Photoinitiator PBZ

High-efficiency benzophenone-type photoinitiator for UV curing systems

Photoinitiator PBZ is an efficient free radical photoinitiator, used in conjunction with tertiary amine co-initiators to carry out curing polymerization of the corresponding resins. It is suitable for use in varnishes, inks, coatings, adhesives.

PBZ provides fast surface curing, excellent compatibility with amine synergists, and improved yellowing resistance compared to traditional benzophenone systems.

Key Features & Benefits

• Fast surface curing under UV light
• Low yellowing compared to conventional benzophenone
• Excellent compatibility with tertiary amines
• Cost-effective solution for industrial UV systems
• Good solubility in common acrylates and oligomers
• Improved curing efficiency in pigmented systems

Typical Applications

• UV inks (offset, flexo, screen printing)
• UV coatings (wood, plastic, paper)
• Adhesives and pressure-sensitive systems
• Overprint varnishes (OPV)

Recommended Dosage

Typical dosage: 1% – 5% depending on formulation requirements and photoinitiator system.

Performance Advantages Over Traditional Benzophenone

Technical Specifications

• CAS No.:2128-93-0
• Chemical Name:4-phenylbenzophenone
• Molecular Formula:C19H14O
• Molecular Weight:258.3
• Appearance: White powder

Recommended Formulation Tips

• Use with amine synergists (e.g., EDB) for optimal performance
• Combine with Type I photoinitiators for deep curing
• Optimize dosage depending on pigment concentration

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.