Supercritical epoxy prepreg foamed sheet and preparation method thereof

• Main Authors: ZHOU GUANGYUAN, CHEN CUNYOU, NIE HERAN
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2022
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention provides an epoxy prepreg foamed sheet. The foaming ratio of the foamed sheet is 5-15 times; the foam hole diameter of the foamed sheet material is 100 to 300 microns; the foamed board is obtained by foaming epoxy resin prepreg; the foamed sheet contains reinforced fibers. The epoxy resin prepreg foamed board with the specific structure is a structural core material with excellent performance, has higher high-temperature resistance, can be equivalent to PMI (polymethacrylimide), and has excellent mechanical performance. The compression performance at normal temperature and high temperature can be superior to that of PMI, and the use requirement of a high-temperature bearing structural core material can be met. In addition, the preparation method provided by the invention only adopts the general epoxy resin prepreg in the market as the raw material, the raw material is easy to obtain, the process is simple, the reaction time is short, the control is easy, the production efficiency is high, the fo