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Ultrahigh-voltage-resistant insulating resin suitable for vacuum suction and injection molding and preparation method thereof

A technology of vacuum suction and insulating resin, applied in the field of insulating resin, can solve the problems of high viscosity and inapplicability, and achieve the effects of good mechanical properties, improved comprehensive performance and good electrical insulation performance

Active Publication Date: 2022-07-05
叶金蕊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current epoxy resin itself has a high viscosity and is not suitable for vacuum injection molding process

Method used

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  • Ultrahigh-voltage-resistant insulating resin suitable for vacuum suction and injection molding and preparation method thereof
  • Ultrahigh-voltage-resistant insulating resin suitable for vacuum suction and injection molding and preparation method thereof

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preparation example Construction

[0027] The present invention provides, in a first aspect, a preparation method of an ultra-high voltage resistant insulating resin suitable for vacuum injection molding, the preparation method comprising the following steps:

[0028] (1) According to the mass ratio of the matrix resin and the toughening agent is (2-15):1 (for example, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1 , 9:1, 10:1, 11:1, 12:1, 13:1, 14:1 or 15:1), and then under an inert gas (such as N 2 ) under the protection of 60-100°C (eg 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C or 100°C) under stirring for 1-3h (eg 1, 1.5, 2, 2.5 or 3h) to obtain a toughened matrix resin; in some specific embodiments, after mixing the matrix resin and the toughening agent according to the mass ratio, start stirring, the stirring speed is 200r / min, and at the same time, feed N 2 , heated to 80°C, and stirred for 2 hours; after stirring, a toughened matrix resin was obtained.

[0029] (2) According to the mass ratio of the toughening...

Embodiment 1

[0057] Step 1: Preparation of toughened matrix resin

[0058] After mixing 40 parts of bisphenol F type epoxy resin 830S with 5 parts of liquid polysulfide rubber (JLY-121 liquid polysulfide rubber), start stirring, and the stirring speed is 200r / min; at the same time, feed N 2 , heated to 80°C, and stirred for 2 hours; after stirring, a toughened matrix resin was obtained.

[0059] Step 2: Modification of toughened matrix resin

[0060] Add the toughened base resin obtained in step 1 and 5 parts of modifier (triethylamine) into a stirring vessel (the mass ratio of toughened base resin to modifier is 9:1), and in an oil bath of 80 Stir at ℃ for 4 hours to obtain the first modified and toughened matrix resin.

[0061] Step 3: Preparation of the second modified and toughened matrix resin

[0062] 10 parts of silane (ethyl orthosilicate) and the first modified and toughened base resin obtained above were added to the container (the mass ratio of the first modified and toughene...

Embodiment 2

[0066] Step 1: Preparation of toughened matrix resin

[0067] After mixing 70 parts of bisphenol F type epoxy resin 830S with 15 parts of liquid polysulfide rubber (JLY-121 liquid polysulfide rubber), start stirring, and the stirring speed is 200r / min; 2 , heated to 80°C, and stirred for 2 hours; after stirring, a toughened matrix resin was obtained.

[0068]Step 2: Modification of toughened matrix resin

[0069] Add the toughened base resin obtained in step 1 and 15 parts of modifier (triethylamine) into a stirring vessel (the mass ratio of toughened base resin to modifier is 5.7:1), and in an oil bath of 80 Stir at ℃ for 4 hours to obtain the first modified and toughened matrix resin.

[0070] Step 3: Preparation of the second modified and toughened matrix resin

[0071] Add 30 parts of silane (ethyl orthosilicate) and the first modified and toughened base resin obtained above into the container (the mass ratio of the first modified and toughened base resin to silane is 3...

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Abstract

The invention relates to an extra-high voltage resistant insulating resin suitable for vacuum suction injection molding and a preparation method thereof. The method comprises the following steps: mixing matrix resin and a flexibilizer according to a mass ratio of (2-15): 1, and stirring for 1-3 hours at 60-100 DEG C under the protection of N2 to obtain toughened matrix resin; mixing the toughened matrix resin with a modifier according to a mass ratio of (1.5-18): 1, and stirring at 60-100 DEG C for more than 3 hours to obtain modified toughened matrix resin; mixing the modified toughened matrix resin with silane according to a mass ratio of (1.5-10): 1, and stirring at 50-80 DEG C for 1-3 hours; and then adding the accelerant and uniformly stirring, and then adding the reactive diluent and uniformly stirring to obtain the extra-high voltage resistant insulating resin suitable for vacuum suction injection molding. The invention provides the preparation method of the extra-high voltage resistant insulating resin suitable for vacuum suction and injection molding, and the performance of an insulating resin composite material can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of insulating resins, and particularly relates to an ultra-high voltage resistant insulating resin suitable for vacuum suction injection molding and a preparation method thereof. Background technique [0002] Epoxy resin is an important UHV insulating material. It has the advantages of good electrical insulation and strong corrosion resistance, and is the main base material for UHV insulating equipment. At present, almost all insulating parts are made of epoxy resin / aramid fiber composite material, and the preparation process mostly adopts RTM (resin transfer molding method). The vacuum suction molding process is a new liquid molding process that has emerged in recent years, and has achieved some applications in aerospace. Moisture, and open the channel for the flow of resin in the mold cavity, forming a complete channel, more importantly, vacuum suction molding completely uses vacuum, effectively avoiding ...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08L81/04C08L9/00C08K5/17C08K5/5415
CPCC08L63/00C08L81/04C08K5/17C08K5/5415C08L9/00
Inventor 叶金蕊
Owner 叶金蕊
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