High dielectric constant polypropylene material and method for producing the same

By introducing surface-modified carbon nanotubes and other fillers into polypropylene materials, the problems of high dielectric and mechanical properties of millimeter-wave radar bracket materials have been solved, and the high-frequency dielectric and processing performance have been improved, making it suitable for high-end intelligent vehicle systems.

CN122103744APending Publication Date: 2026-05-29HEFEI GENIUS NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI GENIUS NEW MATERIALS CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing millimeter-wave radar bracket materials are expensive and have poor processing performance, making it difficult to meet the requirements of high dielectric and mechanical properties for high-end intelligent vehicle systems.

Method used

High dielectric constant polypropylene materials are prepared by using copolymer polypropylene as the base material, combined with surface-modified carbon nanotubes, talc, mica, barium sulfate and other components, and through a specific process, thereby optimizing dielectric and mechanical properties.

Benefits of technology

The prepared high dielectric constant polypropylene material exhibits excellent dielectric properties under high frequency conditions, and has good molding and processing performance and low density, making it suitable for preparing dielectric components of various sizes and specifications.

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Patent Text Reader

Abstract

The application discloses a high-dielectric-constant polypropylene material and a preparation method thereof. The material is prepared from the following components in parts by weight: polypropylene 57-77 parts, surface-modified carbon nanotubes 10-15 parts, mineral powder 10-20 parts, a compatilizer 3-8 parts, a processing aid 0.5 part, and an antioxidant 0.5 part. The surface-modified carbon nanotubes are silane coupling agent-modified carbon nanotubes. The high-dielectric-constant polypropylene material prepared by the application has the dielectric properties of the modified polypropylene material effectively improved under high-frequency test conditions, and the mechanical properties of the material ensured, by optimizing the regularity and adding amount of the carbon nanotubes, and by filling the carbon nanotubes with a certain amount of mineral powder and a compatilizer. The high-dielectric-constant polypropylene material prepared by the application also has good forming and processing properties and low density, and can be used to prepare dielectric components of various sizes and specifications through an injection molding process.
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