EBECRYL® 8209

EBECRYL® 8209 is a tin-free aliphatic urethane acrylate oligomer designed for fast curing when exposed to ultraviolet (UV) light or electron beam (EB). Here's a breakdown of its features, applications, and specifications:

Introduction:

• EBECRYL® 8209 offers rapid cure response with UV or EB exposure, resulting in high hardness, abrasion resistance, and solvent resistance in cured films.
• It is characterized by its light color, low viscosity, and excellent cure response.

Performance Data:

• UV/EB cured formulations with EBECRYL® 8209 exhibit good adhesion, scratch resistance, and lithographic properties.
• Performance properties depend on the selection of other formulation components such as reactive diluents, additives, and photo initiators.

Suggested Applications:

• Suitable for UV/EB curable formulations applied in lithographic, screen, gravure, direct or reverse roll, and curtain coating methods.
• Recommended for plastic coatings, lithographic applications, and coatings requiring good adhesion and scratch resistance.

Typical Values:

• Appearance: Clear liquid
• Höppler viscosity at 25°C: 4000 mPa.s
• Color, Gardner max: 2
• Hydroxyl value, mg KOH/g: 80 - 105

Physical Properties:

• Density, g/cm3: 1.12
• Molecular weight, theoretical (avg): Approximately 600
• Functionality, theoretical (average): 3.9
• Polymer solids, % by weight: 100

Typical Cured Properties:

• Tensile strength, psi (MPa): 2700 (19)
• Elongation at break, %: 1
• Young's modulus, psi (MPa): 348000 (2400)
• Glass transition temperature, °C: 145

Viscosity Reduction:

• Can be diluted with reactive monomers such as oligotriacrylate, 1,6-hexanediol diacrylate, tripropyleneglycol diacrylate, and trimethylolpropane triacrylate. The choice of diluent influences properties like hardness and flexibility.

Storage and Handling:

• Avoid prolonged exposure to temperatures exceeding 40°C or direct sunlight to prevent uncontrollable polymerization.
• Store in appropriate containers (stainless steel, amber glass, amber polyethylene, or baked phenolic lined).
• Use dry air to displace material removed from the container.
• Shelf life: Not recommended for storage for more than 2 years.

Precaution:

• Refer to the Safety Data Sheet for appropriate handling procedures and protective equipment.
• Follow emergency and first aid procedures outlined in the Safety Data Sheet.

EBECRYL® 8209 offers a versatile solution for fast-curing UV/EB formulations with excellent performance properties, making it suitable for various coating applications.