EBECRYL® 8807

EBECRYL® 8807 is an aliphatic urethane diacrylate known for its rapid surface cure response, light color, and moderate viscosity. Here's a detailed overview of its characteristics and applications:

Product Description:

• Aliphatic urethane diacrylate with rapid surface cure response.
• Suitable for ultraviolet light (UV) or electron beam (EB) curing.

Performance Highlights:

• Moderate viscosity and light color.
• UV/EB cured products based on EBECRYL® 8807 exhibit excellent surface cure in air, good flexibility, toughness, abrasion resistance, and resistance to yellowing.
• Actual properties depend on formulation components like reactive diluents, additives, and photoinitiators.

Suggested Applications:

• Suitable for various application methods including direct or reverse roll, offset gravure, metering rod, slot die, knife over roll, air knife, curtain, and immersion coating methods.
• Recommended for coatings for wood, cement, and composite flooring, adhesives or sealants cured with low-intensity lamps, and flexible coatings requiring rapid cure in air.

Surface Cure Response Comparison (Table I):

• EBECRYL® 8807 exhibits a significantly lower UV dose requirement for achieving surface cure compared to other acrylated aliphatic urethanes.

Specifications:

• Appearance at elevated temperature: Clear liquid
• Color, Gardner: Maximum 1
• NCO content, %: Maximum 0.2
• Viscosity at 60°C: 5600 - 9400 mPa.s

Typical Physical Properties:

• Density at 25°C: 1.05 g/cm³
• Functionality, theoretical: 2
• Oligomer content, % by weight: 100

Typical Cured Properties:

• Tensile strength: 1950 psi (13 MPa)
• Elongation at break: 54%
• Young’s modulus: 7500 psi (52 MPa)
• Glass transition temperature: 32°C

Viscosity Reduction:

• Graph I illustrates viscosity reduction of EBECRYL® 8807 with reactive diluents like 1,6-hexanediol diacrylate (HDDA), trimethylolpropane triacrylate (TMPTA), and tripropylene glycol diacrylate (TPGDA).

Storage and Handling:

• Store in suitable containers like stainless steel, amber glass, amber polyethylene, or baked phenolic lined containers.
• Avoid exposure to high temperatures, direct sunlight, ignition sources, oxidizing agents, alkalis, or acids to prevent uncontrollable polymerization.
• Crystallization may occur upon storage, which can be removed by heating containers to a uniform temperature of 60°C.
• Follow recommended storage temperature range as specified in the Safety Data Sheet (SDS).

EBECRYL® 8807 offers a versatile solution for coatings and adhesives requiring rapid cure, excellent surface properties, and resistance to yellowing.