As society evolves, humanity’s awareness of protecting the environment continues to grow. For the motor industry, this has led to increasingly stringent requirements and regulations—particularly in areas like hygiene, environmental sustainability, and workplace safety. Consequently, companies are strengthening their commitment to green production practices. Notably, motor buyers from Western countries such as the United States, Japan, and the European Union have already explicitly demanded that suppliers use environmentally friendly insulation coatings. In response, the development and implementation of eco-friendly solutions have become more critical than ever. Water-based Insulating Coating It is absolutely essential—uncleaned water-soluble insulating varnish can lead to electrical leakage, and even cause equipment damage. Thorough drying is crucial to ensure proper insulation performance.

Precautions for using water-based insulating paint:

　　1. The viscosity of the paint must meet the specified requirements, as different motor models and specifications have varying viscosity demands. Therefore, it’s necessary to verify and determine the exact process parameters accordingly.

　　2. The kiln's exhaust vents must be kept clear to ensure that water vapor can escape promptly, allowing the paint film to dry and cure thoroughly.

　　3. The drying temperature should be above 120°C; the larger the motor and the more complex its structure, the longer the drying time will be.

　　Currently, traditional solvent-based insulating varnishes used by motor manufacturers across China contain high levels of flammable, explosive, and toxic solvents such as benzene, ketones, and esters. After application, these varnishes release significant amounts of harmful substances, posing risks to human health and contributing to environmental pollution. As a result, they are gradually being replaced by waterborne insulating varnishes. To reduce organic solvent emissions and meet the nation’s stringent low-VOC environmental standards, many domestic institutions have recently focused on developing water-based insulating varnishes. These varnishes typically consist of a base resin, flame retardant, curing agent, pigments/fillers, and a solvent component.

　　Water-based insulating paint refers to insulating paint that uses water as its primary solvent, and it is categorized into water-soluble and water-emulsion types. The main issues associated with water-based insulating paint include:

　　1. As the main component of water-based insulating coatings, the water-based polymer itself must contain a high concentration of polar and ionic groups—or rely on the emulsifying effect of these groups—to dissolve or disperse effectively in water. During the curing process of the insulating coating, these functional groups should be minimized to a very low level; otherwise, hydrolysis in humid environments could severely compromise the coating's insulation properties and anti-mold performance.

　　2. Water or ionic groups often cause corrosion in alloys, which can damage the insulation treatment applied to alloy-containing components. While properly implementing anti-flashover technology can mitigate the corrosive effects of water-based insulating coatings on alloy parts to some extent, it may also slightly reduce the insulation performance of the cured product.

　　3. It must possess adequate mechanical strength, especially at high temperatures, while still maintaining a certain level of bonding integrity. Otherwise, under the combined influence of electromagnetic forces and mechanical stress, the windings could loosen or deform, potentially leading to accidents. However, water-soluble insulating varnishes typically struggle to achieve both excellent mechanical strength and strong adhesion.