Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

IGM Omnirad 500 UV Photoinitiator

IGM Omnirad 500 is a high-efficiency compound free radical UV photoinitiator in the Omnirad series, designed for UV radiation curing systems. Composed of 50% Omnirad BP (benzophenone) and 50% Omnirad 481 (1-hydroxycyclohexyl phenyl ketone), it combines the core advantages of both. It can quickly decompose to generate free radicals when exposed to UV light, efficiently initiating the polymerization of acrylates and oligomers. Suitable for both water-based and solvent-based systems

Features Of IGM Omnirad 659 UV Photoinitiator

  1. High-efficiency Type I initiation - α-hydroxy ketone structure, fast free radical generation, high polymerization efficiency and fast curing speed

  2. Excellent water-based compatibility - Designed specifically for water-based systems, good dispersibility, no additional compatibilizer needed, suitable for various water-based UV formulations

  3. Full-system adaptation - Compatible with water-based and solvent-based UV curing systems, strong versatility, no separate formula adjustment needed

  4. Liquid easy processing - Low viscosity liquid form, easy to add and disperse, can reduce formula viscosity and improve processing efficiency

  5. Benzene-free low-odor environmental protection - Benzene-free formula, extremely low odor, meets high-end environmental compliance, suitable for sensitive scenarios

Typical Applications Of IGM Omnirad 659 UV Photoinitiator

  1. Water-based UV coatings - Water-based UV wood paints and plastic paints, uniform dispersion, strong adhesion and excellent water resistance of cured film

  2. Printing ink field - Water-based screen and flexo inks, fast curing, high printing precision, suitable for various substrates

  3. Plastic coating field - Water-based UV protective coatings for plastic surfaces, good fit, outstanding scratch resistance and weather resistance

  4. Paper coating field - Water-based UV paper coatings, high efficiency curing, improving paper gloss and wear resistance, no residual odor

  5. UV adhesive field - Water-based acrylate UV adhesives, high bonding strength, suitable for water-based bonding scenarios, environmentally friendly and non-irritating

Specifications Of IGM Omnirad 659 UV Photoinitiator

BrandIGM (Omnirad® series)
Chemical Typeα-Hydroxy ketone Type I free radical UV photoinitiator
CAS No106797-53-9
Appearance (25℃)Colorless to pale yellow transparent liquid
Purity≥98.5%
Molecular Weight250.28g/mol
Melting PointAbout -10℃
Absorption Wavelength Range240-350nm (in methanol)


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