Preparation method of vacuum pressurized impregnating epoxy resin

A technology of vacuum pressure impregnation and epoxy resin, which is applied in the direction of chemical instruments and methods, plastic/resin/wax insulators, surface etching compositions, etc., and can solve problems such as toxicity to the human body and the environment, insulation damage, and restricted use. Achieve the effects of improving processability, reducing viscosity, and perfecting cross-linked structure

Inactive Publication Date: 2006-11-22
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are ① it needs to be stored separately in two components; ② it contains a large amount of highly toxic styrene, which is poisonous to the human body and the environment; ③ the relatively high high-temperature dielectric loss (about 6.5% / 1500C) limits its use in high-temperature motors, and at the same time There is also a hidden danger that long-term work will cause insulation damage

Method used

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  • Preparation method of vacuum pressurized impregnating epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: method (2)

[0019] 25g bisphenol A epoxy resin (brand name DER331, DOW Chemicals) and 25g cycloaliphatic epoxy resin (brand name EXL4201, Union Carbide Corporation) mixture are heated to 90 ℃ and stir evenly, add 1.0g maleic anhydride and 0.002g of Benzyldimethylamine, keep the reaction at 90°C for 3 hours, cool down to 60°C, add 10g of vinyltriethoxysilane, 0.05g of aluminum acetylacetonate and 0.025g of p-benzoquinone, stir and mix evenly, and then Cool to room temperature, add 50g of methyl hexahydrophthalic anhydride and mix evenly to obtain 110g of epoxy vacuum pressure impregnation resin, the properties of the cured product are shown in Table 1.

Embodiment 2

[0020] Embodiment 2: method (1)

[0021] Add 0.025g aluminum acetylacetonate and 0.0025g p-benzoquinone to 25g cycloaliphatic epoxy resin (brand name EXL4221, Union Carbide Corporation), heat to 60°C to dissolve completely, cool to 25°C, add 3.75g γ-glycidyl ether oxypropyl Diethoxymethyldiethoxysilane and 25g of methylhexahydrophthalic anhydride were thoroughly mixed to obtain 53.8g of epoxy vacuum pressure impregnation resin. The properties of the cured product are shown in Table 1.

Embodiment 3

[0022] Embodiment 3: method (1)

[0023] Add 0.005g chromium acetylacetonate and 0.0005g tert-butyl hydroquinone to 14g cycloaliphatic epoxy resin (brand name EXL4201, Union Carbide Corporation), heat to 60°C to dissolve completely, cool to 25°C, add 6g γ-glycidol Etheroxypropyltrimethoxysilane and 18g of methyltetrahydrophthalic anhydride were thoroughly mixed to obtain 38g of epoxy vacuum pressure impregnation resin. The properties of the cured product are shown in Table 1.

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Abstract

The invention discloses a preparing method of epoxy vacuum pressure immersion resin, which is characterized by the following: utilizing non-poisonous or little poisonous siloxane active diluent with multiple reactivity functional group to reduce the viscosity of epoxy resin; modifying manufacturing property and low-temperature stability; preparing heat-durability low-dielectric consumption product through auto-polymerization reaction of siloxane group and synergic action of reacting group, anhydrides hardener and hardening accelerating agent; fitting for immersing large-medium high-pressured motor line bar, stator coil and other electrical equipment parts without poison or high-volatile component.

Description

Technical field: [0001] The invention relates to a preparation method of an electrical insulating material, in particular to a preparation method of an epoxy vacuum pressure impregnation resin. Background technique: [0002] Vacuum pressure impregnation (V.P.I) technology is currently the most advanced and widely used insulation treatment technology in the world. It is widely used in the main insulation treatment of generators and motor coils. Among them, the vacuum pressure impregnation resin plays a decisive role in the insulation performance. Epoxy resin can be cured by an acid anhydride curing agent to form a cross-linked structure, which has good insulation properties, mechanical properties and high temperature resistance, so it is widely used in the research and production of impregnated resins. [0003] However, the epoxy resin itself has a high viscosity and cannot meet the requirements of the vacuum pressure impregnation process. It is necessary to add a diluent to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C09K13/00H01B3/40
Inventor 郑芸江平开韦平汪根林张军董月云
Owner SHANGHAI JIAO TONG UNIV
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