Empowering New UV-Curing Materials｜Reactive UV Absorber BP-1A, Unlocking New Solutions for Coating Weather Resistance

Recently, 2-Hydroxy-4-acryloyloxybenzophenone (CAS: 15419-94-0, trade name: BP-1A), a high-performance UV-curing functional additive, has attracted extensive attention in the UV-curing, coating and ink industries. As a benzophenone-based reactive UV absorber capable of participating in UV polymerization and cross-linking, this product addresses the industry pain points of migration, blooming and weathering degradation of conventional small-molecule UV absorbers. It delivers long-term UV-protection solutions for outdoor UV-curing coatings, photoresists, optical films and 3D-printing resin systems.

Conventional small-molecule UV absorbers are merely physically blended. Upon long-term service, they tend to migrate to the coating surface, causing blooming, precipitation and deteriorated weather resistance, which impair the appearance and service life of finished products. Featuring intrinsic acrylate double-bond groups in its molecular structure, BP-1A (15419-94-0) undergoes covalent grafting with the resin matrix during UV curing. It is firmly anchored inside the polymer network, fundamentally restraining additive migration and loss, and greatly improving the coating’s weather resistance, extraction resistance and water-washing resistance.

    Basic Product Specifications 

    CAS No.: 15419-94-0

    Molecular Formula: C16H12O4

    Molecular Weight: 268.26

    Appearance: Off-white solid

    Purity: ≥98%

     Excellent absorption capacity for UV-A and UV-B bands; good compatibility with acrylate monomers and oligomers;                     no interference to the curing speed of UV-curing systems; low coloration with minor impact on coating transparency.

Core Advantages

1.Reactive bonding with zero migration: The acrylate reactive double-bond takes part in photopolymerization and becomes part of the resin molecular chain, eliminating precipitation and blooming.

2.High-efficiency UV absorption: The benzophenone parent structure efficiently absorbs UV light within 280-360 nm, retarding coating yellowing, aging and chalking.

3.Excellent compatibility: Compatible with various UV-curing systems without compromising coating gloss and transparency.

4.Wide applicability: Suitable for water-based, solvent-based and solvent-free UV-curing formulations.

Main Application Fields 

• UV-curing coatings: wood coatings, plastic UV coatings, outdoor protective clear coats

• UV inks, UV-curing adhesives

• Optical films, photoresists, 3D-printing photosensitive resins

• UV-curing composite materials and polymer systems requiring long-term UV-resistant weather performance

Recommended Dosage: 0.5-3.0 wt%, adjust according to weather-resistance requirements. Pre-mix with monomers / oligomers before formulation.

Note: This product contains acrylate double bonds. Store in sealed, cool and dark conditions to prevent premature self-polymerization.

industry technicians state that with the upgrading of downstream outdoor UV-curing products, ordinary  physically-blended UV absorbers can hardly meet the long-term weather-resistance requirements of highend finished articles. With its covalent immobilization property, reactive UV absorber CAS 15419-94-0 is becoming a preferred functional additive for high-end UV-curing formulations, facilitating the iteration and upgrading of UV-curing materials toward high durability and high performance.