High impact transparent chemical resistant pc / pctg alloy and method of making

Abstract

The application discloses a kind of high impact transparent chemical resistance PC / PCTG alloy and preparation method thereof, belong to high polymer composite technical field.The preparation raw materials of the PC / PCTG alloy include 10-50 parts of PC, 20-90 parts of PCTG, 1-5 parts of toughening agent, 0.3-0.5 parts of antioxidant, 0.2-0.5 parts of lubricant and 0.2-0.4 parts of ester exchange inhibitor by weight fraction.The PC / PCTG alloy prepared from the above preparation raw materials can have high transparency, high impact, heat resistance, chemical resistance, and is widely applicable.The preparation includes: the preparation raw materials mixed according to the proportion are extruded, cooled, granulated, dried and injection molded.The method is simple and easy to control, and can be industrialized.

Description

Technical Field

[0001] This invention relates to the field of polymer composite materials technology, and more specifically, to a high-impact, transparent, and chemically resistant PC / PCTG alloy and its preparation method. Background Technology

[0002] Polycarbonate (PC) is a high-strength, high-transmittance thermoplastic resin material with comprehensive properties such as heat resistance and electrical resistance. It also possesses impact resistance, dimensional stability, and flame retardancy, making it widely used in glass assembly, automotive, electronics, mechanical parts, optical discs, packaging, office equipment (including computers), medical and healthcare products, films, leisure and protective equipment, and other fields. However, due to its difficulty in processing and poor chemical resistance, PC's applications are limited in environments requiring chemical resistance, transparency, a certain level of drop resistance, and specific heat resistance, such as in household appliances like robotic vacuum cleaners.

[0003] Currently, the most common way to improve the chemical resistance of PC is to add polymer materials with good oil resistance, such as PET, ABS, PETG, and PBT. However, materials such as PET, PBT, and ABS will affect the transparency of PC. In other words, existing PC alloy products cannot simultaneously possess high transparency, high impact resistance, heat resistance, and chemical resistance.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a high-impact, transparent, and chemically resistant PC / PCTG alloy and its preparation method, so as to solve or improve the above-mentioned technical problems.

[0006] This invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a high-impact, transparent, and chemically resistant PC / PCTG alloy, wherein the raw materials for preparing the high-impact, transparent, and chemically resistant PC / PCTG alloy include 10-50 parts of PC, 20-90 parts of PCTG, 1-5 parts of toughening agent, 0.3-0.5 parts of antioxidant, 0.2-0.5 parts of lubricant, and 0.2-0.4 parts of transesterification inhibitor.

[0008] In an optional implementation, the mass ratio of PC to PCTG is 3:6.5 to 3:7.5.

[0009] In an optional embodiment, the above-mentioned raw materials include 30 parts of PC, 65 to 68 parts of PCTG, 1 to 4.1 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

[0010] In an optional embodiment, the above-mentioned raw materials include 30 parts of PC, 67.1 parts of PCTG, 2 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

[0011] In an optional embodiment, PC is a transparent bisphenol A polycarbonate with a light transmittance of ≥89%.

[0012] In an optional embodiment, the toughening agent includes at least one of methyl methacrylate-butadiene-styrene copolymer, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-acrylic plastic, ethylene-butyl acrylate-glycidyl methacrylate copolymer, glycidyl methacrylate, styrene-butadiene thermoplastic elastomer, and methyl methacrylate-styrene-silicone-butyl acrylate.

[0013] In an optional embodiment, the toughening agent includes methyl methacrylate-butadiene-styrene copolymer and ethylene-methyl methacrylate-glycidyl methacrylate terpolymer.

[0014] In an optional embodiment, the mass ratio of methyl methacrylate-butadiene-styrene copolymer and ethylene-methyl methacrylate-glycidyl methacrylate terpolymer is from 1:1 to 2.5:1.

[0015] In optional embodiments, the antioxidant includes at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide), tris[2,4-di-tert-butylphenyl] phosphite, oxaloyl(diimino-2,1-ethylidene)propionate (3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

[0016] In an optional embodiment, the antioxidant includes at least two of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide), tris[2,4-di-tert-butylphenyl] phosphite, oxaloyl(diimino-2,1-ethylidene)propionate (3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

[0017] In an optional embodiment, the antioxidant includes pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

[0018] In an optional embodiment, the mass ratio of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] to bis(2,4-dicumylphenyl)pentaerythritol diphosphite is from 1:1 to 1:2.5.

