Function of Fluorescent Whitener in Paint

The function of fluorescent whitening agent in paint is to improve the whiteness or brightness of the product and the appearance and performance of the product.

With the improvement of people's living standards and the progress of science and technology, the role of paints, such as white amino baking paint, polyurethane paint, alkyd paint and so on, is no longer simply to protect the surface of painted objects, but also to beautify the surface of paints, giving people a sense of beauty. Many transparent or white paints have an inherent yellow tone. In the past, in order to obtain a white or light appearance, light transparent matrix and stable and high whiteness white pigments were selected as far as possible. In addition, a certain amount of blue pigments, called "blue-up", were usually added to white paints, which increased the paint by using the complementary effect of blue and paint yellow. Whiteness, but this kind of white brightness is not high, a little gray.

As a fluorescent dye, fluorescent whitening agent has been widely used in white or light-colored paints. It can absorb ultraviolet light and emit blue-purple fluorescence, thus mixing with the yellow light on the surface of the paint film and turning it into white light, which makes the surface of the paint tend to be totally reflective, and makes the white paint look more white and bright in human vision; the light-colored paint looks more brilliant and tremendous. The appearance of the product was improved. Another use of fluorescent whitening agent in paint is to use it to absorb ultraviolet light and emit blue-purple fluorescence. It can improve whiteness of white paint or brightness of light paint, at the same time, reduce the damage of ultraviolet to paint, improve the light resistance of paint, and prolong the service life of paint in outdoor and sunlight environment.