EBECRYL® 2221

EBECRYL® 2221 is a tin-free urethane acrylate oligomer known for its fast cure response when exposed to ultraviolet light (UV) or electron beam (EB). Here's an overview of its specifications, performance highlights, suggested applications, and precautions:

Introduction:

• EBECRYL® 2221 is a hexafunctional aromatic urethane acrylate oligomer belonging to the ECOWISE™ CHOICE product range for selected applications.

Performance Highlights:

• Good surface hardness
• Good solvent resistance
• High gloss
• Fast cure speed

Suggested Applications:

• Wood coatings and fillers
• Lithographic inks
  • Used to improve cure speed, scratch, and solvent resistance

Typical Values:

• Viscosity at 25°C: 18,000 - 24,000 mPa.s
• Color, Gardner max: 2

Physical Properties:

• Density: 1.18 g/cm³
• Molecular weight, theoretical: ± 1200
• Functionality, theoretical: 6
• Polymer solids, % by weight: 100

Typical Cured Properties:

• Tensile strength: 21.1 MPa
• Tensile elongation: 1.2%
• Young Modulus: 1820 MPa
• Tg (by DMTA- max tg δ): 120°C

Viscosity Reduction:

• EBECRYL® 2221 can be diluted with reactive monomers such as EBECRYL® 40, trimethylolpropane triacrylate (TMPTA), tripropylene glycol diacrylate (TPGDA), and 1,6-hexanediol diacrylate (HDDA).

Storage and Handling:

• Avoid exposing radiation curable products to temperatures exceeding 40°C for prolonged periods or direct sunlight.
• Store and handle in appropriate containers such as stainless steel, amber glass, amber polyethylene, or baked phenolic lined containers.
• Use dry air to displace material removed from the container.
• Shelf life: Not recommended to store for more than 2 years after the production date.

Precautions:

• Toxicological properties of this material have not been fully determined. It can be an eye and skin irritant and may cause sensitization or other allergic responses.
• Take appropriate precautions to avoid eye and skin contact and inhalation of aerosols or vapors.
• Consult the relevant Safety Data Sheet for handling procedures and protective equipment.
• Refer to Safety Data Sheet for emergency and first aid procedures.

In summary, EBECRYL® 2221 offers fast cure response and excellent properties suitable for various applications such as wood coatings, fillers, and lithographic inks, where high surface hardness, solvent resistance, and gloss are desired.