CN114507435A - Medical chemical-resistant transparent polycarbonate composition and preparation method thereof - Google Patents
Medical chemical-resistant transparent polycarbonate composition and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention belongs to the technical field of preparation of medical high polymer materials, and particularly relates to a medical chemical-resistant transparent polycarbonate composition and a preparation method thereof. A preparation method of a medical chemical-resistant transparent polycarbonate composition comprises the following steps: (1) pretreatment: drying the polycarbonate, the polyester copolymer, the compatilizer and other auxiliary agents; (2) weighing: taking 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other additives to obtain a premix 1 of the polycarbonate, the polyester copolymer and the compatilizer and a premix 2 of the other additives; (3) and (3) granulation: adding the premix 1 from a main feeding port of an extruder, adding the premix 2 from a side feeding port of the extruder, and extruding, granulating and drying to obtain polycarbonate composition granules; (4) molding: baking the polycarbonate composition granules and performing injection molding by using an injection molding machine to obtain a semi-finished product; (5) and (3) post-treatment: and soaking and heat treating the semi-finished product to obtain a finished product of polycarbonate.
Description
Technical Field
The invention belongs to the technical field of preparation of medical high polymer materials, and particularly relates to a medical chemical-resistant transparent polycarbonate composition and a preparation method thereof.
Background
Polycarbonate (PC) is an engineering plastic with excellent performance, has the advantages of high transparency, good dimensional stability, good mechanical property, high heat resistance and the like, and is widely applied to manufacturing medical instruments such as high-pressure syringes, masks, blood oximeters, blood collectors, blood separation devices, kidney dialysis equipment, luer connectors, venous transfusion connectors and the like. However, polycarbonates have poor chemical resistance, often cannot withstand sterilization with detergents, and cannot withstand solvents in pharmaceuticals, easily resulting in cracking. Medical instrument products crack, and the appearance is influenced if the medical instrument products crack, and the usability is influenced if the medical instrument products crack, even safety risks are caused, and medical safety accidents are caused.
The analysis of the poor chemical resistance of polycarbonate is mainly caused by the large internal stress of polycarbonate. Therefore, elimination of internal stresses in polycarbonate articles is key to increasing the chemical resistance of polycarbonate. At present, there are two main methods for eliminating the internal stress of polycarbonate. One approach is to modify the polycarbonate by copolymerization or blending, usually by incorporating relatively flexible segments or molecular chains into the polycarbonate. Chinese patent CN111171506A eliminates internal stress by blending polyketone with polycarbonate, but polycarbonate is opaque due to incompatibility of polyketone and polycarbonate. Chinese patents CN101570627B, CN101906243A, CN112226061A and CN109265953A report that polyester polymers (PET, PETG and PCTG) have good compatibility with polycarbonate and can keep good transparency after blending, but because the application field of the products is not the field of medical instruments, the requirements of risk management of the medical instruments cannot be met in the aspects of raw materials, equipment, processes, quality management systems and the like. The other method is to carry out heat treatment on the polycarbonate workpiece, in particular to the polycarbonate workpiece which is placed in a higher temperature environment for treatment for a period of time and then is controlled to be cooled at a proper speed, but the method is not good for eliminating the stress at the junction of the thickness and the sharp corner of the product, and the common heat treatment process has higher temperature, so that the size of the product is changed, and the requirement of the field with higher size requirement cannot be met.
Based on the technical problems in the above production methods, it is desirable to provide a medical chemical resistant transparent polycarbonate composition and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a medical chemical-resistant transparent polycarbonate composition and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a medical chemical-resistant transparent polycarbonate composition comprises the following components in percentage by mass: 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other auxiliary agents; the other auxiliary agents are one or more of an antioxidant, a chain extender, toner and a lubricant.
