A PC / ABS alloy material and its preparation method and application

Abstract

The present invention relates to the technical field of high-performance resin materials, specifically a PC / ABS alloy material, its preparation method, and its application. The material comprises the following components: 50-95 parts by weight of PC; 5-50 parts by weight of ABS; 0-10 parts by weight of a third resin; 0-10 parts by weight of a toughening agent; 1-15 parts by weight of a flame retardant; 0.1-5 parts by weight of a heat stabilizer; and 0.1-5 parts by weight of a light stabilizer. The preparation method comprises: uniformly mixing PC, ABS, the third resin, the toughening agent, the flame retardant, the heat stabilizer, and the light stabilizer in a high-speed mixer; feeding the resulting stirred mixture into a twin-screw extruder; setting the temperature of each zone of the twin-screw extruder to 200-300°C and the main engine speed to 300-1000 rpm; and then subjecting the extruder to melt extrusion, water cooling, air drying, pelletizing, vibratory screening, homogenization, and drying to obtain the PC / ABS alloy material. The material exhibits excellent resistance to chemicals and gamma-ray radiation, as well as excellent mechanical retention, and can be used in the manufacture of medical devices such as dialysis, injection, and diagnostic equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of high-performance resin materials, in particular to a PC / ABS alloy material, a preparation method and an application thereof. Background Art

[0002] With the continuous advancement of medical technology and people's growing demand for health, medical-grade plastic materials, due to their excellent physical and biocompatibility properties, are increasingly in demand. They are widely used in medical devices, medical equipment, and disposable medical supplies. This is particularly true in high-end medical applications such as surgical instruments, medical containers, artificial joints, and dental implants. Major manufacturers worldwide are increasing investment and increasing production capacity to meet this growing market demand. This sector possesses strong market appeal and development potential.

[0003] Polycarbonate / acrylonitrile-butadiene-styrene (PC / ABS) alloys, with their outstanding performance and wide applicability, offer significant competitive advantages, making them a key material choice in the medical industry. To ensure the safety of medical products, in addition to meeting biocompatibility requirements for medical devices, medical-grade alloys must also withstand sterilization processes such as high-concentration alcohol, iodine, ethylene oxide, gamma radiation, and electron beam radiation without cracking or embrittlement, while maintaining excellent physical property retention. In the medical and pharmaceutical sectors, PC / ABS alloys are primarily used in the following areas: 1. Medical device housings: They can be used to manufacture housings for various medical devices, such as monitors, infusion pumps, and ultrasonic equipment; 2. Disposable medical supplies: They can be used to manufacture disposable syringes, catheters, and other disposable devices due to their excellent formability and strength; 3. Laboratory equipment: They are used in test tubes, culture dishes, and other labware due to their chemical resistance and transparency; 4. Dental equipment: They are used in dental instruments and auxiliary equipment, meeting high hygiene standards and durability requirements. With the development of medical-grade PC / ABS materials and technologies, their application scope and performance need to be continuously improved to meet the demands of modern medical equipment.

[0004] In response to the urgent demand for medical-grade plastic alloy materials in the medical and health fields, we have developed a PC / ABS alloy material that is resistant to chemicals, gamma-ray radiation, and has high impact resistance. This solves key technical problems in the industry and plays a very important supporting role in the vigorous development of my country's medical, public health, and health industries. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a PC / ABS alloy material with excellent resistance to chemicals and gamma ray radiation and mechanical retention rate, which can be used to manufacture medical equipment such as dialysis, injection, and diagnosis, as well as a preparation method and application, to solve the problem in the background technology that PC / ABS alloys are easily degraded in material performance and shortened in life cycle after being treated with chemicals and irradiated with gamma rays.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PC / ABS alloy material comprising the following components: 50 to 95 parts by weight of PC; 5 to 50 parts by weight of ABS; 0 to 10 parts by weight of a third resin; 0 to 10 parts by weight of a toughening agent; 1 to 15 parts by weight of a flame retardant; 0.1 to 5 parts by weight of a heat stabilizer; and 0.1 to 5 parts by weight of a light stabilizer.

[0007] Further,

[0008] PC is composed of a chain segment represented by formula (1) and a structural unit represented by formula (2), wherein the molar ratio of formula (1) to formula (2) is 80:20 to 99.95:0.05.

