Achieving effective UV curing in thick films presents a unique set of challenges for formulators. Ensuring that UV light penetrates deeply enough to initiate polymerization throughout the entire layer, while also maintaining surface cure, requires specialized components. NINGBO INNO PHARMCHEM CO.,LTD. offers TPO-L, a Type I photoinitiator that excels in these demanding thick film applications.

TPO-L, chemically known as Ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate, is a liquid photoinitiator that is highly effective in initiating the free radical polymerization process. Its efficacy in thick film curing stems from several key attributes. Firstly, its absorption characteristics allow for significant UV light penetration, reaching deeper into the coating layer compared to some other photoinitiators with higher surface absorption. This ensures that the entire film undergoes polymerization, preventing uncured layers beneath the surface.

Secondly, TPO-L provides a good balance between surface cure and through-cure. While many photoinitiators might favor one over the other, TPO-L helps achieve a robust cure across the entire film thickness. This dual capability is critical for applications where both the surface properties (like scratch resistance) and the bulk properties (like adhesion and flexibility) are important.

The benefits of TPO-L in thick film applications are evident across various industries. In printing, for instance, certain types of inks require a thicker deposit for opacity or special effects, and TPO-L ensures these layers cure properly. In coatings, applications like protective layers on industrial equipment or decorative finishes that require a substantial build-up can significantly benefit from TPO-L’s capabilities. Its use in white systems is particularly noteworthy, as pigments can scatter UV light, making deep curing more challenging; TPO-L’s efficient radical generation helps overcome this obstacle.

NINGBO INNO PHARMCHEM CO.,LTD. is a trusted supplier of TPO-L, providing manufacturers with a reliable ingredient to enhance their thick film UV curing processes. By incorporating TPO-L, formulators can achieve faster cure times, improved mechanical properties, and consistent quality, even in challenging high-build applications. This contributes to greater efficiency in production and higher performance standards for the end products.

As UV curing technology continues to be adopted for increasingly complex applications, the demand for photoinitiators like TPO-L that can handle thick film requirements will persist. We are committed to supporting our clients with the essential chemical building blocks that enable innovation and superior performance in their respective fields.