A kind of electric composite insulator repair adhesive and preparation method thereof

Abstract

The invention discloses a power composite insulator repair adhesive and a preparation method thereof, and relates to the technical field of adhesives. Power composite insulator repair glue, by weight, its raw materials include polysiloxane 80-200 parts, silane-modified polyether prepolymer 5-40 parts, white carbon black 2-30 parts, flame retardant 40-40 parts 280 parts, 5-30 parts of crosslinking agent, 10-50 parts of coupling agent and 0.1-3 parts of catalyst; preferably, polysiloxane is hydroxyl-terminated polydimethylsiloxane. The preparation method of the power composite insulator repair glue uses the above formula as the raw material, and the prepared repair glue has good weather resistance and good adhesion, can be quickly cured at low temperature, and is compatible with the composite insulator body material better.

Description

technical field [0001] The invention relates to the technical field of adhesives, and in particular to a repair adhesive for electric composite insulators and a preparation method thereof. Background technique [0002] The power industry is a major industry that involves the national economy and the people's livelihood, and the safe and stable operation of the power system is the basic guarantee for Guotai Minan. Insulators are key products used to improve the insulation stability of outdoor power transmission and transformation facilities. The composite insulators are composed of silicone rubber and fillers, with light weight and high dielectric strength, and are widely used in high-voltage power transmission. [0003] Composite insulators have long been subjected to ultraviolet aging, wind and sand wear, high and low temperature aging, and ablation aging of leakage current arcs due to long-term outdoor service, coupled with pollution in some industrial areas, acid rain in ...

AI Technical Summary

Problems solved by technology

This change of the shed leads to a great reduction in the electrical insulation performance of the insulator. Under the synergistic effect of the humidity of the harsh environment such as dense fog, rain, snow, and frost and the leakage current of the operating voltage, arc discharge is very easy to occur, resulting in pollution flashover accidents

At present, due to the short power outage time and complex replacement process, it is difficult to carry out the replacement and repair work of power composite insulators. Therefore, the easiest way to repair and repair is to use a glue with good compatibility and high dielectric strength. Bond the cracked sheds, seal the ablated potholes, and repair and renovate the chalked and cracked parts of the sheds, but there is no such special repair material on the market

[0004] The current existing products are relatively close to building sealants and structural sealants, but after all, building sealants are designed and developed in conjunction with the application of the construction industry, and many of their performance indicators are not suitable for repairing composite insulators, such as the fluidity of building adhesives. Not good, it is more difficult to operate for the repair process

In addition, most building sealants have no flame retardancy or low flame retardancy, which is a fatal shortcoming for electrical external insulation materials; again, the curing time of building sealants is usually longer, especially at low temperatures. , the curing time is longer, which is almost unworkable for insulator repairs with short power outages and high-altitude operations

Finally, the matrix resin used in construction adhesives has poor compatibility with composite insulator materials, which can easily cause stress concentration problems; although the bonding strength can be satisfied, the weather resistance is not good, and it is difficult to meet the working conditions of long-term outdoor service

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