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GENOPOL* BP-5 is a high-performance polymeric benzophenone photoinitiator developed for UV-curable inks, coatings and varnishes where low migration and low odor are essential. Thanks to its high molecular weight and excellent curing efficiency, it is particularly useful as a replacement for low molecular weight benzophenone types.

Key Benefits at a Glance

• High-efficiency polymeric benzophenone photoinitiator
• Extremely low migration due to high molecular weight (Mw/GPC ~2200) and high purity
• Low odor
• Reduced oxygen inhibition

Bound within cured networks, GENOPOL* BP-5 helps formulators achieve low migration without sacrificing cure speed or efficiency.  

Application Areas  

GENOPOL* BP-5 is ideally suited for: 

• Offset inks and varnishes
• Flexo inks and varnishes
• Screen printing inks and varnishes
• UV coatings and adhesives

GENOPOL* BP-5 aligns with key industry listings, including Swiss Ordinance, German Printing Ink Ordinance (GIO), EuPIA suitability list and Nestlé Guidance. 

Ready to explore the benefits of GENOPOL* BP-5?  

Many UV/EB applications specifically require low viscosity products that, unlike many reactive diluents, also contribute to overall performance after cure. When low viscosity can be combined with high cure speeds, particularly under LED curing, as well as good over-all resistance properties, a broad range of formulator needs can be addressed. RAHN’s range of polyether acrylates has proven to be of excellent value in a wide array of applications. 

Let's highlight GENOMER* 3364, GENOMER* 3365, GENOMER* 3414, GENOMER* 3430, GENOMER* 3457, GENOMER* 3497, and GENOMER* 3498.

Key Products at a Glance

• GENOMER* 3364 – High reactivity, low viscosity, good solvent resistance.
• GENOMER* 3365 – <0,1% TMPTA, high reactivity, low viscosity, good solvent resistance.
• GENOMER* 3414 – High reactivity, low viscosity, good solvent and scratch resistance, flexibility and adhesion, low Tg.
• GENOMER* 3430 - High reactivity in LED formulations, good flexibility, low yellowing, good adhesion.
• GENOMER* 3457 - High reactivity, high hardness, chemical resistance and adhesion.
• GENOMER* 3497 – High reactivity, low viscosity, good solvent resistance. 
• GENOMER* 3498 – High reactivity, low viscosity, good solvent resistance, <0.1% TMPTA.

Why Choose GENOMER* Polyether Acrylates? GENOMER* polyether acrylates are characterized by high reactivity and low viscosity, combined with good solvent, scratch and abrasion resistance, moderate to high hardness, low odor and high gloss.

Achieving consistent, high-quality results in photoresin 3D printing starts with one key factor: calibration. Our newly published article, "3D Printing Calibration – The Essential Guide to Calibration Templates", shows how to fine-tune your printing process for optimal accuracy, resolution, surface quality, and part performance. 

Discover how a dedicated calibration template - featuring pin-and-hole arrays, overhangs, and fine details - helps translate printer settings into measurable results and enables fast, reliable optimization. 

Explore the full guide and download the calibration template here

We are proud to announce the release of our brand-new Sustainability Report, reflecting our commitment to responsible business practices and a sustainable future. This comprehensive report provides insights into our environmental, social, and governance initiatives and outlines the progress we have made toward our long-term sustainability goals.

Transparency and accountability are at the heart of our approach. By continuously reducing our environmental footprint and fostering ethical partnerships, we aim to deliver value not only to our customers but also to society and the environment.

Explore the full Sustainability Report now and learn how we are shaping a greener tomorrow

We are excited to announce the launch of GENOMER* 4236, a next generation difunctional aliphatic urethane acrylate designed to deliver exceptional performance across a wide range of radiation curable applications.

Crafted for formulators seeking flexibility, durability, and reliable adhesion, GENOMER* 4236 sets a new benchmark for high performance coatings and inks.

Why GENOMER* 4236 stands out

• Excellent outdoor resistance – formulated to withstand demanding environmental exposure, making it ideal for long lasting topcoats.
• Outstanding flexibility – achieve smooth, crack free results - even on challenging substrates or bending applications.
• Good adhesion, especially on metal – GENOMER* 4236 enhances adhesion performance and enables low T bend values in coil coating systems when combined with flexible monomers.
• Low yellowing – Maintains color and gloss for pigmented and clearcoat systems.
• High impact resistance – perfect for applications where mechanical strength and durability matter.

Key Technical Highlights

• Functionality: 2
• Viscosity (60 °C): ~18,000 mPa·s
• Color Index: ~50 APHA
• Tg: 24 °C
• Shore Hardness: D78
• Elongation at Break: 30%

These mechanical and optical characteristics make it a versatile building block for UV curable high end formulations.