EBECRYL® 4859

EBECRYL® 4859 is characterized by:

• No intentionally added tin, heavy metals, or quinones
• Low viscosity
• Light color

UV/EB cured products containing EBECRYL® 4859 are characterized by the following performance properties:

• Regulation friendly for tin, heavy metals, and quinones
• Abrasion resistance & Chemical resistance
• Flexibility
• Toughness & Impact resistance
• Excellent outdoor durability

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® 4859 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 flexographic and screen printing. EBECRYL® 4859 is recommended for:

• Applications that must meet regulations for tin, heavy metal, and quinone content
• Ophthalmic lens casting
• Coatings on rigid and flexible plastics
• Use as a diluent for higher viscosity urethanes
• Wood coatings
• Screen inks

Graph I - EBECRYL® 4859 - Viscosity reduction with reactive diluents

Graph I shows the viscosity reduction of EBECRYL® 4859 with 1,6-hexanediol diacrylate (HDDA), isobornyl acrylate (IBOA), tripropylene glycol diacrylate (TPGDA) and trimethylolpropane triacrylate (TMPTA). 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 II - EBECRYL® 4859 - Viscosity vs. Temperature

Graph II illustrates the change in viscosity of EBECRYL® 4859 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.