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High reactivity under standard UV LED and mercury lamp sources for rapid, energy-efficient curing.
Excellent adhesion to diverse substrates including plastics, metals, and coated papers.
Low shrinkage and superior hardness development post-cure, ensuring dimensional stability.
Good chemical resistance to alcohols, weak acids, and common cleaning agents.
Low VOC and halogen-free formulation, compliant with industrial environmental and safety standards.
UV-curable overprint varnishes for flexible packaging and label printing.
Hard-coat formulations for optical films and touch panel cover layers.
Industrial inkjet ink binder for high-gloss decorative finishes on rigid substrates.
Protective coatings for automotive trim components and interior plastic parts.
Adhesive primers for UV-laminated composite assemblies in electronics manufacturing.
| Chemical Type | Acrylated oligomer blend (urethane acrylate & epoxy acrylate) |
| Product Form | Liquid resin |
| Appearance | Pale yellow, transparent liquid |
| Viscosity (25°C, mPa·s) | 800–1,200 |
| Solid Content | 100% (solvent-free) |
| Refractive Index (25°C) | 1.495 ± 0.005 |
| Storage Stability (25°C) | ≥12 months in sealed container |
| Primary Applications | UV-curable coatings, inks, and adhesives requiring high surface hardness and fast cure |
Q1: What is the primary function of Kingchem EC7561 in UV-curable formulations?
A: Kingchem EC7561 serves as a reactive diluent and oligomeric binder that enhances crosslink density, improves surface hardness, and contributes to rapid cure response under UV irradiation. It is designed to balance reactivity, viscosity reduction, and final film performance in free-radical UV systems.
Q2: Is EC7561 compatible with common photoinitiators used in industrial UV curing?
A: Yes, EC7561 demonstrates good compatibility with standard free-radical photoinitiators such as alpha-hydroxy ketones, phosphine oxides, and benzophenone derivatives. Formulators should verify initiator selection based on spectral output of their UV source and desired surface vs. through-cure profile.
Q3: How does EC7561 affect viscosity and pot life in formulated resins?
A: EC7561 exhibits low to moderate viscosity at room temperature, enabling efficient formulation without excessive solvent or diluent addition. As a difunctional acrylic resin, it supports reasonable pot life in inert conditions prior to UV exposure, though stability depends on ambient light, temperature, and presence of residual initiators or inhibitors.
Q4: Can EC7561 be blended with other acrylic monomers or oligomers?
A: Yes — EC7561 is fully miscible with common acrylate monomers (e.g., HDDA, TPGDA) and urethane or epoxy acrylate oligomers. Blending allows tailoring of flexibility, adhesion, chemical resistance, and cure speed, making it suitable for coatings, inks, and adhesive applications.
Q5: What storage conditions are recommended to maintain EC7561 stability?
A: Store in tightly sealed containers under cool, dry, and dark conditions — ideally below 25 °C and protected from direct sunlight and UV sources. Inhibitors are included to prevent premature polymerization; avoid contamination with amines, strong bases, or metal ions that may compromise shelf life.
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E-mail: wangxingqiang@ericwchem.com
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