EBECRYL® 870

EBECRYL® 870 is a fatty acid modified polyester hexaacrylate used primarily in lithographic ink formulations. Here's a breakdown based on the provided technical datasheet:

Product Description:

• EBECRYL® 870 is a fatty acid modified polyester hexaacrylate known for its special backbone structure and high acrylic functionality.
• It offers the necessary hydrophilic-lipophilic balance for lithography and demonstrates high reactivity when cured by ultraviolet light (UV) or electron beam (EB).
• Lithographic inks formulated with EBECRYL® 870 display excellent printing qualities, including good ink transfer, dot definition, tack, and rheological properties.

Performance Highlights:

• Well-suited rheology for lithographic inks.
• Fast cure response.
• Low odor.
• Good pigment wetting.
• High abrasion resistance and hardness in cured products.
• Good solvent resistance.

Suggested Applications:

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

Typical Tack Ranges:

• EBECRYL® 870 exhibits tack ranging from 11-13 g-m when used alone or with various reactive diluents.

Specifications:

• Acid value: Max. 15 mg KOH/g
• Appearance: Dark clear liquid
• Viscosity at 25°C: 35000 - 50000 mPa.s

Typical Properties:

• Functionality (theoretical): 6
• Density at 25°C: 1.08 g/cm³
• Oligomer content: > 95% by weight

Typical Cured Properties:

• Tensile strength: 4500 psi (31 MPa)
• Elongation at break: 5%
• Glass transition temperature: 41°C

Viscosity Reduction and Storage:

• Viscosity reduction with reactive diluents is illustrated in Graph I.
• Graph II shows the change in viscosity with increasing temperature.
• Proper precautions for storage and handling are necessary to prevent uncontrollable polymerization.

Safety and Handling:

• Detailed safety instructions can be found in the Safety Data Sheet (SDS).
• Storage and handling recommendations include avoiding exposure to high temperatures, direct sunlight, ignition sources, and certain chemicals.

EBECRYL® 870 is a versatile component in lithographic ink formulations, offering excellent performance properties and flexibility in application. Users should adhere to recommended procedures for optimal results and safety.