PC / ABS alloy material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of high-performance resin materials, in particular to a PC / ABS alloy material and a preparation method and application thereof. Comprising the following components in parts by weight: 50-95 parts of PC; 5 to 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 the following steps: uniformly mixing the PC, the ABS, the third resin, the flexibilizer, the flame retardant, the heat stabilizer and the light stabilizer in a high-speed mixer, and putting the obtained stirred mixture into a double-screw extruder; the temperature of each area of the double-screw extruder is set to be 200-300 DEG C, and the rotating speed of a main machine is set to be 300-1000 revolutions And carrying out melt extrusion, water cooling, air cooling and blow-drying, pelletizing, vibratory screening, homogenizing and drying to obtain the PC / ABS alloy material. The material has excellent chemical and gamma ray radiation resistance and mechanical retention rate, and can be used for manufacturing medical instruments for dialysis, injection, diagnosis and the like.

Description

Technical Field

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

[0002] With the continuous advancement of medical technology and people's growing demand for health, medical-grade plastic materials are increasingly in demand due to their excellent physical and biocompatibility properties, and have been widely used in medical devices, medical equipment, disposable medical supplies, etc. Especially in high-end medical fields such as surgical instruments, medical containers, artificial joints, and dental implants, the application and demand are increasing. Major manufacturers around the world have increased investment and increased production capacity to meet the growing market demand. This field has strong market appeal and development potential.

[0003] Polycarbonate / acrylonitrile-butadiene-styrene terpolymer (PC / ABS) alloy materials have obvious competitive advantages due to their excellent performance and wide applicability, and have become an important material choice in the medical industry. In order to ensure the safety of medical products, in addition to passing the biocompatibility requirements of medical devices, medical-grade alloy materials must also be able to pass sterilization processes such as high-concentration alcohol, iodine, ethylene oxide gas, gamma rays and electron beam radiation without cracking and brittleness, and can still maintain excellent physical property retention. In the medical and medical fields, PC / ABS alloys are mainly used for: 1. Medical device shells: can be used to manufacture shells of various medical devices, such as monitors, infusion pumps and ultrasonic equipment; 2. Disposable medical supplies: can be used to manufacture disposable syringes, catheters and other disposable devices due to their good formability and strength; 3. Laboratory equipment: used in test tubes, culture dishes and other laboratory appliances due to their chemical resistance and transparency; 4. Dental equipment: used for dental instruments and auxiliary equipment to meet high hygiene standards and durability requirements. With the development of medical-grade PC / ABS materials and technologies, its application scope and performance need to be continuously improved to meet the needs 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, which 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 undertakings. 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, so as to solve the problem in the background technology that the PC / ABS alloy is easily subjected to chemical treatment and gamma ray radiation, which may cause the material performance to decline and the life cycle to be shortened.

[0006] To achieve the above object, 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] Furthermore,

[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, 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 groups;

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

[0013] In formula (2), Y is C1 to C 24 Alkylene, 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 another 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] Further, 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, 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.

[0018] Further, 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.

[0019] Or, 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, hydroxybenzoic acid esters and derivatives thereof.

[0022] Furthermore,

[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 methylene, cyclohexylene or phenylene; Y in the formula (2) is one or more of methylene, ethylene, hexylene, cyclohexylene or phenylene, preferably one or more of cyclohexylene or phenylene;

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

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

[0028] (1) putting a diol represented by formula (3), a tetraol represented by formula (4), a dialkyl carbonate represented by formula (5), a catalyst and a heat stabilizer into a stirred reactor, replacing with inert gas for multiple times, stirring for a period of time t1 at an initial temperature under the protection of inert gas; then reacting at a certain reaction temperature and pressure for a period of time t2; filling with inert gas protection, unloading, cooling, and granulating to obtain polycarbonate resin particles PC;

[0029]

[0030] In formula (3),

[0031] R1 to R8 are selected from H, C1 to C 24 Hydrocarbon, 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 groups;

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

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

[0035] In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon, C3~C 30 One or more of the cyclic hydrocarbon groups, preferably C4 to C 22 Hydrocarbon, 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) Setting 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 through melt extrusion, water cooling, air cooling and 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 certain branched structure to the polycarbonate, improves the processing performance of the PC / ABS alloy material, and has a more obvious advantage in manufacturing thin-walled parts, is beneficial to the resistance to organic chemicals and radiation aging of the PC / ABS alloy material, and has achieved good technical effects. The combination of the phosphazene compound and polysiloxane and the combination of the phosphazene compound and polysiloxane and benzenesulfonylbenzenesulfonate imparts excellent fire retardant properties to the PC / ABS alloy material, and is beneficial to the solvent resistance of the alloy material. Micro-nanoscale heat stabilizers and light stabilizers can effectively improve the long-term use stability of the PC / ABS alloy material. 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] 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 under the catalysis of 0.67 g of sodium bicarbonate, replacing with nitrogen three times, stirring at an initial temperature of 175° C. and a speed of 500 rpm for 40 minutes, and then heating at 195° C. and 10 -4 The reaction was carried out for 400 minutes under atm pressure, 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 Co., Ltd.;

[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 TCI Chemicals;

[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] Embodiment 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, 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 groups;