[0019] In an optional embodiment, the lubricant includes at least one of polyethylene wax, OP wax, PETS, montana wax, and calcium stearate.

[0020] In an optional implementation, the lubricant includes PETS.

[0021] In optional embodiments, the transesterification inhibitor includes at least one of sodium dihydrogen phosphate, sodium pyrophosphate, sodium metaphosphate, tetraethyl orthosilicate, triethyl phosphite, triphenyl phosphite, diisooctyl phosphate, and alkyl phosphates.

[0022] In an optional implementation, the transesterification inhibitor includes triphenyl phosphite.

[0023] Secondly, the present invention provides a method for preparing a high-impact, transparent, and chemically resistant PC / PCTG alloy as described in any of the foregoing embodiments, comprising the following steps: extruding, cooling, granulating, drying, and injection molding the prepared raw materials after mixing in the specified proportions.

[0024] In an optional embodiment, extrusion is performed using a twin-screw extruder having 11 temperature zones, the temperatures of which are sequentially 118℃~122℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, and 238℃~242℃, and the rotational speed of the twin-screw extruder is 200rpm~300rpm.

[0025] The beneficial effects of this invention include:

[0026] This invention combines PC and PCTG in a specific ratio, and further combines them with a specific proportion of toughening agents, antioxidants, lubricants, and transesterification inhibitors. This allows the PC / PCTG alloy to have good impact strength and transparency while being heat-resistant (100℃) and chemical-resistant. In other words, a PC / PCTG alloy with high transparency, high impact, heat resistance, and chemical resistance can be obtained, thus expanding the application range of the corresponding products. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0028] The following is a detailed description of the high impact resistance, transparent chemical resistance PC / PCTG alloy and its preparation method provided by the present invention.

[0029] This invention provides a high-impact, transparent, and chemical-resistant PC / PCTG alloy. By weight, the raw materials for preparing this high-impact, transparent, and chemical-resistant PC / PCTG alloy include 10-50 parts of PC, 20-90 parts of PCTG, 1-5 parts of toughening agent, 0.3-0.5 parts of antioxidant, 0.2-0.5 parts of lubricant, and 0.2-0.4 parts of transesterification inhibitor.

[0030] The amount of PC can be 10, 15, 20, 25, 30, 35, 40, 45 or 50 parts, or other values ​​within the range of 10 to 50 parts.

[0031] The dosage of PCTG can be 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85 or 90 parts, or other values ​​within the range of 20 to 90 parts.

[0032] The amount of toughening agent can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts or 5 parts, or other values ​​within the range of 1 to 5 parts.

[0033] The amount of antioxidant can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts or 0.5 parts, or other values ​​within the range of 0.3 to 0.5 parts.

[0034] The amount of lubricant can be 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts or 0.5 parts, or other values ​​within the range of 0.2 to 0.5 parts.

[0035] The dosage of the transesterification inhibitor can be 0.2 parts, 0.3 parts, 0.35 parts or 0.4 parts, or other values ​​within the range of 0.2 to 0.4 parts.

[0036] In some typical implementations, the mass ratio of PC to PCTG can be from 3:6.5 to 3:6.8, such as 3:6.5, 3:6.7, or 3:6.8, or other values ​​within the range of 3:6.5 to 3:6.8. In some even more typical implementations, the mass ratio of PC to PCTG is 3:6.71.

[0037] In some preferred embodiments, the raw materials for preparing the PC / PCTG alloy provided by the present invention include 30 parts of PC, 65 to 68 parts of PCTG, 1 to 4.1 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant, and 0.3 parts of transesterification inhibitor.

[0038] In some more preferred embodiments, the raw materials for preparing the PC / PCTG alloy provided by the present invention include 30 parts of PC, 67.1 parts of PCTG, 2 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

[0039] In this invention, PC can be, for example, transparent bisphenol A polycarbonate with a light transmittance of ≥89%, thereby enabling the alloy product to have good light transmittance.