[0009]

[0010] In formula (1), R1 to R8 are selected from H, C1 to C 24 Hydrocarbon groups, C3~C 30 Cyclic hydrocarbon groups, C1~C 24 Halogenated hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C1~C 24 Nitroalkyl or C3~C 30 One or more of the nitrocyclic hydrocarbon groups;

[0011] And / or any two adjacent groups of R1 to R8 are directly bonded to form C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon group;

[0012] X is a single bond, C1~C 24 Alkylidene, C3~C 30 One of a cycloalkylidene group, an oxy group, a sulfenyl group, a sulfinic acid group, a sulfonic acid group or a carbonyl group; n is an integer from 10 to 5000;

[0013] In formula (2), Y is C1~C 24 Alkylidene, C3~C 30 * represents the bond between the structural unit represented by formula (2) and the segment represented by formula (1) or the bond between the structural unit represented by formula (2).

[0014] Furthermore, the following components are included: 60-90 parts by weight of PC; 10-40 parts by weight of ABS; 2-8 parts by weight of a third resin; 2-10 parts by weight of a toughening agent; 2-15 parts by weight of a flame retardant; 0.5-2.5 parts by weight of a heat stabilizer; and 0.5-2.5 parts by weight of a light stabilizer.

[0015] Furthermore, the ABS is prepared by an emulsion method, an emulsion-blending method or a bulk method; the molar ratio of the acrylonitrile component, the butadiene component and the styrene component in the ABS is (10-35):(5-25):(40-85); and the melt index of the ABS at 220° C. and a load of 5 kg is 2-40 g / 10 min.

[0016] Furthermore, the third resin is selected from one or more of poly(C1-C24) acrylic acid esters, poly(C1-C24) methacrylic acid esters, styrene / C1-C24) acrylic acid ester copolymers, styrene / C1-C24) methacrylic acid ester copolymers, styrene / maleic anhydride copolymers, styrene / C1-C24) acrylic acid ester / maleic anhydride copolymers, and styrene / C1-C24) methacrylic acid ester / maleic anhydride copolymers.

[0017] Furthermore, the toughening agent is selected from one or more of ABS high rubber powder, butadiene rubber, styrene-butadiene rubber, pentadiene styrene rubber, styrene / butadiene / styrene block copolymer rubber, styrene / isoprene / styrene block copolymer rubber, ethylene / styrene / butadiene / styrene copolymer rubber, ethylene / styrene / isoprene / styrene copolymer rubber and maleic anhydride grafted products of the above substances.

[0018] Furthermore, the flame retardant is selected from one or more of phosphazene, aliphatic oxyphosphazene, aromatic oxyphosphazene, polysiloxane, polyaliphatic siloxane, polyaromatic siloxane, sodium benzenesulfonylbenzenesulfonate, calcium benzenesulfonylbenzenesulfonate, aluminum benzenesulfonylbenzenesulfonate, and zinc benzenesulfonylbenzenesulfonate.

[0019] Alternatively, the flame retardant is a combination of aromatic oxyphosphazene and polysiloxane, preferably a combination of aromatic oxyphosphazene, polysiloxane and sodium benzenesulfonylbenzenesulfonate;

[0020] The heat stabilizer is selected from one or more of calcium oxide, zinc oxide, calcium carbonate, zinc carbonate, calcium sulfate or zinc sulfate;

[0021] The light stabilizer is selected from one or more of benzotriazole, pyrogallol, hydroxybenzoate and derivatives thereof.

[0022] Further,

[0023] In the formula (1), n ​​is an integer of 100 to 3000, preferably an integer of 500 to 3000;

[0024] The molar ratio of formula (1) to formula (2) is 85:15 to 99.5:0.5, preferably 90:10 to 99:1;

[0025] X in the formula (1) is one or more of a methylene group, a cyclohexane group or a phenylene group; Y in the formula (2) is one or more of a methylene group, an ethylene group, a hexane group, a cyclohexane group or a phenylene group, preferably one or more of a cyclohexane group or a phenylene group;

[0026] The formula (1) is one or more of bisphenol A carbonate segments, biphenyl carbonate segments or benzophenone carbonate segments.

