Bismaleimide resin LCM (Liquid Composite Molding) composite material preform setting agent and preparation method thereof

Abstract

The invention relates to a bismaleimide resin LCM (Liquid Composite Molding) composite material preform setting agent and a preparation method thereof. The setting agent is prepared from a bismaleimide resin, an epoxy resin, an allyl process modifier, a thickening agent and a toughening modifier. The setting agent disclosed by the invention is simple in preparation process, the reaction conditions are mild and controllable, and the production cost of the setting agent powder is reduced. The setting agent is low in setting temperature and low in time, the equipment energy consumption is reduced, the processing cycle of the preform is shortened, and the manufacturing cost of a large preform part of a complicated structure is effectively reduced. Meanwhile, a high-temperature-resistant flexibilizer and an inorganic particle thickening agent contained in the system can achieve the effects of improving Tg, preventing the setting agent from being hardened in the storage process and improving the scouring resistance of the setting agent, the setting agent is guaranteed, the effective usage amount is reduced to be 3-5% of the density of a fabric surface, the permeability of the preform is improved, flow resistance of the resin during infiltration is reduced, and the problem that the glass transition temperature of the system is reduced due to excessive setting agent is solved.

Description

technical field [0001] The invention belongs to the technical field of LCM composite material manufacturing, and relates to a Shuangma resin LCM composite material preform sizing agent and a preparation method thereof. Background technique [0002] Composite liquid molding technology (LCM) technology is a kind of high-performance and low-cost manufacturing technology developed rapidly after the 1980s. It has gradually become the mainstream of modern composite material science and engineering development, and has formed RTM, A series of high-performance and low-cost advanced composite material manufacturing technologies including VARI and RFI processes. [0003] As a type of advanced composite material matrix, BMI resin stands out from the competition with similar resins by virtue of its advantages of high temperature resistance, radiation resistance, heat resistance and low moisture absorption rate, and is widely used in high-tech fields such as aviation and aerospace. In p...

AI Technical Summary

Problems solved by technology

[0009] The object of the invention is: to propose a Shuangma resin LCM composite material preform sizing agent and its preparation method, to improve the sizing agent production process, reduce production costs; reduce sizing agent sizing temperature and shorten sizing time, reduce equipment energy consumption And shorten the preform processing cycle, reduce the manufacturing cost of large-scale preforms with complex structures; and solve the problem that the existing sizing agent is used in a large amount, and the sizing agent occupies the pores inside the fiber preform, reducing the permeability of the preform and increasing It reduces the flow resistance when the resin is infiltrated, and too much sizing agent leads to a decrease in the glass transition temperature of the system, etc.