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Electrical insulation ultrahigh-voltage epoxy resin composition and preparation method thereof

An epoxy resin and electrical insulation technology, applied in the field of epoxy resin, can solve problems such as product cracking, affecting the service life of epoxy resin insulation parts, epoxy resin electrical aging resistance and breakdown strength reduction, and achieve vitrification Increased temperature, good insulation effect, effect of reducing stress cracking

Inactive Publication Date: 2020-12-11
SHANGHAI XIONGRUN RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 mechanical and thermal properties of the epoxy resin, but the electrical aging resistance and breakdown strength of the epoxy resin will be reduced, thus greatly increasing the risk of discharge breakdown and product cracking in the UHV electric field, seriously Affect the service life of epoxy resin insulation

Method used

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  • Electrical insulation ultrahigh-voltage epoxy resin composition and preparation method thereof
  • Electrical insulation ultrahigh-voltage epoxy resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An electrical insulating ultra-high voltage epoxy resin composition, comprising the following components in parts by weight: 100 parts of epoxy resin, 100 parts of curing agent, 20 parts of polysulfide rubber, 20 parts of urea melamine formaldehyde resin, and 20 parts of phenolic resin , 20 parts of isocyanate, 20 parts of polytetrafluoroethylene, 20 parts of inorganic nano-mixture, 10 parts of toughening agent.

[0019] The toughening agent is polyethersulfone.

[0020] The curing agent is an acid anhydride curing agent.

[0021] Inorganic nano-mixtures include porcelain powder and alumina.

[0022] The ratio of porcelain powder and alumina is 1:1.

[0023] The D50 particle size of the inorganic nano-mixture is 50nm.

[0024] A preparation method of an electrical insulation ultra-high voltage epoxy resin composition, comprising the following steps:

[0025] S1. Put the epoxy resin, polysulfide rubber, urea melamine formaldehyde resin, phenolic resin, isocyanate, po...

Embodiment 2

[0029] An electrical insulating ultra-high voltage epoxy resin composition, comprising the following components in parts by weight: 150 parts of epoxy resin, 100 parts of curing agent, 20 parts of polysulfide rubber, 25 parts of urea melamine formaldehyde resin, and 30 parts of phenolic resin , 35 parts of isocyanate, 40 parts of polytetrafluoroethylene, 25 parts of inorganic nano-mixture, 15 parts of toughening agent.

[0030] The toughening agent is a combination of polyethersulfone and polyimide, and the combination ratio is 1:1.

[0031] The curing agent is an acid anhydride curing agent.

[0032] Inorganic nano-mixtures include porcelain powder and alumina.

[0033] The ratio of porcelain powder and alumina is 1:2.

[0034] The D50 particle size of the inorganic nano-mixture is 75nm.

[0035] A preparation method of an electrical insulation ultra-high voltage epoxy resin composition, comprising the following steps:

[0036] S1. Put the epoxy resin, polysulfide rubber,...

Embodiment 3

[0040] An electrical insulation ultra-high voltage epoxy resin composition, comprising the following components in parts by weight: 200 parts of epoxy resin, 150 parts of curing agent, 40 parts of polysulfide rubber, 20 parts of urea melamine formaldehyde resin, 40 parts of phenolic resin , 20 parts of isocyanate, 40 parts of polytetrafluoroethylene, 30 parts of inorganic nano-mixture, 20 parts of toughening agent.

[0041] The toughening agent is polyimide.

[0042] The curing agent is an acid anhydride curing agent, which can be a single-component acid anhydride curing agent or a mixture of multi-component acid anhydride curing agents. A mixture of two or at least three kinds, the addition of the above-mentioned acid anhydrides can fully react the hydroxyl groups in the epoxy resin, increase the crosslinking degree of the epoxy resin, and improve the physical properties of the epoxy resin composition.

[0043] Inorganic nano-mixtures include porcelain powder and alumina.

...

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Abstract

The invention discloses an electrical insulation ultrahigh-voltage epoxy resin composition and a preparation method thereof, and belongs to the technical field of epoxy resin. The electrical insulation ultrahigh-voltage epoxy resin composition comprises the following components in parts by weight: 100-200 parts of epoxy resin, 100-200 parts of a curing agent, 20-40 parts of polysulfide rubber, 20-40 parts of urea melamine formaldehyde resin, 20-40 parts of phenolic resin, 20-40 parts of isocyanate, 20-40 parts of polytetrafluoroethylene, 20-30 parts of an inorganic nano mixture and 10-20 partsof a toughening agent. According to the invention, a good insulating effect can be achieved in ultrahigh-voltage electricity, and the modifier, the inorganic nano mixture and the like are added, so that the thermal decomposition temperature of the composite material is remarkably increased by adding the modifier, and the glass transition temperature of an epoxy resin matrix is greatly increased;the insulating property of the epoxy resin is further improved by selecting the components of the inorganic nano mixture, and meanwhile, the breakdown strength of the epoxy resin can be effectively improved, the dimensional stability is improved and the trend of stress cracking is reduced.

Description

technical field [0001] The invention relates to an electrical insulating ultra-high voltage epoxy resin composition and a preparation method thereof, belonging to the technical field of epoxy resins. Background technique [0002] In power transmission and transformation equipment such as transformers, switches, transformers, wall bushings, etc., insulating parts are widely used, especially epoxy insulating parts. These insulating parts play the role of electrical insulation and load bearing. Its performance will directly determine the insulation performance and operational reliability of power transmission and transformation equipment. With the development of my country's power system towards UHV, DC, and high-current transmission networks, higher requirements are placed on the performance of insulating parts, especially for DC UHV systems above 1100kV. Space charge accumulation must also be considered while improving insulation performance. question. [0003] The current e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/06C08L61/30C08L27/18C08L81/04C08L81/06C08L79/08C08K13/02C08K3/00C08K3/22C08K5/29
CPCC08K2003/2227C08K2201/005C08K2201/011C08L63/00C08L2201/08C08L2203/20C08L2205/02C08L2205/035C08L2205/06C08L61/06C08L61/30C08L27/18C08L81/04C08L81/06C08K13/02C08K3/00C08K3/22C08K5/29C08L79/08
Inventor 何愈何俊凌
Owner SHANGHAI XIONGRUN RESIN
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