[0061] X is a single bond, C1~C 24 Alkylene, C3~C 30 cycloalkylidene, oxy, thiol, sulfinic acid, sulfonic acid, carbonyl, preferably a single bond, methylene, cyclohexylidene, 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 to C 24 Alkylene, C3~C 30 cycloalkylidene group; preferably methylene, ethylene, hexylene, cyclohexylidene, phenylene, more preferably cyclohexylidene, phenylene; * represents the bond between the structural unit represented by formula (2) and the segment represented by formula (1) or the bond with another structural unit represented by 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); 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 one or more selected from phosphazenes, aliphatic hydrocarbon oxyphosphazenes, aromatic hydrocarbon oxyphosphazenes, polysiloxanes, polyaliphatic hydrocarbon siloxanes, polyaromatic hydrocarbon siloxanes, sodium benzenesulfonylbenzenesulfonate, calcium benzenesulfonylbenzenesulfonate, aluminum benzenesulfonylbenzenesulfonate, and zinc benzenesulfonate, preferably a combination of aromatic hydrocarbon oxyphosphazenes and polysiloxanes, more preferably a combination of aromatic hydrocarbon oxyphosphazenes, polysiloxanes 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, hydroxybenzoic acid esters and derivatives thereof.

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

[0072] 1. Put 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, replace with inert gas for multiple times, stir for a period of time t1 at the initial temperature under the protection of inert gas; then react at a certain reaction temperature and pressure for a period of time t2; fill with inert gas protection, unload, cool, and granulate 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%, preferably 0.001% to 0.025%, of the total molar amount of the formula (3), formula (4) and formula (5);

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

[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, 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 C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon groups;

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

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

[0084] In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon, C3~C 30 One or more of the cyclic hydrocarbon groups, preferably C4 to C 22 Hydrocarbon, 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] Embodiment 2~embodiment 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 are uniformly mixed in a high-speed mixer, and the obtained stirred mixture is put 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 300-1000 rpm; after melt extrusion, water cooling, air cooling and drying, pelletizing, vibration screening, homogenization and drying, a PC / ABS alloy material is obtained.

[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 300-1000 rpm; and a 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 performed 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 at 50% humidity and 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 50 kGy gamma rays for 24 hours, and then the notched impact strength and flexural modulus were tested.

[0100] The tested performance is shown in Table 1.

[0101] Table 1 Properties of 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 and 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 agent and gamma ray treatment are much higher than the latter, showing the technical advantages of the present invention.

[0105] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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: 50-95 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.

2. The PC / ABS alloy material according to claim 1, characterized in that: 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, 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 C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon groups; X is a single bond, C1~C 24 Alkylene, C3~C 30 One of cycloalkylidene, oxy, thiol, sulfinic acid, sulfonic acid or carbonyl groups; n is an integer of 10 to 5000; In formula (2), Y is C1 to C 24 Alkylene, 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 another structural unit represented by formula (2).

3. 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.

4. The PC / ABS alloy material according to claim 1, characterized in that: 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); the melt index of the ABS at 220° C. and a load of 5 kg is 2-40 g / 10 min.

5. The PC / ABS alloy material according to claim 1, characterized in that: 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.

6. 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.

7. The PC / ABS alloy material according to claim 1, characterized in that: 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. Or, the flame retardant is a combination of aromatic oxyphosphazene and polysiloxane, preferably a combination of aromatic oxyphosphazene, polysiloxane and sodium 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, hydroxybenzoic acid esters and derivatives thereof.

8. The PC / ABS alloy material according to claim 2, characterized in that: In the formula (1), n ​​is an integer of 100 to 3000, preferably an integer of 500 to 3000; The molar ratio of formula (1) to formula (2) is 85:15 to 99.5:0.5, preferably 90:10 to 99:1; X in the formula (1) is one or more of methylene, cyclohexylene or phenylene; Y in the formula (2) is one or more of methylene, ethylene, hexylene, cyclohexylene or phenylene, preferably one or more of cyclohexylene or phenylene; The formula (1) is one or more of bisphenol A carbonate chain segments, biphenyl carbonate chain segments or benzophenone carbonate chain segments.

9. The method for preparing the PC / ABS alloy material according to any one of claims 1 to 8, characterized in that: (1) putting a diol represented by formula (3), a tetraol represented by formula (4), a dialkyl carbonate represented by formula (5), a catalyst and a heat stabilizer into a stirred reactor, replacing with inert gas for multiple times, stirring for a period of time t1 at an initial temperature under the protection of inert gas; then reacting at a certain reaction temperature and pressure for a period of time t2; filling with inert gas protection, unloading, cooling, and granulating to obtain polycarbonate resin particles PC; In formula (3), R1 to R8 are selected from H, C1 to C 24 Hydrocarbon, 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 C3 to C 30 Cyclic hydrocarbon groups, C3~C 30 Halogenated cyclic hydrocarbon group, C3~C 30 Nitrocyclic hydrocarbon groups; X is a single bond, C1~C 24 Alkylene, C3~C 30 One of a cycloalkylidene group, an oxy group, a sulfide group, a sulfinic acid group, a sulfonic acid group or a carbonyl group; In formula (4), Y is C1 to C 24 Alkylene, C3~C 30 Cycloalkylene; In formula (5), R and R' are selected from C1 to C 24 Hydrocarbon, C3~C 30 One or more of the cyclic hydrocarbon groups, preferably C4 to C 22 Hydrocarbon, C5~C 24 One or more 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) Setting 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 cooling and drying, pelletizing, vibration screening, homogenization and drying.

10. An application of the PC / ABS alloy material according to any one of claims 1 to 8, wherein the PC / ABS alloy material The method according to claim 9, 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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