Photoinitiator MBF – Liquid UV Curing Agent for Superior Surface Cure & Low Yellowing

With the rapid advancement of UV curing technology, increasingly stringent requirements are being placed on low yellowing, high curing efficiency and process compatibility in coatings, inks, adhesives and other industries. As a highly efficient liquid free‑radical photoinitiator, Photoinitiator MBF (Methyl Benzoylformate, CAS 15206‑55‑0) has become the preferred solution for clear systems, dark‑color systems and demanding industrial applications. It stands out for its excellent surface cure, low odor and balanced deep curing performance, and is widely used in coatings, inks, electronic materials and other fields.

Core Properties – Targeted Solutions to Industry Pain Points

1. Liquid & Easy to Use, Excellent Process Compatibility

It is a pale yellow transparent liquid at room temperature with a viscosity of approximately 5 mPa·s at 25°C. It can be added directly without heating, and its solubility in organic solvents and acrylate monomers exceeds 50 g/100 g, ensuring high dispersion efficiency. It is compatible with all kinds of UV curing production lines, produces no dust pollution, and greatly improves process convenience.

2. Low Yellowing & Low Odor for Superior Quality and Experience

Its photolysis products feature stable structures with a low tendency to form chromophores, resulting in extremely low yellowing. It is ideal for clear varnishes, white coatings, light‑colored inks and other applications requiring high color stability. With low residual volatiles and minimal odor after curing, it meets environmental and safety requirements for interior coatings, food‑contact packaging and electronic devices.

3. Balanced Surface and Deep Curing Performance

Its UV absorption peaks cover two bands: 255 nm (short wave) and 325 nm (long‑wave tail). The short‑wave band delivers strong surface curing, quickly forming a stain‑resistant, high‑gloss surface. The long‑wave tail provides moderate penetration, overcoming UV shielding from pigments to support deep curing of dark‑color systems and thick coatings without additional exposure time.

4. Excellent Thermal Stability & Strong Compatibility

It exhibits good thermal stability and can be used alone or in combination with common photoinitiators such as 184, TPO and ITX to optimize the balance between curing efficiency and performance. It is compatible with a wide range of UV resin systems, offering high application flexibility.

Core Applications – Versatile Performance Across Scenarios

1. UV Coatings

• Wood Coatings: Suitable for both primers and topcoats, providing high‑gloss, high‑hardness films. Low odor makes it ideal for interior decoration, while low yellowing ensures long‑term appearance stability.

• Plastic Coatings: Compatible with ABS, PC and other plastic substrates, with low thermal impact during curing and excellent adhesion, integrating surface protection and decoration.

• Paper Varnishes: Fast surface curing boosts production efficiency, delivering high gloss and scratch resistance for high‑end packaging printing.

• Industrial Coatings: Low yellowing preserves light transmittance in optical component coatings, meeting the curing requirements of precision parts.

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2. UV Inks & Electronic Materials

• Dark‑Color Inks: Ideal as a core initiator for highly opaque black and magenta inks, enabling deep curing by penetrating pigment shielding and improving adhesion and uniformity. It is widely used in PCB solder mask inks and screen printing inks.

• Electronic Materials: Applied in PCB solder mask inks, dry films and photoresists, with fast photosensitivity and sharp imaging edges supporting the manufacture of precision electronic components.

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3. UV Adhesives

Its liquid form offers excellent compatibility with adhesive systems and controllable curing speed. It is suitable for bonding applications sensitive to odor and yellowing, balancing bond strength and ease of operation.

With its key advantages of liquid usability, low yellowing, low odor and dual‑band curing, MBF precisely addresses process and performance challenges in coatings, inks and electronic materials. It fulfills fast surface‑curing demands, overcomes curing limitations in dark systems, and meets environmental and quality standards, making it a representative versatile and highly compatible photoinitiator.