A kind of ablation-resistant resin for resin film infiltration process and preparation method thereof

Abstract

The invention discloses an ablation-resistant resin for a resin film infiltration process and a preparation method thereof, aimed at the existing thermosetting resin matrix of the resin film infiltration process with poor process performance, high cost, and heat resistance (such as low carbon residue rate) Insufficiency in being applied to ablation materials, the present invention uses thermoplastic polyurethane and boron phenolic resin to synergistically improve the process performance and heat resistance of thermosetting phenolic resins, and obtain ablation-resistant heat-resistant resin films (sheets) that meet the resin film infiltration process method of preparation. The composite material prepared by using the diaphragm not only has ablation resistance and oxidation resistance, but also takes into account low cost, excellent heat resistance, and good process performance, and can be widely used in the preparation of ablation-resistant heat protection materials, carbon materials and Wear-resistant materials, used in aerospace, electronic technology and other cutting-edge fields.

Description

technical field [0001] The invention relates to a resin and a preparation method thereof, in particular to an ablation-resistant resin for a resin film infiltration process and a preparation method thereof. Background technique [0002] At present, how to use low-cost manufacturing technology to prepare high-performance composite materials is the research focus in the field of international composite materials research. Resin transfer molding (RTM, Resin Transfer Molding) has high efficiency, low investment, good working environment, does not use prepreg, and can largely avoid the use of autoclave molding methods, thereby greatly reducing manufacturing costs. Because the molding process is a closed mold operation, affected by factors such as the type of prefabricated part, the type of resin, the cost of the mold structure, etc., it is difficult to achieve technologically in the preparation of large-scale parts. Resin Film Infiltration (RFI, Resin Film Infusion) is a new met...

AI Technical Summary

Problems solved by technology

Although the obtained resin film can meet the RFI process, the crosslinking density of the phenolic resin is reduced during the preparation process, so that the heat resistance and ablation resistance of the modified resin film cannot meet the requirements of ablation materials.

Gu Aijuan et al. (Patent No.: 200910181349) used hyperbranched polysiloxane to modify bismaleimide resin in order to obtain toughness, heat resistance, resin film with improved dielectric properties, but hyperbranched polymers and bismaleimide The cost of imide resin is relatively high in the actual production process, and its heat resistance and toughness also cannot meet the development requirements of ablation-resistant materials.

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