[0027] Preparation method of PC / ABS alloy material,

[0028] (1) A diol represented by formula (3), a tetraol represented by formula (4), a dialkyl carbonate represented by formula (5), a catalyst, and a thermal stabilizer are placed in a stirred reactor, replaced with inert gas multiple times, and stirred at an initial temperature under inert gas protection for a period of time t1; then, a reaction is carried out at a certain reaction temperature and pressure for a period of time t2; the reaction is carried out under inert gas protection, unloading, cooling, and granulation to obtain polycarbonate resin particles PC;

[0029]

[0030] In formula (3),

[0031] R1 to R8 are selected from H, C1 to C 24 Hydrocarbon groups, C3~C 30 Cyclic hydrocarbon groups, C1~C 24 Halogenated hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C1~C 24 Nitroalkyl or C3~C 30 One or more of the nitrocyclic hydrocarbon groups;

[0032] And / or any two adjacent groups of R1 to R8 are directly bonded to form C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon group;

[0033] X is a single bond, C1~C 24 Alkylidene, C3~C 30 One of a cycloalkylidene group, an oxy group, a sulfenyl group, a sulfinic acid group, a sulfonic acid group or a carbonyl group;

[0034] In formula (4), Y is C1~C 24 Alkylidene, C3~C30 Cycloalkylene;

[0035] In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon groups, C3~C 30 One or more of the cyclic hydrocarbon groups, preferably C4 to C 22 Hydrocarbon groups, C5~C 24 One or more of the cyclic hydrocarbon groups;

[0036] (2) PC, ABS, a third resin, a toughening agent, a flame retardant, a heat stabilizer, and a light stabilizer are uniformly mixed in a high-speed mixer, and the obtained stirred mixture is fed into a twin-screw extruder;

[0037] (3) Set the temperature of each zone of the twin-screw extruder to 200-300°C and the main engine speed to 300-1000 rpm;

[0038] (4) The PC / ABS alloy material is obtained by melt extrusion, water cooling, air drying, pelletizing, vibration screening, homogenization, and drying.

[0039] An application of PC / ABS alloy material,

[0040] The PC / ABS alloy material is used in the medical, public health or health fields, and is used to manufacture medical device housings and medical equipment appliances.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The tetracarboxyl-containing porphyrin monomer of the present invention imparts a branched structure to polycarbonate, improving the processing performance of PC / ABS alloys, particularly in the manufacture of thin-walled parts. It also enhances the PC / ABS alloy's resistance to organic chemicals and radiation aging, achieving excellent technical results. The combination of a phosphazene compound with polysiloxane, or with polysiloxane and phenylsulfonylbenzenesulfonate, imparts excellent fire retardancy to the PC / ABS alloy and improves its solvent resistance. Micro- and nanoscale heat stabilizers and light stabilizers can effectively enhance the long-term stability of the PC / ABS alloy. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] The PC-1 of the present invention is prepared by mixing 2280 g of bisphenol A, 2354 g of diphenyl carbonate and 384.5 g of 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin in the presence of 0.67 g of sodium bicarbonate, replacing the mixture with nitrogen three times, stirring the mixture at an initial temperature of 175°C and a speed of 500 rpm for 40 minutes, and then heating the mixture at 195°C and 10 -4 The reaction was carried out under atm pressure for 400 minutes, followed by nitrogen protection, unloading, cooling, and granulation.

[0045] PC-2 is bisphenol A polycarbonate, a product of Covestro;

[0046] ABS is a product of Zhenjiang Chimei Co., Ltd.; polymethyl methacrylate is a product of Evonik;

[0047] ABS high-glue powder is a product of Kumho Corporation;

[0048] Ethylene / styrene / butadiene / styrene copolymer rubber is a product of Hunan Petrochemical Company;

[0049] Hexaphenoxycyclotriphosphazene is a product of Tokyo Chemical Industry Co., Ltd.

[0050] Polysiloxane is a product of Sigma-Aldrich;

[0051] Sodium benzenesulfonylbenzenesulfonate is a product of Shanghai Taijilin Company;

[0052] Zinc sulfate was a product of Sigma-Aldrich;

[0053] 2-(2H-Benzotriazol-2-yl)-p-cresol is a product of Shanghai Haipu Chemical Company.

[0054] Example 1:

[0055] A PC / ABS alloy material comprises the following components: 50-95 parts by weight of PC; 5-50 parts by weight of ABS; 0-10 parts by weight of a third resin; 0-10 parts by weight of a toughening agent; 1-15 parts by weight of a flame retardant; 0.1-5 parts by weight of a heat stabilizer; and 0.1-5 parts by weight of a light stabilizer.

