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Method for preparing cyanate ester resin prepolymer

A technology of cyanate ester resin and prepolymer, which is applied in the field of preparation of cyanate ester resin prepolymer, can solve the problems that cannot meet the requirements of industrial applications, and achieve the effect of low processing cost and good fluidity

Inactive Publication Date: 2011-02-02
江都市吴桥树脂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The gel time (Tgel) controlled by the prepolymerization degree of the current cyanate resin prepolymer is ≥10min (150°C), which cannot meet the requirements of some industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The present invention takes bisphenol A type cyanate resin as raw material, prepares according to the following steps:

[0013] 1) Put the solid bisphenol A cyanate resin into the prepolymerization reactor, heat it to 140°C, keep it warm for 20 hours, stir it until the refractive index is 1.580, and control its viscosity to 350mPa·s / 25 ℃;

[0014] 2), cool the product obtained in the previous step, and keep stirring during the cooling period;

[0015] 3) When the cooling temperature reaches 75°C, keep this temperature, add 20% butanone by weight of bisphenol A cyanate resin, continue to stir, and then cool until it is cooled to 25°C, and stir evenly during the recooling period. A cyanate resin prepolymer was obtained.

Embodiment 2

[0017] The present invention takes bisphenol A type cyanate resin as raw material, prepares according to the following steps:

[0018] 1) Put the solid bisphenol A cyanate resin into the prepolymerization reactor, heat it to 145°C, keep it warm for 18 hours, and stir it until the refractive index is 1.583, and control its viscosity to 550mPa·s / 25 ℃;

[0019] 2), cool the product obtained in the previous step, and keep stirring during the cooling period;

[0020] 3) When the cooling temperature reaches 80°C, keep the temperature, preferably add butanone with 25% weight of bisphenol A cyanate resin, continue to stir, and then cool until it cools to 23°C, and stir evenly during the recooling period , to prepare cyanate resin prepolymer.

Embodiment 3

[0022] The present invention takes bisphenol A type cyanate resin as raw material, prepares according to the following steps:

[0023] 1) Put the solid bisphenol A type cyanate resin into the prepolymerization reactor, heat it to 150°C, keep it warm for 15 hours, and stir it until the refractive index is 1.585, and control its viscosity to 750mpP·s / 25 ℃;

[0024] 2), cool the product obtained in the previous step, and keep stirring during the cooling period;

[0025] 3) When the cooling temperature reaches 85°C, keep this temperature, preferably add butanone with 30% weight of bisphenol A cyanate resin, continue to stir, and then cool until it cools to 20°C, and stir evenly during the recooling period , to prepare cyanate resin prepolymer.

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Abstract

The invention relates to a method for preparing a cyanate ester resin prepolymer and relates to preparation of the cyanate ester resin prepolymer. Bisphenol A-type cyanate ester resin is taken as a raw material and the method comprises the following steps: 1, the solid-state bisphenol A-type cyanate ester resin is put into a prepolymerization reactor, is heated to a temperature of between 140 and150 DEG C, is kept at the temperature for 15 to 20 hours; meanwhile, the mixture is stirred till refractive index is between 1.580 and 1.585; and viscosity is controlled between 350 and 750mpa.s / 25 DEG C; 2, the solution prepared in the step one is cooled and is continuously stirred in the cooling period; and 3, when the cooling temperature is between 75 and 85 DEG C, the solution is kept at the temperature; butanone accounting for 20 to 30 percent of weight of the bisphenol A-type cyanate ester resin is added into the solution, is continuously stirred; and when the solution is even, the solution is cooled to a temperature of between 20 and 25 DEG C and is evenly stirred in the cooling period to prepare the cyanate ester resin prepolymer. The cyanate ester resin prepolymer prepared through the method has certain molecular weight, certain viscosity and good fluidity; and the appearance of the prepolymer shows salmon pink liquid. The chemical property and quality standard of the prepolymer are equivalent to solid cyanate ester resin. The method has low processing cost.

Description

technical field [0001] The invention relates to a preparation method of a cyanate resin prepolymer, in particular to a preparation method of a cyanate resin prepolymer with good high temperature resistance. Background technique [0002] Cyanate resin is a new type of high-performance thermosetting resin developed in recent years. It has excellent dielectric properties, heat resistance and mechanical properties. It is an important basic material in aerospace, electronics and information communication industries. It has extremely broad application prospects in military and civilian fields. At present, cyanate is the most widely used in the printed circuit board manufacturing industry in the civilian field. In the late 1980s, developed countries such as the United States and Japan have developed and produced high-performance printed circuit boards with cyanate ester as the resin matrix to meet the high-frequency microwave (above 1GHz) signal transmission requirements, but the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/00
Inventor 葛芳顺陆寿伯陆有华金中宝朱冬顺吴华康
Owner 江都市吴桥树脂厂