EBECRYL® 870

EBECRYL® 870 is characterized by:

• Rheology suited for lithographic inks
• Fast cure response
• Low odor
• Good pigment wetting
• Good lithographic behavior

UV/EB cured products containing EBECRYL® 870 are characterized by the following performance properties:

• High abrasion resistance
• Good hardness
• Good solvent 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® 870 may be applied via lithographic, screen, gravure, direct or reverse roll, and curtain coating methods.
EBECRYL® 870 is recommended for:

• Fast curing lithographic inks and clear varnishes
• Improving lithographic behavior as an additive

Graph I - EBECRYL® 870 - Viscosity reduction with reactive diluents

Graph I show the viscosity reduction of EBECRYL® 870 with the reactive diluents EBECRYL® 140 (ditrimethylolpropane tetraacrylate), EBECRYL® 150 (ethoxylated bisphenol A diacrylate), EBECRYL® 40 and OTA-480. 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® 870 - Viscosity vs. Temperature

Graph II illustrates the change in viscosity of EBECRYL® 870 with increasing temperature.

Note:

• * - 400 rpm, 90°F, 3 minutes; Thwing-Albert Electronic Inkometer
• ⁽¹⁾ - OTA-480 (propoxylated glycerol triacrylate) and TPGDA (tripropylene glycol diacrylate) are products of Allnex.

• 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.