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Medical radiation-resistant polyvinyl chloride resin

A polyvinyl chloride resin and polyvinyl chloride powder technology, which is applied in the field of medical radiation-resistant polyvinyl chloride resin, can solve the problems of large material damage, high density, and high energy, achieve good mechanical properties, reduce decomposition, and improve The effect of radiation resistance

Inactive Publication Date: 2012-12-19
SHANDONG WEIGAO GROUP MEDICAL POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyvinyl chloride materials added with polyvinyl chloride heat stabilizers, zinc stearate, calcium stearate and epoxidized soybean oil can inhibit the degradation of polyvinyl chloride during processing and use, however, due to radiation The high-energy electron beam in the sterilization process has high energy and high density, and the damage to the material is greater than that suffered during the processing and use process. Therefore, only relying on the above-mentioned additives cannot meet the resistance of the material to the high-energy electron beam, and cannot meet the requirements of the material. Does not degrade or change color during high-energy electron beam irradiation and storage

Method used

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  • Medical radiation-resistant polyvinyl chloride resin
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preparation example Construction

[0025] The preparation method of the medical radiation-resistant polyvinyl chloride material of the present invention comprises the following steps:

[0026] (1) Add the powdery substances in the above raw materials into a hot mixing device with a high-speed agitator with a cold mixing and hot mixing device for mixing, and add other liquid additives for mixing when the temperature reaches 80°C;

[0027] (2) After adding the liquid additive, when the temperature reaches 110°C, put the premix in the hot mixing device into the cold mixing device of the agitator and stir to room temperature to obtain the premix;

[0028](3) Add the premix obtained in step (2) to the screw extruder for melting and plasticization. The temperature of the screw extruder along the direction from the feed port to the die is 110-170°C. The temperature is 160-170°C, and the screw speed is 30-150 rpm.

[0029] (4) The blend is plasticized by a screw, extruded by a die, then subjected to hot cutting, granu...

Embodiment 1

[0030] Example 1: 100 parts of polyvinyl chloride powder, 49 parts of plasticizer diisooctyl phthalate, 1 part of high-efficiency calcium zinc stabilizer, main antioxidant β-(3,5-di-tert-butyl- 0.2 parts of 4-hydroxyphenyl) n-octadecanyl propionate, 0.5 parts of bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite, 3 parts of epoxidized soybean oil 0.1 part of calcium stearate, 0.1 part of zinc stearate, and 0.1 part of medical silicone oil.

Embodiment 2

[0031] Example 2: 100 parts of polyvinyl chloride powder, 55 parts of plasticizer cyclohexane-1,2-diisononyl dicarboxylate, 0.5 parts of high-efficiency calcium zinc stabilizer, main antioxidant β-(3 , 0.2 parts of 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate 0.2 parts, phosphite auxiliary antioxidant bis(2,4-di-tert-butylphenol) pentaerythritol disulfide Phosphate ester 0.05 part, epoxy soybean oil 5 part, calcium stearate 0.15 part, zinc stearate 0.15 part, medical silicone oil 0.05 part.

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Abstract

The invention relates to a medical radiation-resistant polyvinyl chloride resin material which is prepared from the following components in parts by weight: 100 parts of polyvinyl chloride powder, 30-55 parts of plasticizer, 0.5-2 parts of calcium-zinc stabilizer, 0.05-0.2 part of main antioxidant, 0.05-0.6 part of phosphite auxiliary antioxidant, 3-10 parts of epoxy soybean oil, 0.05-0.25 part of calcium stearate, 0.05-0.25 part of zinc stearate and 0.05-0.1 part of lubricant. The polyvinyl chloride material provided by the invention can satisfy the requirements for medical polyvinyl chloride, does not become yellow or degraded after being radiated by a high-energy electron accelerator, and can be used for preparing disposable medical appliances sterilized by radiation of an electron accelerator.

Description

technical field [0001] The invention relates to a medical polymer material, in particular to a medical radiation-resistant polyvinyl chloride resin. Background technique [0002] We know that when medical devices are sterilized by traditional ethylene oxide sterilization methods, it is easy to cause air pollution, and chemicals harmful to human body will remain on medical devices. The use of high-energy electron beams to sterilize medical devices has the advantages of no pollution, no residue, and short cycles. It is suitable for large-scale production, and has the characteristics of energy saving and environmental protection. When irradiating disposable medical devices made of ordinary medical polyvinyl chloride, such as disposable infusion sets and disposable venous blood sample collectors (with needles), the polyvinyl chloride part will degrade , yellowing phenomenon, affecting the use of products, so the current domestic production of ordinary medical polyvinyl chloride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/12C08K5/11C08K5/1515C08K5/098C08K5/134C08K5/18C08K5/524C08K5/526
Inventor 尹立刚殷敬华夏欣瑞石恒冲胡阳蔡诗荣袁志远
Owner SHANDONG WEIGAO GROUP MEDICAL POLYMER
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