Anti-aging plastic composite material and preparation method thereof

Abstract

The invention relates to the technical field of plastic composite materials, and discloses an anti-aging plastic composite material and a preparation method thereof, and the preparation method specifically comprises the following steps: synthesizing an anti-aging silane coupling agent and an aldehyde anti-aging silane coupling agent; on the basis of a silicon hydroxyl-hydroxyl condensation reaction mechanism, an aging-resistant silane coupling agent and an aldehyde aging-resistant silane coupling agent are jointly modified on the surfaces of rutile type TiO2 nanoparticles, and then on the basis of an aldehyde-amino Schiff base reaction mechanism, TiO2 nanoparticles with aldehyde functional groups loaded on the surfaces are compounded with amino-functionalized kaolin, so that the anti-aging kaolin composite material is prepared. The anti-aging modification reagent is prepared; on the basis of pi-pi stacking action, an anti-aging modification reagent and SBR rubber are compounded, anti-aging SBR rubber particles are prepared through a crushing process, the anti-aging SBR rubber particles and a polyurethane adhesive are compounded to prepare the anti-aging plastic composite material, and the anti-aging plastic composite material shows excellent light-oxygen aging resistance and thermo-oxygen aging resistance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of plastic composite materials, in particular to an anti-aging plastic composite material and a preparation method. BACKGROUND

[0002] The plastic composite material prepared from rubber particles and a polyurethane adhesive has elasticity, wear resistance and bonding strength of the polyurethane, is an elastic material with balanced performance, and is suitable for scenes with high requirements on elasticity, skid resistance, shock absorption and wear resistance. The SBR rubber (styrene butadiene rubber) particles gradually become an important choice in the plastic composite material because of large output (global annual production capacity is more than 5 million tons), low price (the price is only 60-70% of that of natural rubber and 50-60% of that of EPDM rubber), good wear resistance and moderate elasticity.

[0003] Research shows that the anti-aging ability of SBR rubber is limited, a large number of unsaturated double bonds exist in the molecular chain of the SBR rubber, the SBR rubber is easily attacked by oxygen, ozone and ultraviolet light, oxidation degradation (molecular chain rupture) or crosslinking (molecular chain excessive connection) is caused, and the performance of the material gradually decreases, so that the plastic product prepared therefrom is prone to discoloration, whitening, softening and sticking, hardening and cracking, and the like. Therefore, research on the anti-aging SBR rubber has important application value for the plastic composite material product. SUMMARY

[0004] The application provides an anti-aging plastic composite material, which is prepared by introducing an anti-aging component into SBR rubber through a chemical modification method to improve the anti-aging ability of the SBR rubber, and then compounding the SBR rubber with a polyurethane adhesive to obtain a high-performance plastic composite material.

[0005] A preparation method of an anti-aging plastic composite material, comprising the following steps:

[0006] Step one: synthesizing an anti-aging silane coupling agent and an aldehyde-based anti-aging silane coupling agent;

[0007] Step two: based on a silicon hydroxyl-hydroxyl condensation reaction mechanism, the anti-aging silane coupling agent and the aldehyde-based anti-aging silane coupling agent are jointly modified to the surface of rutile TiO2 nanoparticles, and then based on an aldehyde group-amino Schiff base reaction mechanism, the TiO2 nanoparticles loaded with the aldehyde group functional group are compounded with amino-functionalized kaolin to obtain an anti-aging modification reagent;

[0008] Step three: based on a pi-pi stacking effect, the anti-aging modification reagent is compounded with SBR rubber, and an anti-aging SBR rubber particle is prepared through a crushing process, and the anti-aging SBR rubber particle is compounded with a polyurethane adhesive to obtain an anti-aging plastic composite material.

[0009] Preferably, the preparation method of the anti-aging silane coupling agent is as follows: through nucleophilic substitution reaction of 1 mole equivalent of -NH2 functional group of 2,2,6,6-tetramethylpiperidinamine and 0.91-0.99 mole equivalent of chlorine functional group of 3-chloropropyltrimethoxysilane, a secondary amine monomer is generated;

[0010] Through nucleophilic substitution reaction of 1 mole equivalent of -NH2 functional group of 2,2,6,6-tetramethylpiperidinamine and 0.91-0.99 mole equivalent of chlorine functional group of 3-chloropropyltrimethoxysilane, a secondary amine monomer is generated;

[0011] Under the action of an activating agent, through catalysis of an organic base catalyst, amide reaction occurs between 1 mole equivalent of -NH- functional group of the secondary amine monomer and 0.91-0.99 mole equivalent of carboxyl functional group of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, and an anti-aging silane coupling agent is generated.