[0056] Preferably, PC 60-90 parts by weight; ABS 10-40 parts by weight; third resin 2-8 parts by weight; toughening agent 2-10 parts by weight; flame retardant 2-15 parts by weight; heat stabilizer 0.5-2.5 parts by weight; light stabilizer 0.5-2.5 parts by weight.

[0057] in:

[0058] PC is composed of a chain segment represented by formula (1) and a structural unit represented by formula (2), wherein the molar ratio of formula (1) to formula (2) is 80:20 to 99.95:0.05, preferably 85:15 to 99.5:0.5, and more preferably 90:10 to 99:1.

[0059]

[0060] In formula (1), R1 to R8 are each selected from H, C1 to C 24 Hydrocarbon groups, C3~C 30 Cyclic hydrocarbon groups, C1~C 24 Halogenated hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C1~C 24 Nitroalkyl, C3~C 30 and / or any two adjacent groups of R1 to R8 are directly bonded to form a C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon group;

[0061] X is a single bond, C1~C 24 Alkylidene, C3~C 30 cycloalkylidene, oxy, thiol, sulfinic acid, sulfonic acid, carbonyl, preferably a single bond, methylene, cyclohexane ylidene, phenylene, oxy, carbonyl;

[0062] n is an integer of 10 to 5000, preferably an integer of 100 to 3000, more preferably an integer of 500 to 3000;

[0063] The chain segment represented by formula (1) is more preferably at least one of a bisphenol A carbonate chain segment, a biphenyl carbonate chain segment, and a benzophenone carbonate chain segment;

[0064] In formula (2), Y is C1~C 24 Alkylidene, C3~C 30 cycloalkylidene group; preferably methylene, ethylene, hexylene, cyclohexylidene group, phenylene group, more preferably cyclohexylidene group, phenylene group; * represents the bond between the structural unit represented by formula (2) and the segment represented by formula (1) or the bond between the structural unit represented by another formula (2).

[0065] The ABS is prepared by an emulsion method, an emulsion-blending method, or a bulk method; the molar ratio of the acrylonitrile component, the butadiene component, and the styrene component in the ABS is (10-35):(5-25):(40-85); and the melt index of the ABS at 220° C. and a load of 5 kg is 2-40 g / 10 min.

[0066] The third resin is selected from one or more of poly (C1-C24) acrylic acid esters, poly (C1-C24) methacrylic acid esters, styrene / C1-C24) acrylic acid ester copolymers, styrene / C1-C24) methacrylic acid ester copolymers, styrene / maleic anhydride copolymers, styrene / C1-C24) acrylic acid ester / maleic anhydride copolymers, and styrene / C1-C24) methacrylic acid ester / maleic anhydride copolymers.

[0067] The toughening agent is selected from one or more of ABS high rubber powder, butadiene rubber, styrene-butadiene rubber, pentyl styrene rubber, styrene / butadiene / styrene block copolymer rubber, styrene / isoprene / styrene block copolymer rubber, ethylene / styrene / butadiene / styrene copolymer rubber, ethylene / styrene / isoprene / styrene copolymer rubber and maleic anhydride grafted products of the above substances.

[0068] The flame retardant is selected from one or more of phosphazene, aliphatic oxyphosphazene, aromatic oxyphosphazene, polysiloxane, polyaliphatic siloxane, polyaromatic siloxane, sodium benzenesulfonylbenzenesulfonate, calcium benzenesulfonylbenzenesulfonate, aluminum benzenesulfonylbenzenesulfonate, and zinc benzenesulfonate, preferably a combination of aromatic oxyphosphazene and polysiloxane, more preferably a combination of aromatic oxyphosphazene, polysiloxane and sodium benzenesulfonylbenzenesulfonate;

[0069] The heat stabilizer is selected from one or more of calcium oxide, zinc oxide, calcium carbonate, zinc carbonate, calcium sulfate or zinc sulfate;

[0070] The light stabilizer is selected from one or more of benzotriazole, pyrogallol, hydroxybenzoate and derivatives thereof.

