A method for efficient modification of automotive interior composite materials

Abstract

This invention relates to a highly efficient modification method for automotive interior composite materials, belonging to the field of composite material technology. The invention integrates the functions of the ultraviolet absorber Bason 1789 and the hindered amine light stabilizer precursor tetramethylpiperidone at the molecular level through a chemical reaction. Utilizing the active methylene structure of Bason 1789 and the carbonyl structure of tetramethylpiperidone, a novel light stabilizer is obtained through a Krono Wenger reaction under the action of an organic amine catalyst. This simplifies the synthesis steps of preparing light stabilizers from tetramethylpiperidone and enhances the synergistic effect between the ultraviolet absorber and the light stabilizer. Furthermore, by compounding ASA resin with SAN resin, the invention effectively solves the problem of yellowing and embrittlement caused by photo-oxidative degradation of SAN resin under long-term exposure to sunlight, improving the weather resistance of SAN resin. While retaining the rigidity of SAN resin, it further enhances the impact resistance and weather resistance of automotive interior materials.

Description

Technical Field

[0001] This invention belongs to the field of composite material technology, specifically, it relates to an efficient modification method for automotive interior composite materials. Background Technology

[0002] With the development of the automotive industry, modern cars are often equipped with sunroofs that allow light to pass through. Sunroofs greatly improve the user's driving experience and can also achieve a comprehensive balance between temperature regulation and light control. However, the more abundant light conditions also place higher demands on the weather resistance of automotive interior materials. Under long-term direct sunlight, the polymer materials in automotive interiors are prone to photo-oxidation reactions, which can lead to molecular chain breakage, causing surface yellowing, fading, and a decline in mechanical properties, seriously affecting the long-term user experience of automotive interiors. Based on this, the present invention provides an efficient modification method for automotive interior composite materials. Summary of the Invention

[0003] The purpose of this invention is to provide an efficient modification method for automotive interior composite materials, which solves the problems mentioned in the background art.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A method for efficient modification of automotive interior composite materials includes the following steps:

[0006] Step 1: Dissolve 2 parts of Bason 1789, 0.8-1.2 parts of tetramethylpiperidone, and 0.05-0.1 parts of catalyst in an organic solvent and stir until homogeneous. After reacting at a controlled temperature of 40-110℃, the mixture is distilled under reduced pressure and recrystallized to obtain a light stabilizer.

[0007] Step 2: According to the mass fraction, add 10-14 parts of butyl acrylate, 0.4-0.6 parts of emulsifier, 0.04-0.16 parts of initiator, 0.2-0.5 parts of crosslinking agent, and 24-36 parts of deionized water to a reaction vessel and stir continuously. Purge the air in the vessel with nitrogen gas and control the system temperature at 60-80℃ for 4-12 hours to obtain polybutyl acrylate seeds.

[0008] Step 3: Take 10 parts of polybutyl acrylate seeds by mass and dilute them with deionized water to 8-18 times. Add 0.2-0.4 parts of emulsifier, 1.2-1.8 parts of sodium formaldehyde sulfoxylate, and 0.1-0.3 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 60-80℃ for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by adding 0.5-2.2 parts of crosslinking agent, 0.1-0.4 parts of oxidant, 80-180 parts of butyl acrylate, and 0.3-0.5 parts of emulsifier to the reaction vessel. The adding time is 1-2 hours. After the addition is completed, continue the reaction for 1-2 hours to obtain a large-particle-size PBA emulsion.

[0009] Step 4: Add 0.1–0.4 parts emulsifier, 1–1.6 parts sodium formaldehyde sulfoxylate, and 0.1–0.3 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by weight. Control the system temperature at 40–70°C for the reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 25–75 parts styrene, 10–24 parts acrylonitrile, 0.3–0.6 parts light stabilizer, 0.3–0.8 parts molecular weight regulator, and 0.8–1.2 parts oxidant to the reaction vessel. The addition time is 1–4 hours. After the addition is completed, continue the reaction for 2–8 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, the modified ASA resin is obtained.

[0010] Step 5: According to the mass percentage, add 20-30 parts of modified ASA resin, 70-80 parts of SAN resin, and 0.1-0.6 parts of antioxidant to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture using a twin-screw extruder to obtain the automotive interior composite material.

[0011] Furthermore, the composition of the Bason 1789 is 4'-tert-butyl-4-methoxydibenzoylmethane.

