EBECRYL® 225

EBECRYL®® 225 is characterized by:

• Light color
• Liquid at room temperature
• Regulation friendly for tin, heavy metals*, and quinones (Please note that quinones are present in many raw materials, so the overall quinone content is reduced, but not zero in EBECRYL®® 225)

UV/EB cured products containing EBECRYL®® 225 are characterized by the following performance properties:

• Outstanding hardness
• Outstanding scratch and abrasion resistance
• Outstanding steel wool (0000) scratch resistance
• Excellent cure response

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®® 225 may be applied via brush, roller, 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®® 225 is recommended for use:

• Hard coatings for plastics and optical films
• In applications that must meet regulations for tin, heavy metal*, and quinone content.
• As an additive to improve cure speed, solvent resistance, scratch resistance and abrasion resistance.
• In clear and pigmented coatings for paper, paperboard, wood, rigid plastics, filmic substrates.

Graph I shows the viscosity reduction of EBECRYL®® 225 with 1,6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), trimethylolpropane triacrylate (TMPTA), and butyl acetate. Although viscosity reduction can be achieved with non-reactive solvents, reactive diluents are preferred because they are essentially 100percent converted during UV/EB exposure to form a part of the coating or ink, thus reducing solvent emissions. The specific reactive diluents used will influence performance properties such as hardness and flexibility.

GRAPH I
Ebecryl® 225 - Viscosity Reduction With Reactive Diluents

Graph II illustrates the change in viscosity of EBECRYL®® 225 with increasing temperature.

GRAPH II
EBECRYL®® 225 - 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.