Hindered Amine Light Stabilizers (HALS) have attracted widespread attention since publication because of their excellent photostabilizing properties.

PU soft foam refers to flexible polyurethane with certain elasticity, commonly known as PU sponge/foam. This kind of foam plastic has good elasticity, generally has the properties of low density, good elastic recovery, sound absorption, heat preservation, etc.

With the continuous expansion of polymer material applications, low molecular weight HALS have been difficult to meet some high temperature processing environments and applications with high standards of material weathering because of the defects of easy migration, volatility, and intolerance of extraction.

Triazine UV absorber is a new type UV absorber developed in recent years. Thanks to its advantages of broad spectrum absorption, high efficiency, good heat resistance and dispersion, Triazines become the research and development hotspot in the field of UV absorbers.

Benzophenone UV absorbers have a wide UV absorption band (covering 290-400nm, mainly absorbing UVA), good compatibility with polymer materials and high safety. So it’s widely applied in plastics, inks, paints, cosmetics and other industries.

When plastics are exposed to sunlight for a long time, the strong UV rays of various bands will produce different degrees of damage to the bonds of polymer materials.

Under outdoor conditions, some coatings undergo light aging after long-term sunlight exposure in a few months or years, showing problems such as loss of gloss, color fading, chalking, cracking, and even peeling off the whole layer.

Polyurethane foam contains two kinds of materials, Soft foam and Rigid foam. Soft foam is open-cell structure, which mainly plays the role of cushioning. Hard foam is closed-cell structure, which has the function of heat preservation and waterproof.

Moderate amounts of UV light can promote mineral metabolism and vitamin D formation in human’s body, which is beneficial to our health. But long-term exposure to UV light will cause damage to the skin.