Tinuvin® 479 by BASF is a highly effective hydroxyphenyl-triazine (HPT) UV absorber. Here is its detailed introduction:

Performance Features:

High Extinction Coefficient: It has an extremely high extinction coefficient in the UV-B and UV-A range. This means it can efficiently absorb a large amount of ultraviolet light, providing excellent protection for the coated materials against the harmful effects of UV radiation. As a result, it helps to prevent degradation, fading, and embrittlement of the materials, significantly enhancing their durability and lifespan.

Low Volatility and Migration: It shows low volatility and low migration properties. This ensures that the UV absorber remains in the coating system for a long time, continuously providing UV protection without evaporating or migrating out of the coating, thereby maintaining the long-term stability and effectiveness of the coating.

Excellent Photo-Permanence: It has excellent photo-permanence, which means it can maintain its UV absorption performance even after long-term exposure to light. This is crucial for coatings that are constantly exposed to sunlight or other light sources, as it ensures the continuous protection of the materials.

Application Areas:

Automotive Industry: It is designed to fulfill the high-performance and durability needs for automotive finishes, both in original equipment manufacturer (OEM) and refinish systems. It helps to protect the automotive coatings from UV damage, maintaining the appearance and performance of the vehicles.

Industrial Coatings: It is also widely used in industrial coatings where long-life performance is essential. For example, it can be used in coatings for machinery, equipment, and industrial structures to provide UV protection and enhance the durability of the coatings.

UV Curing Coatings: Due to its compatibility with the newest generation photoinitiators, it is an excellent choice for UV curing coatings. It can enhance the UV resistance of the cured coatings and improve the overall performance of the UV curing process.

Compatibility and Formulation: It has been developed as an interaction-free UV absorber, which means it can be used in amine and/or metal catalyzed coating systems or in coatings applied on base coats containing such catalysts without causing any adverse interactions. Its high compatibility allows for easy incorporation into different coating formulations.

In summary, Tinuvin® 479 is a high-performance UV absorber that offers excellent UV protection, low volatility, and good compatibility, making it a valuable additive for various coating applications where long-term durability and UV resistance are required.