Amino resins are an important class of thermosetting resins, which are formed by condensation of amino compounds and aldehydes (mainly formaldehyde). These resins usually need to be modified by alcohols in order to dissolve in organic solvents and have good miscibility and reactivity for application in coating preparation. Depending on the amino compounds used, amino resins can be divided into three categories: urea-formaldehyde resins, melamine formaldehyde resins and phenyl-melamine resins.

Classification of amino resins
Urea-formaldehyde resin

Urea-formaldehyde resin, also known as urea-formaldehyde resin (UF), is a polymer derived from the reaction of urea and formaldehyde. In the process of processing and molding, these resins will be cross-linked to form an insoluble and non-melting thermosetting resin. After curing, the urea formaldehyde resin is translucent, light color, with weak acid, weak alkali resistance, excellent insulation performance, wear resistance is very high, and the price is more economical. However, urea-formaldehyde resins are susceptible to strong acids and bases, have poor weather resistance, and are not suitable for long-term exposure to harsh environments. This resin is often used for the preparation of water-soluble resins, and it is easy to cure under neutral conditions, and the cured resin is non-toxic, colorless, and has good light resistance and thermoforming properties.

The types of amino resins and their application in the field of coatings are described in detail

Melamine formaldehyde resin

Melamine formaldehyde resin, also known as melamine formaldehyde resin (MF), is a polymer prepared by the reaction of melamine with formaldehyde. These resins are cross-linked during processing and molding to form an insoluble and non-melting thermosetting resin. After curing, the melamine formaldehyde resin is colorless and transparent, has good stability, can remain stable in boiling water, and can even be used under conditions of up to 150 degrees Celsius. It also has self-extinguishing, arc resistance and good mechanical properties.

Benzene melamine resin

Benzene-melamine resin is a resin prepared by introducing phenyl substituents into melamine molecules. It is similar in nature to melamine, with alkalinity and addition to formaldehyde. These resins after methyl ether or butyl ether treatment, can be used with alkyd resin, acrylic resin, etc., as a crosslinking agent for thermosetting coatings. In different processing methods, they can be used in thermosetting coatings, color paints and other fields.

The types of amino resins and their application in the field of coatings are described in detail

Application of amino resin in coating field
Amino resins are widely used in the field of coatings. They are usually compatible with other resins and can be cross-linked with different types of resins by heating, thus improving the performance of the paint. Amino resin paint can be used in automobile, steel furniture, household appliances, metal coating and many other applications. The characteristics of these paints include light color, high gloss, high hardness, good electrical insulation, good aging resistance, fast drying speed, etc., which makes them very popular in industrial production.

In general, amino resins are a class of versatile thermosetting resins that play an important role in the coating and coating industry. By adjusting different types of amino resins and the ratio with other resins, a variety of performance requirements can be achieved to meet the needs of different fields. With the continuous development of science and technology, amino resins and their application areas will continue to expand, providing more innovations and solutions for various industrial applications.