allnex HDDA

HDDA stands for Hexanediol diacrylate. It's a difunctional reactive diluent commonly used in ultraviolet light (UV) and electron beam (EB) curable coatings and inks. Here's a breakdown of its key characteristics and applications:

Performance Highlights:

• Very low viscosity
• Low color
• Efficient reduction of oligomer viscosity
• UV/EB curable formulated products containing HDDA exhibit:
  • Improved elasticity
  • Improved weathering
  • Good cure response at low cross-link density
  • Improved adhesion
  • Good water resistance

Suggested Applications:

• Improved adhesion to plastics, metal, and glass
• Exterior durable coatings and inks

Specifications:

• Acid value: max. 0.4 mg KOH/g
• Appearance: Clear liquid
• Color: max. 40 Apha
• Residual solvent: max. 0.09 wt.%
• Viscosity at 25°C: 5 - 8 mPa.s
• Water content: max. 0.1 wt.%

Typical Physical Properties:

• Density at 25°C: 1.02 g/cm³
• Flash point (Setaflash): > 100°C
• Formula weight: 226

Typical Cured Properties:

• Tensile strength: 5080 psi (35 MPa)
• Elongation at break: 2%
• Young's modulus: 246500 psi (1700 MPa)
• Glass transition temperature: 48°C

Precautions: Before using HDDA, it's essential to refer to the Safety Data Sheet (SDS) for information on identified hazards, recommended personal protective equipment, and procedures.

Storage and Handling: Care should be taken to avoid exposure to high-temperature conditions, direct sunlight, ignition sources, oxidizing agents, alkalis, or acids, as they may cause uncontrollable polymerization of the product. Proper storage containers and procedures are recommended to prevent crystallization. Heating methods are suggested for removing crystallization.