Preparation method and uses of radiation modified polyolefinic thermoplastic elastomer blending resin

Abstract

The invention provides a process for preparing irradiation modified olefinic thermoplastic elastomer blend resin and its use, wherein the preparing process carrying out pre-irradiation treatment to the olefinic thermoplastic elastomer blend resin through gamma-rays or electron beams, then subjecting the resin to further cross-linking reaction in molten condition. The obtained resin comprises 50-90% of ethylene-alpha-olefin copolymer, and 10-50% of ethylene-mono-substituted alpha-olefin copolymer.

Description

technical field [0001] The invention relates to a preparation method and application of a polyolefin thermoplastic elastomer blend resin, in particular to a preparation method and application of a radiation-modified polyolefin thermoplastic elastomer blend resin. Background technique [0002] Disposable infusion sets are mainly made of polyvinyl chloride (PVC) materials at present. Especially the parts that are in direct contact with the liquid medicine, such as infusion drip funnels, infusion catheters, etc. The infusion device made of PVC material has the advantages of simple production, low cost, and easy bonding. [0003] Since the 1970s, countries around the world have debated the application of PVC infusion sets. The hotspots of controversy lie in three aspects: plasticizer di-isooctyl phthalate (DEHP) has potential safety hazards to human body, PVC material absorbs certain drugs, and waste PVC affects environmental ecology. Because it is a brittle substance, PVC ne...

AI Technical Summary

Problems solved by technology

At the same time, the adsorption of PVC to certain drugs (such as nitroglycerin, paclitaxel, iodominone, diazepam, etc.) makes hospital management more difficult.

Discarded PVC buried deep or burned at normal temperature (below 600°C) will produce dioxin gas, which seriously pollutes the environment

[0004] Using polyvinyl chloride as a disposable infusion set has the following disadvantages: (1) there is a very small amount of vinyl chloride monomer remaining in the polyvinyl chloride resin, which has been proven to be a carcinogen, which will bring harm to people's health. (2) In order to obtain soft polyvinyl chloride products, plasticizers (various organic ester compounds, such as diisooctyl phthalate) must be used during processing, and after the products are formed, they must be stored and transported. Or the plasticizer added during use will gradually migrate out, and the plasticizer extracted during the infusion will contaminate the liquid medicine, and chemically react with the liquid medicine to generate harmful substances, which will damage the patient's body to a certain extent Health and Healing Effects

(3) In order to prevent thermal decomposition of polyvinyl chloride during processing, a variety of metal or heavy metal ion-containing compounds are usually added as stabilizers to prevent thermal degradation and color changes during and after processing. These metal or heavy metal compounds It is extracted during the infusion process and enters the human body, which is harmful to human health; (4) polyvinyl chloride will decompose and produce trace amounts of hydrogen chloride during processing, which will corrode the processing equipment and pose a threat to the health of operators. Cause environmental pollution; (5) waste polyvinyl chloride treatment can cause serious pollution to the environment; (6) disposable infusion sets produced by polyvinyl chloride cannot be sterilized by gamma-ray or electron beam irradiation methods, because gamma - Rays or electron beams will cause the decomposition of PVC material and can only be sterilized with ethylene oxide

The introduction of functional monomers and electron-donating reagents greatly reduces the safety of modified resins prepared by this method and is not suitable for use as medical materials