Among the components of UV-curable coatings and the composition of UV inks, the components of light-curing resin can be found. It is the main composition of light-curing products (UV coatings, UV inks, UV adhesives, etc.), and its properties Basically determines the main properties of the cured material. After having a certain understanding of UV coatings and UV inks, let's study the characteristics of light-curable resins.

　　What is the so-called light-curing resin? It is a relatively low molecular weight photosensitive resin with a group that can undergo photo-curing reactions, such as various types of unsaturated double bonds or epoxy groups. At present, domestic light-curing resins mainly include epoxy acrylate, urethane acrylic resin, polyester acrylic resin, amino acrylic resin, and photo-imaging alkali-soluble resin. Let's take a look at their respective application characteristics.

　　1.Epoxy acrylate

　　Is currently the most widely used, the largest amount of light curing resin. Epoxy-acrylic resin is widely used as an epoxy acrylic resin because of its simple synthetic process, convenient source of raw materials, and low price. It has fast light curing speed, high hardness, high gloss, and excellent chemical resistance. The main resin for light-curing paper, wood, plastic and metal coatings, light-curing inks, and light-curing adhesives.

　　2, polyurethane acrylic

　　The main varieties of polyurethane acrylic resins are aromatic and aliphatic polyurethane acrylic resins. Due to their better comprehensive properties, such as UV-curable films, they have excellent abrasion resistance and flexibility, good chemical resistance, and impact resistance. And electrical properties, good adhesion to plastics and other substrates, etc., so it is widely used in ultraviolet light curing paper, wood, plastic and metal coatings and light curing inks, light curing adhesives.

　　3.Polyester acrylic resin

　　It is also a more commonly used light-curing resin. Because the resin has low odor, low irritation, good flexibility and pigment wettability, epoxy acrylic resin and urethane acrylic resin are often used in light curing color paints and light curing inks.

　　4, amino acrylic resin

　　Because the resin has good heat resistance and weather resistance after curing, good chemical resistance, high hardness and other characteristics, it is often combined with epoxy acrylic resin and urethane acrylic resin for light curing coatings and inks.

　　5, photo-imaging alkali-soluble resin

　　It is a resin specially used for photo-imaging liquid resist ink and photo-imaging liquid solder resist ink. It contains carboxyl group and can be developed with alkaline water for imaging. The cured film has excellent electrical properties, chemical resistance and heat resistance. The main varieties are maleic anhydride copolymers and anhydride-modified epoxy acrylic resins.

　　From the analysis of the above UV-curable resin materials, it can be found that they all have their own characteristics. In general, in order to better exert their functions, they are used in conjunction with each other to achieve the best results. For example, polyester acrylic resin combined with epoxy acrylic resin and urethane acrylic resin is used in light-curing paints and light-curing inks. It has good resistance in flexibility and has high gloss and fast curing effects.