Amino resin paint (code A) is a baked and dried film-forming paint with excellent performance made of amino resin and alkyd resin as the main film-forming substance , which occupies a large proportion in synthetic resin paint. There are three resincommonly used . The coating film obtained by heating and curing the amino resin alone is hard and brittle, and has poor adhesion. Therefore, the amino resin generally combined with a matrix resin such as alkyd resin, polyester resin, etc. to form an amino resin coating. The amino resin in the amino resin paint is used as a crosslinking agent to improve the hardness, gloss, chemical resistance and , and the matrix resin overcomes the brittleness of the amino resin and improves the adhesion. Amino resins and alkyd resins undergo intermolecular cross-linking reactions after baking at a lower temperature for a short time, forming a three-dimensional network macromolecular structure coating. Its main performance embodies the characteristics of alkyd resin and amino resin.
There are many types of alkyd resins commonly used in amino alkyd baking varnishes, most of which use short oil resins. The specification type of alkyd resin and the ratio of resin will affect the performance of amino alkyd baking varnish.
Amino resin varnish has light color and high gloss. When used as a varnish, it will not affect the vividness has high hardness and good electrical insulation. The color paint has a plump appearance, bright colors, excellent , good aging resistance, wear resistance and durability, good chemical resistance, and is not easy to burn. It is used together with phosphating primer, epoxy primer or phosphating substrate, and various electrophoretic primers to meet the "three defenses" requirements of anti-salt spray, anti-humidity, and anti-mildew (additional anti-fungal agent), and meets the requirements of Requirements for paints used in humid tropics. It is widely used in mid-level cars, buses, trucks, bicycles, sewing machines, thermos bottles, household appliances, instruments, hardware tools and machine tools, etc. In order to save energy consumption, amino resin coatings are being developed in the direction of low-temperature drying and quick drying.