[0071] Preparation method of PC / ABS alloy material,

[0072] 1. Putting the diol represented by formula (3), the tetraol represented by formula (4), the dialkyl carbonate represented by formula (5), a catalyst and a heat stabilizer into a stirred reactor, replacing the mixture with inert gas multiple times, stirring the mixture at the initial temperature for a period of time t1 under the protection of inert gas; then reacting the mixture at a certain reaction temperature and pressure for a period of time t2; filling the reactor with inert gas protection, unloading, cooling and granulating the mixture to obtain polycarbonate resin particles PC; the stirring rate is 10 to 1000 rpm, preferably 50 to 800 rpm;

[0073] The initial temperature is 120-240°C, preferably 150-200°C; the time t1 is 5-120 minutes, preferably 15-100 minutes; the inert gas is nitrogen, argon or helium; the reaction temperature is 150-280°C, preferably 180-250°C; the pressure is 10 -6 ~10 -3atm, preferably 10 -5 ~10 -3 atm; the time t2 is 30 to 600 minutes, preferably 60 to 450 minutes.

[0074] The molar ratio of the total molar amount of formula (3) and formula (4) to the molar amount of formula (5) is 1: (0.90-1.30), preferably 1: (0.98-1.20); more preferably 1: (1.01-1.10);

[0075] The amount of the catalyst is 0.0001% to 0.05% of the total molar amount of the formula (3), formula (4) and formula (5), preferably 0.001% to 0.025%;

[0076] The amount of the heat stabilizer is 0.01% to 1% of the total weight of the formula (3), formula (4) and formula (5), preferably 0.05% to 0.75%.

[0077] The catalyst is selected from one or more of sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, dibutyltin dilaurate, dihexyltin dilaurate, dioctyltin dilaurate, and didecyltin dilaurate; preferably, it is a combination of sodium bicarbonate and dioctyltin dilaurate; the molar ratio of the sodium bicarbonate to the dioctyltin dilaurate is 1:9 to 9:1;

[0078] The heat stabilizer is selected from one or more of calcium oxide, zinc oxide, calcium carbonate, zinc carbonate, calcium sulfate and zinc sulfate.

[0079]

[0080] In formula (3),

[0081] R1 to R8 are selected from H, C1 to C 24 Hydrocarbon groups, C3~C 30 Cyclic hydrocarbon groups, C1~C 24 Halogenated hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C1~C 24 Nitroalkyl or C3~C 30 One or more of the nitrocyclic hydrocarbon groups; and / or any two adjacent groups of R1 to R8 are directly bonded to form a C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon group;

[0082] X is a single bond, C1~C 24 Alkylidene, C3~C 30One of a cycloalkylidene group, an oxy group, a sulfenyl group, a sulfinic acid group, a sulfonic acid group or a carbonyl group;

[0083] In formula (4), Y is C1~C 24 Alkylidene, C3~C 30 Cycloalkylene;

[0084] In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon groups, C3~C 30 One or more of the cyclic hydrocarbon groups, preferably C4 to C 22 Hydrocarbon groups, C5~C 24 One or more of the cyclic hydrocarbon groups;

[0085] 2. Mix PC, ABS, the third resin, toughening agent, flame retardant, heat stabilizer and light stabilizer in a high-speed mixer, and feed the obtained stirred mixture into a twin-screw extruder;

[0086] 3. Set the temperature of each zone of the twin-screw extruder to 200-300°C and the main engine speed to 300-1000 rpm;

[0087] 4. The PC / ABS alloy material is obtained through melt extrusion, water cooling, air cooling and drying, pelletizing, vibration screening, homogenization and drying.

[0088] An application of PC / ABS alloy material,

[0089] The PC / ABS alloy material is used in the medical, public health or health fields, and is used to manufacture medical device housings and medical equipment appliances.

[0090] Example 2 to Example 7:

[0091] According to the composition in Table 1, PC-1, PC-2, ABS, a third resin, a toughening agent, a flame retardant, a heat stabilizer, and a light stabilizer were uniformly mixed in a high-speed mixer, and the obtained stirred mixture was fed into a twin-screw extruder; the temperature of each zone of the twin-screw extruder was set at 200-300° C., and the main engine speed was set at 300-1000 rpm; and the PC / ABS alloy material was obtained by melt extrusion, water cooling, air drying, pelletizing, vibration screening, homogenization, and drying.

[0092] Comparative Example 1 to Comparative Example 3:

[0093] PC-2, ABS, a third resin, a toughening agent, a flame retardant, a heat stabilizer, and a light stabilizer are uniformly mixed in a high-speed mixer, and the obtained stirred mixture is fed into a twin-screw extruder; the temperature of each zone of the twin-screw extruder is set at 200-300° C., and the main engine speed is set at 300-1000 rpm; and the PC / ABS alloy material is obtained through melt extrusion, water cooling, air cooling and drying, pelletizing, vibration screening, homogenization, and drying.

