Unlock new performance levels in UV coatings, inks, and electronic materials
The UV curing industry is moving fast—literally. High-speed LED curing lines, industrial coatings, and precision electronics manufacturing are pushing formulators to demand faster cure, higher hardness, and better chemical resistance. At the heart of these formulations are multifunctional monomers that act as the “backbone” of the cured network.
SINOMER PETA (Pentaerythritol Triacrylate) is a classic trifunctional acrylate monomer that delivers exactly what modern UV systems need: high crosslink density, rapid curing, and exceptional film hardness. It has become an essential building block in UV coatings, inks, and electronic materials.
SINOMER PETA has a CAS number of 3524-68-3 and a molecular weight of 298. Its structure combines three acrylate double bonds with one pendant hydroxyl group, creating a unique performance profile:
Three acrylate double bonds – Provide high reactivity for rapid free-radical polymerization under UV light. This builds a dense three-dimensional crosslink network, resulting in high hardness, excellent wear resistance, and strong chemical resistance.
Pendant hydroxyl group – Unlike typical trifunctional monomers, this hydroxyl group can form hydrogen bonds with polar groups on substrates. This significantly improves adhesion to metals, plastics, and other difficult substrates, reducing the risk of coating delamination.
Stable carbon backbone – The cured network is dense and thermally stable, offering excellent heat resistance and electrical insulation—ideal for demanding electronic applications.
SINOMER PETA balances reaction efficiency, mechanical properties, and formulation compatibility. Here’s what it brings to your UV system:
The high reactivity of the acrylate double bonds allows rapid polymerization under UV-LED light sources. This shortens exposure time, increases line speed, and supports continuous, high-volume production.
The dense three-dimensional network delivers outstanding pencil hardness, excellent scratch and abrasion resistance, and strong resistance to alcohol, mild acids, and mild bases. Films resist solvent attack and gloss loss, extending the service life of the final product.
The unique hydroxyl group builds stronger interfacial bonding on metal and plastic substrates. Compared to conventional trifunctional monomers, SINOMER PETA significantly reduces coating flaking and peeling, lowering the need for additional adhesion promoters.
SINOMER PETA is compatible with a wide range of UV oligomers—epoxy acrylates, polyurethane acrylates, polyester acrylates—and other reactive monomers. Formulators can easily adjust ratios to meet specific performance targets.
Thanks to its combination of fast cure, high hardness, high crosslink density, and good adhesion, SINOMER PETA is widely used in demanding UV-curable applications:
UV Industrial Coatings – For plastic, metal, and wood topcoats. Increases film hardness, wear resistance, and solvent resistance, protecting surfaces in harsh environments.
UV Inks – For screen printing and metal packaging inks. Improves ink layer abrasion resistance and adhesion to substrates.
Electronic Photosensitive Materials – For PCB solder resist inks. Provides electrical insulation, heat resistance, and resistance to solder corrosion, ensuring reliable circuit board performance.
UV Adhesives – Small additions increase crosslinking and cohesive strength, ideal for bonding applications requiring hardness and chemical resistance.
Resin Synthesis Intermediate – The pendant hydroxyl group can react with isocyanates to synthesize high-functionality polyurethane acrylate resins.
The UV curing industry continues to advance toward high-speed LED curing, industrial coating, and precision electronics manufacturing. As line speeds increase, the demand for monomers with fast cure, high hardness, and chemical resistance grows stronger. Multifunctional crosslinking monomers play an increasingly critical role in formulation design.
SINOMER PETA—with its mature, stable performance and excellent cost-performance ratio—will continue to deliver value in industrial coatings, inks, and electronic materials.
Q1: What is SINOMER PETA?
A: SINOMER PETA is our trade name for pentaerythritol triacrylate, a trifunctional acrylate monomer with three reactive double bonds and one pendant hydroxyl group. It is widely used as a crosslinking monomer in UV-curable systems.
Q2: What is the typical addition level?
A: Recommended dosage varies by formulation. Typical use levels range from 5% to 30% of the total formulation, depending on the desired crosslink density, hardness, and cure speed. Small-scale trials are recommended to determine the optimal level.
Q3: Is SINOMER PETA compatible with UV-LED curing?
A: Yes. Its high reactivity makes it well suited for UV-LED systems. It cures rapidly and can help achieve tack-free surfaces even at high line speeds.
Q4: Does SINOMER PETA improve adhesion?
A: Yes. The pendant hydroxyl group can form hydrogen bonds with polar groups on metal, plastic, and other substrates, improving adhesion and reducing the need for additional adhesion promoters.
Q5: What oligomers is SINOMER PETA compatible with?
A: It is compatible with most UV oligomers, including epoxy acrylates, polyurethane acrylates, polyester acrylates, and various reactive monomers. Compatibility testing is recommended for specific systems.
Q6: Can SINOMER PETA be used in food-contact applications?
A: SINOMER PETA has not been tested or stated as suitable for medical or food-contact applications. Customers should verify regulatory compliance for their specific end use.
Q7: How should SINOMER PETA be stored?
A: Store in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Keep containers tightly closed. Shelf life is typically 12 months in the original unopened container.
Ready to elevate your UV formulations with SINOMER PETA?
Request samples, TDS, or technical support: info@sinocurechem.com
www.sinocurechem.com
+86 15668330235
Sinocure Chemical Group – Your trusted partner for specialty monomers and UV/EB curing raw materials.
