Pentaerythritol Triacrylate
CAS Number: 3524-68-3
Pentaerythritol triacrylate (PETA) is a trifunctional acrylate crosslinker with a residual hydroxyl group that provides enhanced adhesion to polar substrates and compatibility with urethane acrylate oligomers. PETA is widely used in UV-curable hard coats for plastics, anti-scratch optical films, and high-crosslink-density ink formulations.
Technical Specifications
| appearance | Colorless to pale yellow liquid |
| purity (%) | ≥90.0 |
| inhibitor (MEHQ, ppm) | 200 ± 50 |
| hydroxyl value (mg KOH/g) | 65–85 |
| viscosity (mPa·s, 25°C) | 350–500 |
Applications
- UV-curable hard coat for polycarbonate and PMMA optical films
- Anti-scratch and abrasion-resistant flooring and furniture coatings
- High-definition flexo and digital UV printing inks
- UV-curable optical fiber coating formulations
- Acrylate-based negative photoresist for PCB manufacturing
Key Features
- Residual hydroxyl group improves adhesion to polar substrates and urethane compatibility
- Trifunctionality ensures high crosslink density for pencil hardness >4H in hard coats
- Higher viscosity than TMPTA makes it suitable as sole crosslinker in thick-film applications
- Good yellowing resistance suitable for optical and clearcoat applications
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CAS Number
3524-68-3
Category
Polymer Synthesis ChemicalsAvailability
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