[0040] It should be noted that while polyethylene terephthalate-1,4-cyclohexanediol (PCTG) possesses high transparency, high impact strength, and excellent chemical resistance, its poor heat resistance limits its use in environments requiring heat resistance (e.g., 100°C). This invention blends PC and PCTG under the aforementioned conditions, enabling the PC / PCTG alloy to maintain high impact performance without compromising transparency. Furthermore, it improves the chemical resistance and processability of the product while meeting certain heat resistance requirements (e.g., 100°C).

[0041] In this invention, the toughening agent may, by way of example but not by way of limitation, include at least one of the following: methyl methacrylate-butadiene-styrene copolymer (MBS), ethylene-methyl methacrylate-glycidyl methacrylate terpolymer, ethylene-acrylic plastic (EAA), ethylene-butyl methacrylate-glycidyl methacrylate copolymer (PTW), glycidyl methacrylate (GMA), styrene-butadiene thermoplastic elastomer (SBS), and methyl methacrylate-styrene-silicone-butyl acrylate.

[0042] In some typical embodiments, the toughening agent includes methyl methacrylate-butadiene-styrene copolymer (MBS) and ethylene-methyl acrylate-glycidyl methacrylate terpolymer. The mass ratio of the methyl methacrylate-butadiene-styrene copolymer to the ethylene-methyl acrylate-glycidyl methacrylate terpolymer is from 1.1:1 to 2.5:1, such as 1:1, 2:1, or 2.5:1, or other values ​​within the range of 1:1 to 2.5:1, preferably 1:1.

[0043] The refractive index of MBS used in the aforementioned toughening agent is close to that of PC and PCTG, having almost no impact on the transparency of the PC / PCTG alloy. Furthermore, the small particle size of MBS allows for uniform distribution within the alloy material, which is beneficial for improving its impact strength. The ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMMA-GMA) used in the aforementioned toughening agent exhibits high reactivity, increasing the compatibility of PC and PCTG and further enhancing the impact strength of the alloy product. Blending methyl methacrylate-butadiene-styrene copolymer and ethylene-methyl acrylate-glycidyl methacrylate terpolymer in the aforementioned proportions is beneficial for achieving better overall performance in the alloy product.

[0044] In this invention, antioxidants may, by way of example but not by way of limitation, include at least one of the following: pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (abbreviated as antioxidant 1010), N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide) (abbreviated as antioxidant 1098), tris[2,4-di-tert-butylphenyl] phosphite (abbreviated as antioxidant 168), oxaloyl(diimino-2,1-ethylidene)propionate (abbreviated as antioxidant 697), and bis(2,4-dicumylphenyl) pentaerythritol diphosphite (abbreviated as antioxidant 608), preferably including at least two of the above substances.

[0045] In some typical embodiments, the antioxidants include antioxidant 1010 and antioxidant 608. The mass ratio of antioxidant 1010 to antioxidant 608 can be from 1:1 to 1:2.5, such as 1:1, 1:2 or 1:2.5, preferably 1:1.

[0046] In this invention, the lubricant may, by way of example but not by way of limitation, include at least one of polyethylene wax, OP wax, PETS, montan wax and calcium stearate.

[0047] In some typical implementations, the lubricant includes PETS.

[0048] In this invention, the transesterification inhibitor may, by way of example but not by way of limitation, include at least one of sodium dihydrogen phosphate, sodium pyrophosphate, sodium metaphosphate, tetraethyl orthosilicate, triethyl phosphite, triphenyl phosphite, diisooctyl phosphate, and alkyl phosphates.

[0049] In some typical implementations, transesterification inhibitors include triphenyl phosphite.

[0050] As mentioned above, the PC / PCTG alloy prepared from the raw materials provided in this application can possess high transparency, high impact resistance, heat resistance, and chemical resistance, making it suitable for a wide range of applications.

[0051] Accordingly, the present invention also provides a method for preparing the above-mentioned high impact resistance, transparent chemical resistance PC / PCTG alloy, comprising the following steps: extruding, cooling, granulating, drying and injection molding the prepared raw materials after mixing according to the formula.

[0052] The extrusion process utilizes a twin-screw extruder with 11 temperature zones. The temperatures of these zones are 118℃~122℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, and 238℃~242℃, respectively. The twin-screw extruder rotates at a speed of 200 rpm to 300 rpm.

