EBECRYL® 244

EBECRYL® 244 is characterized by:

• Light color
• Crystalline viscous liquid

UV/EB cured products based on EBECRYL® 244 are characterized by the following performance properties:

• Good flexibility and toughness
• Excellent abrasion resistance
• Good water, thermal and electrical resistance
• Non-yellowing

The actual properties of UV/EB cured products also depend on the selection of other formulation components such as reactive diluents, additives and photoinitiators.

Formulated UV/EB curable products containing EBECRYL® 244 may be applied via direct or reverse roll, offset gravure, metering rod, slot die, knife over roll, air knife, curtain, immersion and spin coating methods, as well as screen printing.
EBECRYL® 244 is recommended for use in:

• Flexible screen inks and coatings
• Light stable coatings
• Electrical insulation coatings
• Coatings where a minimum of water absorption is desired (absorbs less than 1% water/24 hr. immersion)

Graph I - EBECRYL® 244 - Viscosity reduction with reactive diluents

Graph I shows the viscosity reduction of EBECRYL® 244 with 1,6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), trimethylolpropane triacrylate (TMPTA), and tripropylene glycol diacrylate (TPGDA). Although viscosity reduction can be achieved with non-reactive solvents, reactive diluents are preferred because they are essentially 100 percent converted during UV/EB exposure to form a part of the coating, thus reducing solvent emissions. The specific reactive diluents used will influence performance properties such as hardness and flexibility. Graph I illustrates the change in viscosity of EBECRYL® 244 with increasing temperature.

Graph II - EBECRYL® 244 - Viscosity vs. Temperature

• Care should be taken not to expose the product to high temperature conditions, direct sunlight, ignition sources, oxidizing agents, alkalis or acids.
• This might cause uncontrollable polymerization of the product with the generation of heat.
• Storage and handling should be in stainless steel, amber glass, amber polyethylene or baked phenolic lined containers. Procedures that remove or displace oxygen from the material should be avoided.
• Do not store this material under an oxygen free atmosphere.
• Dry air is recommended to displace material removed from the container. Wash thoroughly after handling. Keep container tightly closed. Use with adequate ventilation.