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Medical chemical-resistant transparent polycarbonate composition and preparation method thereof

A technology of polycarbonate and chemical resistance, which is applied in the field of medical chemical-resistant transparent polycarbonate composition and its preparation, can solve the problem that the quality management system cannot meet the requirements of medical device risk management, stress relief is not good, and cannot meet the requirements Dimensional requirements and other issues, to achieve the effect of retaining dimensional accuracy, improving dimensional accuracy and chemical resistance, and excellent chemical resistance

Pending Publication Date: 2022-05-17
浙江海圣医疗器械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN111171506A eliminates internal stress by blending polyketone and polycarbonate, but polycarbonate is opaque due to the incompatibility of polyketone and polycarbonate
Chinese patents CN101570627B, CN101906243A, CN112226061A and CN109265953A have reported that polyester polymers (PET, PETG, PCTG) have good compatibility with polycarbonate, and can maintain good transparency after blending, but because their products The application fields are not in the field of medical devices, resulting in the inability to meet the requirements of medical device risk management in terms of raw materials, equipment, processes, quality management systems, etc.
Another method is to heat treat the polycarbonate parts, specifically, place the polycarbonate parts in a higher temperature environment for a period of time and then control them to cool at an appropriate speed, but this method is harmful to the thickness of the product. And the stress relief at the sharp corners is not good, and the usual heat treatment process temperature is high, which will cause the size of the product to change, resulting in the inability to meet the requirements of the field with high size requirements

Method used

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  • Medical chemical-resistant transparent polycarbonate composition and preparation method thereof
  • Medical chemical-resistant transparent polycarbonate composition and preparation method thereof
  • Medical chemical-resistant transparent polycarbonate composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the clean workshop, use a dehumidifier to dry each component separately: polycarbonate is dried at 120°C for 4 hours; PETG is dried at 100°C for 4 hours; styrene-acrylonitrile-glycidyl methacrylate ternary The copolymer was dried at 80°C for 4 hours, and the other components were dried at 80°C for 4 hours. According to the mass ratio, 100 kg of polycarbonate, 10 kg of PETG, and 0.5 kg of styrene-acrylonitrile-glycidyl methacrylate terpolymer were weighed for pre-mixing. A two-stage extruder combined with a parallel twin-screw extruder and a single-screw extruder is used for melt blending, a premix of polycarbonate, PETG, styrene-acrylonitrile-glycidyl methacrylate terpolymer It is added from the main feeding port of the twin-screw extruder, the blending temperature is 220-290° C., pelletized and dried under water to obtain pellets of the polycarbonate composition. The polycarbonate composition pellets are baked and injection molded into semi-finished products by inj...

Embodiment 2

[0029]In the clean workshop, use a dehumidifier to dry each component separately: polycarbonate is dried at 110°C for 4 hours; PETG is dried at 90°C for 4 hours; styrene-acrylonitrile-maleic anhydride terpolymer is dried at Dry at 80°C for 4 hours, and dry the other components at 80°C for 4 hours. According to the mass ratio, 100 kg of polycarbonate, 15 kg of PETG, and 1 kg of styrene-acrylonitrile-maleic anhydride terpolymer were weighed for pre-mixing, and 0.1 kg of antioxidant was weighed for pre-mixing. A two-stage extruder combined with a parallel twin-screw extruder and a single-screw extruder is used for melt blending, and the premixed material of polycarbonate, PETG, and styrene-acrylonitrile-maleic anhydride terpolymer is obtained from the twin-screw extruder. The main feeding port of the extruder and the antioxidant premix are respectively added from the side feeding port of the twin-screw extruder, the blending temperature is 220-290°C, and after underwater pelletiz...

Embodiment 3

[0031] In the clean workshop, use a dehumidifier to dry each component separately: polycarbonate is dried at 120°C for 4 hours; PCTG is dried at 100°C for 4 hours; styrene-acrylonitrile-glycidyl methacrylate ternary The copolymer was dried at 80°C for 4 hours, and the other components were dried at 80°C for 4 hours. According to the mass ratio, 100 kg of polycarbonate, 10 kg of PCTG, and 0.5 kg of styrene-acrylonitrile-glycidyl methacrylate terpolymer were weighed for pre-mixing. The premix of polycarbonate, PCTG, styrene-acrylonitrile-glycidyl methacrylate terpolymer is melt-blended using a two-stage extruder combined with a parallel twin-screw extruder and a single-screw extruder It is added from the main feeding port of the twin-screw extruder, the blending temperature is 220-290° C., pelletized and dried under water to obtain pellets of the polycarbonate composition. The polycarbonate composition pellets are baked and injection molded into semi-finished products by inject...

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Abstract

The invention belongs to the technical field of preparation of medical polymer materials, and particularly relates to a medical chemical-resistant transparent polycarbonate composition and a preparation method thereof. The preparation method of the medical chemical-resistant transparent polycarbonate composition comprises the following steps: (1) pretreatment: drying the polycarbonate, the polyester copolymer, the compatilizer and other auxiliaries; (2) weighing: weighing 100 parts of polycarbonate, 0.1-20 parts of polyester copolymer, 0.1-5 parts of compatilizer and 0-1 part of other auxiliaries to obtain a premix 1 of polycarbonate, polyester copolymer and compatilizer and a premix 2 of other auxiliaries; (3) granulating: 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 carrying out injection molding by an injection molding machine to obtain a semi-finished product; and (5) post-treatment: carrying out soaking and heat treatment on the semi-finished product to obtain a polycarbonate finished product.

Description

technical field [0001] The invention belongs to the technical field of preparation of medical polymer materials, and in particular relates to a medical chemical-resistant transparent polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is an engineering plastic with excellent performance. It has the advantages of high transparency, good dimensional stability, good mechanical properties, and high heat resistance. It is widely used in the manufacture of high-pressure syringes, masks, blood oxygenators, blood collection Medical devices such as devices, blood separation devices, kidney dialysis equipment, Luer connectors and IV connectors. However, polycarbonate has poor chemical resistance and often cannot withstand cleaning agent disinfection, nor can it tolerate solvents in pharmaceuticals, which can easily lead to cracking. Cracking of medical device products can affect the appearance at least, and affect the performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08L25/14C08L35/06
CPCC08L69/00C08L2201/10C08L2205/08C08L67/02C08L25/14C08L35/06
Inventor 聂智军黄海生王利明
Owner 浙江海圣医疗器械股份有限公司
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