A preparation method of a medical chemical-resistant transparent polycarbonate composition comprises the following steps:
(1) pretreatment: the components such as polycarbonate, polyester copolymer, compatilizer and other auxiliary agents are dried in advance; the other auxiliary agents are one or more of an antioxidant, a chain extender, toner and a lubricant;
(2) weighing: according to the mass ratio, 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other additives are taken, the polycarbonate, the polyester copolymer and the compatilizer are mixed in a high-speed mixer for 5-15 min to obtain premix 1, and the other additives are mixed in a kneader for 5-15 min to obtain premix 2;
(3) and (3) granulation: adding the premix 1 from a main feeding port of an extruder, adding the premix 2 from a side feeding port of the extruder, extruding, granulating and drying to obtain polycarbonate composition granules;
(4) molding: baking the polycarbonate composition granules and performing injection molding by using an injection molding machine to obtain a semi-finished product;
(5) and (3) post-treatment: soaking and heat treating the semi-finished product to obtain a polycarbonate finished product; soaking the semi-finished product in a soaking solution at constant temperature, wherein the soaking solution is an alcohol acid mixed aqueous solution, the alcohol is ethanol with the content of 0.1-5 wt%, and the acid is acetic acid with the content of 0.1-5 wt%; the soaking temperature is 25-60 ℃, and the soaking time is 0.1-1 h; and carrying out heat treatment on the semi-finished product after constant-temperature soaking in a drying oven, wherein the heat treatment temperature of the drying oven is 75-100 ℃, and the heat treatment time of the drying oven is 0.5-2 h.
Preferably, the polycarbonate is bisphenol A polycarbonate, the melt index is 1-50g/10min, and the biocompatibility meets the GB/T16886 requirement.
Preferably, a double-stage extrusion unit combining a parallel double-screw extruder and a single-screw extruder is adopted during extrusion, the double-screw extruder is provided with a main feeding port and a side feeding port, and the granulation temperature is 220-290 ℃.
Preferably, the compatilizer is one or more of styrene-acrylonitrile-glycidyl methacrylate terpolymer and styrene-acrylonitrile-maleic anhydride terpolymer, and the biocompatibility meets the GB/T16886 requirement.
Preferably, the pellets are underwater pellets.
Preferably, the polyester copolymer is one or more of terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer and cyclohexanedimethanol-terephthalic acid-isophthalic acid terpolymer, and the glass transition temperature of the polyester copolymer is 70-120 ℃; the cyclohexanedimethanol in the terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer accounts for less than 50% of the total alcohol content and is expressed as PETG; the cyclohexanedimethanol in the terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer accounts for more than 50% of the total alcohol content, and is expressed as PCTG, the cyclohexanedimethanol-terephthalic acid-isophthalic acid terpolymer is expressed as PCTA, and the biocompatibility meets the GB/T16886 requirement.
The principle of the invention is as follows: the transparency and the dimensional stability of the carbonic acid polyester can be well maintained through the good compatibility of the polyester copolymer and the polyester carbonic acid; meanwhile, the polyester copolymer has low crystallinity and high glass transition temperature, and is not easy to form crystals in the subsequent heat treatment process, so that the transparency and the dimensional stability of the polycarbonate are not influenced. By means of the compatibilizer, the compatibility of the polyester copolymer and the polycarbonate is further improved, the domain size of the polyester copolymer is reduced, and the influence of the polyester copolymer on the transparency and the dimensional stability of the polycarbonate is further reduced. In the post-treatment process of the invention, the heat treatment of the drying oven can further eliminate the internal stress of the workpiece on one hand and can remove the soaking liquid residue on the surface of the soaked workpiece on the other hand. In addition, through soaking treatment, the temperature of the drying oven in the heat treatment process can be properly reduced, the treatment time can be properly shortened, and the influence on the transparency and the dimensional accuracy of the workpiece can be reduced due to the lower heat treatment temperature.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the preparation method of the medical chemical-resistant transparent polycarbonate composition, provided by the invention, the internal stress of polycarbonate is eliminated through two aspects of material formula and heat treatment process, so that the material has excellent chemical resistance on the basis of keeping high transparency and high dimensional accuracy of the polycarbonate;
