What is water-based insulating paint?
Water-based insulating paint refers to insulating paint that uses water as a solvent and is a new alternative to solvent-based insulating paint.Compared with traditional solvent-based insulating paints, water-based insulating paints do not use solvents that are toxic, harmful and pollute the environment, such as alcohol, so they are more environmentally friendly and can ensure the health of relevant construction personnel. It is an environmentally friendly, low-odor insulating coating with wide application prospects.
1. Classification of water-based insulating paints
Water-based insulating paint is divided into alkyd resin type water-based insulating paint, water-based polyurethane insulating paint, water-based epoxy insulating paint and water-based polyimide insulating paint and other types.Various types of water-based insulating paints have different product characteristics, so they are suitable for insulation applications of different products.
Alkyd resin type water-based insulating paint, because the heat resistance of alkyd is not high and the breakdown voltage is not strong, it is mainly used in the insulation treatment of small and medium-sized low-voltage motors, small transformers, etc.
The electrical insulation properties of water-based polyester insulating paint are better than that of alkyd resin type water-based insulating paint, and can be used as F-grade water-based insulating paint.
Water-based epoxy insulating paint.Epoxy resin paint has excellent mechanical strength and electrical properties, chemical resistance, good moisture resistance, small shrinkage, and good adhesion and compatibility with other materials, but the price is high.This kind of insulating paint not only has good performance, but also is safe and environmentally friendly, and the comprehensive cost is low. The overall performance can meet the requirements of F-class insulating paint, which is more in line with the insulation performance requirements of small and medium-sized motors.
Water-based polyimide insulating paint.A high-performance polymer with excellent thermal stability, outstanding mechanical properties and good electrical properties.
2. What are the advantages of water-based insulating paint?
Low viscosity and good permeability: The viscosity of water-based insulating paint is low, which is conducive to impregnation and penetration into the coils of electronic products such as motors and transformers, and the filling performance is better, which can reduce or eliminate the noise generated when electrical appliances such as motors or transformers are running.
Environmentally friendly, non-toxic and low odor: water-based insulating paint uses water as the solvent and does not contain toxic and harmful volatiles. When customers actually use it, they can add an appropriate proportion of water to dilute it according to the needs of the product, and the cost is lower.
The heat dissipation performance is better; after dipping into the film, the film on the surface of the winding is thinner than that of solvent-based insulating paint, which is more conducive to the heat dissipation in the use of related products.
Better high temperature resistance: Water-based insulating paint has good high temperature resistance. After testing, the surface of the film is not sticky at 170℃, and the temperature resistance is above 240℃.
3. What are the disadvantages of water-based insulating paint?
Water-based insulating paint uses water as the solvent. Although it has many advantages, there are many things to pay attention to.Undyed water-based insulating paint may cause leakage of the product and damage to the product, so it must be completely dried to achieve the purpose of insulation.
The viscosity of water-based insulating paint must meet the requirements. Different sizes, motors and transformers of different specifications have different viscosity requirements for insulating paint. Therefore, during use, it is necessary to pass tests to verify to determine the relevant viscosity parameters of insulating paint.
When the curing drying box of water-based insulating paint is drying, it is necessary to ensure that the air outlet and exhaust are unobstructed to ensure that the water and gas can be discharged in time to make the paint film more fully dry and cured.At the same time, the drying temperature of the oven should be above 120℃. The larger the motor, the more complex the structure, and the longer the drying time.After drying, the voltage resistance and insulation properties of the product should be checked to check whether the product is dry.
Water-based insulating paint cannot be mixed with solvent-based insulating paint, otherwise it may become milky white and the insulating paint will precipitate.