[0012] Preferably, the preparation method of the aldehyde-modified anti-aging silane coupling agent is as follows: through nucleophilic substitution reaction of 1 mole equivalent of -NH- functional group of the secondary amine monomer and 0.91-0.99 mole equivalent of chlorine functional group of 5-chloropentanal, an aldehyde-modified anti-aging silane coupling agent is generated.

[0013] Preferably, the activating agent is one of N,N'-dicyclohexyl carbodiimide, 1-hydroxybenzotriazole, and N-hydroxy-7-azabenzotriazole.

[0014] Preferably, the organic base catalyst is one of pyridine, triethylamine, tributylamine, and imidazole.

[0015] Preferably, the formula of the anti-aging modification reagent is as follows: 4-8 parts by weight of amino-functionalized kaolin, 1-3 parts by weight of rutile TiO2 nanoparticles, 0.5-1.5 parts by weight of the anti-aging silane coupling agent, and 0.5-1.5 parts by weight of the aldehyde-modified anti-aging silane coupling agent.

[0016] Preferably, the preparation method of the amino-functionalized kaolin is as follows: 3-aminopropyltrimethoxysilane and trimethoxy(2-phenylethyl)silane are used for composite modification treatment of kaolin, and through dehydration condensation reaction of the silicon hydroxyl functional groups obtained through hydrolysis reaction of the hydrolysis functional groups of 3-aminopropyltrimethoxysilane and trimethoxy(2-phenylethyl)silane and the hydroxyl functional groups on the surface of the hydrophilic kaolin, the amino-functionalized kaolin is prepared.

[0017] Preferably, the amount of the anti-aging modification reagent in the anti-aging SBR rubber particles is 10-20 wt% of the amount of the SBR rubber.

[0018] The mass ratio of the polyurethane adhesive to the anti-aging SBR rubber particles in the anti-aging plastic composite material prepared according to the above method is 1:(4-6).

[0019] Beneficial effects:

[0020] The present application uses organic light stabilizer hindered amine derivative (2, 2, 6, 6-tetramethylpiperidine amine), organic antioxidant hindered phenol derivative (3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid), silane coupling agent 3-chloropropyl trimethoxysilane and 5-chlorovaleraldehyde providing a linking group (aldehyde group) as raw materials, based on the mechanism of nucleophilic substitution reaction and amidation reaction, the synthesis of anti-aging silane coupling agent and aldehyde group of anti-aging silane coupling agent;

[0021] The anti-aging silane coupling agent and the aldehyde group of the anti-aging silane coupling agent are used for composite modification treatment of the inorganic light stabilizer rutile TiO2 nanoparticles, and an aldehyde group functionalized organic-inorganic hybrid anti-aging modifier is prepared;

[0022] Based on the aldehyde group-amino Schiff base reaction mechanism, the aldehyde group functionalized organic-inorganic hybrid anti-aging modifier is modified on the surface of the amino functionalized kaolin carrier (prepared by composite modification treatment of kaolin with 3-aminopropyl trimethoxysilane and trimethoxy(2-phenylethyl)silane) which has a large specific surface area and a porous structure, to prepare a supported anti-aging modifier with multiple active sites, and based on the π-π stacking effect between phenyl groups, the supported anti-aging modifier is used for composite modification treatment of SBR rubber to prepare an anti-aging SBR rubber;

[0023] The experimental results show that the SBR rubber prepared by the self-developed supported anti-aging modifier has not only significantly improved mechanical properties before aging, but also significantly improved tensile strength after thermal and photo-oxidation aging, showing excellent anti-aging performance compared with conventional SBR rubber;

[0024] The anti-aging SBR rubber particles formed by crushing the anti-aging SBR rubber are compounded with a polyurethane adhesive to prepare an anti-aging plastic composite material. DETAILED DESCRIPTION

[0025] Experimental Example One:

[0026] The synthesis of the anti-aging silane coupling agent includes but is not limited to the following reaction formula and reaction steps:

[0027]

[0028] The synthesis process of the anti-aging silane coupling agent is as follows:

