Water-resistant pc / pet filling material and preparation method thereof

Abstract

The application discloses a water-resistant PC / PET filling material and a preparation method thereof. The material comprises the following raw materials in parts by weight: PC, PET, modified montmorillonite and a processing aid, wherein the modified montmorillonite is phenyl phosphinic acid modified glycidyl ether modified montmorillonite. The material solves the problems of degradation and mechanical property reduction caused by the introduction of the filler into the system, and can simultaneously solve the problem of poor water resistance.

Description

Technical Field

[0001] This invention belongs to the field of modified plastics, specifically relating to a water-resistant PC / PET filler material and its preparation method. Background Technology

[0002] PC / PET alloys, prepared by blending polycarbonate (PC) and polyethylene terephthalate (PET), have been widely used in many fields such as automobiles and electronics due to their excellent performance.

[0003] In today's rapidly developing new energy and intelligent driving era, many automakers using LiDAR solutions require alloys with low dimensional variation and weather resistance. Typically, achieving low dimensional variation in PC / PET alloys requires the addition of fillers. However, due to the characteristics of polyester materials, they exhibit low melt strength and melt viscoelasticity during processing, leading to system degradation. Furthermore, their unique molecular structure makes the material highly susceptible to hydrolysis, resulting in performance failure under harsh outdoor conditions. These characteristics significantly limit the application of this material in various fields.

[0004] In polyester processing, introducing chain extenders is one way to improve the processability and mechanical properties of the material. While commonly used chain extenders can improve this, they cannot simultaneously address the issue of poor water resistance.

[0005] In summary, there is an urgent need for a modifier for PC / PET filler materials to solve the problems of degradation and decreased mechanical properties caused by the introduction of fillers into the system, while also addressing the issue of poor water resistance. Summary of the Invention

[0006] To address the above problems, this invention provides a water-resistant PC / PET filler material and its preparation method. The filler material of this invention has excellent performance and good stability.

[0007] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0008] A polycarbonate (PC) / polyethylene terephthalate (PET) material, said material comprising the following parts by weight of raw materials:

[0009] 25-75 parts by weight of PC;

[0010] 15-65 parts by weight of PET;

[0011] 5-30 parts by weight of modified montmorillonite;

[0012] 0-5 parts by weight of processing aid.

[0013] Preferably, the material comprises the following parts by weight of raw materials:

[0014] 45-75 parts by weight of PC;

[0015] 15-45 parts by weight of PET;

[0016] 5-20 parts by weight of modified montmorillonite;

[0017] 0-5 parts by weight of processing aid.

[0018] In one embodiment of the present invention, the melt flow index of the PC at 300°C and 1.2 kg is 3-65 g / 10 min, preferably 7-50 g / 10 min, and more preferably 15-35 g / 10 min.

[0019] In one embodiment of the present invention, the intrinsic viscosity of the PET is 0.58-0.87 dl / g, and the intrinsic viscosity is determined using the capillary method.

[0020] In one embodiment of the present invention, the modified montmorillonite is phenylphosphine-modified glycidyl ether-modified montmorillonite.

[0021] In one embodiment of the present invention, the modified montmorillonite is prepared by a method comprising the following steps:

[0022] S1: Phenylenephosphonic acid is neutralized with an amine compound to obtain phenylphosphonate salt;

[0023] S2: Eugenol reacts with epichlorohydrin to give eugenol glycidyl ether;

[0024] S3: Eugenol glycidyl ether is reacted with phenylphosphine salt to obtain phenylphosphine-modified glycidyl ether;

[0025] S4: Modified montmorillonite is prepared by mixing phenylphosphine-modified glycidyl ether with montmorillonite.

[0026] In one embodiment of the invention, the amine compound in S1 comprises a C3-C18 alkyl tertiary amine, preferably one or more of trimethylamine, triethylamine, tripropylamine, and tributylamine.

[0027] In one embodiment of the present invention, the mass ratio of phenylphosphine to amine compound in S1 is 40-50:30-60.

