A kind of alkyl diphenyl ether type cyanate resin and its preparation method and application

A technology of cyanate resin and alkyl diphenyl ether, which is applied in the field of synthesis of organic polymer materials, can solve problems such as limiting the scope of application, and achieve the effects of low cost, novel resin structure, and easy-to-obtain preparation raw materials

Inactive Publication Date: 2011-12-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the biggest disadvantage of this kind of resin is that it is particularly brittle, which limits its application range.

Method used

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  • A kind of alkyl diphenyl ether type cyanate resin and its preparation method and application
  • A kind of alkyl diphenyl ether type cyanate resin and its preparation method and application
  • A kind of alkyl diphenyl ether type cyanate resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The 5000ml three-necked bottle is equipped with a constant pressure funnel, mechanical stirring and condensation device. First put 1000g of phenol and 900g of methoxydiphenyl ether oligomer into the three-necked bottle. Melting, stirring evenly, the system is transparent yellow. First add 5 g of p-toluenesulfonic acid catalyst into the system, and the color of the system turns brownish red after stirring. After the system was heated to 70°C, the heating was stopped. At this time, due to the exothermic reaction, the temperature in the system will automatically rise. When the temperature rose to 90°C, bubbles appeared in the system. The temperature of the system spontaneously rises up to about 120°C, and then gradually cools down. At this time, 5 g of p-toluenesulfonic acid is added to the system. When the temperature of the system automatically dropped to 110°C and kept warm, fractions were collected. After 1 hour collection was complete and heating was discontinued...

Embodiment 2

[0053] Alkyl diphenyl ether type cyanate resins were formulated according to the following four formulas to prepare casting samples:

[0054] A-catalyst-free system;

[0055] B-catalyst is nickel acetylacetonate;

[0056] C-catalyst is manganese acetylacetonate;

[0057] D-Catalyst is cobalt acetylacetonate.

[0058] The dosage of the acetylacetone catalysts is respectively 300 ppm of the mass of the alkyl diphenyl ether type cyanate resin. Fully stir the catalyst and the alkyl diphenyl ether type cyanate resin system, and pour four different resin systems into the preheated mold. Put the mold into a vacuum oven, depressurize and remove air at 90°C. After the gas in the system is completely removed, solidify. The curing process is as follows: 140°C / 2hr+160°C / 2hr+180°C / 4hr, and then post-treatment at 200°C for 2hr, and the curing process ends. The physical properties of the cast body obtained are as shown in Table 1:

[0059] Table 1 Properties of alkyl diphenyl ether ty...

Embodiment 3

[0063] The thermal properties of the alkylxylene type cyanate resins with four different catalyst systems are shown in Table 2.

[0064] Table 2 Thermal properties of alkyl diphenyl ether type cyanate resin

[0065]

[0066]

[0067] Td5: The temperature at which the thermal weight loss is 5%. The test samples were post-treated by curing at 250°C for 5 hours.

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Abstract

The present invention relates to a novel structure of alkyl diphenyl ether type cyanate and its preparation method and application. The specific preparation method is to use hydroxyphenyl alkyl diphenyl ether and cyanogen halide as raw materials and use triethylamine as catalyst to prepare have to. Under the action of appropriate catalyst and heat, the prepared cyanate can undergo curing reaction at relatively low temperature. After the post-treatment process, the curing degree of the material can reach more than 90%. The material has excellent dielectric properties, heat and humidity resistance, thermal properties and mechanical properties. It can be used in aerospace vehicles, satellites, radome and high-performance printed circuits. board and other fields.

Description

technical field [0001] The invention belongs to the field of synthesis of organic polymer materials, and in particular relates to an alkyl diphenyl ether type cyanate resin and a preparation method and application thereof. Background technique [0002] Cyanate ester resin has been widely used in wave-transparent composite materials and high-performance structural materials because of its excellent heat resistance, dielectric properties, moisture resistance and small coefficient of thermal expansion (CTE). Cyanate resin can be cured alone or at a lower temperature under the action of a catalyst. After curing, a cross-linked network structure with a triazine ring structure is formed, and its thermal stability is far better than that of rings that are widely used today. oxygen resin. For example, bisphenol A cyanate resin, the most common type of cyanate ester, has a temperature of 430°C when it loses 95% of its weight, and a glass transition temperature of 290°C. But the big...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C07C265/12C07C263/00
Inventor 王家樑焦扬声张中云王帆余若冰朱亚平高国荣
Owner EAST CHINA UNIV OF SCI & TECH
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