[0029] Process one: using 2,2,6,6-tetramethylpiperidine amine as raw material, through nucleophilic substitution reaction of 1 mole equivalent of -NH2 functional group of 2,2,6,6-tetramethylpiperidine amine and 0.94 mole equivalent of chlorine functional group of 3-chloropropyl trimethoxysilane, a secondary amine monomer is generated, and the specific synthesis steps are as follows: 3.2 g of 2,2,6,6-tetramethylpiperidine amine and 30 mL of N,N-dimethylformamide are added to a three-necked flask, stirred at room temperature until completely dissolved, then 3.6 mL of 3-chloropropyl trimethoxysilane and 0.8 mL of triethylamine are slowly added dropwise into the three-necked flask, heated to 70℃ and stirred for 5h, cooled to room temperature, rotary evaporated under reduced pressure, and dried to obtain the secondary amine monomer;

[0030] Process two: under the action of an activating agent, through amide reaction of 1 mole equivalent of -NH- functional group of the secondary amine monomer and 0.97 mole equivalent of carboxyl functional group of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid catalyzed by an organic base catalyst, an aging-resistant silane coupling agent is generated, and the specific synthesis steps are as follows: 3.2 g of the secondary amine monomer, 2.8 g of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid, 1.0 g of triethylamine and 50 mL of N,N-dimethylformamide are added to a three-necked flask, stirred at room temperature until completely dissolved, then 10 mL of N,N-dimethylformamide solution containing 1.5 g of N,N'-dicyclohexyl carbodiimide is added into the three-necked flask, heated to 80℃ and stirred for 6h, cooled to room temperature, rotary evaporated under reduced pressure, washed with dichloromethane, and dried to obtain the aging-resistant silane coupling agent;

[0031] Among them, the activating agent can be selected from one of N,N'-dicyclohexyl carbodiimide, 1-hydroxybenzotriazole and N-hydroxy-7-azabenzotriazole, and N,N'-dicyclohexyl carbodiimide is selected in this experimental example; the organic base catalyst can be selected from one of pyridine, triethylamine, tributylamine and imidazole, and triethylamine is selected in this experimental example;

[0032] The aging-resistant silane coupling agent is characterized by the following hydrogen nuclear magnetic resonance spectrum: 1 H NMR (400 MHz, DMSO-d6) δ: 0.49-0.55 (t, 2H), 1.24 (s, 6H), 1.28 (s, 6H), 1.37 (s, 18H), 1.54-1.72 (m, 6H), 2.00 (s, 1H), 2.69-2.75 (t, 2H), 2.88-2.93 (t, 2H), 3.29-3.34 (t, 2H), 3.58 (s, 9H), 4.74-4.82 (m, 1H), 6.51 (s, 1H), 6.91 (s, 2H).

[0033] Experimental example two:

[0034] Synthesis of aldehyde-modified aging-resistant silane coupling agent, including but not limited to the following reaction formula and reaction steps:

[0035]

[0036] The synthesis process of the aldehyde-modified aging-resistant silane coupling agent is as follows:

[0037] Process one: synthesis of secondary amine-based monomer, the synthesis method and steps of which are the same as those of the synthesis experiment of the secondary amine-based monomer in Experimental Example One;

[0038] Process two: through nucleophilic substitution reaction of 1 mole equivalent of -NH- functional groups of the secondary amine-based monomer and 0.95 mole equivalent of chlorine functional groups of 5-chloropentanal, an aldehyde-modified aging-resistant silane coupling agent is generated, and the specific synthesis steps are as follows: 3.2 g of the secondary amine-based monomer and 30 mL of N,N-dimethylformamide are added to a three-necked flask, and stirred at room temperature until completely dissolved. Then, 10 mL of N,N-dimethylformamide solution dissolving 1.2 g of 5-chloropentanal and 1.0 mL of triethylamine are slowly added dropwise to the three-necked flask in sequence, and the reaction is stirred at 70°C for 5 h. After cooling to room temperature, rotary evaporation under reduced pressure is performed, and after drying, the aldehyde-modified aging-resistant silane coupling agent is obtained;

[0039] The nuclear magnetic resonance hydrogen spectrum of the aldehyde-modified aging-resistant silane coupling agent is characterized as: 1 H NMR (400 MHz, DMSO-d6) δ: 0.50-0.56 (t, 2H), 1.22 (s, 6H), 1.28 (s, 6H), 1.41-1.59 (m, 10H), 2.01 (s, 1H), 2.40-2.46 (m, 2H), 2.59-2.67 (m, 1H), 2.75-2.79 (t, 4H), 3.60 (s, 9H), 9.17-9.20 (t, 1H).

