Photoinitiator ITX

Photoinitiator ITX is an efficient free radical photoinitiator. When combined with tertiary amine co-initiators and used together, it forms radical complexes that undergo electron transfer, initiating highly reactive amine alkyl free radicals. It also forms sulfur-containing anthraquinone initiators that have no initiating activity and polymerize low polymers and diluents for cross-linking. The sulfur-containing anthraquinone has multiple hydrophilic functional groups and is easily soluble in aqueous systems. It is often used in combination with tertiary amine enhancers such as EDB and cationic photoinitiators, and has a photoinitiating agent effect. It is suitable for varnishes, inks, coatings, adhesives.

Compared with traditional initiators, ITX offers enhanced absorption in longer wavelengths, making it particularly suitable for pigmented systems and thick ink layers.

Performance Advantages

• Strong UV absorption (365–400 nm) – ideal for modern UV LED and mercury lamps
• Excellent surface curing – reduces tackiness in oxygen-inhibited systems
• Cost-effective solution – widely used in large-scale printing inks
• Improved pigment penetration – suitable for colored and opaque systems
• Flexible formulation compatibility – works well with amine synergists

Applications:

• Used in UV-curable materials composed of unsaturated polyester, acrylic monomers, etc.
• It is widely used in colored electronic ink products; Wooden furniture, decorative paints and adhesives, etc. When used together with cationic photoinitiators, it has the function of a sensitizer.

Recommended Dosage

Typical dosage: 0.2% – 2% depending on formulation requirements and photoinitiator system.

ITX vs Other Photoinitiators

Technical Specifications

• CAS No.:5495-84-1
• Chemical Name:Isopropyl thianthone (a mixture of 2 and 4 isomers)
• Molecular Formula:C16H14OS
• Molecular Weight:254.3
• Appearance: Light yellow powder

Package:

25KG cartons

Storage and Transportation:

• Keep container tightly closed and dry and storage in cool place.
• Attention should be paid to avoiding light during production, manufacturing, storage and transportation.