Enameled Wire Coating for High Power Transformers

2024-05-07 14:31:52

Enameled Wire Coating for High Power Transformers

Enameled wire paint for high power transformer, including the following raw materials by weight: 50 parts of ethoxyethylene urea methacrylate, 28 parts of polyethylene glycol diacrylate, 8 parts of hydroxyethyl methacrylate, 4 parts of anhydride curing agent, 4 parts of special Rilanit. 1.5 parts, sodium polyacrylate 4 parts, ternary polycarboxylic acid 4 parts, chlorinated aliphatic hydrocarbons 1 part, premix 25 parts, dual solvent 30 parts, leveling agent 1.5 parts, initiator 0.5 parts, crosslinking agent 0.6 parts, dispersant 1 part;
Wherein the mixture of calcium nanocarbonate calcium powder, sodium bentonite, and magnesium oxide is mixed at a weight ratio of 7:3:1;
Wherein the bisolvent is a mixture of methyl isobutyl ketone (MIBK), butyl acetate, and L-phenylalanine mixed in a weight ratio of 9:4.5:1.

Among them, the composite mixture before use, under vacuum conditions at a temperature of 80 ° C for 2.5 drying treatment when completed small After grinding particle diameter of 20-400nm; anhydride curing agent for phthalic anhydride; leveling agent for acrylic tree. The grease is mixed with polymethylphenylsiloxane in the ratio of 1:3 by weight; the initiator is potassium persulfate; the cross-linking agent is N-hydroxymethacrylamide; the dispersant is oleylamine acetate.

Among them, the preparation method is as follows: temperature 50 ℃, high-speed dispersion at 3400 rpm, and then added to the pulverizer and crushed to a particle size of less than 20 μm, which is the final product.

It was tested to have a water absorption rate of 0.65% and an impact resistance of 53.8 kgcm, at a temperature of 300°C. Its preservation rate of impact resistance reached 98.6% at 12 times of application.