Cyanate/microcapsule resin system and preparation method thereof

A technology of microcapsules and cyanate esters, which is applied in the field of new cyanate ester resin systems and their preparation, cyanate ester/microcapsule resin systems and their preparation fields, can solve the problem that the performance strength of the cured product is reduced, the curing reaction rate is fast, and the resin Uneven curing degree and other problems, to achieve the effect of good mechanical properties

Inactive Publication Date: 2011-08-31
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for CE, the addition of catalysts has caused new problems, that is, the curing reaction rate is fast, t...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] According to the Chinese invention patent "polyurea formaldehyde-coated organotin compound microcapsules and preparation method" with the publication number CN101580624, the polyurea with a particle size of 0.5-1000 μm, a wall thickness of 0.1-60 μm and a capsule core content of about 60% is obtained. Formaldehyde-coated organotin compound microcapsules, the organotin compound is dibutyltin dilaurate and dibutyltin dilaurate-cyanate.

[0012] Weigh 100g of 4,4'-dicyanatodiphenylpropane in a 250ml beaker, heat and melt at 100°C, add polyurea formaldehyde-coated dibutyltin dilaurate-4,4 with an average particle size of 150μm 0.125, 0.25, 0.5, 5 g of ′-dicyanate-based diphenylpropane compound microcapsules were prepolymerized at 100~120°C for a certain period of time under stirring conditions to obtain a CE prepolymerization system containing microcapsules. In the mold preheated and coated with release agent, vacuum degas at 90~100°C for 30 minutes, and cure according to t...

Embodiment 2

[0017] Weigh 100g of 4,4'-dicyanatodiphenylpropane in a 250ml beaker, heat and melt at 100°C, add polyurea formaldehyde-coated dibutyltin dilaurate microcapsules with an average particle size of 150μm 0.125 , 0.25, 0.5g, prepolymerize at 100~120℃ for a certain period of time under stirring conditions to obtain a CE prepolymerization system containing microcapsules, inject the above system into a mold that has been preheated and coated with a release agent, and heat it at 90~100℃ Vacuum degassing at ℃ for 30 minutes, and curing according to the process of 120℃ / 2h+150℃ / 2h+180℃ / 2h+200℃ / 2h. The prepared material is cut to the required size on the cutting machine to test the performance. Table 2 shows the reactivity of the cyanate ester (CE) / microcapsule resin system and the cured performance of the CE / microcapsule resin system provided in this example.

[0018] Table 2

[0019] 150μm microcapsule content (wt%)

[0020] It can be seen from Table 2 that after adding 150 ...

Embodiment 3

[0022] Weigh 100g of 4,4'-dicyanatodiphenylpropane in a 250ml beaker, heat and melt at 100°C, add polyurea formaldehyde-coated dibutyltin dilaurate microcapsules with an average particle size of 20μm 0.125 , 0.25, 0.5g, prepolymerize at 100~120℃ for a certain period of time under stirring conditions to obtain a CE prepolymerization system containing microcapsules, inject the above system into a mold that has been preheated and coated with a release agent, and heat it at 90~100℃ Vacuum degassing at ℃ for 30 minutes, and curing according to the process of 120℃ / 2h+150℃ / 2h+180℃ / 2h+200℃ / 2h. Test the properties after cutting the prepared material to the required size on the cutting machine. Table 3 shows the reactivity of the cyanate ester (CE) / microcapsule resin system and the cured performance of the CE / microcapsule resin system provided in this example.

[0023] table 3

[0024] 50μm microcapsule content (wt%)

[0025] It can be seen from Table 3 that after adding 50 ...

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Abstract

The invention discloses a cyanate/microcapsule resin system and a preparation method thereof. The preparation method is as follows: calculated by weight, 100 parts of cyanate (CE) is heated at 80-100 DEG C to melt, organotin microcapsule coated with 0.125-5 parts of polyurea formaldehyde is filled in CE resin; and by utilizing the controlled-release function of the polyurea formaldehyde used as the microcapsule wall material to the organotin compound used as the microcapsule core catalyst, the CE curing reaction temperature and reaction rate can be adjusted. After being cured, the obtained CE/microcapsule resin system has good mechanical properties; and the resin system can be used to prepare high-performance composites used in aviation and aerospace, electronic elements and the like.

Description

technical field [0001] The invention relates to a cyanate ester / microcapsule resin system and a preparation method thereof. It specifically relates to a new type of cyanate that fills polyurea-formaldehyde-coated organotin compound microcapsules into the cyanate resin system, and adjusts the reaction rate of the cyanate resin through the slow-release effect of the microcapsules on the core material. A resin system and a preparation method thereof belong to the field of high-performance composite materials. Background technique [0002] Cyanate (CE) resin is a new type of high-performance thermosetting resin with both structure and functionality developed in the 1980s. Its monomer contains two or more cyanate (-OCN) functional groups. Due to the special structure and reactivity of CE resin, its cured product has a series of outstanding advantages, such as high heat resistance, low moisture absorption rate, excellent dielectric properties, and very low dielectric constant (e=...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08L79/04C08L61/24
Inventor 袁莉梁国正顾嫒娟陈凤林超
Owner SUZHOU UNIV
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