EBECRYL® 246/20 HEMA

EBECRYL® 246/20 HEMA is a difunctional aliphatic urethane acrylate diluted in 20 parts of HEMA (2-hydroxyethyl methacrylate). It's commonly used in electron beam (EB) or ultraviolet light (UV) curing processes for coatings and inks. Here are the key details:

Introduction:

• EBECRYL® 246/20 HEMA does not contain intentionally added organic tin compounds, heavy metals, or quinones (though quinones may be present in some raw materials).
• Films cured by EB or UV exhibit excellent abrasion resistance, toughness, flexibility, and resistance to yellowing.

Performance Highlights:

• No intentionally added tin, heavy metals, or quinones.
• Light color and low odor.
• UV/EB cured products based on EBECRYL® 246/20 HEMA exhibit:
  • Excellent flexibility
  • Excellent non-yellowing
  • High scuff and abrasion resistance
  • Good exterior durability

Suggested Applications:

• Clear coatings for paper
• Clear coatings on flexible and semi-rigid plastics
• Silk screen inks
• Flexibilizer in solder resists
• Wood top coats

Typical Values:

• Brookfield viscosity at 25°C: ~30,000 mPa.s
• Gardner color: max. 1

Physical Properties:

• Density: 1.09 g/cm³
• Molecular weight: Theoretical 1600
• Functionality: Theoretical 2
• Polymer solids: 80% by weight

Viscosity Reduction:

• Can be diluted with various reactive monomers such as 1,6-hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), trimethylolpropane triacrylate (TMPTA), oligotriacrylate (OTA 480), tetraethylene glycol diacrylate (TTEGDA), and octyl/decyl acrylate (ODA).

Storage and Handling:

• Avoid exposure to temperatures exceeding 40°C for prolonged periods or direct sunlight to prevent uncontrollable polymerization.
• Store in appropriate containers such as stainless steel, amber glass, or amber polyethylene.
• Use dry air to displace material removed from the container.
• Do not store for more than 2 years.

Precautions:

• The toxicological properties are not fully determined, but it can be expected to be eye and skin irritant and may cause sensitization or other allergic responses.
• Follow appropriate handling procedures and protective equipment as outlined in the Safety Data Sheet.

In summary, EBECRYL® 246/20 HEMA is a versatile material used in various UV/EB curable products, offering excellent performance properties and suitable for a range of applications in coatings and inks.