Say Goodbye to Blooming & Migration! CAS 2035-72-5 Reactive UV Absorbing Monomer Redefines the Benchmark of Weather Resistance and Anti-Yellowing for High-End UV-Curing Systems

Tired of long-term aging and yellowing of UV-cured articles, blooming and migration of additives, surface hazing, and failed compliance tests due to extractables? Conventional small-molecule UV absorbers are simply blended into resin systems and remain free within the cured film network. Over time, migration and bleeding occur under heat, water immersion, friction and weathering: reduced transparency of optical films, excessive extractable risks for medical coatings, migration contamination concerns for food packaging, and gloss loss & cracking of outdoor inks. Many high-end export formulas hit a bottleneck on low-migration requirements and cannot be approved.

CAS 2035-72-5｜2-Hydroxy-4-(methacryloyloxy)benzophenone (commonly known as UV725) A reactive benzophenone UV-absorbing functional monomer equipped with polymerizable double bonds, breaking the limitations of traditional additive light stabilizers from the fundamental mechanism!

✅ 【Covalently Bonded into Resin Matrix — Truly Non-Migratory, Non-Bleeding, Non-Blooming】 Its molecular structure carries reactive methacrylate double bonds. During UV curing / thermal curing crosslinking, it directly participates in free-radical copolymerization and is firmly grafted into the polymer crosslink network instead of existing as free small molecules. No migration or bleeding out of coatings and resins under warm water immersion, high-low temperature cycling or long-term outdoor exposure. It perfectly addresses the most challenging extractables control requirements for highly regulated industries.

✅ 【Broadband UV Blocking for Long-Term Anti-Yellowing & Anti-Aging Performance】 Characteristic absorption range: 280–360 nm, fully covering harmful UVB and UVA bands. Based on the classic intramolecular hydrogen bond reversible proton transfer mechanism of benzophenone, it safely converts destructive UV energy into harmless thermal energy without generating free-radical by-products. It continuously suppresses the photo-oxidative degradation chain reaction of resins, protecting substrates sustainably: films resist yellowing, cracking, gloss loss and hazing, greatly extending service life under weathering.

✅ 【High Transparency & Formulation Compatibility with Mainstream UV-Curing Systems】 Appearance: white to pale yellow crystalline powder; melting point: 77~79℃; insoluble in water, highly soluble in acetone, ethyl acetate, toluene and various acrylic monomers and oligomers. It exhibits excellent compatibility with most UV-curing systems including epoxy acrylate, polyurethane acrylate and pure acrylic resins. Within the recommended dosage range, it has minimal adverse impact on curing speed, surface cure and through cure. Cured films maintain high light transmittance and will not impair the clarity of optical films and transparent components, ideal for high-transparency applications.

✅ 【Premium Choice for Highly Regulated Applications, Suitable for Demanding Scenarios】

▫️Optics: PET/PC optical protective films, release films, transparent functional films — no hazing or yellowing over service time

▫️Medical Consumables: UV-cured coatings for medical catheters and auxiliary implant components, meeting low-extractable specifications

▫️Food-Contact Packaging: UV-curable inks and overprint varnishes for food packaging to mitigate additive migration risks

▫️Outdoor Weatherable Materials: Weather-resistant topcoats for outdoor plastics and wood, outdoor marking inks

▫️Additive Manufacturing: SLA/DLP photopolymer 3D printing resins, preventing yellowing and embrittlement of printed parts during storage

▫️Flexible Electronics: Protective coatings on flexible substrates

Comparison with conventional UV absorbers: Traditional additive-type UV absorbers are merely “mixed in”, while UV725 is “chemically built into the resin”. The difference in short-term anti-yellowing performance is limited, but the performance gap widens dramatically after aging tests, extraction tests and long-term real-time aging. For UV-curing formulas exported to Europe and the US that require FDA compliance, food-contact approval, low extractables for medical use and high optical grade, UV725 (CAS 2035-72-5) is the preferred functional monomer balancing weather resistance, optical clarity and safety.

As UV-curing products keep upgrading and downstream standards for aging and extractables become stricter year by year, selecting the right light-stabilizing monomer directly helps you avoid formula failure, rejected samples and lost orders. CAS 2035-72-5: Equip your high-end UV-curing formulations with a long-lasting UV protection lock!