[0094] Comprehensive performance tests were conducted on Examples 2 to 7 and Comparative Examples 1 to 3:

[0095] The test conditions are as follows: injection molding is performed on an injection molding machine, and the specimens are placed in a constant temperature and humidity chamber with a humidity of 50% and a temperature of 23° C. for 48 hours.

[0096] Notched impact strength: tested according to ISO 179 standard;

[0097] Flexural modulus: tested according to ISO 178 standard, speed 2mm / min;

[0098] Chemical resistance test: Soak the injection molded specimens in 95% alcohol for 24 hours, then test the notched impact strength and flexural modulus;

[0099] Gamma ray resistance test: The injection molded specimens were irradiated with 50kGy of gamma rays for 24 hours, and then tested for notched impact strength and flexural modulus.

[0100] The performance obtained from the test is shown in Table 1.

[0101] Table 1 Properties of the resin materials in Examples 2 to 7 and Comparative Examples 1 to 3

[0102]

[0103]

[0104] By comparing the data of Examples 2 to 7 with Comparative Examples 1 to 3 in Table 1, it can be seen that the notched impact strength and flexural modulus of the alloy material obtained by using 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin with bisphenol A, diphenyl carbonate ternary copolycarbonate, and ABS as the matrix resin, supplemented by acrylic resin, and a combination of phosphazene, polysiloxane and benzoxazole flame retardants, as well as zinc sulfate and 2-(2H-benzotriazole-2-yl)-p-cresol stabilizers are better than those of the combination in the comparative example, and the strength and modulus values ​​after disinfection reagent and gamma ray treatment are much higher than the latter, showing the technical advantages of the present invention.

[0105] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PC / ABS alloy material, characterized in that: The invention comprises the following components: 50 to 95 parts by weight of PC; 5 to 50 parts by weight of ABS; 0 to 10 parts by weight of a third resin; 0 to 10 parts by weight of a toughening agent; 1 to 15 parts by weight of a flame retardant; 0.1 to 5 parts by weight of a heat stabilizer; and 0.1 to 5 parts by weight of a light stabilizer. The third resin is selected from one or more of poly (C1 to C24) acrylic acid esters, poly (C1 to C24) methacrylic acid esters, styrene / C1 to C24 acrylic acid ester copolymers, styrene / C1 to C24 methacrylic acid ester copolymers, styrene / maleic anhydride copolymers, styrene / C1 to C24 acrylic acid ester / maleic anhydride copolymers, and styrene / C1 to C24 methacrylic acid ester / maleic anhydride copolymers. PC is composed of a chain segment represented by formula (1) and a structural unit represented by formula (2), wherein the molar ratio of formula (1) to formula (2) is 80:20 to 99.95:0.

05. In formula (1), R1 to R8 are selected from H, C1 to C 24 Hydrocarbon groups, C1~C 24 Halogenated hydrocarbon or C1~C 24 One of the nitroalkyl groups; X is a single bond, C1~C 24 Alkylidene, C3~C 30 One of a cycloalkylidene group, an oxy group, a sulfenyl group, a sulfinic acid group, a sulfonic acid group or a carbonyl group; n is an integer from 10 to 5000; In formula (2), Y is C1~C 24 Alkylidene, C3~C 30 * represents the bond between the structural unit represented by formula (2) and the segment represented by formula (1) or the bond between the structural unit represented by formula (2).

2. The PC / ABS alloy material according to claim 1, characterized in that: The invention comprises the following components: 60-90 parts by weight of PC; 10-40 parts by weight of ABS; 2-8 parts by weight of a third resin; 2-10 parts by weight of a toughening agent; 2-15 parts by weight of a flame retardant; 0.5-2.5 parts by weight of a heat stabilizer; and 0.5-2.5 parts by weight of a light stabilizer.

3. The PC / ABS alloy material according to claim 1, wherein: The ABS is prepared by an emulsion method, an emulsion-blending method, or a bulk method; the molar ratio of the acrylonitrile component, the butadiene component, and the styrene component in the ABS is (10-35):(5-25):(40-85); and the melt index of the ABS at 220° C. and a load of 5 kg is 2-40 g / 10 min.

