Boiling-resistant modified polypropylene material and preparation method thereof

By combining low melt index and ultra-high melt index polypropylene materials to form a release film, the problems of bubbling, discoloration and peeling of polypropylene materials under high temperature boiling are solved, achieving high-efficiency paint adhesion and low-cost industrial production.

CN121758867APending Publication Date: 2026-03-31SHANGHAI JUNER NEW MATERIALS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-10
Publication Date
2026-03-31

AI Technical Summary

Technical Problem

Existing polypropylene materials are prone to blistering, discoloration, and peeling under high-temperature boiling conditions, and existing technologies are either too expensive or cannot meet the requirements of industrial production.

Method used

Modified polypropylene materials are prepared by using a combination of low melt flow index polypropylene, ultra-high melt flow index polypropylene, talc, toughening agent, compatibilizer and antioxidant through a twin-screw extruder to form a release film to protect the substrate and improve paint adhesion.

Benefits of technology

Under conditions of boiling in water at 99℃ for 4 hours, the modified polypropylene material does not bubble or change color on the surface, has strong bonding force, meets the standards of OEMs, and is low in cost and easy to industrialize.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a boiling-resistant modified polypropylene material and a preparation method thereof. The boiling-resistant modified polypropylene material is prepared from the following raw materials in parts by mass: 50-70 parts of low-melt-index polypropylene, 2-10 parts of ultrahigh-melt-index polypropylene, 20-30 parts of talcum powder, 3-15 parts of a toughening agent, 1-5 parts of a compatilizer, 0.2-1 part of an antioxidant and 0.3-2 parts of carbon black. The low-melt-index polypropylene is co-polypropylene with the melt index of 10-50g / 10min at 230 DEG C / 2.16 kg; the ultrahigh melt index polypropylene is homo-polypropylene of which the melt index is 1200-1800g / 10min at 230 DEG C / 2.16 kg. The boiling-resistant modified polypropylene material disclosed by the invention has better high-temperature boiling resistance and can meet the experimental requirement of boiling for 4 hours at 99 DEG C, the foaming grade can reach 0-1 grade, and the color difference value change is less than 1.
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Citation Information

Patent Citations

  • High-temperature-boiling-resistant polypropylene composite material and preparation method thereof

    CN112778629A

  • High-temperature-boiling-resistant polypropylene composition as well as preparation method and application thereof

    CN114835974A

  • Polypropylene composite material as well as preparation method and application thereof

    CN120441962A