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Flame-retardant resin pouring sealant for transformer and preparation method thereof

A technology of flame retardant resin and potting adhesive, which is applied in the direction of modified epoxy resin adhesives, adhesive additives, non-polymer adhesive additives, etc., and can solve the problem of settlement and quick solidification of flame retardant resin potting adhesive fillers Low stress and heat resistance, high coefficient of linear thermal expansion, etc., to achieve the effect of improving resistance to medium penetration, solvent resistance, high temperature resistance, and mechanical properties

Inactive Publication Date: 2020-05-12
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the epoxy resin material used for encapsulation, quick curing, low stress and heat resistance are also required. Most flame retardant resin potting compounds have filler settlement, high linear thermal expansion coefficient, poor mechanical properties and poor heat resistance. , Not resistant to solvents, not resistant to corrosion, etc.

Method used

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  • Flame-retardant resin pouring sealant for transformer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for preparing flame-retardant resin potting glue for transformers. The preparation method of the handicraft material includes the following processing steps: Step 1. Weigh 50 parts of phenol and 36 parts of solid formaldehyde into a reactor, and add 30 parts of xylene , Magnetic stirring at room temperature for 30 minutes, heating to 45°C, adding 2.8 parts of dipropyleneamine diluted with 5 parts of xylene dropwise with a constant pressure dropping funnel. After the dropwise addition, heating to 95°C, condensing and refluxing for 4 hours, and cooling to room temperature Stop the reaction. Extract with acetone, 0.1moL / L NaOH solution and saturated brine in turn, and finally remove the solvent by vacuum filtration to obtain a yellow viscous allyl benzoxazine monomer; step two, by weight, 138 parts of allyl benzoxazine monomer, 123 parts of o-aminostyrene, and 65 parts of solid formaldehyde were uniformly mixed and put into the reactor. After stirring at 100°C, the ...

Embodiment 2

[0018] A method for preparing a flame-retardant resin potting glue for a transformer. The preparation method of the handicraft material includes the following processing steps: Step 1. Weigh 47 parts of phenol and 36 parts of solid formaldehyde into a reactor, and add 20 parts of xylene , Magnetic stirring at room temperature for 20 minutes, heating to 40°C, adding 2.5 parts of dipropyleneamine diluted with 3 parts of xylene dropwise with a constant pressure dropping funnel. After the dropwise addition, heating to 90°C, condensing and refluxing for 3 hours, and cooling to room temperature Stop the reaction. Extract with acetone, 0.1moL / L NaOH solution and saturated brine in turn, and finally remove the solvent by vacuum filtration to obtain a yellow viscous allyl benzoxazine monomer; step two, by weight, 132 parts of allyl benzoxazine monomer, 117 parts of o-aminostyrene, and 60 parts of solid formaldehyde were uniformly mixed and put into the reactor. After stirring at 95°C, th...

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Abstract

The invention discloses a preparation method for a flame-retardant resin pouring sealant for a transformer, belonging to the technical field of high polymer materials. The flame-retardant resin pouring sealant for the transformer disclosed by the invention is prepared through the following steps: synthesizing a benzoxazine monomer, then preparing epoxy resin modified benzoxazine, and further preparing a benzoxazine type vinyl ester resin solution so as to obtain the flame-retardant resin pouring sealant for the transformer. The flame-retardant resin pouring sealant is free of corrosion to electrical elements, has good adhesion to a transformer shell made of rubber and plastic and a transformer shell made of metals like steel, aluminum, copper and tin; a cured pouring material can prevent an installed and debugged transformer from being influenced by vibration, corrosion, moisture, dust and the like; the flame-retardant resin pouring sealant has a flame retardant grade of V-0, and is wide in temperature resistance range and good in heat resistance; and the product has excellent water resistance, oil resistance, fatigue resistance, pressure resistance and vibration resistance, low hardness, moderate strength, good elasticity, excellent electrical insulation and yellowing resistance, does not harden over time, has good toughness, and is applicable to packaging protection of transformers.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing a flame-retardant resin potting glue for transformers. Background technique [0002] With the development of the electronics industry, the performance requirements for electronic components and their assembly parts are becoming more and more stringent. After curing, epoxy resin has good physical and mechanical properties, excellent bonding strength to the surface of metal and non-metal materials, good dielectric properties, low shrinkage, good product dimensional stability, and high hardness. Potting glue with epoxy resin as the main component can effectively improve the protection of electrical components from external shock and vibration, maintain the insulation performance of electrical components, improve the dust and moisture resistance of electrical components, and at the same time be low in price. Liquid acid anhydride as the curing agent of ep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J11/04C09J11/06
CPCC08K2003/2227C08K2003/323C08K2003/325C09J11/04C09J11/06C09J163/10C08K13/06C08K9/10C08K5/34928C08K3/22C08K3/32C08K5/14C08K5/0091
Inventor 李新满徐江林周艳霞
Owner TONGLING SANJIA TRANSFORMER
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