[0028] In one embodiment of the present invention, the temperature in S1 is 50-70°C, and the time is 4-6 hours.

[0029] In one embodiment of the present invention, the mass ratio of eugenol to epichlorohydrin in S2 is 20-40:60-80.

[0030] In one embodiment of the present invention, the temperature in S2 is 40-90°C, and the time is 6-12 hours.

[0031] In one embodiment of the invention, the reaction in S3 is carried out in solution; preferably, the solvent is an ester organic solvent, preferably ethyl acetate.

[0032] In one embodiment of the present invention, the temperature in S3 is 20-50°C, and the time is 1-4 hours.

[0033] In one embodiment of the present invention, the montmorillonite in S4 is 1.5-2 times the mass of the phenylphosphine-modified glycidyl ether.

[0034] In one embodiment of the invention, S4 is mixed in water; preferably, the water content in the mixture is ≤50wt%, more preferably 10-50wt%.

[0035] In one embodiment of the present invention, the temperature in S4 is 40℃-100℃, and the time is 5-8 hours.

[0036] The preparation reaction involved in this invention is illustrated below:

[0037]

[0038] In this invention, processing aids such as: self-antioxidants, lubricants, ultraviolet absorbers, flame retardants, toughening agents, compatibilizers, light stabilizers, heat stabilizers, metal passivators, plasticizers, anti-sticking agents, colorants, coupling agents, nucleating agents, foaming agents, antibacterial agents, mildew inhibitors, acid removers, hydrolysis resistant agents, chain extenders, flow modifiers, transesterification inhibitors, matting agents, antistatic agents, reinforcing agents, fillers, antifogging agents, light diffusing agents, infrared absorbers, fluorescent whitening agents, and laser marking agents can be used in combination with one or more of these. Preferably, the antioxidant is a hindered phenol or a phosphite. The lubricant is one or a combination of two or more of the following antioxidants: thioesters, benzofurans, acryloyl-modified phenols, and hydroxylamines. Preferably, the lubricant is one or a combination of two or more of the following: fatty alcohols, metallic soaps, fatty acids, fatty acid esters, lignite acid and its derivatives, amide waxes, saturated hydrocarbons, polyolefin waxes and their derivatives, organosilicon and silicone powders, and organofluorine compounds. Preferably, the ultraviolet absorber is one or a combination of two or more of the following: benzophenones, benzotriazoles, triazines, benzoate esters, cyanoacrylates, and phenylimidazolium. All of the above-mentioned additives are commonly used in the art, and their selection and dosage are well known to those skilled in the art.

[0039] Another object of the present invention is to provide a method for preparing polycarbonate (PC) / polyethylene terephthalate (PET) materials.

[0040] A method for preparing the above-mentioned polycarbonate (PC) / polyethylene terephthalate (PET) material, the method comprising the following steps:

[0041] SS1: PET, modified montmorillonite, and optional processing aids are melt-extruded and granulated to obtain PET masterbatch;

[0042] SS2: After mixing PC and PET masterbatch, the mixture is extruded and granulated using a twin-screw extruder to obtain the target material;

[0043] In one embodiment of the present invention, the temperature in SS1 is 200-300°C and the screw speed is 200-800 rpm.

[0044] In one embodiment of the present invention, the temperature in SS2 is 200-300°C and the screw speed is 200-800 rpm.

[0045] Another object of the present invention is to provide a use of a polycarbonate (PC) / polyethylene terephthalate (PET) material.

[0046] The use of a polycarbonate (PC) / polyethylene terephthalate (PET) material, wherein the material is the one described above or the one prepared by the above preparation method, wherein the material is used as a water-resistant polycarbonate (PC) / polyethylene terephthalate (PET) material, preferably for use in the field of new energy vehicles.

[0047] Another object of the present invention is to provide a phenylphosphine-modified glycidyl ether-modified montmorillonite.

[0048] A phenylphosphino acid-modified glycidyl ether-modified montmorillonite, wherein the montmorillonite is the same as the montmorillonite used in the above-mentioned materials or the montmorillonite used in the above-mentioned preparation method.