[0012] Furthermore, the catalyst is an organic amine catalyst, preferably piperidine.

[0013] Furthermore, the emulsifier is one of sodium dodecyl sulfate and sodium dodecyl sulfonate, preferably sodium dodecyl sulfate.

[0014] Furthermore, the initiator is one of potassium persulfate, ammonium persulfate, and sodium persulfate, preferably potassium persulfate.

[0015] Furthermore, the crosslinking agent is one of triallyl isocyanurate, ethylene glycol dimethacrylate, and butylene diacrylate, preferably triallyl isocyanurate.

[0016] Furthermore, the oxidant is one of isopropyl hydroperoxide, lauroyl peroxide, and tert-butyl peroxide, preferably isopropyl hydroperoxide.

[0017] Furthermore, the molecular weight regulator is one of n-dodecyl mercaptan or tert-dodecyl mercaptan.

[0018] Furthermore, the antioxidant is one of antioxidant 1010, antioxidant 1078, and butylated hydroxyanisole, preferably antioxidant 1010.

[0019] Furthermore, the SAN resin is a styrene-acrylonitrile copolymer with a styrene content of 70-80 wt%.

[0020] The beneficial effects of this invention are:

[0021] 1) This invention integrates the functions of the ultraviolet absorber Bason 1789 and the hindered amine light stabilizer precursor tetramethylpiperidone at the molecular level through a chemical reaction. Utilizing the active methylene structure of Bason 1789 and the carbonyl structure of tetramethylpiperidone, a novel light stabilizer is obtained through a Krono Wenger reaction under the action of an organic amine catalyst. This simplifies the synthetic steps for preparing light stabilizers from tetramethylpiperidone and enhances the synergistic effect between the ultraviolet absorber and the light stabilizer. It achieves a synergistic effect of energy conversion (ultraviolet absorber) and free radical blocking (hindered amine light stabilizer), significantly improving the light stability of the composite material. In addition, the prepared light stabilizer contains polymerizable double bonds that can be chemically bonded within the polybutyl acrylate core, reducing migration loss of the light stabilizer during processing and use. The final composite material exhibits long-lasting weather resistance.

[0022] 2) SAN resin has good mechanical properties and excellent chemical stability, but it is brittle and has poor weather resistance. This invention combines modified ASA resin and SAN resin. The modified ASA resin itself is not easily oxidized and is grafted with light stabilizers, which can effectively solve the problem of yellowing and embrittlement caused by photo-oxidative degradation of SAN resin under long-term exposure to sunlight, thus improving the weather resistance of SAN resin. In addition, ASA resin has good elasticity and similar polarity to SAN resin, which can further improve the impact resistance of automotive interior while retaining the mechanical properties of SAN resin. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] A method for efficient modification of automotive interior composite materials includes the following steps:

[0026] Step 1: Dissolve 2 parts of Bason 1789, 1 part of tetramethylpiperidone, and 0.05-0.1 parts of piperidine in 40 parts of anhydrous ethanol by mass and stir until homogeneous. Control the system temperature at 80℃ and react for 1 hour. After the reaction is completed, distill under reduced pressure and recrystallize to obtain a light stabilizer.

[0027] Step 2: According to the mass fraction, add 12 parts butyl acrylate, 0.5 parts sodium dodecyl sulfate, 0.1 parts potassium persulfate, 0.35 parts triallyl isocyanurate, and 30 parts deionized water to the reaction vessel and stir continuously. Purge the air in the vessel with nitrogen and control the system temperature at 70°C for 8 hours to obtain polybutyl acrylate seeds.

[0028] Step 3: Take 10 parts of polybutyl acrylate seed by mass and dilute with 120 parts of deionized water. Add 0.3 parts of sodium dodecyl sulfate, 1.5 parts of sodium formaldehyde sulfoxylate, and 0.2 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 70°C for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 1.35 parts of triallyl isocyanurate, 0.25 parts of isophenylene peroxide, 130 parts of butyl acrylate, and 0.4 parts of sodium dodecyl sulfate to the reaction vessel. The addition time is 1.5 hours. After the addition is completed, continue the reaction for 1.5 hours to obtain a large-particle-size PBA emulsion.

