ECure 401

ECure 401, with the chemical name 1-[4-(Phenylthio)phenyl]-1,2-octanedione 2-(O-benzoyloxime), is a high-performance photoinitiator widely utilized in ultraviolet (UV) curing systems.

Its CAS registry number is 253585-83-0, and it plays a critical role in accelerating polymerization processes under UV light exposure, particularly in coatings, inks, and adhesives.

Key Characteristics

1. Chemical Properties
   • Molecular Formula: C27H27NO3S
   • Molecular Weight: 445.573 g/mol
   • Density: 1.112 g/cm³
   • Boiling Point: 594.7°C at 760 mmHg
2. Physical Properties
   • Appearance: Pale yellow crystalline powder
   • Melting Point: 40–45°C
   • Purity: ≥99%
   • Volatile Content: ≤0.5%

Applications

ECure 401 is prized for its ability to enhance curing efficiency and material performance in the following industries:

1. UV-Curable Coatings: Improves surface hardness, wear resistance, and gloss retention in automotive, electronics, and industrial coatings.
2. UV Printing Inks: Ensures rapid curing, strong adhesion, and vibrant color reproduction for packaging and graphic arts.
3. UV Adhesives: Delivers high bonding strength and environmental durability in optical and electronic assemblies.

Advantages

• Fast Curing: Reduces production time by enabling rapid polymerization under UV light.
• Deep Curing Penetration: Suitable for thick or pigmented formulations.
• Low Volatility: Minimizes emissions during processing.

ECure 401 is a highly efficient photoinitiator, which is used to initiate radical photopolymerization of ethylenically unsaturated compounds. It is particularly suitable for applications requiring high photosensitivity in combination with low yellowing.