[0049] Another object of the present invention is to provide a method for preparing phenylphosphine-modified glycidyl ether-modified montmorillonite.

[0050] A method for preparing phenylphosphine-modified glycidyl ether-modified montmorillonite, wherein the montmorillonite is the montmorillonite used in the above-mentioned materials, or the montmorillonite used in the above-mentioned preparation method, and the modified montmorillonite is prepared by a method comprising the following steps:

[0051] S1: Phenylenephosphonic acid is neutralized with an amine compound to obtain phenylphosphonate salt;

[0052] S2: Eugenol reacts with epichlorohydrin to give eugenol glycidyl ether;

[0053] S3: Eugenol glycidyl ether is reacted with phenylphosphine salt to obtain phenylphosphine-modified glycidyl ether;

[0054] S4: Modified montmorillonite is prepared by mixing phenylphosphine-modified glycidyl ether with montmorillonite.

[0055] The positive effects of this invention are as follows:

[0056] The PC / PET material of this invention exhibits stable moldability, as well as good performance and dimensional stability. The final material retains an impact strength of 43 KJ / m² after 14 days of double 85% damp heat aging test. 2 And the flame retardancy remains at V0. Attached Figure Description

[0057] Figure 1 The infrared spectrum of phenylphosphine-modified glycidyl ether (PPO-EP-EU-1) is shown. Detailed Implementation

[0058] To better explain the present invention, the present invention will be further described in detail below with reference to the embodiments. However, the embodiments described in the present invention are only for illustration and do not limit the scope of the present invention.

[0059] The components of the comparative examples and embodiments are as follows:

[0060] Polycarbonate resin: 2150, melt flow index of 15g / 10min (300℃, 1.2kg), Wanhua Chemical Group Co., Ltd.

[0061] Polycarbonate resin: 2220, melt flow index of 20g / 10min (300℃, 1.2kg), Wanhua Chemical Group Co., Ltd.

[0062] Polyethylene terephthalate resin: CZ-328A, Sanfangxiang Company, with an intrinsic viscosity of 0.87 dl / g;

[0063] Polyethylene terephthalate resin: CZ-5033, Sanfangxiang Company, with an intrinsic viscosity of 0.65 dl / g;

[0064] Phenylephrine (PPO): Adamas Reagents Ltd.

[0065] Triethylamine (TEA), Jinan Quansheng Chemical Co., Ltd.

[0066] Eugenol (EU): Sinopharm Chemical Reagent Co., Ltd.

[0067] Epichlorohydrin (EP): Sinopharm Chemical Reagent Co., Ltd.

[0068] Sodium hydroxide: Sinopharm Chemical Reagent Co., Ltd.

[0069] Tetrabutylammonium bromide (TBAB): Adamas Reagents Ltd.

[0070] Ethyl acetate: Sinopharm Chemical Reagent Co., Ltd.

[0071] Deionized water: Wanhua Chemical Group Co., Ltd.

[0072] Montmorillonite (MMT): Sodium-based montmorillonite, manufactured by Nanocor Corporation, USA.

[0073] Antioxidant: Irganox 168, manufactured by BASF.

[0074] Diphenyl sulfonate: KSS, a conventional flame retardant, produced by Sinopharm Chemical Reagent Co., Ltd.

[0075] Lubricant: PETS, pentaerythritol stearate, Lonza Corporation, USA.

[0076] Transesterification inhibitor: PGP, Quansheng Company.

[0077] Phenylenephosphino acid modified glycidyl ether (PPO-EP-EU-1):

[0078] (1) Place 28 parts by mass (0.2 mol) of phenylphosphine and 20 parts by mass (0.2 mol) of triethylamine into a beaker, stir continuously at 50°C to allow the substances to react fully, and continue the reaction for 6 hours. After filtration, phenylphosphine salt is obtained.