(2) according to the preparation method of the medical chemical-resistant transparent polycarbonate composition, the polyester copolymer with higher glass transition temperature and the polycarbonate are blended for modification, so that on one hand, the polyester copolymer and the polycarbonate have better compatibility and can well keep the transparency of the material, on the other hand, the glass transition temperature is higher, so that the glass transition temperature is close to the glass transition temperature of the polycarbonate, the dimensional accuracy of the material can be well kept, and the heat treatment of a workpiece is not influenced;
(3) according to the preparation method of the medical chemical-resistant transparent polycarbonate composition, the heat treatment process comprises soaking heat treatment and drying oven heat treatment, and compared with the traditional pure drying oven heat treatment, the transparency, the dimensional accuracy and the chemical resistance of the polycarbonate are obviously improved;
(4) the preparation method of the medical chemical-resistant transparent polycarbonate composition provided by the invention analyzes and controls potential risks from various aspects such as raw materials, production equipment, production process, quality system and the like, and meets the requirements of medical appliances on safety and effectiveness.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 120 ℃ for 4 hours; PETG is dried for 4 hours at the temperature of 100 ℃; the styrene-acrylonitrile-glycidyl methacrylate terpolymer is dried for 4 hours at the temperature of 80 ℃, and other components are dried for 4 hours at the temperature of 80 ℃. 100kg of polycarbonate, 10kg of PETG and 0.5kg of styrene-acrylonitrile-glycidyl methacrylate terpolymer are weighed according to the mass ratio and premixed. Adopting a double-stage extruder unit combined by a parallel double-screw extruder and a single-screw extruder to melt and blend, adding a premix of polycarbonate, PETG and styrene-acrylonitrile-glycidyl methacrylate terpolymer from a main feeding port of the double-screw extruder, wherein the blending temperature is 220-290 ℃, and carrying out underwater pelletizing and drying to obtain the polycarbonate composition granules. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 50 ℃ for 0.25h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 1:1:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at the temperature of 90 ℃ for 1h to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Example 2
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 110 ℃ for 4 hours; PETG is dried for 4 hours at the temperature of 90 ℃; the styrene-acrylonitrile-maleic anhydride terpolymer was dried at 80 ℃ for 4 hours, and the other components were dried at 80 ℃ for 4 hours. 100kg of polycarbonate, 15kg of PETG and 1kg of styrene-acrylonitrile-maleic anhydride terpolymer are weighed according to the mass ratio and premixed, and 0.1kg of antioxidant is weighed and premixed. Adopting a double-stage extrusion unit combined by a parallel double-screw extruder and a single-screw extruder to carry out melt blending, respectively adding a premix of polycarbonate, PETG and styrene-acrylonitrile-maleic anhydride terpolymer from a main feeding port of the double-screw extruder and an antioxidant premix from a side feeding port of the double-screw extruder, carrying out underwater pelletizing and drying at the blending temperature of 220-. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 60 ℃ for 0.5h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 0.5:1.5:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at the temperature of 80 ℃ for 1.5 hours to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Example 3
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 120 ℃ for 4 hours; PCTG was dried at 100 ℃ for 4 hours; the styrene-acrylonitrile-glycidyl methacrylate terpolymer is dried for 4 hours at the temperature of 80 ℃, and other components are dried for 4 hours at the temperature of 80 ℃. 100kg of polycarbonate, 10kg of PCTG and 0.5kg of styrene-acrylonitrile-glycidyl methacrylate terpolymer are weighed according to the mass ratio and premixed. Adopting a double-stage extruder unit combined by a parallel double-screw extruder and a single-screw extruder to melt and blend, adding a premix of polycarbonate, PCTG and styrene-acrylonitrile-glycidyl methacrylate terpolymer from a main feeding port of the double-screw extruder, wherein the blending temperature is 220-290 ℃, and carrying out underwater pelletizing and drying to obtain polycarbonate composition granules. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 50 ℃ for 0.5h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 1:0.5:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at 100 ℃ for 1h to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Example 4
