EBECRYL® 3702

EBECRYL® 3702 is characterized by:

• Low odor
• Excellent pigment wetting
• Good flow and leveling
• Good hydrophilic-lipophilic balance for lithography

UV/EB cured products based on EBECRYL® 3702 are characterized by the following performance properties:

• Good chemical and water resistance
• High gloss
• Greater flexibility than standard bisphenol A epoxy acrylates

The final 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® 3702 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 offset and screen printing. EBECRYL® 3702 is recommended for use in:

• Clear coatings for paper
• Overprint varnishes
• Lithographic ink vehicles
• Vehicles for metal decorating inks and clear coatings
• Screen ink vehicles
• Coatings for rigid and flexible plastics

Graph I - EBECRYL® 3702 - viscosity reduction with reactive diluents

Graph I shows the viscosity reduction of EBECRYL® 3702 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 avoiding solvent emissions. The specific reactive diluents used will influence performance properties such as hardness and flexibility.

Graph II - Ebecryl 3702 - viscosity vs. Temperature

Graph II illustrates the change in viscosity of EBECRYL® 3702 with increasing 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.