[0079] (2) Add 33 parts by mass (0.2 mol) of eugenol, 93 parts by mass (1 mol) of epichlorohydrin and 1 part by mass of TBAB to a three-necked flask equipped with a condenser and a thermometer. React at 85°C for 9 h. Cool down to 40°C, add 16 parts by mass of 40 wt% NaOH solution and add 0.4 parts by mass of TBAB. Continue to react for 2 h. Filter to remove the precipitated NaCl, wash with water to remove water, rotary evaporate and recrystallize to obtain eugenol glycidyl ether (EP-EU).

[0080] (3) Add 49 parts by mass (0.2 mol) of phenylphosphine salt and 44 parts by mass (0.2 mol) of eugenol glycidyl ether to a three-necked flask equipped with a condenser and a thermometer, pour in 32 parts by mass of ethyl acetate, stir continuously at 23°C to fully dissolve the substances, continue the reaction for 4 hours, remove ethyl acetate by rotary evaporation, and dry in a vacuum oven at 100°C for 5 hours to obtain PPO-EP-EU.

[0081] The characteristics are shown in the appendix. Figure 1 .

[0082] Phenylenephosphinic acid modified glycidyl ether (PPO-EP-EU-2):

[0083] (1) 28 parts by mass (0.2 mol) of phenylphosphine and 30 parts by mass (0.3 mol) of triethylamine were placed in a beaker and stirred continuously at 60°C to allow the substances to react fully. The reaction was continued for 4 hours and then filtered to obtain phenylphosphine salt.

[0084] (2) 33 parts by mass (0.2 mol) of eugenol, 112 parts by mass (1.2 mol) of epichlorohydrin and 1 part by mass of TBAB were added to a three-necked flask equipped with a condenser and a thermometer. The reaction was carried out at 80°C for 8 h. The temperature was lowered to 50°C, 16 parts by mass of 40 wt% NaOH solution was added dropwise and 0.4 parts by mass of TBAB was added. The reaction was continued for 4 h. The precipitated NaCl was removed by filtration, and the product was washed with water to remove water. After rotary evaporation and recrystallization, eugenol glycidyl ether (EP-EU) was obtained.

[0085] (3) Add 49 parts by mass (0.2 mol) of phenylphosphine salt and 66 parts by mass (0.3 mol) of eugenol glycidyl ether to a three-necked flask equipped with a condenser and a thermometer, pour in 40 parts by mass of ethyl acetate, stir continuously at 40°C to fully dissolve the substances, continue the reaction for 2 hours, remove ethyl acetate by rotary evaporation, and dry in a vacuum oven at 100°C for 5 hours to obtain PPO-EP-EU-2.

[0086] Modified montmorillonite (PEE-MMT-1):

[0087] Weigh 30 parts by mass of PPO-EP-EU-1, then add 50 parts by mass of montmorillonite and 30 parts by mass of deionized water. Stir at 80°C for 6 hours at a stirring speed of 1500 rpm / min to obtain an aqueous solution of modified montmorillonite. (Unit: kg)

[0088] Modified montmorillonite (PEE-MMT-2):

[0089] Weigh 30 parts by mass of PPO-EP-EU-1, then add 60 parts by mass of montmorillonite and 40 parts by mass of deionized water. Stir at 50°C for 8 hours at a stirring speed of 1500 rpm / min to obtain an aqueous solution of modified montmorillonite. (Unit: kg)

[0090] Performance tests are as follows:

[0091] Impact strength was tested according to ISO 179 standard. The sample size was 80*10*4mm and the notch depth was 2.0mm.

[0092] Bending strength was tested according to ISO 178, with a sample size of 80*10*4mm and a rate of 2mm / min.

[0093] The Vicat softening temperature (VST) was tested according to ISO 306 standard, with a load of 50 N and a heating rate of 120 °C / h.

[0094] Flammability rating is tested according to UL-94, with sample dimensions of 130mm*13mm*1.5mm, and tested for vertical burning.

[0095] The linear coefficient of thermal expansion (CLTE) was measured according to ISO 11359, with a sample size of 8mm*10mm*3mm and a test temperature of -45℃ to 100℃.

[0096] Infrared spectroscopy was performed using a Fourier transform infrared spectrometer, model WQF-600N, in total internal reflection mode at wavelengths of 4000–400 cm⁻¹. -1 .