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 110 ℃ for 4 hours; PETG is dried for 4 hours at the temperature of 90 ℃; PCTG was dried at 100 ℃ for 4 hours; the styrene-acrylonitrile-maleic anhydride terpolymer was dried at 80 ℃ for 4 hours, and the other components were dried at 80 ℃ for 4 hours. 100kg of polycarbonate, 5kg of PETG, 10kg of PCTG and 0.5kg of styrene-acrylonitrile-maleic anhydride terpolymer are weighed according to the mass ratio and premixed, and 0.1kg of toner is weighed and premixed. The polycarbonate composition granules are obtained by adopting a double-stage extruder unit formed by combining a parallel double-screw extruder and a single-screw extruder to melt and blend, respectively adding premixes of polycarbonate, PETG, PCTG and styrene-acrylonitrile-maleic anhydride terpolymer from a main feeding port of the double-screw extruder and toner premixes from a side feeding port of the double-screw extruder, wherein the blending temperature is 220 plus one of 290 ℃, and carrying out underwater granulation and drying. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 50 ℃ for 0.5h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 2:1:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at the temperature of 90 ℃ for 1 hour to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Example 5
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 120 ℃ for 4 hours; drying PCTA at 100 deg.C for 4 hr; the styrene-acrylonitrile-glycidyl methacrylate terpolymer is dried for 4 hours at the temperature of 80 ℃, and other components are dried for 4 hours at the temperature of 80 ℃. 100kg of polycarbonate, 10kg of PCTA and 0.5kg of styrene-acrylonitrile-glycidyl methacrylate terpolymer are weighed according to the mass ratio and premixed. Adopting a double-stage extruder unit combined by a parallel double-screw extruder and a single-screw extruder to melt and blend, adding a premix of polycarbonate, PCTA and styrene-acrylonitrile-glycidyl methacrylate terpolymer from a main feeding port of the double-screw extruder, wherein the blending temperature is 220-290 ℃, and carrying out underwater pelletizing and drying to obtain the polycarbonate composition granules. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 60 ℃ for 0.25h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 1:1:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at 100 ℃ for 1h to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Example 6
In a clean workshop, a dehumidifying dryer is adopted to respectively dry the components: drying the polycarbonate at 110 ℃ for 4 hours; PCTA was dried at 90 ℃ for 4 hours; the styrene-acrylonitrile-maleic anhydride terpolymer was dried at 80 ℃ for 4 hours, and the other components were dried at 80 ℃ for 4 hours. 100kg of polycarbonate, 15kg of PCTA and 0.25kg of styrene-acrylonitrile-maleic anhydride terpolymer are weighed according to the mass ratio and premixed, and 0.05kg of antioxidant, 0.02kg of toner and 0.05kg of lubricant are weighed and premixed. The polycarbonate composition granules are obtained by adopting a double-stage extruder unit formed by combining a parallel double-screw extruder and a single-screw extruder for melt blending, respectively adding a premix of polycarbonate, PCTA and styrene-acrylonitrile-maleic anhydride terpolymer from a main feeding port of the double-screw extruder and an auxiliary agent premix from a side feeding port of the double-screw extruder, wherein the blending temperature is 220-290 ℃, and carrying out underwater granulation and drying. The polycarbonate composition granules are baked and injection molded into a semi-finished product by an injection molding machine, the mold temperature is controlled to be 50-100 ℃, the machine barrel temperature is 220-300 ℃, the injection speed is 30-100mm/s, and the injection pressure is 30-100 bar. Soaking the semi-finished product of the workpiece in a mixed aqueous solution of ethanol and acetic acid at a constant temperature of 60 ℃ for 0.5h, wherein the weight ratio of ethanol: acetic acid: the mass ratio of water is 1:1:100, and the soaked semi-finished product is further subjected to constant-temperature heat treatment in a drying oven at the temperature of 90 ℃ for 1h to obtain a polycarbonate product. The transparency test, the internal stress test, the dimensional accuracy and the biocompatibility evaluation test show that the obtained medical chemical-resistant transparent polycarbonate composition and the product can meet the requirements of medical instruments on transparency, chemical resistance and dimensional accuracy.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
TABLE 1 transparency test
TABLE 2 dimensional testing
TABLE 3 internal stress test
TABLE 4 biocompatibility evaluation test
Claims (7)
1. The medical chemical-resistant transparent polycarbonate composition is characterized by comprising the following components in percentage by mass: 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other auxiliary agents; the other auxiliary agents are one or more of an antioxidant, a chain extender, toner and a lubricant.
2. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 1, comprising the steps of:
(1) pretreatment: drying the polycarbonate, the polyester copolymer, the compatilizer and other auxiliary agents in advance; the other auxiliary agents are one or more of an antioxidant, a chain extender, toner and a lubricant;
(2) weighing: according to the mass ratio, 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other additives are taken, the polycarbonate, the polyester copolymer and the compatilizer are mixed in a high-speed mixer for 5-15 min to obtain premix 1, and the other additives are mixed in a kneader for 5-15 min to obtain premix 2;
(3) and (3) granulation: adding the premix 1 from a main feeding port of an extruder, adding the premix 2 from a side feeding port of the extruder, extruding, granulating and drying to obtain polycarbonate composition granules;
(4) molding: baking the polycarbonate composition granules and performing injection molding by using an injection molding machine to obtain a semi-finished product;
(5) and (3) post-treatment: soaking and heat treating the semi-finished product to obtain a polycarbonate finished product; soaking the semi-finished product in a soaking solution at constant temperature, wherein the soaking solution is an alcohol-acid mixed aqueous solution, the alcohol is ethanol, the content of the ethanol is 0.1-5 wt%, the acid is acetic acid, and the content of the acetic acid is 0.1-5 wt%; the soaking temperature is 25-60 ℃, and the soaking time is 0.1-1 h; and carrying out heat treatment on the semi-finished product after constant-temperature soaking in a drying oven, wherein the heat treatment temperature of the drying oven is 75-100 ℃, and the heat treatment time of the drying oven is 0.5-2 h.
3. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 2, wherein: the polycarbonate is bisphenol A polycarbonate, and the melt index is 1-50g/10 min.
4. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 2, wherein: during extrusion, a double-stage extrusion unit combining a parallel double-screw extruder and a single-screw extruder is adopted, the double-screw extruder is provided with a main feeding port and a side feeding port, and the granulation temperature is 220-290 ℃.
5. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 2, wherein: the compatilizer is one or more of styrene-acrylonitrile-glycidyl methacrylate terpolymer and styrene-acrylonitrile-maleic anhydride terpolymer.
6. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 2, wherein: the pelletizing is underwater pelletizing.
7. The method for preparing a medical chemical-resistant transparent polycarbonate composition according to claim 2, wherein: the polyester copolymer is one or more of terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer and cyclohexanedimethanol-terephthalic acid-isophthalic acid terpolymer, and the glass transition temperature of the polyester copolymer is 70-120 ℃; the cyclohexanedimethanol in the terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer accounts for less than 50% of the total alcohol content and is expressed as PETG; the cyclohexanedimethanol in the terephthalic acid-ethylene glycol-cyclohexanedimethanol terpolymer accounts for more than 50% of the total alcohol content and is expressed as PCTG, and the cyclohexanedimethanol-terephthalic acid-isophthalic acid terpolymer is expressed as PCTA.
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| CN107501887A (en) * | 2017-08-16 | 2017-12-22 | 江苏金发科技新材料有限公司 | High performance polycarbonate composition of the compatilizers of SAG containing special construction and preparation method thereof |
| CN110802793A (en) * | 2018-08-06 | 2020-02-18 | 无锡小天鹅电器有限公司 | Method for producing polycarbonate member and polycarbonate member |
| CN110885468A (en) * | 2019-11-25 | 2020-03-17 | 万华化学（宁波）有限公司 | Method for reducing internal stress of polycarbonate and modified product thereof |
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