[0029] Step 4: Add 0.25 parts sodium dodecyl sulfate, 1.3 parts sodium formaldehyde sulfoxylate, and 0.2 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by mass. Control the system temperature at 55°C for reaction. During the reaction, continuously add a pre-emulsion prepared from 50 parts styrene, 17 parts acrylonitrile, 0.45 parts light stabilizer, 0.55 parts n-dodecyl mercaptan, and 1 part isophenylene peroxide dropwise to the reaction vessel over a period of 2.5 hours. After the addition is complete, continue the reaction for 5 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, the modified ASA resin is obtained.

[0030] Step 5: According to the mass percentage, add 25 parts of modified ASA resin, 75 parts of SAN resin, and 0.35 parts of antioxidant 1010 to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture through a twin-screw extruder to obtain the automotive interior composite material.

[0031] In this embodiment, the styrene content of the SAN resin is 75 wt%.

[0032] Example 2

[0033] A method for efficient modification of automotive interior composite materials includes the following steps:

[0034] Step 1: According to the mass fraction, dissolve 2 parts of Bason 1789, 1.2 parts of tetramethylpiperidone, and 0.1 parts of tetrahydropyrrole in 45 parts of N,N-dimethylformamide and stir evenly. Control the system temperature at 110℃ and react for 0.5h. After vacuum distillation, recrystallize to obtain a light stabilizer.

[0035] Step 2: According to the mass fraction, add 14 parts butyl acrylate, 0.6 parts sodium dodecyl sulfate, 0.04-0.16 parts ammonium persulfate, 0.5 parts ethylene glycol dimethacrylate, and 36 parts deionized water into a reaction vessel and stir continuously. Purge nitrogen gas to purge the air in the vessel and control the system temperature at 80℃ for 12 hours to obtain polybutyl acrylate seeds.

[0036] Step 3: Take 10 parts of polybutyl acrylate seed by mass and dilute with 170 parts of deionized water. Add 0.4 parts of sodium dodecyl sulfate, 1.8 parts of sodium formaldehyde sulfoxylate, and 0.3 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 80℃ for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 2.2 parts of ethylene glycol dimethacrylate, 0.4 parts of lauroyl peroxide, 180 parts of butyl acrylate, and 0.5 parts of sodium dodecyl sulfate to the reaction vessel. The addition time is 2 hours. After the addition is completed, continue the reaction for 2 hours to obtain a large-particle-size PBA emulsion.

[0037] Step 4: Add 0.4 parts sodium dodecyl sulfate, 1.6 parts sodium formaldehyde sulfoxylate, and 0.3 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by mass. Control the system temperature at 70°C for reaction. During the reaction, continuously add a pre-emulsion prepared from 75 parts styrene, 24 parts acrylonitrile, 0.6 parts light stabilizer, 0.8 parts n-dodecyl mercaptan, and 1.2 parts lauroyl peroxide to the reaction vessel over a period of 4 hours. After the addition is complete, continue the reaction for 8 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, the modified ASA resin is obtained.

[0038] Step 5: According to the mass percentage, add 30 parts of modified ASA resin, 70 parts of SAN resin, and 0.6 parts of antioxidant 1078 to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture through a twin-screw extruder to obtain the automotive interior composite material.

[0039] In this embodiment, the styrene content of the SAN resin is 70 wt%.

[0040] Example 3

[0041] A method for efficient modification of automotive interior composite materials includes the following steps:

[0042] Step 1: Dissolve 2 parts of Bason 1789, 0.8 parts of tetramethylpiperidone, and 0.05 parts of diethylamine in 60 parts of dichloromethane and stir until homogeneous. Control the system temperature at 40℃ and react for 8 hours. Then, distill under reduced pressure and recrystallize to obtain a light stabilizer.

[0043] Step 2: According to the mass fraction, add 10 parts butyl acrylate, 0.4 parts sodium dodecyl sulfonate, 0.04 parts sodium persulfate, 0.2 parts butyl diacrylate, and 24 parts deionized water to the reaction vessel and stir continuously. Purge the air in the vessel with nitrogen and control the system temperature at 60°C for 4 hours to obtain polybutyl acrylate seeds.

[0044] Step 3: Take 10 parts of polybutyl acrylate seed by mass and dilute with 70 parts of deionized water. Add 0.2 parts of sodium dodecyl sulfonate, 1.2 parts of sodium formaldehyde sulfoxylate, and 0.1 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 60°C for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 0.5 parts of butyl diacrylate, 0.1 parts of tert-butyl peroxide, 80 parts of butyl acrylate, and 0.3 parts of sodium dodecyl sulfonate to the reaction vessel. The addition time is 1 hour. After the addition is completed, continue the reaction for 1 hour to obtain a large-particle-size PBA emulsion.

