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

A technology of composite materials and Shuangma resin, which is applied in the field of LCM composite material manufacturing, can solve the problems of equipment energy consumption, shorten the processing cycle of preforms, increase the flow resistance during resin infiltration, and reduce the glass transition temperature of the system, so as to shorten the setting time, prevent powder compaction, and simplify the processing effect

Inactive Publication Date: 2017-09-15
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of the above-mentioned sizing agent is characterized in that the specific preparation steps are as follows:

[0031] (1) Take by weight 20-40 parts of bismaleimide resin, 20-30 parts of epoxy resin, 20-40 parts of allyl-based process modifier, 0-5 parts of Thickener, 5-15 parts of toughening modifier;

[0032] (2) Add the epoxy resin, allyl-based process modifier and toughening modifier weighed in step 1 into a mixer or reaction kettle, heat up to 100-130°C under stirring, keep stirring Until the resin is completely dissolved to form a transparent solution;

[0033] (3) Add bismaleimide resin and thickener to the solution in the above step 2, heat up to 140°C under stirring, heat and stir to dissolve the bismaleimide resin, continue to heat and stir and The degree of prepolymerization of the allyl compound and the double horse monomer is controlled by monitoring the melt viscosity of the equipment, and when the appropriate viscosity is reached, ...

Embodiment 1

[0038] A double-horse resin LCM composite material preform sizing agent, which is composed of 35 parts of bismaleimide resins, 27 parts of epoxy resins, 30 parts of allyl-based process modifiers, 2 parts of thickener, 10 parts of toughening modifier.

[0039] The selected bismaleimide resin of the above-mentioned sizing agent is N,N'-(4,4'-methylene diphenyl) bismaleimide (MDA-BMI). The selected epoxy resin is a combination of bisphenol A type epoxy resin and phenol novolac type epoxy resin with a combined softening point between 50 DEG C and 100 DEG C according to an appropriate ratio. The selected allyl type process modifier is diallyl bisphenol A. The selected thickener is fumed silica. The selected toughening modifier is thermoplastic polyimide (TPI) with high heat resistance.

[0040] As the preparation method of the above-mentioned sizing agent, the concrete preparation steps are as follows:

[0041] (1) Take by weight 35 parts of bismaleimide resins, 27 parts of epo...

Embodiment 2

[0046] The present embodiment is different from Example 1 in that: the selected bismaleimide resin is N, N'-(4-methyl-1,3-phenylene)-bismaleimide ( TDA-BMI). Others are the same as in Example 1.

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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...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L63/00C08L63/04C08L71/10C08K5/13C08K3/36C08K9/04C08K3/34
CPCC08K2201/011C08L79/085C08L2201/08C08L2205/02C08L2205/03C08L2205/035C08L63/00C08L63/04C08L79/08C08L71/00C08K5/13C08K3/36C08K9/04C08K3/346
Inventor 岳伟单瑞俊贾艳荣袁远常金
Owner HENGSHEN
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