Acrylates, High-Purity Solvents

Pentaerythritol Triacrylate (PETA)

Pentaerythritol Triacrylate, designated 3524-68-3, is a multifunctional monomer characterized by its high reactivity and ability to form dense cross-linked networks. As a trifunctional acrylate monomer, PETA possesses three acrylic groups attached to a pentaerythritol core, which facilitates rapid polymerization under ultraviolet or electron beam radiation. Chemically, it exists as a clear, yellowish liquid with a distinct odor and relatively low volatility. Its molecular structure allows for significant versatility in tailoring the mechanical and thermal properties of finished polymers. PETA is prized for its excellent solvency and compatibility with various resins, contributing to enhanced hardness, abrasion resistance, and chemical stability in protective coatings. However, due to its reactive nature, it requires stabilizers such as hydroquinone to prevent premature polymerization. Understanding its refractive index and viscosity is critical for precise industrial applications. This monomer serves as a cornerstone in high-performance radiation-curable systems, bridging the gap between monomeric fluidity and robust polymer strength.

Attributes

Key Features and Benefits

High Reactivity: The trifunctional nature ensures exceptionally fast curing rates when exposed to UV light or heat initiators.
Low Volatility: Its high molecular weight minimizes evaporation during application, reducing VOC emissions and workplace exposure risks.
Cross-linking Efficiency: Provides dense polymer networks that significantly improve the tensile strength and toughness of the cured material.
Chemical Resistance: Offers superior protection against solvents, acids, and bases due to its tightly knit molecular structure.
Hardness Enhancement: Effectively increases surface hardness and scratch resistance, making it ideal for high-wear environments and protective finishes.

Specifications

Technical Highlights

Molecular Formula: Defined as C14H18O7 with a calculated molecular weight of approximately 298.29 grams per mole for pure triacrylate.
Viscosity Range: Typically exhibits a viscosity between 500 to 1,000 mPa.s at 25 degrees Celsius, depending on the isomer purity.
Refractive Index: Maintains a refractive index of approximately 1.48, which influences the optical clarity of the final cured coatings.
Boiling Point: Features a high boiling point exceeding 200 degrees Celsius at atmospheric pressure, ensuring thermal stability during high-temperature processing.
Purity Levels: Commercial grades often contain a mixture with tetraacrylate to balance specific performance characteristics like flexibility and hardness.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

UV-Curable Inks: Used extensively in lithographic and screen printing inks to ensure rapid drying and excellent adhesion to substrates.
Wood Coatings: Applied in high-gloss furniture finishes to provide a durable, scratch-resistant surface that withstands daily wear and tear.
Adhesive Formulations: Incorporated into pressure-sensitive and structural adhesives to enhance bonding strength and environmental resistance across various industrial sectors.
Electronics Encapsulation: Serves as a primary component in photoresists and solder masks for printed circuit boards, offering high precision and stability.
Plastic Finishes: Utilized in coatings for automotive interiors and consumer electronics to provide a premium feel and long-lasting aesthetic appeal.