[0053] In some typical implementations, the temperatures of the 11 temperature zones of the twin-screw extruder are 120°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, 230°C, and 240°C, respectively, and the rotational speed of the twin-screw extruder is 240 rpm.

[0054] It should be noted that the preparation processes not described in detail above can be referred to relevant existing technologies, and will not be elaborated or limited here.

[0055] Furthermore, this invention also provides applications of the aforementioned high-impact, transparent, and chemical-resistant PC / PCTG alloy. For example, it can be used not only in the glass assembly industry, automotive industry, electronics and electrical appliances, mechanical parts, optical discs, packaging, office equipment such as computers, medical and health care, films, leisure and protective equipment, etc., but also in environments requiring chemical resistance, transparency, a certain degree of drop resistance, and certain heat resistance, such as in household appliances such as robot vacuum cleaners.

[0056] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0057] Example 1

[0058] This embodiment provides a high-impact, transparent, and chemically resistant PC / PCTG alloy material. By weight, its preparation raw materials include 30 parts PC resin, 67.1 parts PCTG, 2 parts toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant, and 0.3 parts transesterification inhibitor.

[0059] The PC resin is a transparent bisphenol A type polycarbonate with a light transmittance of 89%. The toughening agent is methyl methacrylate-styrene-silicone-butyl acrylate. The antioxidant consists of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and bis(2,4-dicumylphenyl)pentaerythritol diphosphite in a 1:1 mass ratio. The lubricant is PETS. The transesterification inhibitor is triphenyl phosphite.

[0060] The preparation of this PC / PCTG alloy material includes: mixing the raw materials in a high-speed mixer according to the specified ratio, then extruding the mixture in a twin-screw extruder, followed by water-cooled granulation, drying, and injection molding. The temperatures of the 11 zones of the twin-screw extruder are set to 120℃, 230℃, 230℃, 230℃, 230℃, 230℃, 230℃, 230℃, 230℃, and 240℃, respectively, and the main extruder speed is 240 rpm.

[0061] Example 2

[0062] The difference between this embodiment and Embodiment 1 is that the toughening agent is methyl methacrylate-butadiene styrene copolymer.

[0063] Example 3

[0064] The difference between this embodiment and Embodiment 1 is that the toughening agent is an ethylene-methyl acrylate-glycidyl methacrylate copolymer.

[0065] Example 4

[0066] The difference between this embodiment and Embodiment 1 is that the toughening agent is a methyl methacrylate-butadiene-styrene copolymer and an ethylene-methyl acrylate-glycidyl methacrylate terpolymer with a mass ratio of 1:1.

[0067] Example 5

[0068] The difference between this embodiment and Embodiment 4 is that the raw materials include 30 parts PC resin, 65 parts PCTG, 4.1 parts toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant and 0.3 parts transesterification inhibitor.

[0069] Example 6

[0070] The difference between this embodiment and Embodiment 4 is that the raw materials include 30 parts PC resin, 68 parts PCTG, 1.1 parts toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant and 0.3 parts transesterification inhibitor.

[0071] Example 7

[0072] The difference between this embodiment and Embodiment 4 is that methyl methacrylate-styrene-silicone-butyl acrylate is used in an equal amount to replace methyl methacrylate-butadiene-styrene copolymer. That is, the toughening agent in this embodiment is composed of methyl methacrylate-styrene-silicone-butyl acrylate and ethylene-methyl methacrylate-glycidyl methacrylate terpolymer.

[0073] Example 8

[0074] The difference between this embodiment and Embodiment 4 is as follows: the PC resin is a transparent bisphenol A type polycarbonate with a light transmittance of 89%. The toughening agent is ethylene-acrylic plastic. The antioxidant is N,N'-hexamethylenebis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide). The lubricant is polyethylene wax. The transesterification inhibitor is sodium dihydrogen phosphate.

[0075] The preparation of this PC / PCTG alloy material includes: mixing the raw materials in a high-speed mixer according to the specified ratio, then extruding the mixture in a twin-screw extruder, followed by water-cooled granulation, drying, and injection molding. The temperatures of the 11 zones of the twin-screw extruder are set to 118℃, 228℃, 228℃, 228℃, 228℃, 228℃, 228℃, 228℃, 228℃, and 238℃, respectively, and the main extruder speed is 200 rpm.

