Carbon fiber reinforced composite materials and methods for manufacturing carbon fiber reinforced composite materials

The carbon fiber reinforced composite material with a tailored polyvinyl acetal resin and epoxy resin formulation addresses adhesion and compatibility issues, resulting in improved mechanical strength and toughness.

TWI934040BActive Publication Date: 2026-08-01SEKISUI CHEMICAL CO LTD
4 Cites 0 Cited by

Patent Information

Application Number
TW111136195
Authority / Receiving Office
TW · TW
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-03-24
Filing Date
2022-09-23
Publication Date
2026-08-01
Estimated Expiration
2042-09-22

AI Technical Summary

Technical Problem

Existing prepregs for carbon fiber reinforced composite materials exhibit insufficient viscosity, surface adhesion, interfacial adhesion, toughness, and mechanical strength due to poor compatibility between reinforcing fibers and matrix resin, leading to reduced performance.

Method used

A carbon fiber reinforced composite material containing carbon fibers, epoxy resin, and a specific polyvinyl acetal resin with alkyl groups and acid-modified groups, optimized for improved adhesion, compatibility, and interfacial bonding, along with a manufacturing method that includes compounding the resin composition with carbon fibers.

Benefits of technology

The composite material achieves enhanced mechanical strength, toughness, and impact resistance with improved adhesion and compatibility, reducing defects and enhancing processability.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

This invention provides a carbon fiber reinforced composite material with excellent adhesion, compatibility with epoxy resin, and interfacial adhesion, and capable of achieving high mechanical strength, as well as a method for manufacturing the carbon fiber reinforced composite material. The carbon fiber reinforced composite material of this invention comprises carbon fibers, epoxy resin, a hardener, and polyvinyl acetal resin, wherein the polyvinyl acetal resin contains a constituent unit as shown in formula (1), where R1 in formula (1) is an alkyl group having one or more carbon atoms; in formula (1), R1 can be the same or different.
Need to check novelty before this filing date? Find Prior Art