Wave-absorbing foam and preparation method thereof

A foam and electromagnetic wave technology, applied in the field of wave-absorbing materials, can solve the problems that affect popularization and application, difficulty in secondary processing, performance degradation, etc., and achieve the effects of avoiding poor environmental resistance, good processing performance, and preventing oxidation and corrosion

Active Publication Date: 2022-08-05
安徽璜峪电磁技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional cement inorganic foaming materials simply add electromagnetic wave absorbers to the cement foam in a blended manner to form absorbing foams. A large amount of electromagnetic wave absorbing agents leads to severe foam slag, poor processability, and difficult secondary processing. , affecting popularization and application, and metal electromagnetic wave absorbers such as iron powder are prone to performance degradation due to moisture absorption and corrosion, which affects their further popularization and application

Method used

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  • Wave-absorbing foam and preparation method thereof
  • Wave-absorbing foam and preparation method thereof
  • Wave-absorbing foam and preparation method thereof

Examples

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preparation example Construction

[0046] A preparation method for preparing the above-mentioned wave-absorbing foam, comprising the steps:

[0047]S1, weigh the resin curing agent and water in proportion, add the resin curing agent to the water, and disperse the resin curing agent uniformly with a high-speed shearing disperser to obtain mixture A; because the cement foaming material contains many components, including water, foaming agent and cement powder, etc., the cement foaming material in this application adopts the cement foaming material in the prior art, and there is no special requirement, and it can be used according to the conventional ratio. The quality of water in this step refers to the quality of the water in the required proportion of the corresponding mass portion of the cement foamed material, and the rest are the other components such as the foaming agent and the cement powder in the cement foamed material.

[0048] S2, weighing 1 / 3-1 / 2 mass fraction of the polymer resin and the electromagne...

Embodiment 1

[0053] The present embodiment provides a kind of wave absorbing foam, which is composed of the following mass fraction materials:

[0054]

[0055]

[0056] The performance parameters of the waterborne polyurethane resin are as follows:

[0057] type: waterborne polyurethane Viscosity: ≥100mPa.s (viscosity adjustable) Exterior: Milky white liquid Solid content: 40±1％ PH: 6-9 Softening Point: 55-60℃ proportion: 1.06±0.02g / cm 3

Temperature resistance: 60℃(single component)

[0058] A preparation method for preparing the above-mentioned wave-absorbing foam, comprising the steps:

[0059] S1, weigh 40 parts by mass of water and 15 parts by mass of A05 polyisocyanate curing agent, add resin curing agent to water, and uniformly disperse with a high-speed shear disperser to obtain mixture A for later use;

[0060] S2, weigh 10 parts by mass of AH-0201A water-based polyurethane resin and 50 parts by mass of carbonyl iron pow...

Embodiment 2

[0066] The present embodiment provides a kind of wave absorbing foam, which is composed of the following mass fraction materials:

[0067]

[0068]

[0069] A preparation method for preparing the above-mentioned wave-absorbing foam, comprising the steps:

[0070] S1, weigh 35 parts by mass of water, 5 parts by mass of amino curing agent 717 and 10 parts by mass of chopped carbon fiber electromagnetic wave absorber, add resin curing agent to water, and uniformly disperse with a high-speed shear disperser to obtain mixture A for later use;

[0071] S2, weigh 4 parts by mass of AR648A water-based acrylic resin and 60 parts by mass of carbonyl iron powder electromagnetic wave absorber, stir for 2 hours to fully wet the carbonyl iron powder electromagnetic wave absorber with the resin, and obtain mixture component B for use;

[0072] S3, slowly adding mixture B to mixture A, maintaining a rotating speed of 50-100 r / min, so that the resin on the surface of the electromagnetic ...

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Abstract

The invention discloses wave-absorbing foam, and belongs to the technical field of wave-absorbing materials. The wave-absorbing foam is prepared from the following materials in parts by mass: 50 parts of cement powder; 30 to 50 parts of water; 0.5 to 10 parts of a foam stabilizer; 0.5-10 parts of a foaming agent; 5-30 parts of polymer resin; 1-20 parts of a resin curing agent; and 5-100 parts of an electromagnetic wave absorbent. The invention also provides a preparation method of the wave-absorbing foam, which comprises the following steps: S1, weighing the resin curing agent and the water in proportion to obtain a mixture A; s2, weighing 1/3-1/2 mass fraction of the polymer resin and the electromagnetic wave absorbent to obtain a mixture B; s3, adding the mixture B into the mixture A to obtain a suspension C; s4, adding cement powder, a foam stabilizer, a foaming agent and the remaining parts by mass of polymer resin into the suspension C to obtain wave-absorbing foam slurry; and S5, pouring the wave-absorbing foam slurry into a mold to obtain the wave-absorbing foam block.

Description

technical field [0001] The invention relates to the technical field of wave absorbing materials, in particular to a wave absorbing foam and a preparation method. Background technique [0002] Organic absorbing foams represented by polyurethane foam absorbing materials and multi-layer PMI absorbing foams have the characteristics of light weight and high strength, high electromagnetic wave absorption strength, and wide absorption frequency range, which are very suitable for aerospace products for lightweight and high performance. It has been widely used in the aerospace field in recent years. However, such materials are expensive, have poor temperature resistance (not exceeding 300°C), and poor dimensional stability (thermal expansion coefficient 50*10-5 / K), which limit their popularization and application in the field of ground equipment. [0003] Cement inorganic foam material has the characteristics of low price, high temperature resistance (long-term resistance to 600 ℃),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06C04B38/02C04B38/10C04B103/42C04B103/48
CPCC04B28/04C04B28/06C04B38/02C04B38/10C04B2103/48C04B2103/42C04B2111/00258C04B2201/20C04B2201/50C04B22/068C04B24/08C04B24/282C04B24/28C04B14/34C04B2103/40C04B24/2641C04B14/386Y02W30/91
Inventor 夏益尹有彬靳猛夏冰晖
Owner 安徽璜峪电磁技术有限公司
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