components, which has the effect of improving the heat resistance, wear resistance and corrosion resistance of the SEBS material. After modification treatment by vinyltrimethylsilane, and under the action of maleic anhydride grafted SEBS, it has excellent dispersibility in the raw material and does not agglomerate, so that the prepared automobile trunk mat has excellent heat resistance, wear resistance and corrosion resistance.

[0036] In summary, through the synergistic effect of high and low molecular weight star-shaped SEBS compound, modified SBS, EPDM, maleic anhydride-grafted SEBS, and modified silica, a waterproof and corrosion-resistant car trunk mat with excellent properties such as waterproof, heat resistance, wear resistance, corrosion resistance, and stain resistance was comprehensively prepared. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that the following quantities are by weight, and there are no special restrictions on the suppliers of all raw materials involved in this invention. Exemplary examples include:

[0039] In the following examples, SEBS 604T has a B / S ratio of 67 / 33; SEBS 602T has a B / S ratio of 65 / 35; SBS YH-791 has a B / S ratio of 70 / 30; SBS YH-791 has a B / S ratio of 70 / 30; all are from Baling Petrochemical and were purchased from Dongguan Suju New Materials Co., Ltd.

[0040] Perfluorohexyl ethyl acrylate, CAS No. 17527-29-6, purity 99%; antioxidant 168, purity 99%; calcium stearate, purity 99%; silica, particle size 20nm, all purchased from Hubei Yongkuo Technology Co., Ltd.

[0041] Monohydrogen-terminated polydimethylsiloxane, CAS No. 1038821-58-7, viscosity 8~12cSt% (25℃), product number PB29814, purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd.

[0042] EPDM 3062EMF+, branded by Shanghai Sinopec Mitsui, purchased from Boruida (Dongguan) New Materials Co., Ltd.

[0043] Maleic anhydride-grafted SEBS, CAS number 88497-56-7, item number 5541254, was purchased from Dongguan Shenghao Plastic Raw Materials Co., Ltd., and all other raw materials were purchased from the market.

[0044] Example 1: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0045] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of 1H,1H-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0046] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0047] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0048] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0049] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0050] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0051] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0052] Example 2: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0053] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 12 parts of 1H,1H-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 6 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0054] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0055] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0056] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0057] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0058] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0059] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2Pa, holding time is 10s.

[0060] Example 3: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0061] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 18 parts of 1H,1H-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 12 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0062] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0063] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0064] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0065] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0066] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0067] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0068] Example 4: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0069] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of perfluorohexyl ethyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0070] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0071] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0072] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0073] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0074] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0075] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0076] Example 5: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0077] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0078] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0079] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0080] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0081] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0082] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0083] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0084] Example 6: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0085] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of perfluorobutyl ethyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0086] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0087] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0088] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0089] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0090] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0091] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0092] Example 7: A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0093] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorodecyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0094] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0095] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0096] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0097] Waterproof and corrosion-resistant car trunk mats consist of the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1681.5 parts antioxidant, and 1.5 parts calcium stearate.

[0098] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0099] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0100] The following is a control experiment based on Example 1, with comparative examples 1 to 5, as detailed below:

[0101] Comparative Example 1: Comparative Example 1 is based on Example 1, with the following adjustment: no modification treatment of SBS YH-791 is performed, while other processes remain unchanged. Specifically, it is a method for preparing a waterproof and corrosion-resistant car trunk mat:

[0102] Step 1: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1h, take it out, vacuum dry to obtain modified silica;

[0103] Step 2: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0104] 2. (1) Mix SEBS, SBS YH-791, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168, and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0105] The waterproof and corrosion-resistant car trunk mat comprises the following raw material components: by weight, SEBS 50 parts, SBS YH-791 60 parts, EPDM 25 parts, maleic anhydride-grafted SEBS 25 parts, white oil 50 parts, modified silica 25 parts, antioxidant 168 1.5 parts, and calcium stearate 1.5 parts;

[0106] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0107] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0108] Comparative Example 2: Comparative Example 2 is based on Example 1, with the following adjustments: only SEBS 604T type SEBS is used, while other processes remain unchanged. Specifically:

[0109] A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0110] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0111] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0112] Step 3: (1) Mix SEBS 604T, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, modified silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0113] The waterproof and corrosion-resistant car trunk mat comprises the following raw material components: by weight, 50 parts SEBS 604T, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1.5 parts antioxidant 168, and 1.5 parts calcium stearate;

[0114] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0115] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0116] Comparative Example 3: Comparative Example 3 is based on Example 1, with the following adjustment: EPDM is not added, while other processes remain unchanged. Specifically:

[0117] A method for preparing a waterproof and corrosion-resistant car trunk mat:

[0118] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0119] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0120] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0121] 2. (1) Mix SEBS, modified SBS, maleic anhydride-grafted SEBS, white oil, modified silica, antioxidant 168, and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0122] The waterproof and corrosion-resistant car trunk mat comprises the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts modified silica, 1.5 parts antioxidant 168, and 1.5 parts calcium stearate.

