中固化学® TPO is a highly efficient free radical (I) type, highly efficient photoinitiator. Because of its wide absorption range, its effective absorption peak is 350-400nm, and it absorbs to about 420nm. Its absorption peak is longer than that of conventional initiators, and two free radicals, benzoyl and phosphoryl, can be generated after exposure to light. Both can initiate polymerization, so the photocuring speed is fast. It also has photobleaching effect. It is suitable for thick film deep curing and the coating does not turn yellow. It has low volatility and is suitable for water-based system.
中固化学® TPO
Chemical Name: 2,4,6-三甲基苯甲酰基二苯基氧化膦 (TPO)
Synonym: Speedcure TPO;Irgacure TPO;中固化学 TPO;Darocure TPO;Genocure TPO;Chivacure TPO;JRCure TPO;Lucirin TPO;Photocure TPO; TPO Photoinitiator
CAS No: 75980-60-8
Molecular Formula: C22H21O2P
Molecular Weight:348.37
Molecular Structure:

| Item | Specifications |
| Appearance | Yellowish green crystal |
| Assay | ≥99.0% |
| Melting Point | 91.0~95.0℃ |
| Loss on Drying | ≤0.2% |
| Ash | ≤0.1% |
| Acidity value | ≤0.5mgKOH/g |
Photoinitiators, mainly used for screen printing inks, lithographic printing inks, flexo printing inks, wood coatings
20kg/carton.
Being kept in dry, clean warehouse with well ventilation.
Avoid exposing to light and heating.
运输过程中防止泄漏、雨淋和曝晒。