[0045] Step 4: Add 0.1 parts sodium dodecyl sulfonate, 1 part sodium formaldehyde sulfoxylate, and 0.1 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by mass. Control the system temperature at 40°C for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 25 parts styrene, 10 parts acrylonitrile, 0.3 parts light stabilizer, 0.3 parts tert-dodecyl mercaptan, and 0.8 parts tert-butyl peroxide to the reaction vessel. The addition time is 1 hour. After the addition is completed, continue the reaction for 2 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, the modified ASA resin is obtained.

[0046] Step 5: According to the mass percentage, add 20 parts of modified ASA resin, 80 parts of SAN resin, and 0.1 parts of butylated hydroxyanisole to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture using a twin-screw extruder to obtain the automotive interior composite material.

[0047] In this embodiment, the styrene content of the SAN resin is 80 wt%.

[0048] Example 4

[0049] The difference between this embodiment and Embodiment 1 is that grafting is not performed; instead, the light stabilizer is added through blending.

[0050] A method for efficient modification of automotive interior composite materials includes the following steps:

[0051] Step 1: Dissolve 2 parts of Bason 1789, 1 part of tetramethylpiperidone, and 0.05-0.1 parts of piperidine in 40 parts of anhydrous ethanol by mass and stir until homogeneous. Control the system temperature at 80℃ and react for 1 hour. After the reaction is completed, distill under reduced pressure and recrystallize to obtain a light stabilizer.

[0052] Step 2: According to the mass fraction, add 12 parts butyl acrylate, 0.5 parts sodium dodecyl sulfate, 0.1 parts potassium persulfate, 0.35 parts triallyl isocyanurate, and 30 parts deionized water to the reaction vessel and stir continuously. Purge the air in the vessel with nitrogen and control the system temperature at 70°C for 8 hours to obtain polybutyl acrylate seeds.

[0053] Step 3: Take 10 parts of polybutyl acrylate seed by mass and dilute with 120 parts of deionized water. Add 0.3 parts of sodium dodecyl sulfate, 1.5 parts of sodium formaldehyde sulfoxylate, and 0.2 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 70°C for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 1.35 parts of triallyl isocyanurate, 0.25 parts of isophenylene peroxide, 130 parts of butyl acrylate, and 0.4 parts of sodium dodecyl sulfate to the reaction vessel. The addition time is 1.5 hours. After the addition is completed, continue the reaction for 1.5 hours to obtain a large-particle-size PBA emulsion.

[0054] Step 4: Add 0.25 parts sodium dodecyl sulfate, 1.3 parts sodium formaldehyde sulfoxylate, and 0.2 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by mass. Control the system temperature at 55°C for reaction. During the reaction, continuously add a pre-emulsion prepared from 50 parts styrene, 17 parts acrylonitrile, 0.55 parts n-dodecyl mercaptan, and 1 part isophenylene peroxide dropwise to the reaction vessel over a period of 2.5 hours. After the addition is complete, continue the reaction for 5 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, obtain the ASA resin.

[0055] Step 5: According to the mass percentage, add 25 parts ASA resin, 75 parts SAN resin, 0.45 parts light stabilizer, and 0.35 parts antioxidant 1010 to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture through a twin-screw extruder to obtain the automotive interior composite material.

[0056] In this embodiment, the styrene content of the SAN resin is 75 wt%.

[0057] Example 5

[0058] The difference between this embodiment and Example 1 is that the light stabilizer is not synthesized in advance, but rather Basong 1789 and tetramethylpiperidone are added by blending.

[0059] A method for efficient modification of automotive interior composite materials includes the following steps:

[0060] Step 1: According to the mass fraction, add 12 parts butyl acrylate, 0.5 parts sodium dodecyl sulfate, 0.1 parts potassium persulfate, 0.35 parts triallyl isocyanurate, and 30 parts deionized water to a reaction vessel and stir continuously. Purge the air in the vessel with nitrogen and control the system temperature at 70°C for 8 hours to obtain polybutyl acrylate seeds.

