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What is the Insulation Varnish？

Insulating varnish, also called insulating coatings, is a kind of coating with excellent electrical insulation. It has good electrochemical properties, thermal properties, mechanical properties and chemical properties. Insulating varnish is an important insulating material based on high molecular polymer that can be cured into an insulating film or insulation under certain conditions.

Composition of insulating varnish

Insulating varnish is composed of base material, flame retardant, curing agent, pigment and filler, and solvent, etc.

Binder

The base material is composed of polyamide resin, polyesterimide resin, polyurethane, epoxy resin, bismaleimide resin, silicone resin and other resins

Flame retardant

Flame retardants are divided into reactive flame retardants and additive flame retardants; according to the composition can be divided into inorganic flame retardants and organic flame retardants

Pigment

The purpose of adding pigments and fillers to the varnish is to improve the performance of the properties and formulate it into the required color.

Hardener

Curing agent (or initiator) is an indispensable component of most insulating coatings. In flame-retardant coatings based on epoxy resin, curing agents such as amine adducts, acid derivatives, and synthetic resins must be added; in flame-retardant coatings based on vinyl resin, an appropriate amount should be added. Peroxide is used as the initiator.

Additives

Auxiliary agent is one of the indispensable components in the manufacture, storage, construction and performance improvement of insulating coatings, and is an auxiliary component of raw materials. It plays a special effect in the coating, and plays a very important role in the process and durability of the base material to form a coating film.

Solvent

Solvents are used as the vehicle for the manufacture of coatings, which can adjust the construction viscosity of the coatings to meet the construction performance. The solvent in the coating should not react with the coating components, that is, the solvent used should be relatively inert.

Impregnating varnish

Impregnating varnish is divided into two categories: solvent varnish and solvent-free varnish. It is mainly used to impregnate the coils of motors and electrical appliances to fill the gaps and micropores. After curing, it can form a continuous and smooth paint film on the surface of the impregnated object.

Make it bond into a hard whole. The basic requirements for impregnating paint are: