Author: Li Xinxin
What happens when amino resin and alkyd resin are baked together?
under the condition of heating and baking, amino resin can be further polycondensated and cross-linked to form a film, but this film is very brittle and has weak adhesion, which is not suitable for general coatings.
Only when it is mixed with other resins can a coating with excellent performance be prepared.
Although amino resin can be used as a cross-linking agent and can be used together with alkyd polyester resin, acrylic resin, epoxy resin, silicone resin and polyurethane resin, the former two types of coatings have the largest application, so here we only discuss amino alkyd resin drying coatings.
In the process of heating and baking amino resin and alkyd resin together, hydroxyl groups in alkyd polyester resin cross-link with hydroxyl groups and hydroxymethyl groups in amino resin, so that the coating film forms a complex network polymer during drying.
The coating film has good mechanical properties, hardness, adhesion and water resistance.
This is the most widely used industrial paint at present, and amino alkyd baking paint is often used to protect and decorate metal products that can be baked.
Especially in light industrial products that require high decoration, it is more common. Because compared with ordinary dry paint at room temperature, baking paint not only greatly improves the quality and performance of paint film, but also can be used for assembly line construction, reducing the site area, speeding up the turnover of workpieces and improving the construction efficiency. If it is combined with new technology such as electrostatic spraying, it can greatly improve the mechanization of construction and improve the working conditions of workers.
Therefore, amino alkyd baking paint is widely used in automobiles, bicycles, sewing machines, electric fans, clocks, thermos bottles, toys, motors, electrical appliances, meters, instruments, hardware parts, stationery, metal products and so on.