At NINGBO INNO PHARMCHEM CO.,LTD., we are focused on delivering chemical solutions that overcome formulation challenges and drive industrial innovation. For UV curing applications, particularly those involving pigments, the choice of photoinitiator is critical. Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate, or TPO-L, stands out as a highly effective solution for these demanding scenarios.

Pigments, especially titanium dioxide commonly used in white and colored coatings and inks, can significantly hinder UV light penetration. This absorption and scattering effect can lead to incomplete surface cure and poor through-cure, compromising the overall performance and durability of the finished product. Traditional photoinitiators may struggle to efficiently initiate polymerization deep within the coating or ink layer.

TPO-L addresses this challenge head-on. As a Type I free radical photoinitiator, it possesses broad UV absorption characteristics that extend into longer wavelengths. This allows it to absorb UV light more effectively, even in the presence of pigments that would typically block shorter wavelengths. Consequently, TPO-L promotes deeper and more uniform curing throughout the entire film thickness.

The benefits of using TPO-L in pigmented systems are manifold:

  • Improved Through-Cure: Ensures that the entire layer of coating or ink solidifies properly, leading to enhanced mechanical properties and adhesion.
  • Enhanced Surface Cure: While excellent for through-cure, it also contributes to a tack-free surface, improving handling and stacking for printed materials.
  • Reduced Yellowing: Maintains the intended color of pigmented formulations, a crucial aspect for white and light-colored products.
  • Formulation Versatility: Its liquid form allows for easy integration into various UV-curable resin systems, including acrylates and unsaturated polyesters.

Manufacturers seeking to buy TPO-L for their pigmented coatings, inks, or other UV-curable applications are looking for a reliable initiator that can deliver consistent results. The availability of high-purity TPO-L from trusted sources like NINGBO INNO PHARMCHEM CO.,LTD. is essential for optimizing these challenging formulations.

In conclusion, TPO-L represents a significant advancement in photoinitiator technology, particularly for pigmented UV curing applications. Its ability to effectively initiate polymerization even in light-blocking systems makes it an invaluable component for achieving high-quality, durable, and aesthetically pleasing finishes.