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Modified ethylene rhodanate resin and preparation thereof

A cyanate ester resin and cyanate ester technology, which is applied in the field of modified cyanate resin and its preparation, can solve the problems of increased brittleness and poor processability of CE resin, and achieve excellent dielectric properties and heat and humidity resistance, High toughness, outstanding thermal stability effect

Inactive Publication Date: 2009-05-20
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A major disadvantage of this approach is that it often results in increased brittleness of catalytically cured CE resins (due to increased crosslink density)
In terms of toughening research, it is mainly to use copolymerization / blending toughening with thermoplastic resins, rubber, thermosetting resins, and inorganic rigid particles. A common phenomenon in these methods is that it is difficult to maintain the original excellent properties of CE resins (such as dielectric performance, heat resistance, moisture resistance, etc.) and at the same time take into account the catalytic curing of CE resin
In addition, it may also bring new problems of poor manufacturability

Method used

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  • Modified ethylene rhodanate resin and preparation thereof
  • Modified ethylene rhodanate resin and preparation thereof
  • Modified ethylene rhodanate resin and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 2.52g of distilled water and 22.4g of γ-methacryloxypropyltrimethoxysilane KH570 and mix evenly, then slowly add HCl with a concentration of 38% dropwise at room temperature and under magnetic stirring until the pH of the solution is 1.8 . 15 minutes after the completion of the dropwise addition, the temperature was raised to 50°C to continue the reaction for 5 hours. After the reaction was completed, it was dried in vacuum for 4 hours, and the methanol was evaporated to obtain a transparent and viscous hyperbranched polysiloxane with double bonds as terminal groups.

[0021] Weigh 1 g of the above hyperbranched polysiloxane and 100 g of bisphenol A cyanate, and mix them uniformly at 80° C. under stirring conditions to obtain a modified CE resin.

Embodiment 2

[0023] According to the method of Example 1, a hyperbranched polysiloxane with a double bond as an end group was prepared.

[0024] Weigh 5.26g of the above-mentioned hyperbranched polysiloxane and 100g of bisphenol A cyanate, and mix them uniformly at 150°C under stirring conditions to obtain the modified CE resin.

[0025] Pour the obtained modified CE resin into the preheated mold, vacuum defoam at 150°C for 2 hours, and then perform curing and post-treatment according to the processes of 1800C / 2h+2000C / 2h+2200C / 2h and 2400C / 4h respectively , demoulding after natural cooling, that is, the cured modified CE resin is obtained. Typical properties of cured resins are listed in Figure 2 to Figure 5 .

Embodiment 3

[0027] According to the method of Example 1, a hyperbranched polysiloxane with a double bond as an end group was prepared.

[0028] Weigh 11.11g of the above-mentioned hyperbranched polysiloxane and 100g of bisphenol A cyanate, and mix them uniformly at 120°C under stirring conditions to obtain the modified CE resin.

[0029] Pour the obtained modified CE resin into the preheated mold, vacuum defoam at 150°C for 2 hours, and then perform curing and post-treatment according to the processes of 1800C / 2h+2000C / 2h+2200C / 2h and 2400C / 4h respectively , demoulding after natural cooling, that is, the cured modified CE resin is obtained. Typical properties of cured resins are listed in Figure 2 ~ Figure 4 .

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Abstract

The invention relates to a modified cyanate resin and a preparation method thereof. Distilled water and Gamma-Methlacryloyl oxyl propyl trimethoxy silane are evenly mixed according to a mole ratio of 1.4:1 to 1.2:1; high concentration HCI is added to the solution until the PH value thereof is 1 to 2; after 10 to 15 minutes, the solution is heated up to 50 DEG C to 60 DEG C and reacts continuously for 4 hours to 6 hours; a hyperbranched polysiloxane with double bond as terminal group is obtained through vacuum drying. By weight, 1 portion to 25 portions of the hyperbranched polysiloxane and 100 portions of cyanate are evenly mixed at the temperature of 80 DEG C to 150 DEG C to obtain the modified cyanate resin. The resin has high tenacity, quick curing, more prominent thermal stability, more excellent electrical property and damp-heat resistance. The preparation method adopted is characterized by wide applicability and simple operation process.

Description

technical field [0001] The invention relates to a modified cyanate resin and a preparation method thereof. Background technique [0002] Cyanate ester (CE) resin is recognized as "the most competitive resin variety for preparing structural-functional materials in the 21st century" because of its excellent dielectric properties, outstanding heat resistance, and good comprehensive mechanical properties. , showing great application prospects in cutting-edge fields such as electronic appliances and aerospace. [0003] The rapid development of modern industry has put forward higher and more performance requirements for materials, mainly in more prominent thermal stability, better dielectric properties, better toughness, lower water absorption, and better molding Craftsmanship. CE resin is a kind of thermosetting resin. Like other thermosetting resins, CE resin also has the problem of high brittleness. In addition, CE resin also has the disadvantage of high curing temperature. ...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08G77/388
Inventor 顾嫒娟周成梁国正季立富袁莉
Owner SUZHOU UNIV
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