[0061] Step 2: Take 10 parts of polybutyl acrylate seed by mass and dilute with 120 parts of deionized water. Add 0.3 parts of sodium dodecyl sulfate, 1.5 parts of sodium formaldehyde sulfoxylate, and 0.2 parts of tetrasodium ethylenediaminetetraacetate to the reaction vessel. Control the system temperature at 70°C for reaction. During the reaction, continuously add a pre-emulsion prepared in advance by 1.35 parts of triallyl isocyanurate, 0.25 parts of isophenylene peroxide, 130 parts of butyl acrylate, and 0.4 parts of sodium dodecyl sulfate to the reaction vessel. The addition time is 1.5 hours. After the addition is completed, continue the reaction for 1.5 hours to obtain a large-particle-size PBA emulsion.

[0062] Step 3: Add 0.25 parts sodium dodecyl sulfate, 1.3 parts sodium formaldehyde sulfoxylate, and 0.2 parts tetrasodium ethylenediaminetetraacetate to the PBA emulsion by mass. Control the system temperature at 55°C for reaction. During the reaction, continuously add a pre-emulsion prepared from 50 parts styrene, 17 parts acrylonitrile, 0.55 parts n-dodecyl mercaptan, and 1 part isophenylene peroxide dropwise to the reaction vessel over a period of 2.5 hours. After the addition is complete, continue the reaction for 5 hours to obtain the modified ASA emulsion. After demulsification, washing with water, filtration, and drying, obtain the ASA resin.

[0063] Step 4: According to the mass percentage, add 25 parts ASA resin, 75 parts SAN resin, 0.3 parts Bacon 1789, 0.15 parts tetramethylpiperidone, and 0.35 parts antioxidant 1010 to a high-speed mixer and mix evenly. Then, extrude and granulate the mixture using a twin-screw extruder to obtain the automotive interior composite material.

[0064] In this embodiment, the styrene content of the SAN resin is 75 wt%.

[0065] Comparative Example 1

[0066] This comparative example uses commercially available ASA resin.

[0067] Experimental Example 1

[0068] The automotive interior composite materials obtained in Examples 1-5 were subjected to the following performance tests:

[0069] Impact resistance test: The test was conducted in accordance with the national standard GB / T 40440-2021 "Requirements and test methods for impact-modified acrylonitrile-styrene copolymer (ABS, AEPDS and ASA) extruded sheets".

[0070] Rockwell hardness test: The test was conducted in accordance with the national standard GB / T 3398.2-2008 "Determination of hardness of plastics - Part 2: Rockwell hardness";

[0071] Tensile strength test: The test was conducted in accordance with the national standard GB / T 1040.1-2018 "Determination of tensile properties of plastics - Part 1: General".

[0072] UV resistance test: Accelerated UV aging test was conducted according to national standard GB / T 16422.3 "Laboratory Light Exposure Test Methods for Plastics - Part 3: Fluorescent UV Lamps". The yellowing value ΔE after 4000 hours of UV irradiation was tested and recorded. The test results are shown in Table 1.

[0073] Table 1

[0074] project <![CDATA[Impact strength KJ / m 2 > Rockwell hardness Tensile strength (MPa) 4000 △E Example 1 14.8 94 72.36 1.45 Example 2 15.2 96 71.62 1.73 Example 3 13.6 91 75.28 2.04 Example 4 14.4 93 72.45 2.67 Example 5 14.1 94 73.12 6.42 Comparative Example 1 15.4 98 46.32 2.44

[0075] As can be seen from Table 1, the automotive interior composite materials of the present invention in Examples 1 to 3 have good impact resistance and surface hardness, and good weather resistance.

[0076] The above provides a detailed description of an efficient modification method for automotive interior composite materials provided by this invention. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this invention, including the best mode, and also to enable any person skilled in the art to practice this invention, including manufacturing and using any device or system, and implementing any combination method. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-efficiency modification method of automotive interior composite material, characterized in that, The method comprises the following steps: Synthesis of the light stabilizer: dissolve the Hostavin 1789, tetramethyl piperidone, and organic amine catalyst in an organic solvent, and then control the reaction temperature at 40-110 DEG C to obtain the light stabilizer; Preparation of the automotive interior composite material: add emulsifier, sodium formaldehyde sulfoxylate, ethylenediaminetetraacetic acid tetrasodium salt, styrene, acrylonitrile, the light stabilizer, molecular weight regulator, and oxidant to the polybutyl acrylate emulsion, control the system temperature at 40-70 DEG C to react, and obtain the modified ASA resin; Blend and extrude the modified ASA resin, SAN resin, and antioxidant to obtain the automotive interior composite material. In the synthesis of the light stabilizer, the mass fraction of each raw material is 2 parts of Hostavin 1789, 0.8-1.2 parts of tetramethyl piperidone, and 0.05-0.1 part of organic amine catalyst.

