EBECRYL® 3720

EBECRYL® 3720 is characterized by:

• Light color
• Fast cure response
• Good stability

UV/EB cured properties based on EBECRYL® 3720 are characterized by the following performance properties:

• High gloss
• Excellent chemical resistance
• High surface hardness

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® 3720 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® 3720 is recommended for use in:

• Paper upgrading
• Overprint varnishes
• Screen inks
• Wood sealers
• Fast cure coatings
• Laminating adhesives
• Coatings for paper, paperboard, wood, chipboard and rigid plastics

Graph I shows the viscosity reduction of EBECRYL® 3720 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 or ink, thus reducing solvent emissions. The specific reactive diluents used will influence performance properties such as hardness and flexibility.

GRAPH I
EBECRYL® 3720 - Viscosity Reduction With Reactive Diluents

Graph II illustrates the change in viscosity of EBECRYL® 3720 with increasing temperature.

GRAPH II
EBECRYL® 3720 - 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.