[0123] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0124] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0125] Comparative Example 4: Comparative Example 4 is based on Example 1, with the following adjustment: maleic anhydride-grafted SEBS is not added, while other processes remain unchanged. Specifically, it is a method for preparing a waterproof and corrosion-resistant car trunk mat.

[0126] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0127] Step 2: Preparation of modified silica: (1) Add vinyltrimethoxysilane to 75wt% ethanol aqueous solution (the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is 0.06:1), add acetic acid to adjust the pH to 5, stir and mix for 40 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysate (1g:5mL), soak for 1 h, take it out, vacuum dry to obtain modified silica;

[0128] Step 3: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0129] 2. (1) Mix SEBS, modified SBS, EPDM, white oil, modified silica, antioxidant 168 and calcium stearate evenly according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material with dimensions of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0130] The waterproof and corrosion-resistant car trunk mat comprises the following raw material components: by weight, 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 50 parts white oil, 25 parts modified silica, 1.5 parts antioxidant 168, and 1.5 parts calcium stearate.

[0131] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0132] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0133] Comparative Example 5: Comparative Example 5 is based on Example 1, with the following adjustment: no modification treatment is performed on silica, while other processes remain unchanged. Specifically, it is a method for preparing a waterproof and corrosion-resistant car trunk mat:

[0134] Step 1: Preparation of modified SBS: (1) Under nitrogen protection, 60 parts of SBS YH-791 and 15 parts of ethyl 2-perfluorooctyl acrylate were added to 150 parts of toluene, stirred and mixed evenly, and heated to 85°C. Then, 1.2 parts of dicumyl peroxide were added and the mixture was kept warm and stirred for 6 hours. (2) The reaction solution in (1) was cooled to 70°C, and 9 parts of monohydrogen-terminated polydimethylsiloxane and 0.00075 parts of 1wt% isopropanol chloroplatinate solution were added. The mixture was stirred for 3 hours and the reaction was stopped. The reaction solution was allowed to cool naturally to room temperature, and the solvent was removed by vacuum distillation. The solution was then washed with methanol and dried to obtain modified SBS.

[0135] Step 2: 1. Mix high molecular weight SEBS 604T and low molecular weight SEBS 602T at a mass ratio of 10:2 to obtain SEBS;

[0136] 2. (1) Mix SEBS, modified SBS, EPDM, maleic anhydride grafted SEBS, white oil, silica, antioxidant 168 and calcium stearate according to the formula ratio, then add them to the screw extruder for mixing and extrusion into sheets to obtain a waterproof and corrosion-resistant car trunk mat material of 115cm (length) × 85cm (width) × 3mm (thickness); (2) Heat the waterproof and corrosion-resistant car trunk mat material to 160℃, process it through a vacuum forming machine, and then cool it with water to obtain a waterproof and corrosion-resistant car trunk mat.

[0137] The waterproof and corrosion-resistant car trunk mat comprises the following raw material components by weight: 50 parts SEBS, 60 parts modified SBS, 25 parts EPDM, 25 parts maleic anhydride-grafted SEBS, 50 parts white oil, 25 parts silica, 1.5 parts antioxidant 168, and 1.5 parts calcium stearate.

[0138] The relevant parameters for the screw extruder are: extrusion temperature of 200℃ and screw speed of 300rpm;

[0139] The relevant parameters for the vacuum forming machine are: mold temperature 70℃, vacuum degree 10. -2 Pa, holding time is 10s.

[0140] Performance testing: The waterproof and corrosion-resistant car trunk mats prepared in Examples 1-7 and Comparative Examples 1-5 were subjected to the following performance tests, as detailed below:

[0141] (1) Waterproof performance test: According to GB / T 30693-2014 standard, under the environment of 23±2℃ temperature and 50±5% relative humidity, 3μL water droplets were transferred to the waterproof and corrosion resistant car trunk mat corresponding to each example, and the contact angle between the water droplet and the sample surface was tested.

[0142] (2) Tensile property test: According to the standard GB / T 528-2009, the waterproof and corrosion resistant car trunk mats corresponding to each example were cut into sample sizes of 11.5cm×6cm×3mm, and tensile tests were conducted at a tensile speed of 200mm / min to test their tensile strength.

[0143] (3) Corrosion resistance test: According to ASTM D543 standard, in an environment of 23±2℃ and 50±5% relative humidity, the waterproof and corrosion resistant car trunk mats corresponding to each example were cut into sample sizes of 11.5cm×6cm×3mm. The samples were then immersed in 5% acetic acid solution and 10% ammonium hydroxide solution for 48h, respectively. After being taken out, the tensile properties were finally tested.

[0144] (4) Heat resistance test: The waterproof and corrosion resistant car trunk mats corresponding to each example were cut into sample sizes of 11.5cm×6cm×3mm. The samples were placed in a vacuum drying oven at 90℃ for 24 hours, and then taken out for tensile performance test.

[0145] (5) Wear resistance test: Using CS-10 grinding wheel, under a load of 500g, at a speed of 100rpm, after 1 hour, the wear amount is calculated.

