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Modified cyanate ester resin and preparation method and uses thereof

A technology of cyanate resin and modified resin, applied in the field of modified cyanate resin and its preparation, can solve problems such as complicated operation, and achieve the effects of good comprehensive performance, low viscosity characteristics and improved mechanical properties

Inactive Publication Date: 2007-10-10
梁国正 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since these RTM resin matrices are operated under heated conditions, this adds extra energy and complicates the operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of modified resin cyanate ester of the present invention is that at first cyanate ester monomer is heated above melting point, makes it change into liquid state, then adds pre-mixed styrene and divinylbenzene under the situation of stirring, After stirring evenly, add an appropriate amount of stabilizer and allow it to cool naturally to obtain a homogeneous liquid modified resin. The resin has viscosity characteristics and working life that meet the requirements of RTM process operation at room temperature.

[0033] Catalysts and initiators can be dissolved in the modified resin without any solvent, and are generally added directly before the RTM process operation, and can be heated to promote their dissolution if necessary.

Embodiment 1

[0035] Styrene and divinylbenzene were premixed in a ratio of 100:30 parts by weight. Weigh 50 parts (weight) of bisphenol A cyanate in a beaker, heat and stir in an oil bath at 85°C to melt. Then add 33.3 parts of a mixture of styrene and divinylbenzene, stir evenly, cool naturally to 55°C, add 2% stabilizer, stir evenly, cool naturally to room temperature to obtain modified cyanate resin.

[0036] Add organotin catalyst and initiator to the above-mentioned modified cyanate resin, and heat the resin to 40°C to promote the dissolution of the catalyst and initiator, then pour it into a glass mold coated with a release agent in advance, and press the 90℃ / 3h+110℃ / 2h+130℃ / 2h+150℃ / 2h+180℃ / 2h+200℃ / 1h for curing. The properties of the modified cyanate resin and its cured products are listed in Table 1 and Table 2.

Embodiment 2

[0038] Same as Example 1, but with a 65:35 ratio of bisphenol A cyanate to a mixture of styrene and divinylbenzene. The properties of the modified cyanate ester resin and its cured product are shown in Table 1 and Table 2.

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PUM

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Abstract

A modified cyanate ester resin which is a low-viscosity liquid at ordinary temp and its preparing process are disclosed. It has higher comprehensive property and lower viscosity, so it can be shaped by RTM technology and ordinary temp.

Description

1. Technical field: [0001] The invention relates to a modified cyanate resin and its preparation method and application, in particular to a low-viscosity modified cyanate resin which is liquid at room temperature. Modified cyanate ester resin is especially suitable for products formed by resin transfer molding (RTM), and can be applied to wave-transparent materials, mechanical structural materials and other fields. 2. Technical background: [0002] In the prior art, cyanate resin has good heat resistance, dielectric properties, mechanical properties, etc., and it belongs to high-performance resin matrix materials like epoxy resin and bismaleimide resin. It can be applied to structural materials, wave-transmitting materials, adhesive materials, dielectric functional materials, etc. in the aerospace field, electronic information field, etc. [0003] Due to the development of advanced composite material preparation technology-resin transfer molding process (RTM), people have t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/00
Inventor 梁国正李文峰辛文利马晓燕朱光明杨洁颖
Owner 梁国正
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