High-strength hard flame-retardant epoxy foam material and preparation method thereof
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An epoxy foam, high-strength technology, applied in the field of aerospace manufacturing, can solve problems such as uneven bubble structure and complex process, and achieve the effects of improving stiffness, simple process flow and high production efficiency
Inactive Publication Date: 2017-08-01
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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[0004] Chinese patent ZL200810040845.8, Japanese patent Showa 45-16588 and U.S. patent 4410639 have invented a variety of molding methods for epoxy foam materials with different densities, but these methods are mainly based on the principle of chemical foaming, and the process is complicated and requires strict procedures. Control, otherwise it is easy to cause problems such as uneven bubble structure
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Embodiment 1
[0026] The preparation method of the high-strength rigid flame-retardant epoxy foam material of the present embodiment is as follows:
[0027] (1) Prepare materials according to the following components and parts by weight: 100 parts of epoxy resin (E-51), 25 parts of curing agent (DDM), 35 parts of glass beads (S35), 1 part of dispersant (EFKA-5044) , 1.5 parts of surfactant (Tween-20), 1.2 parts of coupling agent (KH-550), 6 parts of thinner (benzyl alcohol), 1.5 parts of anti-aging agent (2246), 3 parts of flame retardant (DMMP) .
[0028] (1) Melt the curing agent at 110°C, add bisphenol A epoxy resin, mix evenly at a low speed, and adjust the temperature to 40°C;
[0029] 3) Add dispersant, surfactant, inorganic hollow filler, flame retardant, anti-aging agent in sequence and stir evenly;
[0030] 4) Quickly add the diluent to the mixture, stir for 25 seconds, and immediately pour into a mold preheated to 40°C for foaming;
[0031] 5) Heat the mold to 90°C in turn, kee...
Embodiment 2
[0037] The preparation method of the high-strength rigid flame-retardant epoxy foam material of the present embodiment is as follows:
[0038] (1) Prepare materials according to the following components and parts by weight: 100 parts of epoxy resin (E-51:TDE-85=3:1 mixed), 35 parts of curing agent (DDM), 30 parts of glass microspheres (6522), 2 parts of dispersant (EFKA-5044), 5 parts of surfactant (organic silicon oil), 3 parts of coupling agent (KH-550), 8 parts of thinner (benzyl alcohol), 2 parts of anti-aging agent (2246), Fuel (DBDPE / Sb 2 o 3 ) 6 copies.
[0039] (1) Melt the curing agent at 110°C, add bisphenol A epoxy resin, mix evenly at a low speed, and adjust the temperature to 45°C;
[0040] 3) Add dispersant, surfactant, inorganic hollow filler, flame retardant, anti-aging agent in sequence and stir evenly;
[0041] 4) Quickly add the diluent to the mixture, stir for 20 seconds, and immediately pour it into a mold preheated to 40°C for foaming;
[0042] 5) He...
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Abstract
The invention relates to a high-strength hard flame-retardant epoxy foam material and a preparation method thereof. The epoxy foam material is prepared from the following ingredients in parts by weight: 100 parts of epoxy resin, 10 to 50 parts of curing agent, 0 to 40 parts of inorganic hollow filler, 1 to 5 parts of dispersing agent, 1 to 5 parts of surface active agent, 1 to 5 parts of coupling agent, 5 to 15 parts of diluent, 1 to 5 parts of antiager and 5 to 10 parts of flame retardant. In preparation, the curing agent is molten in 120 to 140 DEG C at first, the epoxy resin is added to be evenly mixed with the curing agent in a low speed, and temperature is adjusted to 30 to 50 DEG C; the dispersing agent, the surface active agent, the inorganic hollow filler, the flame retardant and the antiager are sequentially added to be stirred evenly; the diluents is quickly added into mixed materials to be stirred for 20 to 25s, and then the materials are instantly poured into a mould which is preheated to 30 to 40 DEG C to be foamed and shaped; the mould is sequentially heated to 60 to 90 DEG C, 100 to 130 DEG C and 150 to 180 DEG C and is kept warm for 1 to 2h respectively to perform curing treatment, and the high-strength hard flame-retardant epoxy foam material can be obtained after demoulding.
Description
technical field [0001] The invention relates to the technical field of aerospace manufacturing, in particular to a high-strength rigid flame-retardant epoxy foam material and a preparation method thereof. Background technique [0002] The advanced missile weapon system adopts the vertical launch technology, and the fragile cover is one of the key technologies in the development of the missile storage and launch system. As an important part of the missile storage and launch system, the fragile cover not only has a certain pressure bearing capacity, prevents the internal gas from leaking out, but also protects the missile in the launch box; when the missile is launched, it can withstand a certain impact force or gas Breaking under pressure conditions greatly improves the response speed of missile operations, and also has the advantages of light weight, maintenance-free, and high reliability. The key to making a breakable lid is the material. The fragile cover material must n...
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