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Alkyl xylol type cyanate resin, preparation and uses thereof

A technology of alkylxylene type cyanate ester and hydroxyphenyl alkylxylene resin, which is applied in the field of organic polymer material synthesis, can solve problems such as hindering the popularization and use of resins, and is not very ideal, and achieves low raw material cost and low cost The effect of inexpensive, excellent dielectric properties

Inactive Publication Date: 2009-02-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many kinds of cyanate esters, and the most widely used one is bisphenol A cyanate ester, whose resin is white crystal, although the resin is compared with other high-performance resins (such as bismaleimide, polyimide) It has good molding processability and dimensional stability of composite materials, but it will crystallize out from the prepreg during use, which hinders the popularization and use of this resin in the field of composite materials
In addition, compared with other types of cyanate resins, the dielectric properties of bisphenol A cyanate (dielectric constant ε=2.98, dielectric loss tg δ=5×10 -3 ) and hygroscopicity (boiled in water for 48hr, the moisture absorption rate is 0.83%) are not very ideal

Method used

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  • Alkyl xylol type cyanate resin, preparation and uses thereof
  • Alkyl xylol type cyanate resin, preparation and uses thereof
  • Alkyl xylol type cyanate resin, preparation and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The 5000ml three-necked bottle is equipped with a constant pressure funnel, mechanical stirring and condensation device. First put 2000g of phenol and 1800g of methoxyxylyl ether oligomer into the three-necked bottle. Melting, stirring evenly, the system is transparent yellow. First add 9g 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 100°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, 9 g of p-toluenesulfonic acid is added to the system. When the temperature of the system automatically dropped to 110°C, keep it warm and collect fractions. After 1 hour collection was complete and heating was discontinued. Whe...

Embodiment 2

[0054] The casting body experimental formulation of the alkylxylene type cyanate resin is as follows: the catalysts are cobalt acetylacetonate and nonylphenol, and the dosages are 200ppm and 3% of the quality of the alkylxylene type cyanate resin, respectively. Mix the catalyst and the alkylxylene type cyanate resin evenly, and pour it 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 method of alkylxylene type cyanate resin has the following four ways:

[0055] A: 120°C / 2hr+150°C / 4hr

[0056] B: 120°C / 2hr+150°C / 2hr+180°C / 4hr

[0057] C: 120°C / 2hr+150°C / 2hr+180°C / 4hr+200°C / 2hr

[0058] D: 120°C / 2hr+150°C / 2hr+180°C / 4hr+200°C / 2hr+220°C / 2hr

[0059] The physical properties of the cast body obtained are as shown in Table 1:

[0060] Table 1 Properties of alkylxylene type cyanate resin after curing

[0061]

[0062] *1: The test condition is under the state...

Embodiment 3

[0064] The thermal properties of alkylxylene type cyanate resins containing different catalyst systems are shown in Table 2. Wherein I is a catalyst-free system, II is a cobalt acetylacetonate and nonylphenol mixed catalyst system, and III is a manganese acetylacetonate catalyst system.

[0065] Table 2 Thermal properties of alkylxylene type cyanate resins

[0066]

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Abstract

The invention relates to alkyl dimethylbenzene cyanic acid ester resin as well as a preparation method and an application thereof. The particular preparation method comprises the following steps: hydroxybenzene alkyl dimethylbenzene resin and cyan halide are taken as raw materials and tri-ethylamine is taken as the catalyst for preparation. The prepared alkyl dimethylbenzene cyanic acid ester resin undergoes solidifying reaction under relatively low temperature under the action of proper catalyst and heat; the solidifying degree after post-treatment can exceed 90 percent, and the materials achieved by solidification have excellent dielectric property, moisture and heat resisting performance and mechanical performance, and the like, and are applicable to the fields of aerospace aircraft, satellite, gantry radar antenna cover, high-performance printed circuit board, and the like.

Description

technical field [0001] The invention belongs to the field of synthesis of organic polymer materials, and in particular relates to an alkylxylene type cyanate resin and its preparation method and application. Background technique [0002] In the past few years, the application of cyanate esters as high-performance thermosetting resins in the fields of electronics and aerospace has made remarkable progress. The synthetic method about cyanate ester resin has been described in many documents (U.S.Pat.Nos.3403128; 5312887; 4028393; 4330658 etc.; Chinese patent CN1629137A, CN1218984C etc.). [0003] Cyanate ester resin was developed in the 1980s. Its structural characteristics endow it with excellent electrical insulation performance, radar transmission performance, low moisture absorption rate, heat resistance, dimensional stability and good mechanical properties. The good processability of the resin, the excellent thermal performance of bismaleimide resin and the heat insulatio...

Claims

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Application Information

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IPC IPC(8): C08G73/06C07C265/14C07C263/00
Inventor 王家樑焦扬声王帆张中云余若冰朱亚平
Owner EAST CHINA UNIV OF SCI & TECH
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