OXE-02 is a highly efficient radical-type photoinitiator belonging to the alkoxyphosphine family. Its key characteristics include long absorption wavelength, high photolysis efficiency, and rapid curing speed, coupled with outstanding deep-curing and yellowing resistance. This makes it particularly suitable for applications demanding high curing thickness, fast curing speed, and color stability.

1. UV-LED Curing Systems

This represents OXE-02's most significant and fastest-growing application segment.

• Reason: Traditional mercury lamps emit broad-spectrum UV radiation, whereas UV-LED light sources emit monochromatic light at specific wavelengths (typically 365nm, 385nm, 395nm, or 405nm). OXE-02 exhibits strong absorption in the long-wave UVA region (particularly 350-420nm), perfectly matching the emission wavelengths of mainstream UV-LED light sources.
• Application Products:
  • UV-LED Inks (e.g., inkjet printing, flexographic printing)
  • UV-LED Coatings
  • UV-LED Adhesives

2. White and Colored Systems

OXE-02 is a critical component in white coating and ink formulations.

• Reason: White pigments like titanium dioxide strongly scatter and block short-wave UV light, preventing penetration into deeper coating layers. OXE-02's long-wave absorption properties enable it to penetrate the pigment barrier, effectively initiating curing at the coating base. This prevents “surface dry, base wet” issues and ensures excellent adhesion.
• Application Products:
  • UV topcoats for white goods (e.g., refrigerators, washing machines)
  • White printing inks for paper and plastics
  • Colored paint systems containing other high-opacity pigments

3. Thick Coatings and Composites

OXE-02 is ideal for applications requiring single-pass curing of thick coatings.

• Reason: Long-wave UV light penetrates deeper than short-wave UV. OXE-02 effectively absorbs this long-wave energy, ensuring uniform photopolymerization throughout the coating thickness for complete curing.
• Application Products:
  • Wood filler putty
  • Electronic Component Encapsulation Adhesives
  • Glass Fiber Reinforced Composites (e.g., FRP)

4. Applications Requiring Yellowing Resistance

Compared to some traditional initiators (e.g., ITX), OXE-02 and its photolysis products exhibit lighter coloration, thereby better preserving the original hue of cured materials.

• Reason: Its molecular structure and photolysis products are less prone to generating chromophores.
• Application Products:
  • High-transparency varnishes and topcoats
  • Overprint varnishes requiring high color fidelity
  • Plastic coatings demanding high color stability (e.g., PET, PMMA)

5. 3D Printing (UV Curing)

In UV-curing 3D printing, OXE-02 serves as a critical photoinitiator.

• Reason: Many desktop and industrial LCD/DLP 3D printers utilize 405nm UV-LEDs as light sources. OXE-02 exhibits high compatibility with this wavelength, ensuring rapid and precise resin curing with superior dimensional accuracy.
• Application Products:
  • LCD (mask exposure) and DLP (digital light processing) 3D printing photopolymer resins.

Key Advantages Summary

1. Long-Wavelength Absorption: Perfectly matches UV-LED light sources (365-405nm).
2. Deep Curing Capability: Effectively cures white, high-opacity pigment systems and thick coatings.
3. Low Yellowing: Yields color-pure cured products with superior aging resistance.
4. High Photolysis Efficiency: As a Type I initiator, it directly decomposes into active radicals upon photon absorption without requiring co-initiators, enabling rapid curing.
5. Excellent Compatibility: Compatible with most acrylic oligomers and monomers.

In summary, OXE-02 is a high-performance, indispensable photoinitiator in modern UV curing technology, particularly UV-LED curing systems, widely applied in premium printing, coatings, adhesives, and emerging 3D printing applications.