[0146] The data results for the above test items are shown in Table 1 below:

[0147] Table 1

[0148]

[0149] Results Analysis: As can be seen from the data in Table 1 above, Examples 1, 4, and 5 of this invention exhibit better performance compared to other examples and comparative examples, with Example 5 showing the best performance. This indicates that this invention, through the synergistic effect of high and low molecular weight star-shaped SEBS compound, modified SBS, EPDM, maleic anhydride-grafted SEBS, and modified silica, comprehensively prepares a waterproof and corrosion-resistant car trunk mat with excellent waterproof, heat-resistant, wear-resistant, and corrosion-resistant properties.

[0150] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a waterproof and corrosion-resistant car trunk mat, characterized in that: Includes the following steps: Step 1: Graft perfluoroacrylate onto SBS, and then react it with monohydrogen-terminated polydimethylsiloxane to prepare modified SBS. Step 2: Modify silica with vinyltrimethoxysilane to obtain modified silica; Step 3: (1) Mix the raw material components of the waterproof and corrosion resistant car trunk mat evenly according to the formula ratio, then add them into the screw extruder for mixing and extrusion into sheets to obtain the waterproof and corrosion resistant car trunk mat sheet. (2) After heating the waterproof and corrosion-resistant car trunk mat sheet, it is processed by a vacuum forming machine and then water-cooled to obtain the waterproof and corrosion-resistant car trunk mat. The waterproof and corrosion-resistant car trunk mat comprises the following raw material components: by weight, 50 parts SEBS, 50-70 parts modified SBS, 20-30 parts EPDM, 20-30 parts maleic anhydride-grafted SEBS, 45-55 parts white oil, 20-30 parts modified silica, 1-2 parts antioxidant, and 1-2 parts lubricant; The SEBS in question is a star-shaped SEBS; specifically, it is composed of a high molecular weight SEBS of type SEBS 604T and a low molecular weight SEBS of type SEBS 602T mixed in a mass ratio of 10:(1~3); both are branded by Baling Petrochemical. The method for preparing the modified SBS is as follows: (1) Under nitrogen protection, SBS and perfluoroacrylate were added to toluene, stirred and mixed evenly, and heated to 80~90℃. Then dicumyl peroxide was added and the mixture was kept warm and stirred for 4~8h. (2) Cool the reaction solution in (1) to 65~75℃, then add monohydrogen-terminated polydimethylsiloxane and 1wt% isopropanol chloroplatinic acid solution to it, stir the reaction for 2~4h, stop the reaction, let the reaction solution cool naturally to room temperature, remove the solvent by vacuum distillation, then wash with methanol and dry to obtain modified SBS; The raw materials required for the preparation of the modified SBS include the following components: by weight, 20 parts SBS, 4-6 parts perfluoroacrylate, 2-4 parts monohydrogen-terminated polydimethylsiloxane, 0.3-0.5 parts dicumyl peroxide, 0.0002-0.0003 parts isopropanol chloroplatinate solution, and 50 parts toluene; wherein, the SBS is model SBS YH-791, brand Baling Petrochemical; the fluorocarbon chain length of the perfluoroacrylate is C4-C10.

2. The method for preparing a waterproof and corrosion-resistant car trunk mat according to claim 1, characterized in that: The fluoroacrylate has a fluorocarbon chain length of C6 to C8; specifically, it includes one or more combinations of perfluorohexyl ethyl acrylate, 2-(perfluorohexyl)ethyl methacrylate, 1H,1H-perfluorooctyl acrylate, ethyl 2-perfluorooctyl acrylate, and 2-(perfluorooctyl)ethyl methacrylate.

3. The method for preparing a waterproof and corrosion-resistant car trunk mat according to claim 1, characterized in that: The grade of the EPDM is 3062EMF+, and the brand is Shanghai Sinopec Mitsui.

4. The method for preparing a waterproof and corrosion-resistant car trunk mat according to claim 1, characterized in that: The method for preparing the modified silica is as follows: (1) Add vinyltrimethoxysilane to a 75wt% aqueous ethanol solution, add acetic acid to adjust the pH to 4-6, stir and mix for 20-60 min to obtain silane hydrolysate; (2) Immerse silica in silane hydrolysis solution for 0.5-1.5 h, remove and vacuum dry to obtain modified silica; the volume ratio of vinyltrimethoxysilane and ethanol aqueous solution is (0.04-0.08):

1. The ratio of silicon dioxide to silane hydrolysate is 1g:5mL.

5. The method for preparing a waterproof and corrosion-resistant car trunk mat according to claim 1, characterized in that: The antioxidant is antioxidant 168; The lubricant is calcium stearate.

6. The method for preparing a waterproof and corrosion-resistant car trunk mat according to claim 1, characterized in that: The relevant parameters of the screw extruder are: extrusion temperature of 185~210℃ and screw speed of 200~400rpm; The relevant parameters of the vacuum forming machine are: mold temperature 60~80℃, vacuum degree 10. -1 ~10 -3 Pa, holding time is 8~15s.

7. A waterproof and corrosion-resistant car trunk mat prepared by any one of the preparation methods of a waterproof and corrosion-resistant car trunk mat according to any one of claims 1 to 6.

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