制备乙烯-醋酸乙烯酯共聚物的方法、乙烯-醋酸乙烯酯共聚物及其应用
By controlling the conditions in a batch reactor and a twin-screw extruder to prepare ethylene-vinyl acetate copolymer, the problem of harmful substances in PVC materials is solved, providing an environmentally friendly medical material with excellent mechanical properties and high transparency, suitable for intravenous nutrition bags.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2022-08-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing medical plastics such as PVC contain harmful substances that damage human health, and there are pollution problems during the use of intravenous nutrition infusion bags. There is a need to develop an environmentally friendly medical material with excellent mechanical properties and high transparency.
In the presence of organic peroxides, ethylene and vinyl acetate are polymerized in a batch reactor, and then melt-blended and granulated with an antioxidant in a twin-screw extruder to prepare an ethylene-vinyl acetate copolymer. By controlling the temperature and pressure conditions of polymerization and melt blending, a copolymer that meets USP VI certification is obtained.
The prepared ethylene-vinyl acetate copolymer has excellent mechanical properties and high transparency, meeting the bioperformance requirements of medical materials. It is suitable for intravenous nutrition bags, ensuring the safety and stability of the product.
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