2. The method according to claim 1, wherein the method is characterized by, The method comprises the following steps: First step: dissolve and uniformly stir 2 parts of Hostavin 1789, 0.8-1.2 parts of tetramethyl piperidone, and 0.05-0.1 part of catalyst in an organic solvent, control the system temperature at 40-110 DEG C to react, and then perform vacuum distillation and recrystallization to obtain a light stabilizer; Second step: add 10-14 parts of butyl acrylate, 0.4-0.6 parts of emulsifier, 0.04-0.16 parts of initiator, 0.2-0.5 parts of crosslinking agent, and 24-36 parts of deionized water to a reaction container and continuously stir and mix, introduce nitrogen to exhaust the air in the container, control the system temperature at 60-80 DEG C to react for 4-12 hours, and obtain polybutyl acrylate seeds; Third step: take out 10 parts of polybutyl acrylate seeds, dilute them in deionized water to 8-18 times, add 0.2-0.4 parts of emulsifier, 1.2-1.8 parts of sodium formaldehyde sulfoxylate, and 0.1-0.3 parts of ethylenediaminetetraacetic acid tetrasodium salt to the reaction container, control the system temperature at 60-80 DEG C to react, continuously add a pre-emulsion prepared from 0.5-2.2 parts of crosslinking agent, 0.1-0.4 parts of oxidant, 80-180 parts of butyl acrylate, and 0.3-0.5 parts of emulsifier to the reaction container dropwise during the reaction, the dropwise adding time is 1-2 hours, and the reaction continues for 1-2 hours after the dropwise adding is completed to obtain a large-particle-size polybutyl acrylate emulsion; Fourth step: add 0.1-0.4 parts of emulsifier, 1-1.6 parts of sodium formaldehyde sulfoxylate, and 0.1-0.3 parts of ethylenediaminetetraacetic acid tetrasodium salt to the polybutyl acrylate emulsion, control the system temperature at 40-70 DEG C to react, continuously add a pre-emulsion prepared from 25-75 parts of styrene, 10-24 parts of acrylonitrile, 0.3-0.6 parts of light stabilizer, 0.3-0.8 parts of molecular weight regulator, and 0.8-1.2 parts of oxidant to the reaction container dropwise during the reaction, the dropwise adding time is 1-4 hours, and the reaction continues for 2-8 hours after the dropwise adding is completed to obtain a modified ASA emulsion, which is subjected to demulsification, water washing, filtration, and drying to obtain a modified ASA resin; The fifth step, by mass fraction, 20-30 parts of modified ASA resin, 70-80 parts of SAN resin, 0.1-0.6 parts of antioxidant are added into a high-speed mixer and uniformly mixed, and then extruded and granulated by a double screw extruder to obtain the automobile interior composite material.

3. The method according to claim 2, wherein the method is characterized by, The emulsifier is one of sodium dodecyl sulfate and sodium dodecyl sulfonate.

4. The efficient modification method of the automotive interior composite material according to claim 2, characterized in that, The initiator is one of potassium persulfate, ammonium persulfate and sodium persulfate.

5. The efficient modification method of the automotive interior composite material according to claim 2, characterized in that, The crosslinking agent is one of triallyl isocyanurate, ethylene glycol dimethacrylate and butylene glycol diacrylate.

6. The efficient modification method of an automotive interior composite material according to claim 2, characterized in that, The oxidizing agent is one of cumene hydroperoxide, lauroyl peroxide and tert-butyl peroxybenzoate.

7. The method of claim 2, wherein the method is characterized by, The molecular weight regulator is one of n-dodecanethiol and tert-dodecanethiol.

8. The method of claim 2, wherein the method is characterized by, The SAN resin is a styrene-acrylonitrile copolymer, and the styrene content is 70-80wt%.

9. The efficient modification method of an automotive interior composite material according to claim 2, characterized in that, The antioxidant is one of antioxidant 1010 and butylated hydroxyanisole.