[0040] Example One:

[0041] Preparation of a supported aging-resistant modifier, and the preparation process is as follows:

[0042] (1) Preparation of aldehyde group functionalized organic-inorganic hybrid anti-aging modifier: the hydroxyl functional groups obtained by hydrolysis reaction of the hydrolysis functional groups of the anti-aging silane coupling agent and the aldehyde group functionalized anti-aging silane coupling agent are subjected to dehydration condensation reaction with the hydroxyl functional groups on the surface of the hydrophilic rutile TiO2 nanoparticles, to prepare the aldehyde group functionalized organic-inorganic hybrid anti-aging modifier, and the specific preparation steps are as follows: 5 g of hydrophilic rutile TiO2 nanoparticles with an average particle size of 20 nm, 5 mL of deionized water and 45 mL of ethanol are added to a three-necked flask, ultrasonic dispersion is performed for 1 h, then 30 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 5:1) containing 2 g of the anti-aging silane coupling agent and 2 g of the aldehyde group functionalized anti-aging silane coupling agent is added dropwise to the three-necked flask, 2 drops of glacial acetic acid are added after the dropwise addition is completed, the temperature is increased to 60°C, stirring is performed for 4 h, the temperature is cooled to room temperature, centrifugal separation is performed, repeated washing and centrifugal separation are performed with deionized water, and the aldehyde group functionalized organic-inorganic hybrid anti-aging modifier is obtained after drying;

[0043] (2) Preparation of amino functionalized kaolin: the hydroxyl functional groups obtained by hydrolysis reaction of the hydrolysis functional groups of the 3-aminopropyltrimethoxysilane and the trimethoxy(2-phenylethyl)silane are subjected to dehydration condensation reaction with the hydroxyl functional groups on the surface of the hydrophilic kaolin, to prepare the amino functionalized kaolin carrier, and the specific preparation steps are as follows: 5 g of hydrophilic kaolin powder with an average particle size of 3000 mesh, 5 mL of deionized water and 45 mL of ethanol are added to a three-necked flask, ultrasonic dispersion is performed for 1 h, then 20 mL of an ethanol aqueous solution (the volume ratio of ethanol to deionized water is 5:1) containing 1 g of the 3-aminopropyltrimethoxysilane and 1 g of the trimethoxy(2-phenylethyl)silane is added dropwise to the three-necked flask, 2 drops of glacial acetic acid are added after the dropwise addition is completed, the temperature is increased to 60°C, stirring is performed for 4 h, the temperature is cooled to room temperature, centrifugal separation is performed, repeated washing and centrifugal separation are performed with deionized water, and the amino functionalized kaolin carrier is obtained after drying;

[0044] (3) Preparation of the supported anti-aging modifier: the Schiff base reaction between the aldehyde functional groups on the surface of the aldehyde functionalized organic-inorganic hybrid anti-aging modifier and the amino functional groups on the surface of the amino functionalized kaolin carrier is carried out to modify the organic-inorganic hybrid anti-aging modifier on the surface of the kaolin, and the supported anti-aging modifier is prepared. The specific preparation steps are as follows: 5 g of the amino functionalized kaolin carrier and 50 mL of ethanol are added to a three-necked flask, stirred at room temperature for 30 min, and ultrasonically dispersed for 1 h. Then, 30 mL of an ethanol solution containing 3 g of the aldehyde functionalized organic-inorganic hybrid anti-aging modifier is added to the three-necked flask, and the reaction is carried out at 70℃ for 10 h under stirring. After cooling to room temperature, centrifugal separation is carried out, and repeated washing and centrifugal separation are carried out with deionized water. After drying, the supported anti-aging modifier is obtained.

