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Extra-high voltage resistant insulating resin and preparation method thereof

An insulating resin and high-voltage technology, which is applied in the field of insulating resin, can solve the problems of epoxy resin mechanical properties, electrical aging resistance and breakdown strength reduction, affecting the service life of epoxy resin insulating parts, and discharge breakdown products. To achieve excellent electrical insulation performance, increase the glass transition temperature and insulation performance, and improve the effect of insulation performance

Active Publication Date: 2022-07-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current epoxy resin is mainly based on the addition of Al 2 o 3 Particle-based, Al 2 o 3 The addition of particles can improve the thermal properties of epoxy resin, but the mechanical properties, electrical aging resistance and breakdown strength of epoxy resin will be reduced, which will greatly increase the risk of discharge breakdown and product cracking in UHV electric field , which seriously affects the service life of epoxy resin insulation parts

Method used

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  • Extra-high voltage resistant insulating resin and preparation method thereof
  • Extra-high voltage resistant insulating resin and preparation method thereof

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preparation example Construction

[0032] In a first aspect, the present invention provides a method for preparing an ultra-high voltage insulating resin, the preparation method comprising the following steps:

[0033] (1) 40-68 parts by weight (for example, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 , 60, 61, 62, 63, 64, 65, 66, 67 or 68 parts by weight) of the matrix resin and 5 to 15 parts by weight (for example, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15 parts) toughening agent mixed, then inert gas (such as N 2 ) under the protection of 60 ~ 100 ℃ (such as 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃ or 100 ℃) stirring for 1 ~ 3h (such as 1, 1.5, 2, 2.5 or 3h) to obtain a toughened matrix resin; in the present invention, the mass ratio of the matrix resin to the toughening agent is (40-68): (5-15) (for example, 40:5, 40:6, 40 :7, 40:8, 40:9, 40:10, 40:11, 40:12, 40:13, 40:14, 40:15, 45:5, 45:6, 45:7, 45:8 , 45:9, 45:10, 45:11, 45:12, 45:13, 45:14, 45:15, 50:5, 50:6, 50...

Embodiment 1

[0070] Step 1: Preparation of toughened matrix resin

[0071] After mixing 50 parts of phenolic modified epoxy resin (bisphenol F type epoxy resin F-44) and 5 parts of toughener liquid polysulfide rubber (JLY-121 liquid polysulfide rubber), start stirring, and the stirring speed is 200r / min, at the same time, pass N 2 , heated to 80°C, and stirred for 2 hours; after stirring, a toughened matrix resin was obtained.

[0072] Step 2: Preparation of Ceramic Additive Dispersion

[0073] The boron nitride particles with an average particle size of 2 μm and ethanol were added to the ball mill in a mass ratio of 2:8, and the ball mill was carried out by a planetary ball mill. The speed of the ball mill was controlled at 400 rpm and the ball milling time was 15 hours. In the ceramic additive dispersion liquid, the mass percentage content of boron nitride particles in the ceramic additive dispersion liquid is 20% (corresponding to 10 parts of the ceramic additive).

[0074] Step 3: ...

Embodiment 2

[0082] Step 1: Preparation of toughened matrix resin

[0083] After mixing 68 parts of bisphenol F-type epoxy resin F-44 with 15 parts of toughener 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.

[0084] Step 2: Preparation of Ceramic Additive Dispersion

[0085] The boron nitride particles with an average particle size of 2 μm and ethanol were added to the ball mill in a mass ratio of 2:8, and the ball mill was carried out with a planetary ball mill. The speed of the ball mill was controlled at 400 rpm, and the ball milling time was 15 hours. In the ceramic additive dispersion, the mass percentage content of boron nitride particles in the ceramic additive dispersion is 20% (corresponding to 20 parts of the ceramic additive).

[0086] Step 3: Preparation of a mixture of ceramic additive dispersion, toughened m...

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Abstract

The invention relates to an extra-high voltage resistant insulating resin and a preparation method thereof. The method comprises the following steps: mixing 40-68 parts of matrix resin and 5-15 parts of a toughening agent, and stirring for 1-3 hours at 60-100 DEG C under the protection of inert gas to obtain toughened matrix resin; the preparation method comprises the following steps: carrying out ball milling on 10-35 parts of a ceramic additive and a solvent to obtain a ceramic additive dispersion liquid; stirring the ceramic additive dispersion liquid, toughened matrix resin, 10-25 parts of silane and 3-8 parts of a dispersing agent at room temperature for 2-3 hours to obtain a mixture; carrying out reduced pressure distillation on the mixture to remove the solvent, so as to obtain silane modified toughened matrix resin; and adding 0.5-3 parts of an accelerant into the silane modified toughened matrix resin, and uniformly stirring to obtain the extra-high voltage resistant insulating resin. The extra-high voltage resistant insulating resin prepared by the invention has excellent thermal properties, mechanical properties and electrical insulation properties.

Description

technical field [0001] The invention belongs to the technical field of insulating resins, and in particular relates to an ultra-high voltage resistant insulating resin and a preparation method thereof. Background technique [0002] Compared with ordinary high-voltage transmission, UHV transmission has the characteristics of extra-large transmission capacity, extra-long transmission distance, extra-low line loss, and extremely small corridor area. It is the main direction of development in the future transmission system. The insulating parts of UHV equipment play the role of electrical insulation and bearing capacity, and their performance will directly determine the insulation performance and operational reliability of power transmission and transformation equipment. As my country's power system develops in the direction of UHV, DC, and high-current transmission networks, higher requirements are placed on the performance of insulating parts, especially for AC UHV systems abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L81/04C08L9/00C08K3/38C08K5/5419C08K5/18C08K5/544C08K3/28
CPCC08L63/00C08K2003/385C08L81/04C08K3/38C08K5/5419C08K5/18C08K5/544C08L9/00C08K3/28
Inventor 叶金蕊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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