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Light-weight thin-wall wave-absorbing coating and preparation method thereof

A wave-absorbing coating and wave-absorbing material technology, applied in radiation-absorbing coatings, epoxy resin coatings, coatings, etc. The effect of excellent wave ability, improved wave absorbing ability, and excellent wave absorbing performance

Active Publication Date: 2022-03-15
苏州同构科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing wave-absorbing materials mainly use ferrite material as the main absorber of the wave-absorbing material. Although the wave-absorbing efficiency is high and the technology is relatively mature, there are problems such as low absorption rate, poor compatibility, and narrow frequency band. To meet the further requirements of scientific and technological development for absorbing performance; the prerequisite for the application of radar wave absorbing coatings is not only to have good absorbing performance in as wide a frequency band as possible, but also to have light coating, thin wall and excellent mechanical properties. It brings certain technical challenges to the development of wave-absorbing coatings
[0003] In order to broaden the scope of the main absorbent of the wave-absorbing material, Chinese patent CN102807801A discloses a wave-absorbing coating and its preparation method, by using carbon nanotubes, carbon nanotube dispersants, conductive carbon black, epoxy resin, and epoxy resin to dilute agent and epoxy resin curing agent to solve the performance defects of a single type of wave-absorbing material. Although it solved the dispersion problem of carbon nanotubes to a certain extent, it failed to effectively solve the problems of low absorption rate and narrow frequency band of wave-absorbing coatings; The wave-absorbing coating meets the application under high-temperature environment conditions. Chinese patent CN110157226A discloses a high-temperature-resistant wave-absorbing coating and its preparation method. By using a specific wave-absorbing agent and inorganic glue, one-step solid-phase sintering is carried out to obtain a good absorbing material. wave-absorbing agent, and then dispersed into high-temperature-resistant inorganic glue to form a high-temperature-resistant wave-absorbing coating with excellent performance. The coating is light in weight and excellent in high-temperature resistance. Junction limits its ability to absorb waves

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  • Light-weight thin-wall wave-absorbing coating and preparation method thereof

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Embodiment 1

[0037] Embodiment 1 of the present invention provides a light-weight and thin-walled wave-absorbing coating on the one hand. In parts by weight, the preparation raw materials include: 60 parts of wave-absorbing material, 50 parts of high polymer matrix, 25 parts of organic solvent, organic silicon 0.2 parts of material, 6 parts of toughening agent;

[0038] The absorbing material includes carbon-based nanomaterials and metal nanopowders, and the mass ratio of the carbon-based nanomaterials and metal nanopowders is 1:1.2;

[0039] The carbon-based nanomaterial is a combination of single-walled carbon nanotubes and nano-white carbon black;

[0040] The mass ratio of the single-walled carbon nanotubes and nano-silica is 0.6:1;

[0041] The CAS number of the single-walled carbon nanotube is 308068-56-6, the model is A77912, the outer diameter is 2nm, and the length is 10nm, purchased from Shanghai Jizhi Biochemical Technology Co., Ltd.;

[0042] The article number of the nano wh...

Embodiment 2

[0058] Embodiment 2 of the present invention provides a light-weight and thin-walled wave-absorbing coating on the one hand. In parts by weight, the preparation raw materials include: 63 parts of wave-absorbing material, 59 parts of high polymer matrix, 30 parts of organic solvent, organic silicon 0.3 parts of material, 8 parts of toughening agent;

[0059] The absorbing material includes carbon-based nanomaterials and metal nanopowders, and the mass ratio of the carbon-based nanomaterials and metal nanopowders is 1:1.5;

[0060] The carbon-based nanomaterial is a combination of single-walled carbon nanotubes and nano-white carbon black;

[0061] The mass ratio of the single-walled carbon nanotubes and nano-silica is 0.8:1;

[0062] The CAS number of the single-walled carbon nanotube is 308068-56-6, the model is A77912, the outer diameter is 2nm, and the length is 10nm, purchased from Shanghai Jizhi Biochemical Technology Co., Ltd.;

[0063] The article number of the nano wh...

Embodiment 3

[0079]Embodiment 3 of the present invention provides a light-weight and thin-walled wave-absorbing coating on the one hand. In parts by weight, the preparation raw materials include: 52 parts of wave-absorbing material, 45 parts of high polymer matrix, 20 parts of organic solvent, organic silicon 0.1 parts of material, 4 parts of toughening agent;

[0080] The absorbing material includes carbon-based nanomaterials and metal nanopowders, and the mass ratio of the carbon-based nanomaterials and metal nanopowders is 1:1;

[0081] The carbon-based nanomaterial is a combination of single-walled carbon nanotubes and nano-white carbon black;

[0082] The mass ratio of the single-walled carbon nanotubes and nano-silica is 0.5:1;

[0083] The CAS number of the single-walled carbon nanotube is 308068-56-6, the model is A77912, the outer diameter is 2nm, and the length is 10nm, purchased from Shanghai Jizhi Biochemical Technology Co., Ltd.;

[0084] The article number of the nano white...

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Abstract

The invention relates to the field of C09D163 / 00, in particular to a light-weight and thin-wall wave-absorbing coating and a preparation method thereof. According to the invention, the carbon nano-material and the metal nano-powder are used as wave-absorbing materials, and the mass ratio of the carbon nano-material to the metal nano-powder is controlled to be 1: (1-1.5), so that the wave-absorbing coating has excellent wave-absorbing performance within the wave frequency of 6-18GHz, and the wave-absorbing coating is light in weight, thin in wall and excellent in mechanical property; by adopting hydantoin epoxy resin as a high polymer matrix, KH-550 as an organic silicon material and XL2740 as a toughening agent, the dispersity of the wave-absorbing material in a system is improved, and the comprehensive performance of the wave-absorbing coating can be improved by cooperating with substances such as nano titanium dioxide and nano zinc oxide in the system, so that the wave-absorbing coating is endowed with the required binding power and strength, and the wave-absorbing coating has the advantages of favorable heat resistance and favorable heat resistance. The prepared coating is resistant to high temperature, excellent in mechanical property and good in chemical stability, and can be better applied to the military field.

Description

technical field [0001] The invention relates to the field of C09D163 / 00, in particular to a light-weight and thin-walled wave-absorbing coating and a preparation method thereof. Background technique [0002] Radar wave absorbing coatings are mainly used in the stealth of equipment within the radar wave detection range of 30MHz-100GHz, of which 2GHz-18GHz is a very important centimeter wave band. The existing wave-absorbing materials mainly use ferrite material as the main absorber of the wave-absorbing material. Although the wave-absorbing efficiency is high and the technology is relatively mature, there are problems such as low absorption rate, poor compatibility, and narrow frequency band. To meet the further requirements of scientific and technological development for absorbing performance; the prerequisite for the application of radar wave absorbing coatings is not only to have good absorbing performance in as wide a frequency band as possible, but also to have light coa...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/32C09D7/61C09D7/65C09D7/63
CPCC09D163/00C09D5/32C09D7/61C09D7/65C09D7/63C09D7/67C08K2003/0856C08K2003/2241C08K2003/2296C08K2201/011C08K2201/005C08K2201/006C08L9/02C08K5/544C08K3/08C08K3/22C08K3/041C08K7/26
Inventor 吕东清吕向成
Owner 苏州同构科技有限公司
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