[0097] Examples 1-3

[0098] The material preparation process is as follows:

[0099] Example 1-2, Process A:

[0100] (1) Preparation of PET masterbatch: PET, modified montmorillonite and additives are mixed and stirred in a high-speed mixer according to the mass ratio in Table 1. The mixture is added to the loss-in-weight feeder above the feed port of the screw extruder. The temperature of the twin-screw extruder zones 1-10 is controlled at 200℃, 220℃, 240℃, 250℃, 250℃, 250℃, 250℃, 240℃, and 235℃ respectively. The die head temperature is 230℃. The screw speed is controlled at 700 rpm. The mixture is processed through blending, drawing, water cooling, air drying and pelletizing to obtain PET masterbatch.

[0101] (2) Blending, extrusion and granulation: PC and PET masterbatches are mixed in a high-speed mixer according to the types and amounts of raw materials in Table 1. The mixture is then added to the loss-in-weight feeder above the feed port of the screw extruder. The temperatures of zones 1-10 of the twin-screw extruder are controlled at 200℃, 220℃, 240℃, 250℃, 250℃, 250℃, 250℃, 240℃, and 235℃, respectively. The die head temperature is 230℃, and the screw speed is controlled at 700 rpm. The mixture undergoes blending, drawing, water cooling, air drying, pelletizing and drying processes to obtain the PC / PET composition.

[0102] Example 3, Process B:

[0103] (1) Preparation of PET masterbatch: PET, modified montmorillonite and additives are mixed and stirred in a high-speed mixer according to the mass ratio in Table 1. The mixture is added to the loss-in-weight feeder above the feed port of the screw extruder. The temperature of the twin-screw extruder zones 1-10 is controlled at 230℃, 250℃, 270℃, 280℃, 280℃, 280℃, 280℃, 270℃, and 265℃ respectively, and the die head temperature is 260℃. The screw speed is controlled at 200 rpm. The mixture is processed through blending, drawing, water cooling, air drying and pelletizing to obtain PET masterbatch.

[0104] (2) Blending, extrusion and granulation: PC and PET masterbatches are mixed in a high-speed mixer according to the types and amounts of raw materials in Table 1. The mixture is then added to the loss-in-weight feeder above the feed port of the screw extruder. The temperatures of zones 1-10 of the twin-screw extruder are controlled at 230℃, 250℃, 270℃, 280℃, 280℃, 280℃, 280℃, 270℃, and 275℃, respectively. The die head temperature is 260℃, and the screw speed is controlled at 200 rpm. The mixture undergoes blending, drawing, water cooling, air drying, pelletizing and drying processes to obtain the PC / PET composition.

[0105] Comparative Examples 1-6

[0106] The material preparation process is as follows:

[0107] (1) Blending, extrusion and granulation: Polycarbonate resin, PET, PPO, EP-EU, PPO-EP-EU, MMT, PPE-MMT and PGP are mixed in a high-speed mixer according to the types and amounts of raw materials in Table 1. The mixture is added to the loss-in-weight feeder above the feed port of the screw extruder. The temperatures of zones 1-10 of the twin-screw extruder are controlled at 200℃, 220℃, 240℃, 250℃, 250℃, 250℃, 250℃, 240℃ and 235℃ respectively, and the die head temperature is 230℃. The screw speed is controlled at 400 rpm. The mixture goes through blending, drawing, water cooling, air drying, pelletizing and drying processes to obtain the PC / PET composition.

[0108] Comparative Examples 1-4 were compared with Example 2. Comparative Example 1 differed from Example 2 in that it contained only phenylphosphine-modified glycidyl ether, while the rest were the same. Comparative Example 2 differed from Example 3 in that it contained both phenylphosphine-modified glycidyl ether and montmorillonite, but only through physical blending without intercalation modification, while the rest were the same. Comparative Example 4 differed from Example 4 in that it did not contain phenylphosphine-modified glycidyl ether, but instead used the common flame retardant KSS and montmorillonite, but only through physical blending, while the rest were the same.