[0076] Comparative Example 1

[0077] The difference between this comparative example and Example 4 is that the raw materials used in its preparation include 99.4 parts of PC resin, 0.4 parts of antioxidant, and 0.2 parts of lubricant.

[0078] Comparative Example 2

[0079] The difference between this comparative example and Example 4 is that the raw materials used in its preparation include 99.4 parts PCTG, 0.4 parts antioxidant, and 0.2 parts lubricant.

[0080] Comparative Example 3

[0081] The difference between this comparative example and Example 4 is that the raw materials used in its preparation include 30 parts PC resin, 69.1 parts PCTG, 0.4 parts antioxidant, 0.2 parts lubricant, and 0.3 parts transesterification inhibitor. That is, this comparative example does not contain toughening agents.

[0082] Comparative Example 4

[0083] The difference between this comparative example and Example 4 is that the raw materials used in its preparation include 10 parts PC resin, 88.1 parts PCTG, 1 part toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant, and 0.3 parts transesterification inhibitor.

[0084] Comparative Example 5

[0085] The difference between this comparative example and Example 4 is that the raw materials used in its preparation include 20 parts PC resin, 78.1 parts PCTG, 1 part toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant, and 0.3 parts transesterification inhibitor.

[0086] Comparative Example 6

[0087] The difference between this embodiment and Embodiment 4 is that the raw materials include 30 parts PC resin, 68.1 parts PCTG, 1 part toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant, and 0.3 parts transesterification inhibitor.

[0088] Comparative Example 7

[0089] The difference between this embodiment and embodiment 4 is that the raw materials include 40 parts PC resin, 58.1 parts PCTG, 1 part toughening agent, 0.4 parts antioxidant, 0.2 parts lubricant and 0.3 parts transesterification inhibitor.

[0090] Comparative Example 8

[0091] The difference between this embodiment and Embodiment 4 is that the raw materials include 50 parts of PC resin, 48.1 parts of PCTG, 1 part of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

[0092] Test case

[0093] The materials prepared in Examples 1-8 and Comparative Examples 1-8 were subjected to the following performance tests, and the results are shown in Table 1.

[0094] The chemical corrosion resistance test conditions were as follows: temperature 20℃±5℃; relative humidity ≤75%; air pressure within the normal atmospheric pressure range of 86KPa~106KPa; the reagents, floor cleaner, alcohol, Blue Moon laundry detergent, Mr. Muscle, and 84 disinfectant were applied to the sample strip respectively, the sample strip was kept bent using a stress test fixture, left for 7 days, and then placed at room temperature for 2 hours to recover before the sample was examined.

[0095] Light transmittance was measured using a light transmittance tester; haze was measured using a light transmittance tester; and notched impact strength at room temperature was measured in accordance with ISO 179.

[0096] Table 1 Test Results

[0097]

[0098]

[0099] As shown in Table 1, the high-impact, transparent, and chemically resistant PC / PCTG alloy material provided by this invention, compared with ordinary PC, exhibits higher heat resistance and excellent chemical resistance without affecting light transmittance and impact resistance. In this invention, a PC to PCTG mass ratio of approximately 3:6.5 to 3:6.8 satisfies the requirements for heat resistance and chemical resistance. Excessive PC content leads to decreased transparency, insufficient chemical resistance, and reduced impact strength; conversely, excessive PCTG content reduces the heat resistance of the alloy material.

[0100] In Example 4, the methyl methacrylate-butadiene styrene copolymer selected is a transparent toughening agent. Its refractive index is close to that of PC and PCTG, and it does not affect the transparency of the PC / PCTG alloy. If the refractive index difference is too large, it will lead to light scattering and affect the transparency. In addition, the methyl methacrylate-butadiene styrene copolymer has a small particle size and is more uniformly distributed in the system, which improves the impact strength of the system. The ethylene-methyl acrylate-glycidyl methacrylate selected in this scheme has high reactivity, which can further increase the compatibility of PC and PCTG and further improve the impact strength. The combination of the two makes the alloy product corresponding to Example 4 have the best comprehensive performance, and can have high transparency, high impact, heat resistance, and chemical resistance.

