EBECRYL® 4859

EBECRYL® 4859 is a difunctional aliphatic urethane methacrylate used primarily in energy curable systems for coatings and printing applications. Here's a breakdown of its characteristics and applications as mentioned in the technical datasheet:

Introduction:

• EBECRYL® 4859 is formulated without intentionally added organic tin compounds, heavy metals, hydroquinone (HQ), or methyl ether of hydroquinone (MEHQ).
• It has a low intrinsic viscosity, making it suitable for formulating energy curable systems with low viscosity and high oligomer content.
• Films cured with EBECRYL® 4859 exhibit good hardness, optical clarity, low color, and impact resistance when exposed to ultraviolet light (UV) or electron beam (EB).

Performance Highlights:

• Does not contain intentionally added tin, heavy metals, or quinones.
• Low viscosity and light color.
• Cured products exhibit regulation-friendly properties regarding tin, heavy metals, and quinones.
• Provides abrasion resistance, chemical resistance, flexibility, toughness, impact resistance, and excellent outdoor durability.

Suggested Applications:

• Suitable for applications requiring compliance with regulations for tin, heavy metal, and quinone content.
• Used in ophthalmic lens casting, coatings on rigid and flexible plastics, wood coatings, and screen inks.
• Can be utilized as a diluent for higher viscosity urethanes.

Typical Physical Properties:

• Appearance: Clear liquid.
• Color: Apha < 100.
• Density at 25°C: 1.14 g/cm³.
• Theoretical functionality: 2.
• HQ/MEHQ Content: < 10 ppm/< 10 ppm (detected via HPLC with a UV detector).
• Oligomer content: 100% by weight.
• Viscosity at 25°C: 10000 mPa.s.

Typical Cured Properties:

• Tensile strength: 2050 psi (14 MPa).
• Elongation at break: 1%.
• Young’s modulus: 395000 psi (2700 MPa).
• Glass transition temperature: 136°C.

The datasheet also provides information on viscosity reduction with reactive diluents, precautions for storage and handling, and references to the Safety Data Sheet (SDS) for safety recommendations.