IGM Omnirad 4PBZ UV Photoinitiator

Features Of IGM Omnirad 4PBZ UV Photoinitiator

1. Benzophenone Type II initiation - High free radical initiation efficiency, can quickly initiate the polymerization of unsaturated oligomers, stable curing

2. Broad-spectrum adaptability - Compatible with various acrylate systems, suitable for solvent-based and water-based UV curing formulations, strong versatility

3. Benzene-free environmental protection - Benzene-free formula, meets high-end environmental compliance, suitable for sensitive application scenarios

4. Easy processing and storage - Solid form easy to store and transport, easy to add and mix, no complex process adjustment needed

5. Multi-scenario adaptation - Suitable for transparent and colored systems, no impact on the appearance and core performance of end products

Typical Applications Of IGM Omnirad 4PBZ UV Photoinitiator

1. Printing ink field - Offset, screen, flexo inks and overprint varnishes, fast curing, high printing precision

2. Wood coating field - Wood UV varnishes/colored paints, strong adhesion, scratch resistance, improving wood decoration durability

3. Plastic coating field - UV protective coatings for plastic surfaces, good fit, excellent weather resistance and chemical resistance

4. Paper coating field - Paper UV curing coatings, high efficiency curing, improving paper surface gloss and wear resistance

5. UV adhesive field - Acrylate-based UV adhesives, high bonding strength, fast curing speed, suitable for general bonding

Specifications Of IGM Omnirad 4PBZ UV Photoinitiator

IGM Omnirad 4PBZ UV Photoinitiator – Frequently Asked Questions (FAQ)

Q1: What is the primary photolysis mechanism of Omnirad 4PBZ?

A: Omnirad 4PBZ operates via a Norrish Type I cleavage mechanism, generating highly reactive benzoyl and alkyl radicals upon UV exposure—enabling efficient free-radical polymerization in acrylate-based systems without requiring co-initiators.

Q2: How does Omnirad 4PBZ compare to traditional benzoin ether initiators in terms of yellowing and stability?

A: Unlike older benzoin ethers, Omnirad 4PBZ exhibits significantly improved thermal and storage stability, along with reduced post-cure yellowing—making it suitable for demanding clear-coat and white-pigmented applications where color fidelity is critical.

Q3: In which types of UV-curable formulations is Omnirad 4PBZ most commonly used?

A: It is widely employed in low-odor, high-reactivity UV coatings and inks—especially for flexible substrates (e.g., films, foils), overprint varnishes, and LED-UV curable systems where rapid surface cure and good through-cure balance are required.

Q4: Is Omnirad 4PBZ compatible with amine synergists or other photoinitiators?

A: Yes—it can be effectively combined with amine co-initiators (e.g., tertiary amines) to enhance surface cure in oxygen-inhibited environments, and is often formulated alongside Type II initiators like thioxanthones to broaden spectral response and improve depth of cure.

Q5: What is the typical dosage range for Omnirad 4PBZ in standard UV formulations?

A: Dosage depends on formulation requirements, substrate, and irradiation conditions—but it is typically used at low concentrations, generally ranging from 0.1% to 2% by weight relative to total solids, with optimization recommended via small-scale cure testing.