PU synthetic leather is a type of artificial leather made from polyurethane resin coating and non-woven or woven fabric base material. Due to its smooth surface, light weight, good breathability, and wear resistance, it is widely used in sports equipment, shoes, clothing, and other fields.

Compared to other elastomers and rubber materials, polyurethane elastomers offer advantages such as lightweight, wear resistance, oil resistance, aesthetic appeal, and comfort, along with ease of manufacturing and processing. They are widely used in automotive interiors, footwear elastomers, electronics, electrical appliances, and medical fields.

Yellowing (discoloration) of plastic products is primarily caused by material aging or degradation, a common issue in plastic products. Factors such as raw material quality, formulation, production processes, and improper storage conditions can all contribute to this phenomenon. Yellowing is a visible sign of material aging, mainly triggered by oxidation reactions, UV exposure, high temperatures, and improper processing/storage, leading to changes in polymer structure.

OMNISTAB UVP is a cost-effective UV absorber with a broad UV absorption range, capable of absorbing UV light in the 300–400 nm range, including both UVA and UVB wavelengths. Additionally, OMNISTAB UVP absorbs virtually no visible light above 400 nm, meaning it has minimal impact on the color of the finished product. So it performs well in light-colored transparent products.

OMNISTAB AO-80 is a member of the gas-fume resistant anti-yellowing antioxidant family. Its exceptional anti-aging performance and color stability stem from its unique molecular structure!

Light-colored plastic products in the production and processing and use of the process, when subjected to light, heat, oxygen, chemical erosion, moisture and other influences, it is very easy to occur yellowing and discoloration problems.

The oxidation process of polymers is a free radical chain reaction. Plastic antioxidants can capture active free radicals, generate inactive free radicals, or decompose the polymer hydroperoxides produced during the oxidation process, terminate the chain reaction, delay the oxidation process of the polymer, thus enabling the polymer to be processed smoothly and extending its service life.

Omnistab®Antioxidant AN6133 exhibits excellent performance in various materials, especially in the field of polyurethane flexible foams,

Gas exposure yellowing‌ refers to the yellowing phenomenon that occurs in materials due to gas exposure in a specific environment. Phenolic antioxidants such as BHT undergo a chemical reaction when in contact with nitrogen oxides (NOx) to form 2, 6-di-tert-butyl-p-nitrophenol (DTNP).