[0045] Example Two

[0046] Preparation of the anti-aging SBR rubber I: the π-π stacking between the phenyl groups contained in the supported anti-aging modifier and the phenyl groups on the side chains of the SBR rubber molecules is carried out to realize the composite modification of the SBR rubber by the supported anti-aging modifier, and the anti-aging SBR rubber I is obtained. The formula is as follows: 10 parts by weight of SBR latex (brand 1502), 1 part by weight of the supported anti-aging modifier, 0.1 part by weight of stearic acid, 0.3 part by weight of a vulcanization accelerator, and 0.2 part by weight of sulfur. The specific preparation steps are as follows: 10 g of SBR latex is added to 10 mL of a deionized water solution containing 1 g of the supported anti-aging modifier, and the mixture is stirred at room temperature for 2 h to form a supported anti-aging modifier / SBR mixed emulsion. The mixed emulsion is slowly added to a 1 wt% calcium chloride aqueous solution to form a supported anti-aging modifier / SBR flocculation gel. After being cut, washed, and dried, the supported anti-aging modifier / SBR pre-dispersed rubber is obtained. Then, the pre-dispersed rubber is plasticized on a two-roll open mill for 2 min, 0.1 g of stearic acid is added and mixed for 5 min, and the sheet is cooled and stored. Finally, 0.3 g of a vulcanization accelerator (type CZ) and 0.2 g of sulfur are added to the two-roll open mill, and the mixture is fully mixed by a small roller gap thin pass and a triangular folding process. The sheet is cooled and stored, and the anti-aging SBR rubber I is obtained by vulcanization at 150℃ and 10 MPa for 25 min.

[0047] Example Three

[0048] Preparation of the anti-aging SBR rubber II, which is different from the anti-aging SBR rubber I only in that the amount of the supported anti-aging modifier is 1.5 parts by weight.

[0049] Example Four

[0050] Preparation of the anti-aging SBR rubber III, which is different from the anti-aging SBR rubber I only in that the amount of the supported anti-aging modifier is 2 parts by weight.

[0051] Example Five

[0052] The anti-aging plastic composite material is prepared by the following steps:

[0053] Step 1: anti-aging SBR rubber is crushed into anti-aging SBR rubber particles with a diameter of 3 mm by using a double-shaft shearing crusher and a hammer crusher in sequence;

[0054] Step 2: polyurethane adhesive is mixed with anti-aging SBR rubber particles at a mass ratio of 1:5 at 50°C, poured into a mold with a thickness of 13 mm, and compacted with a pressing plate. After being placed at room temperature for 24 h, the anti-aging plastic composite material is obtained by demolding;

[0055] In the formula, the anti-aging SBR rubber is one of anti-aging SBR rubber I, anti-aging SBR rubber II, and anti-aging SBR rubber III.

[0056] Comparative Example

[0057] A conventional SBR rubber is prepared by using the same method as that for preparing anti-aging SBR rubber I, and the formula is: 10 parts by weight of SBR latex (brand 1502), 0.1 part by weight of stearic acid, 0.3 part by weight of a vulcanization accelerator, and 0.2 part by weight of sulfur.

[0058] Performance Test

[0059] The performance of the anti-aging SBR rubber is tested as follows:

[0060] (1) Mechanical property test: the tensile strength of the sample is tested by a universal tensile testing machine according to the standard of GB / T 528-2009 “Determination of Tensile Stress-Strain Properties of Vulcanized or Thermoplastic Rubber”. The sample is cut into dumbbell-shaped strips by a pneumatic slicing machine, and the sample tensile area size is 26 mm x 6 mm, and the tensile rate is 500 mm / min.

[0061] (2) Mechanical property test after thermal-oxidative aging for 10 days: first, the dumbbell-shaped sample with a size of 26 mm x 6 mm is placed in a forced ventilation type thermal aging test box for accelerated aging at 100°C for 10 days with an air exchange rate of 50 times / h, and then the tensile strength of the sample is tested by a universal tensile testing machine according to the standard of GB / T 528-2009 “Determination of Tensile Stress-Strain Properties of Vulcanized or Thermoplastic Rubber”. The tensile rate is 500 mm / min.

[0062] (3) Mechanical property test after photo-oxidation aging for 10 days: first, the dumbbell-shaped sample with a size of 26 mm x 6 mm is placed in an accelerated photo-aging test box, and treated under ultraviolet lamps for 10 days, the ultraviolet lamps have two, both are 36 W, the distance between the two lamp tubes is 15 cm, and the distance between the sample and the lamp tube is 14 cm, then the tensile strength of the sample is tested by using a universal tensile testing machine according to the standard of GB / T 528-2009 "Determination of Tensile Stress-Strain Properties of Vulcanized or Thermoplastic Rubber", and the tensile rate is 500 mm / min;

[0063] The performance test results of the above are shown in Table 1;

[0064] Table 1 Performance test results of the aging-resistant SBR rubber

[0065]

[0066] Note: Tensile strength retention rate (%) = (tensile strength after aging / tensile strength before aging) x 100%;

[0067] It can be known from the analysis of the performance test results in Table 1 that the SBR rubber prepared by using the self-developed load type aging-resistant modifier has not only significantly improved the mechanical properties before aging, but also significantly improved the tensile strength after thermal-oxidative aging and photo-oxidative aging, and exhibits excellent aging resistance compared with the conventional SBR rubber.