[0101] A comparison of Examples 2-4 and Example 7 shows that the methyl methacrylate-butadiene-styrene copolymer and the ethylene-methyl acrylate-glycidyl methacrylate terpolymer in the toughening agent have a certain synergistic effect.

[0102] In summary, the raw material combination and ratio for preparing PC / PCTG alloys provided by this invention are beneficial for preparing PC / PCTG alloy products with high transparency, high impact resistance, heat resistance, and chemical resistance. These products can be used not only in the glass assembly industry, automotive industry, electronics, mechanical parts, optical discs, packaging, office equipment such as computers, medical and health care, films, leisure and protective equipment, but also in environments requiring chemical resistance, transparency, a certain degree of drop resistance, and certain heat resistance, such as in household appliances like robotic vacuum cleaners.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-impact, transparent, and chemically resistant PC / PCTG alloy, characterized in that, The raw materials for preparing the high impact-resistant, transparent, and chemically resistant PC / PCTG alloy, by weight, include 10-50 parts of PC, 20-90 parts of PCTG, 1-5 parts of toughening agent, 0.3-0.5 parts of antioxidant, 0.2-0.5 parts of lubricant, and 0.2-0.4 parts of transesterification inhibitor. The mass ratio of PC to PCTG is 3:6.5 to 3:6.8; The toughening agent comprises methyl methacrylate-butadiene-styrene copolymer and ethylene-methyl acrylate-glycidyl methacrylate terpolymer in a mass ratio of 1:1 to 2.5:

1.

2. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 1, characterized in that, The raw materials for preparation include 30 parts of PC, 65-68 parts of PCTG, 1-4.1 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

3. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 2, characterized in that, The raw materials for preparation include 30 parts of PC, 67.1 parts of PCTG, 2 parts of toughening agent, 0.4 parts of antioxidant, 0.2 parts of lubricant and 0.3 parts of transesterification inhibitor.

4. The high-impact, transparent, and chemically resistant PC / PCTG alloy according to any one of claims 1 to 3, characterized in that, The PC is a transparent bisphenol A polycarbonate with a light transmittance of ≥89%.

5. The high-impact, transparent, chemically resistant PC / PCTG alloy according to any one of claims 1 to 3, characterized in that, The antioxidant includes at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide), tris[2,4-di-tert-butylphenyl] phosphite, oxaloyl(diimino-2,1-ethylidene)propionate (3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

6. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 5, characterized in that, The antioxidants include at least two of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide), tris[2,4-di-tert-butylphenyl] phosphite, oxaloyl(diimino-2,1-ethylidene)propionate (3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

7. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 6, characterized in that, The antioxidants include pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

8. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 7, characterized in that, The mass ratio of the tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] pentaerythritol ester and the bis(2,4-dicumylphenyl) pentaerythritol-diphosphite ester is from 1:1 to 1:2.

5.

9. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to any one of claims 1 to 3, characterized in that, The lubricant includes at least one of polyethylene wax, OP wax, PETS, montana wax, and calcium stearate.

10. The high-impact, transparent, and chemically resistant PC / PCTG alloy according to claim 9, characterized in that, The lubricant includes PETS.

11. The high-impact, transparent, chemically resistant PC / PCTG alloy according to any one of claims 1 to 3, characterized in that, The transesterification inhibitors include at least one of sodium dihydrogen phosphate, sodium pyrophosphate, sodium metaphosphate, tetraethyl orthosilicate, triethyl phosphite, triphenyl phosphite, and alkyl phosphates.

12. The high impact-resistant, transparent, and chemically resistant PC / PCTG alloy according to claim 11, characterized in that, The transesterification inhibitors include triphenyl phosphite.

13. A method for preparing a high-impact, transparent, chemically resistant PC / PCTG alloy as described in any one of claims 1 to 12, characterized in that, The process includes the following steps: extruding, cooling, granulating, drying, and injection molding the prepared raw materials after mixing them according to the specified ratio.

14. The preparation method according to claim 13, characterized in that, The extrusion is carried out using a twin-screw extruder, which has 11 temperature zones. The temperatures of the 11 temperature zones are 118℃~122℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, 228℃~232℃, and 238℃~242℃, respectively. The rotational speed of the twin-screw extruder is 200 rpm~300 rpm.

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