A breakthrough in UV curing technology Photomer^® SC91 from iGM Resins represents a new chemistry that fundamentally changes how photoinitiation is delivered in UV and LED systems. A self-curable acrylate resin with built-in photoinitiator functionality, Photomer SC91 enables UV Hg or UV LED curing with no or only minimal addition of external photoinitiators. This is achieved by integrating the photoinitiating groups directly into the resin backbone.

This Type II photoactive concept combines acrylate and photoinitiator technologies in a single polymeric material. As a result, the photoinitiator part remains chemically bound within the structure.

The acrylate resin addresses key formulation challenges in modern UV systems:

• Reduced or eliminated need for added photoinitiators
• Low migration potential for sensitive applications
• No detectable extractable photoinitiator under test conditions
• Polymer classification with molecular weight above 1000 Da

This makes it particularly suitable for applications such as indirect food contact packaging, where control of migration is critical.

• Photomer SC91 delivers strong technical performance across multiple dimensions:
• Efficient curing under both UV Hg and LED systems
• Excellent formulation compatibility
• Liquid form for easy handling and processing
• Typical use levels between 10 and 20 percent in formulations

As a Type II system, it requires the presence of a synergistic amine or hydrogen donor to achieve optimal curing performance.

Applications include printing inks and packaging, industrial coatings, electronics and advanced materials, and adhesives. Its flexibility allows formulators to simplify systems while maintaining high performance.

The launch of Photomer SC91 marks the beginning of a new Photomer SC series. This platform is based on self-curable resin technology and will expand to address evolving market requirements in performance, sustainability, and regulatory compliance. iGM Resins is developing additional materials within this series to support next generation UV formulations. The company is currently awaiting customer feedback to guide it in creating the optimal new combination of acrylate and photoinitiator for evolving application needs.

Learn more at igmresins.com.