Butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation and preparation method of butyl rubber polypropylene thermoplastic elastomer

A thermoplastic elastomer and butyl rubber technology, which is applied in the field of butyl rubber polypropylene thermoplastic elastomer and its preparation, can solve the problems of deterioration of PP mechanical properties, loss of use function, aggravation of aging phenomenon, etc. Safety and effect of improving radiation resistance

Pending Publication Date: 2021-09-24
中广核高新核材科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary medical grade PP has poor irradiation stability. After irradiation disinfection, the mechanical properties of PP deteriorate seriously, the color turns yellow, and as time goes by, the aging phenomenon increases, so that it loses its use function.

Method used

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  • Butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation and preparation method of butyl rubber polypropylene thermoplastic elastomer
  • Butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation and preparation method of butyl rubber polypropylene thermoplastic elastomer
  • Butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation and preparation method of butyl rubber polypropylene thermoplastic elastomer

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Experimental program
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Effect test

Embodiment 1～3

[0031] Embodiments 1-3: butyl rubber polypropylene thermoplastic elastomer material capable of irradiation sterilization and its preparation method

[0032] The preparation method of the butyl rubber polypropylene thermoplastic elastomer material which can be sterilized by radiation specifically comprises the following steps:

Embodiment 1

[0035] The butyl rubber polypropylene thermoplastic elastomer formula that can be sterilized by radiation is composed as follows, and each component is expressed in parts by weight.

[0036]

[0037] Preparation Process:

[0038] (1) Rubber and plastic pre-mixing: mix bromobutyl rubber, radiation-resistant polypropylene resin, medical grade rubber softening oil, styrene thermoplastic elastomer, antioxidant, and other additives according to their respective weight parts Finally, put it into the internal mixer, the temperature of the internal mixer is 165 °C, and internal mixer for 30 minutes, so that the rubber and resin are fully mixed and uniform, and sent into the single-screw extruder for granulation, so as to obtain the pre-mixed intermediate.

[0039] (2) Dynamic vulcanization: put the pre-mixed intermediate, cross-linking agent, and cross-linking auxiliary agent into a twin-screw extruder in a certain proportion for dynamic vulcanization and granulation. The screw spe...

Embodiment 2

[0041] The butyl rubber polypropylene thermoplastic elastomer formula that can be sterilized by radiation is composed as follows, and each component is expressed in parts by weight.

[0042]

[0043] Preparation Process:

[0044](1) Rubber and plastic pre-mixing: mix bromobutyl rubber, radiation-resistant polypropylene resin, medical grade rubber softening oil, styrene thermoplastic elastomer, antioxidant, and other additives according to their respective weight parts Finally, put it into the internal mixer, the temperature of the internal mixer is 165 °C, and internal mixer for 30 minutes, so that the rubber and resin are fully mixed and uniform, and sent into the single-screw extruder for granulation, so as to obtain the pre-mixed intermediate.

[0045] (2) Dynamic vulcanization: put the pre-mixed intermediate, cross-linking agent, and cross-linking auxiliary agent into a twin-screw extruder in a certain proportion for dynamic vulcanization and granulation. The screw spee...

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PUM

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Abstract

The invention discloses a butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation and a preparation method of the butyl rubber polypropylene thermoplastic elastomer. The butyl rubber polypropylene thermoplastic elastomer comprises the following components in parts by mass: 100 parts of brominated butyl rubber, 20-40 parts of irradiation-resistant polypropylene resin, 40-70 parts of medical grade rubber softening oil, 5-20 parts of a styrene thermoplastic elastomer, 0.2-2 parts of a cross-linking agent and a cross-linking auxiliary agent, 0.1-1 part of an antioxidant and 0.1-1 part of a processing auxiliary agent. The butyl rubber polypropylene thermoplastic elastomer capable of being sterilized by irradiation not only has the characteristics of low hardness, excellent elasticity and air tightness, can meet the use requirements of medical rubber plug materials, but also can be sterilized in an irradiation sterilization mode, and after being sterilized by cobalt-60 irradiation, the mechanical property is basically not reduced, and the use requirements of medicine packaging materials can be met. The butyl rubber polypropylene thermoplastic elastomer is applied to the field of medical rubber plugs, the production technological process of the medical rubber plugs can be simplified, the sterilization process of the medical rubber plugs can be shortened, and the efficiency is improved.

Description

technical field [0001] The invention relates to a butyl rubber polypropylene thermoplastic elastomer which can be sterilized by radiation and a preparation method thereof, belonging to the field of polymer material processing. Background technique [0002] Halogenated butyl rubber not only has the advantages of high gas barrier properties, aging resistance, high heat resistance, and high damping properties of butyl rubber, but also has fast vulcanization speed, high vulcanization efficiency, high vulcanization degree, less vulcanizing agent consumption, As well as zinc-free vulcanization and other characteristics, it has become an indispensable material in the field of medical rubber stoppers. However, traditional thermosetting butyl medical rubber stopper products are generally produced by compression molding, and the production process includes ingredients, raw rubber mixing, molding, vulcanization, trimming, washing, drying and other processes. The process is long, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/28C08L23/12C08L53/02
CPCC08L23/283C08L2205/035C08L2207/04C08L2201/08C08L23/12C08L53/025
Inventor 李勃润廖永江徐红岩夏艺伟史猛王小军
Owner 中广核高新核材科技(苏州)有限公司
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