[0109] Table 1. Formulations of Examples 1-3 and Comparative Examples 1-4 (unit: kg)

[0110] Dosage / parts by weight Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 2150 44 29 10.3 29 29 29 29 2220 30 20 34.7 20 20 20 20 CZ-328A 10 20 20 20 20 20 20 CZ-5033 8 10 24 10 10 10 10 168 0.3 0.3 0.3 0.3 0.3 0.3 0.3 PETS 0.4 0.4 0.4 0.4 0.4 0.4 0.4 PGP 0.3 0.3 0.3 0.3 0.3 0.3 0.3 KSS / / / / / / 10 PPO-EP-EU / / / 20 / 10 / MMT / / / / 20 10 10 PEE-MMT-1 7 20 / / / / / PEE-MMT-2 / / 10 / / / /

[0111] Table 2 Performance comparison of Examples 1-3 and Comparative Examples 1-4

[0112] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Flexural modulus / MPa 2800 3500 2900 2400 3300 3200 2900 VST / ℃ 104 111 106 100 109 108 106 CLTE (23~55℃) <![CDATA[60*10 -6 ]]> <![CDATA[45*10 -6 ]]> <![CDATA[55*10 -6 ]]> <![CDATA[80*10 -6 ]]> <![CDATA[50*10 -6 ]]> <![CDATA[55*10 -6 ]]> <![CDATA[60*10 -6 ]]>

[0113] Table 3. Comparison of water resistance performance between Examples 1-3 and Comparative Examples 1-4

[0114] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Combustion rating - 0 days V2 V0 V1 V1 NG V1 V1 Burn rating - 7 days V2 V0 V1 NG NG V2 V2 Burn rating - 14 days NG V0 V1 NG NG NG NG Impact strength / KJ / m2 - 0 days 40 55 50 38 20 35 22 Impact strength / KJ / m2 - 7 days 24 45 30 20 15 19 14 Impact strength / KJ / m2 - 14 days 13 43 22 10 10 11 9

[0115] Note: For 0-day, 7-day, and 14-day wet heat aging of dual 85, the flammability rating is V0 > V1 > V2 > NG.

[0116] By comparing the physical properties of Examples 1-3 and Comparative Examples 1-4, it can be found that compared with PC / PET alloys prepared by simply physically mixing the raw materials, the alloy material with direct addition of PPE-MMT has more significant advantages in terms of VST and impact resistance. Furthermore, with the increase of the content, the toughness and rigidity of the material can be improved simultaneously. By comparing the CLTE of Examples 1-3 and Comparative Examples 1-4, it can be seen that the intercalated modified montmorillonite can further improve the dimensional stability of the material. By comparing the combustion rating and impact performance of Examples 1-3 and Comparative Examples 1-4 after adding 85, it can be seen that the alloy properties of adding each component alone and unmodified montmorillonite are lost very quickly, while the addition of intercalated modified montmorillonite significantly improves the material's resistance to damp heat. By comparing the data of Comparative Example 3 and Example 2, it can be further seen that the modified montmorillonite and PET pre-extrusion process enable the modified montmorillonite to exert a better effect in the system.

[0117] Those skilled in the art should understand that this invention is not limited to the above embodiments. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims.

Claims

1. A polycarbonate (PC) / polyethylene terephthalate (PET) material, characterized in that, The material comprises the following raw materials in parts by weight: 25-75 parts by weight of PC; 15-65 parts by weight of PET; 5-30 parts by weight of modified montmorillonite; 0-5 parts by weight of processing aids; The modified montmorillonite is phenylphosphine-modified glycidyl ether-modified montmorillonite, prepared by a method comprising the following steps: S1: Phenylenephosphonic acid is neutralized with an amine compound to obtain phenylphosphonate salt; S2: Eugenol reacts with epichlorohydrin to give eugenol glycidyl ether; S3: Eugenol glycidyl ether is reacted with phenylphosphine salt to obtain phenylphosphine-modified glycidyl ether; S4: Modified montmorillonite is prepared by mixing phenylphosphine-modified glycidyl ether with montmorillonite.

