Application areas
It is used to make coatings, adhesives, plastics or tanning materials, and is used for anti-shrink and anti-wrinkle treatment of fabrics and papers.
Amino resin for coatings is a multi-functional compound. The compound containing (-NH2) functional group is added and condensed with aldehydes (mainly formaldehyde), and then the hydroxymethyl (-CH2OH) and aliphatic monohydric alcohol partial ethers are generated. The product obtained by etherification or total etherification. According to the different amino compounds used, it can be divided into four categories: urea-formaldehyde resin, melamine resin, benzinated melamine resin, and copolymer resin.
If amino resin is used alone as a paint film, the resulting paint film will be too hard, brittle, and has poor adhesion to the substrate. Therefore, it is usually used in combination with other types of resins that are compatible with amino resin and can be cross-linked by heating. It can be used as a cross-linking agent for oil-modified alkyd resin, saturated polyester resin, acrylic resin, epoxy resin, epoxy ester, etc. With such a match, a strong and tough paint film with a three-dimensional network structure can be obtained by heating. , depending on the changes in the amino resin used and other matching resins, the resulting paint films also have their own characteristics.
Paint films using amino resins as cross-linking agents have excellent gloss, color retention, hardness, chemical resistance, water resistance and weather resistance. Therefore, coatings using amino resins as cross-linking agents are widely used in automobiles and industrial applications. Industrial coatings for agricultural machinery, rigid furniture, household appliances and metal pre-coating. Amino resins can be baked at low temperatures or cured at room temperature in the presence of acid catalysts. This property can be used in reactive two-component wood coatings and automotive refinishing coatings.
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