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Modified cyanate ester resin as well as preparation method and application thereof

A cyanate ester resin and cyanate ester technology, applied in the field of cyanate ester resin, can solve the problems of high crosslinking density, high cyanate ester curing temperature, limited space for improving the dielectric properties of pure cyanate ester resin, etc. The effect of improving wave transmission performance and reducing dielectric loss

Active Publication Date: 2021-12-21
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high curing temperature, long time, high crosslinking density and brittle cured properties of cyanate ester resin, there is limited room for improving the dielectric properties of pure cyanate ester resin.

Method used

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  • Modified cyanate ester resin as well as preparation method and application thereof
  • Modified cyanate ester resin as well as preparation method and application thereof
  • Modified cyanate ester resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Heat 100g of BADCy and 5g of E-51 to 160°C, mix well, and react until the sample has no crystallization phenomenon, which is recorded as CE-EP prepolymer, wherein the mass of E51 is 5% of the mass of BADCy;

[0048] Step 2. At 25°C, add the pretreated PSN to the prepolymer in step 1, wherein the added mass of the pretreated PSN is 2% of the prepolymer to obtain a modified cyanate, denoted as 2 -PSN / CE-EP.

[0049] The pretreated PSN was prepared according to the following method: put the original PSN into a round-bottomed flask, and use a rotary evaporator to perform rotary evaporation treatment. The conditions of the rotary evaporation treatment are: the rotation speed is 120r / min, and the temperature is 40°C. In order to remove the ammonia in the PSN, obtain the pretreated PSN.

Embodiment 2

[0051] The method for preparing modified cyanate is the same as in Example 1, the difference is that in step 2, the added mass of PSN after pretreatment is 3% of the prepolymer to obtain modified cyanate, which is denoted as 3-PSN / CE -EP.

Embodiment 3

[0053] The method for preparing modified cyanate is the same as in Example 1, the difference is that in step 2, the added mass of PSN after pretreatment is 4% of the prepolymer to obtain modified cyanate, which is denoted as 4-PSN / CE -EP.

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Abstract

The invention provides modified cyanate ester as well as a preparation method and application thereof. Starting from stable structures of a low-dielectric triazine ring and oxazolidine, a polysilazane modified curing network is introduced into a prepolymer, so that the wave transmission performance of the modified cyanate ester resin is effectively regulated and improved. The specific preparation method comprises the following steps: heating cyanate ester resin and epoxy resin to 150-160 DEG C, uniformly conducting mixing, and conducting reacting until a sample does not have a crystallization phenomenon, so as to obtain a prepolymer; and adding the pretreated polysilazane into the prepolymer to obtain the modified cyanate ester. The prepared modified cyanate effectively improves the dielectric and wave-transparent properties of the material, reduces the dielectric loss of the material, improves the wave-transparent property, and has important research value and application potential in the fields of aircraft radomes and radomes.

Description

technical field [0001] The invention relates to the technical field of cyanate resin, and more specifically relates to a modified cyanate resin and its preparation method and application. Background technique [0002] In recent years, radar communication technology has been developed rapidly, and the performance requirements for radome are gradually increasing. A radome is a key functional component that is transparent to electromagnetic waves and protects the internal radar from damage. In order to protect the normal operation of communication, guidance, telemetry and other systems of aerospace vehicles in harsh environments, and to promote the development of new high-Mach number aircraft in the direction of high-speed flight, precision guidance, long-range strikes, and terminal maneuvering, the design of high-performance radome / antenna window, Material selection and preparation become one of the bottlenecks. Specifically, whether it is the selection and development of ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00B64C1/36
CPCC08G81/00B64C1/36
Inventor 李建伟赵文忠孔杰王一琇于震
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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