EBECRYL® 3720-TP25

EBECRYL® 3720-TP25 is characterized by:

• Light color
• Low viscosity
•  Fast cure response

UV/EB cured properties based on EBECRYL® 3720-TP25 are characterized by the following performance properties:

• Good surface hardness
• High gloss
• Good chemical resistance

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-TP25 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-TP25 is recommended for use in:

• Overprint varnishes
• Coatings for wood, chipboard, paper and rigid plastics
• Paper upgrading
• Screen print inks and coatings 
• Adhesive for paper laminations 
• Wood fillers

Graph Ishows the viscosity reduction of EBECRYL® 3720-TP25 with 1,6-hexanediol diacrylate (HDDA) product of allnex, isobornyl acrylate (IBOA) product of allnex, trimethylolpropane triacrylate (TMPTA) product of allnex, 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 II illustrates the change in viscosity of EBECRYL® 3720-TP25 with increasing temperature.

Graph I: Viscosity Reduction With Reactive Diluent

Graph II: 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.