The Manufacturing Method of Glow-in-the-Dark Paint

Night-lit paint is produced through a series of processes involving luminescent pigments, organic resins, organic solvents, and additives. The performance of night-lit paint is determined by its components, and the selection criteria for these components are crucial.

1. Selection of Resin and Varnish: A) After the luminescent paint forms a film, the particles of luminescent pigments achieve the light absorption function. Due to the light transmission requirement, the resin bonding the luminescent color material should have good transparency and no covering power. The luminescent paint is semi-transparent, and the resin color affects its brightness. Therefore, the principles for selecting resin and varnish are colorless or light-colored with good transparency. B) The luminescent pigment is weakly alkaline, so the selected resin should be neutral or weakly acidic. C) Resin or varnish options include: epoxy resin (E440), polyurethane resin (or varnish), amino varnish, polyester resin (or varnish), acrylic resin (or varnish), hydroxy acrylic resin, acrylic polyurethane varnish (two-component), alkyd varnish, fluoropolymer resin, etc.

2. Selection of Luminescent Pigments: The luminescent pigments produced by our company are classified into grades B, C, D, E, F, etc., based on particle size, and can be widely used in coatings. However, due to the limitations of other properties in oil-based coatings, the particle size for application in coatings should be small.

3. The selection of additives for luminescent paint primarily consists of dispersants and anti-settling agents. Dispersant: Xylene solution of methyl silicone oil, concentration at 1%. Anti-settling agent: Aerosil. If different anti-settling agents are used on-site, that is acceptable

4. Usage of luminous pigment: The amount of luminous pigment can be selected based on the desired brightness and duration. The recommended ratio is 15-50% (by weight), with 30% being the ideal proportion.

5. Preparation of Luminescent Paint a) Container Selection: Choose glass, ceramic, enamel-lined, or plastic containers. b) Production Process: Luminescent pigments must not be ground. Luminescent paint cannot be prepared using a three-roll mill or grinding machine; it must be mixed with a high-speed disperser or mixer. Luminescent pigments can also be manually dispersed in the paint. The specific method involves placing the resin or varnish in a container, adding additives, and starting the stirring process. While stirring, gradually introduce defoamers and luminescent pigments (note: maintain a slow rotation speed). After adding the luminescent pigments, increase the speed until the pigments are evenly distributed in the paint. Filter the luminescent varnish.