A kind of high solid content graphene wave absorbing coating and preparation method thereof

A wave-absorbing coating, high solid content technology, applied in radiation-absorbing coatings, epoxy coatings, coatings, etc., can solve the problem of affecting the entire wide-band wave-absorbing effect, the flexibility does not meet the requirements, and the mechanical properties of the coating are poor. and other problems, to achieve the effect of obvious viscosity reduction, good toughening effect and improved construction performance.

Active Publication Date: 2021-02-09
CHANGZHOU GUANGHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing wave-absorbing coatings in the prior art: low solid content, low content of wave-absorbing agent, affecting the wave-absorbing effect; low-frequency wave-absorbing effect is poor, affecting the wave-absorbing effect of the entire wide-band; the mechanical properties of the coating are poor , poor adhesion, poor flexibility and other problems, the invention provides a high-solid broadband graphene wave-absorbing coating and its preparation method

Method used

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  • A kind of high solid content graphene wave absorbing coating and preparation method thereof
  • A kind of high solid content graphene wave absorbing coating and preparation method thereof
  • A kind of high solid content graphene wave absorbing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A component parts by weight

[0048]

[0049] The composition of graphene slurry parts by weight is:

[0050]

[0051] B component parts by weight

[0052] Polyamide curing agent 45 parts

[0053] Phenalkamine curing agent 45 parts

[0054] Solvent 10 parts

[0055] Specific process:

[0056] (1) Preparation of component A:

[0057] ①Preparation of graphene slurry: add graphene, dispersant, auxiliary dispersant and solvent according to the ratio, mix evenly, grind with a ball mill for 20 minutes, and then disperse with ultrasonic waves for 60 minutes to obtain graphene slurry.

[0058] ② Add E51 resin, epoxy toughening diluent, solvent, dispersant, anti-settling agent, anti-sagging agent, carbonyl iron powder, FeSiAl, special zinc oxide crystal and other powder materials, stir well and then sand mill.

[0059] ③Before sanding, observe the viscosity of the slurry, if the viscosity is too high, add epoxy toughening diluent.

[0060] ④Sand grinding to a finene...

Embodiment 2

[0066] A component parts by weight

[0067]

[0068]

[0069] The composition of graphene slurry parts by weight is:

[0070]

[0071] B component parts by weight

[0072] Polyamide curing agent 45 parts

[0073] Phenalkamine curing agent 45 parts

[0074] Solvent 10 parts

[0075] The preparation technology of A component and B component is the same as embodiment 1:

[0076] Mix evenly according to the weight ratio of A:B=7:1 to get high-solid graphene absorbing coating.

Embodiment 3

[0078] A component parts by weight

[0079]

[0080]

[0081] The composition of graphene slurry parts by weight is:

[0082]

[0083] B component parts by weight

[0084] Polyamide curing agent 45 parts

[0085] Phenalkamine curing agent 45 parts

[0086] Solvent 10 parts

[0087] The preparation technology of A component and B component is the same as embodiment 1:

[0088] Mix evenly according to the weight ratio of A:B=10:1 to get high-solid graphene absorbing coating.

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Abstract

The invention provides a preparation method of a high-solid-content broadband graphene wave-absorbing coating. Through the application of a dispersant and an epoxy dilution toughening agent, more powder materials such as wave-absorbing agents can be added, and the solid content can reach up to 95% %, which solves the problem of low absorbing performance due to insufficient absorbing agent content in the low frequency band, and at the same time cooperates with graphene, four-needle zinc oxide crystal and other electric loss absorbing agents to achieve a better impedance matching effect , to achieve high-efficiency absorbing in a wide frequency range. The coating has good mechanical properties, and its adhesion, flexibility and wear resistance are all better than conventional products. The construction performance of the coating is good, it is not easy to sag, and the film formation of one spray can reach 400um, which reduces the number of construction passes and loss, greatly improves the construction efficiency, and the VOC applied is very low, which belongs to the green environmental protection functional coating and has good Application prospects.

Description

technical field [0001] The invention belongs to the field of functional coatings, in particular to a graphene wave-absorbing coating with high solid content and a preparation method thereof. Background technique [0002] At present, the radar stealth technology widely used in the military mainly refers to the stealth technology for radars working in the range of 3MHz to 300GHz. The research focus of broadband radar stealth technology. The original radar stealth materials have shortcomings such as narrow frequency band, low efficiency, and high density, and their application range is limited to a certain extent. It is urgent to develop new wave-absorbing materials and corresponding stealth technologies. [0003] There are many types of wave-absorbing coatings, and some of them are relatively mature, such as ferrite, ultrafine metal powder, ceramic wave-absorbing coatings, etc. But most of the wave-absorbing coating materials that have been developed can only work in a certa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/32C09D7/61C09D7/65
CPCC09D5/32C09D163/00C09D7/61C09D7/65C09D7/70C08L33/08C08K13/04C08K3/18C08K3/042C08K7/08C08K3/34
Inventor 钟广义赵绍洪
Owner CHANGZHOU GUANGHUI CHEM
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