Claims

1. A method for preparing an anti-aging plastic composite material, characterized by, It comprises the following steps: Step one: synthesis of anti-aging silane coupling agent and aldehyde-based anti-aging silane coupling agent; The chemical structural formula of the anti-aging silane coupling agent is: ； The chemical structural formula of the aldehyde-based anti-aging silane coupling agent is: ； Step two: based on the silanol-hydroxyl condensation reaction mechanism, the anti-aging silane coupling agent and the aldehyde-based anti-aging silane coupling agent are modified to the surface of the rutile TiO2 nanoparticles, and then based on the aldehyde group-amino Schiff base reaction mechanism, the TiO2 nanoparticles loaded with aldehyde functional groups are compounded with amino functionalized kaolin to prepare an anti-aging modification reagent; Step three: based on the π-π stacking effect, the anti-aging modification reagent is compounded with SBR rubber to prepare anti-aging SBR rubber particles through a crushing process, and the anti-aging SBR rubber particles are compounded with a polyurethane adhesive to prepare an anti-aging plastic composite material.

2. The method for preparing an aging-resistant plastic composite material according to claim 1, characterized in that: The preparation method of the anti-aging silane coupling agent is: With 2,2,6,6-tetramethylpiperidine amine as raw material, nucleophilic substitution reaction occurs between the -NH2 functional group of 1 mole equivalent of 2,2,6,6-tetramethylpiperidine amine and the chlorine functional group of 0.91-0.99 mole equivalent of 3-chloropropyl trimethoxysilane to generate a secondary amine monomer; Under the action of an activating agent, amide reaction occurs between the -NH- functional group of 1 mole equivalent of the secondary amine monomer and the carboxyl functional group of 0.91-0.99 mole equivalent of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid catalyzed by an organic base catalyst to generate the anti-aging silane coupling agent.

3. The method for preparing an aging-resistant plastic composite material according to claim 2, characterized in that: The preparation method of the aldehyde-based anti-aging silane coupling agent is: nucleophilic substitution reaction occurs between the -NH- functional group of 1 mole equivalent of the secondary amine monomer and the chlorine functional group of 0.91-0.99 mole equivalent of 5-chloropentanal to generate the aldehyde-based anti-aging silane coupling agent.

4. The method for preparing an aging-resistant plastic composite material according to claim 2, characterized in that: The activating agent is one of N,N'-dicyclohexyl carbodiimide, 1-hydroxybenzotriazole, and N-hydroxy-7-azabenzotriazole.

5. The method for preparing an aging-resistant plastic composite material according to claim 2, characterized in that: The organic base catalyst is one of pyridine, triethylamine, tributylamine, and imidazole.

6. The method for preparing an aging-resistant plastic composite material according to claim 1, characterized in that: The formula of the anti-aging modification reagent is: 4-8 parts by weight of amino functionalized kaolin, 1-3 parts by weight of rutile TiO2 nanoparticles, 0.5-1.5 parts by weight of the anti-aging silane coupling agent, and 0.5-1.5 parts by weight of the aldehyde-based anti-aging silane coupling agent.

7. The method for preparing an aging-resistant plastic composite material according to claim 6, characterized in that: The preparation method of the amino functionalized kaolin is: 3-aminopropyl trimethoxysilane and trimethoxy(2-phenylethyl)silane are used for composite modification treatment of kaolin, and the silanol functional groups obtained by hydrolysis reaction of the hydrolysis functional groups of 3-aminopropyl trimethoxysilane and trimethoxy(2-phenylethyl)silane are subjected to dehydration condensation reaction with the hydroxyl functional groups on the surface of the hydrophilic kaolin to prepare the amino functionalized kaolin.

8. The method for preparing an aging-resistant plastic composite material according to claim 1, characterized in that: The amount of the anti-aging modification reagent in the anti-aging SBR rubber particles is 10-20 wt% of the amount of SBR rubber.

9. The weatherable plastic composite prepared according to the method of any one of claims 1-8, wherein, The mass ratio of the polyurethane adhesive to the anti-aging SBR rubber particles in the anti-aging plastic composite material is 1:(4-6).

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