Continuous fiber reinforced thermosetting flame-retardant prepreg and preparation method thereof

Abstract

The invention discloses a continuous fiber reinforced thermosetting flame-retardant prepreg and a preparation method thereof. The continuous fiber reinforced thermosetting flame-retardant prepreg comprises a prepreg resin and a continuous fiber fabric, and is prepared by an environment-friendly hot melting process, wherein the content of the prepreg resin in the flame-retardant prepreg is 38-45%, the prepreg resin is prepared from the following raw materials: an epoxy resin, a flame retardant, an auxiliary additive, a leveling additive, a coloring agent, a curing agent and an accelerant, the accelerant comprise a first accelerant and a second accelerant, the first accelerant is one or more of organic urea, thiourea or imidazole compounds, the second accelerant is complexed aromatic diamine, and the flame-retardant prepreg can realize a rapid hot-in and hot-out process at a high temperature of 140-160 DEG C, does not influence the mechanical properties of the molded material, can be rapidly cured and molded for 3-6 minutes, has excellent flame retardant property, can achieve the UL94V0 flame retardant level, and further can achieve spraying-free so as to eliminate the traditional grinding and spraying technological process.

Description

technical field [0001] The invention relates to a continuous fiber-reinforced thermosetting flame-retardant prepreg and a preparation method thereof, belonging to the technical fields of molding technology and flame-retardant composite materials. Background technique [0002] With the national banner of "energy conservation and emission reduction", various industries are responding to relevant calls. For example, the rail transit industry, in the process of ensuring the breakthrough of high-speed railway operation speed, realizes The weight of the whole vehicle is reduced, thereby completing the improvement of speed. Similarly, in the field of automobiles, especially in the field of new energy vehicles, the endurance of power battery packs has always been the focus of concern from all walks of life. Relevant downstream industries use different methods to improve endurance. The weight of the whole vehicle is reduced to achieve the improvement of battery life. At present, mo...

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Problems solved by technology

At present, most of the interior decorations in the car have achieved light weight, and at the same time, the technology also meets the rapid and continuous production of the automobile industry. However, efforts are still being made to achieve light weight of the load-bearing and secondary load-bearing parts of the car, such as , using lighter alloys, using chopped fiber or long fiber reinforced thermoplastic composites, and continuous fiber reinforced resin matrix composites, etc., and continuous fiber reinforced resin matrix composites have been considered to achieve the bearing and secondary The main way to reduce the weight of load-bearing parts, but efficient continuous production and the flammability of composite materials have hindered the realization of this process

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