The outstanding characteristics of Photoinitiator TPO are its wide absorption wavelength range and long shift, which enables it to effectively absorb long-wave ultraviolet (UVA) light and match the mainstream UV-LED light source. This makes it particularly effective in modern environment-friendly and energy-saving UV-LED curing system.
The main product characteristics as below
Excellent antioxidant polymerization resistance
The photolysis speed is fast, generating high concentrations of free radicals that can effectively consume surface oxygen, significantly reducing oxygen inhibition, and achieving complete curing of the coating surface with high hardness and non stick properties.
Low yellowing
Its photolysis products are relatively simple and not easily formed into chromophores. As a type I initiator, it can efficiently trigger without the need for amine coordination, avoiding the yellowing and odor problems caused by amines. After curing, the color of the film layer is pure, with a low initial yellowing index, and its absorption peak will shift blue and weaken during the curing process (photobleaching), making it particularly suitable for applications that require extremely high color and transparency
Application
Adhesives and Electronic Materials
Used for touch screen optical adhesive and high-performance pressure-sensitive adhesive, its low yellowing and low migration characteristics are beneficial for maintaining long-term reliability.
Ink
Flexographic printing, screen printing ink, especially suitable for high coverage white ink and color ink. It is strictly prohibited to use it for food packaging printing.
High-end wood coatings
Wood coatings (high-end furniture, flooring), plastic coatings (automotive components, consumer electronics casings), and metal coatings, utilizing their deep curing and low yellowing advantages.
Package & Storage
Package
20kg box or 25kg drum, or requirement of clients
Storage
It must be sealed and stored in the dark under the protection of inert gas (such as nitrogen).
Stored in a cool and dry place, keep temperature under 10 °C.
FAQ
Q: How does Photoinitiator TPO solve the problem of incomplete curing of thick coatings or colored systems?
A: The long-wave ultraviolet light absorbed by it has stronger penetration, which can be absorbed deep inside the material and produce active free radicals, so as to trigger deep polymerization reaction and ensure that both thick film and pigment-containing system can be completely cured.
Q: How does it perform in high temperature and humidity?
A: The cured material has high crosslinking density and dense structure, showing excellent resistance to damp and thermal aging, and can maintain mechanical properties and appearance stability for a long time. It is suitable for outdoor and harsh environment applications.
Q: What are the main benefits of its high reactivity in terms of production process?
A: The extremely high photo-initiation activity means that the exposure time is very short, which can greatly improve the speed of the production line and reduce the energy consumption per unit product. It is especially suitable for high-speed roll-to-roll printing or coating process.
Product Specification
Melting point: 88-92℃
λ max: near 267 nm, 298 nm, and 380 nm
Solubility: Has good solubility in most organic solvents, especially in medium polar solvents such as methanol, ethanol, acetone, and ethyl acetate. Insoluble in water.
Typical addition amount: 0.5% -5.0% of the total formula amount (adjusted according to the system)