Photoinitiators

 Ultraviolet curing technology (UV technology) is to add a UV photoinitiator (or photosensitizer) to a specially formulated system (called a photocuring system) to generate active free radicals or cations after absorbing ultraviolet rays (UV), thereby initiating polymerization, Cross-linking and grafting reactions, making it from liquid to solid technology. Photoinitiator for UV curing technology is an environmentally friendly and cost-effective option because there is no need to remove water at the end of the printing or coating process, and there is no need to capture or incinerate solvents.

 

UV curing materials are widely used in optical fiber cables (UV curing optical fiber coating materials), printed circuit boards (UV curing photoresists), home appliances (plastic coatings, metal coatings), automotive parts (transparent varnishes, repair paints, reflector lampshades etc.), printing packaging (UV curing inks), wooden furniture and flooring (UV curing coatings).

 

Types of Photoinitiators are compounds that generate free radicals upon exposure to ultraviolet light. They then react with monomers and/or oligomers, initiating the polymerization process. The radical photoinitiator is used extensively with crosslinkable monomers and oligomers in UV-curable inks and coatings, adhesives, and many other products.

 

Photoinitiators can be divided into two categories: free radical photoinitiators and cationic photoinitiators.

 

TINTOLL is one of the leading photoinitiator manufacturers and photoinitiator suppliers, which is also one of the cornerstone businesses of TINTOLL. Our product portfolio covers free radical and cationic photoinitiators (photo-acid generators) as well as amine synergists. UV-curable materials are widely used in graphic arts, industrial coatings, adhesives, printed circuit boards, and 3D printing. TINTOLL provides photoinitiator for UV curing application support, product development and custom solutions, and collaborates with customers to develop next-generation photoinitiators.

 

What Activates the Photoinitiator?

Photoinitiators are activated by absorbing energy from ultraviolet or visible light. This causes the visible light photoinitiators to decompose and form free radicals or protic acids.

 

The free radicals then react with monomers and oligomers to form new free radicals. These free radicals become part of the resulting polymer.

 

The polymeric photoinitiator is used in UV-curable inkjet formulations. They are designed to absorb light and convert light energy into chemical energy. The chemical energy of this stabilizer in polymer can initiate or catalyze the crosslinking process, which causes the ink to dry quickly.

 

Photoinitiators can be activated by adding photosensitizers. Types of photoinitiators including type i photoinitiator absorb incident light more efficiently and can use visible light to activate photoinitiators to generate free radicals.

 

For more information about specialty chemicals products, please feel free to contact us!



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