2. The material according to claim 1, characterized in that, The material comprises the following raw materials in parts by weight: 45-75 parts by weight of PC; 15-45 parts by weight of PET; 5-20 parts by weight of modified montmorillonite; 0-5 parts by weight of processing aid.

3. The material according to claim 1, characterized in that, The melt flow index of the PC at 300℃ and 1.2kg is 3-65g / 10min; And / or, the intrinsic viscosity of the PET is 0.58-0.87 dl / g.

4. The material according to claim 3, characterized in that, The melt flow index of the PC at 300℃ and 1.2kg is 7-50g / 10min.

5. The material according to claim 4, characterized in that, The melt flow index of the PC at 300℃ and 1.2kg is 15-35g / 10min.

6. The material according to claim 1, characterized in that, The amine compounds in S1 include C3-C18 alkyl tertiary amines; And / or, the mass ratio of phenylphosphine to amine compound in S1 is 40-50:30-60; And / or, the temperature in S1 is 50-70℃, and the time is 4-6 hours.

7. The material according to claim 6, characterized in that, The amine compound in S1 includes one or more of trimethylamine, triethylamine, tripropylamine, and tributylamine.

8. The material according to claim 1, characterized in that, The mass ratio of eugenol to epichlorohydrin in S2 is 20-40:60-80; And / or, the temperature in S2 is 40-90℃, and the time is 6-12 hours.

9. The material according to claim 1, characterized in that, The reaction in S3 takes place in solution; And / or, the temperature in S3 is 20-50℃, and the time is 1-4 hours.

10. The material according to claim 9, characterized in that, The solvent in S3 is an ester-based organic solvent.

11. The material according to claim 10, characterized in that, The solvent in S3 is ethyl acetate.

12. The material according to claim 1, characterized in that, In S4, the amount of montmorillonite is 1.5-2 times the mass of phenylphosphine-modified glycidyl ether; And / or, S4 is mixed in water; And / or, the temperature in S4 is 40℃-100℃, and the time is 5-8 hours.

13. The material according to claim 12, characterized in that, The water content in the mixture of S4 is ≤50wt%.

14. The material according to claim 13, characterized in that, The water content in the mixture in S4 is 10~50wt%.

15. A method for preparing the polycarbonate (PC) / polyethylene terephthalate (PET) material according to any one of claims 1-14, characterized in that, The preparation method includes the following steps: SS1: PET, modified montmorillonite, and optional processing aids are melt-extruded and granulated to obtain PET masterbatch; SS2: After mixing PC and PET masterbatch, the mixture is extruded and granulated using a twin-screw extruder to obtain the target material.

16. The preparation method according to claim 15, characterized in that, The temperature in SS1 is 200-300℃, and the screw speed is 200-800rpm; And / or, the temperature in SS2 is 200-300℃, and the screw speed is 200-800rpm.

17. Use of a polycarbonate (PC) / polyethylene terephthalate (PET) material, said material being the material of any one of claims 1-14, or the material prepared by the preparation method of claim 15 or 16, said material being used as a water-resistant polycarbonate (PC) / polyethylene terephthalate (PET) material.

18. The use according to claim 17, characterized in that, The material is used in the field of new energy vehicles.

19. A method for preparing phenylphosphine-modified glycidyl ether-modified montmorillonite, characterized in that, The modified montmorillonite is prepared by a method comprising the following steps: S1: Phenylenephosphonic acid is neutralized with an amine compound to obtain phenylphosphonate salt; S2: Eugenol reacts with epichlorohydrin to give eugenol glycidyl ether; S3: Eugenol glycidyl ether is reacted with phenylphosphine salt to obtain phenylphosphine-modified glycidyl ether; S4: Modified montmorillonite is prepared by mixing phenylphosphine-modified glycidyl ether with montmorillonite.

20. A phenylphosphine-modified glycidyl ether-modified montmorillonite, prepared by the preparation method described in claim 19.

Images