4. The PC / ABS alloy material according to claim 1, characterized in that: The toughening agent is selected from one or more of ABS high rubber powder, butadiene rubber, styrene-butadiene rubber, pentyl styrene rubber, styrene / butadiene / styrene block copolymer rubber, styrene / isoprene / styrene block copolymer rubber, ethylene / styrene / butadiene / styrene copolymer rubber, ethylene / styrene / isoprene / styrene copolymer rubber and maleic anhydride grafted products of the above substances.

5. The PC / ABS alloy material according to claim 1, characterized in that: The flame retardant is selected from one or more of aliphatic oxyphosphazene, aromatic oxyphosphazene, polyaliphatic siloxane, polyaromatic siloxane, sodium benzenesulfonylbenzenesulfonate, calcium benzenesulfonylbenzenesulfonate, aluminum benzenesulfonylbenzenesulfonate, and zinc benzenesulfonylbenzenesulfonate. The heat stabilizer is selected from one or more of calcium oxide, zinc oxide, calcium carbonate, zinc carbonate, calcium sulfate or zinc sulfate; The light stabilizer is selected from one or more of benzotriazole, pyrogallol, hydroxybenzoate and derivatives thereof.

6. The PC / ABS alloy material according to claim 5, characterized in that: The flame retardant is a combination of aromatic oxyphosphazene, polysiloxane and sodium benzenesulfonylbenzenesulfonate.

7. The PC / ABS alloy material according to claim 5, characterized in that: The flame retardant is a combination of aromatic hydrocarbon oxyphosphazene and polysiloxane.

8. The PC / ABS alloy material according to claim 1, wherein: In the formula (1), n ​​is an integer from 100 to 3000; The molar ratio of formula (1) to formula (2) is 85:15 to 99.5:0.5; X in the formula (1) is one of methylene, cyclohexanediyl or phenylene; Y in the formula (2) is one of methylene, ethylene, hexanediyl, cyclohexanediyl or phenylene; The formula (1) is one of a bisphenol A carbonate segment, a biphenyl carbonate segment or a benzophenone carbonate segment.

9. The PC / ABS alloy material according to claim 8, characterized in that: In the formula (1), n ​​is an integer from 500 to 3000; The molar ratio of formula (1) to formula (2) is 90:10 to 99:1; In the formula (2), Y is a cyclohexylene group or a phenylene group.

10. The method for preparing the PC / ABS alloy material according to any one of claims 1 to 9, characterized in that: (1) A diol represented by formula (3), a tetraol represented by formula (4), a dialkyl carbonate represented by formula (5), a catalyst, and a thermal stabilizer are placed in a stirred reactor, replaced with inert gas multiple times, and stirred at an initial temperature under inert gas protection for a period of time t1; then, a reaction is carried out at a certain reaction temperature and pressure for a period of time t2; the reaction is carried out under inert gas protection, unloading, cooling, and granulation to obtain polycarbonate resin particles PC; In formula (3), R1 to R8 are selected from H, C1 to C 24 Hydrocarbon groups, C1~C 24 Halogenated hydrocarbon or C1~C 24 One of the nitroalkyl groups; X is a single bond, C1~C 24 Alkylidene, C3~C 30 One of a cycloalkylidene group, an oxy group, a sulfenyl group, a sulfinic acid group, a sulfonic acid group or a carbonyl group; In formula (4), Y is C1~C 24 Alkylidene, C3~C 30 Cycloalkylene; In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon groups, C3~C 30 One of the cyclic hydrocarbon groups; (2) PC, ABS, a third resin, a toughening agent, a flame retardant, a heat stabilizer, and a light stabilizer are uniformly mixed in a high-speed mixer, and the obtained stirred mixture is fed into a twin-screw extruder; (3) Set the temperature of each zone of the twin-screw extruder to 200-300°C and the main engine speed to 300-1000 rpm; (4) The PC / ABS alloy material is obtained by melt extrusion, water cooling, air drying, pelletizing, vibration screening, homogenization, and drying.

11. The method for preparing the PC / ABS alloy material according to claim 10, wherein: In formula (5), R and R' are selected from C4 to C 22 Hydrocarbon groups, C5~C 24 One of the cyclic hydrocarbon groups.

12. Use of the PC / ABS alloy material according to any one of claims 1 to 9, wherein the PC / ABS alloy material is prepared by the preparation method according to any one of claims 10 to 11, characterized in that: The PC / ABS alloy material is used in the medical, public health or health fields, and is used to manufacture medical device housings and medical equipment appliances.

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