EBECRYL® 3639

EBECRYL® 3639 is a flexible epoxy acrylate designed for radiation-curable coatings and inks, offering a balance of flexibility, reactivity, scratch resistance, and chemical resistance. Here's a breakdown of its characteristics and applications:

Introduction:

• EBECRYL® 3639 is a special epoxy acrylate with good flexibility and very high reactivity.
• It is recommended for formulating radiation-curable coatings and inks with excellent flexibility, reactivity, scratch resistance, and chemical resistance.
• Typical applications include flexo inks, screen inks, overprint varnishes, resilient flooring coatings, paper upgrading, coatings on plastics, and coatings on wood.

Performance Highlights:

• Medium viscosity and light color.
• Very high reactivity suitable for UV cured inks and coatings.
• UV cured products based on EBECRYL® 3639 exhibit high flexibility, excellent scratch resistance, and outstanding chemical resistance.

Typical Values:

• Cone and plate viscosity at 25 °C: 15.5 Pa.s
• Color: Gardner max. 2
• DPGDA content: 30 to 35%

Physical Properties:

• Density: 1.15 g/cm³
• Theoretical molecular weight: 1800 g/mol
• Theoretical functionality: 2

Viscosity Reduction:

• EBECRYL® 3639 can be diluted with reactive diluents such as 1,6-hexanediol-diacrylate (HDDA), trimethylolo-propane triacrylate (TMPTA), tripropyleneglycol diacrylate (TPGDA), and OTA 480. The choice of reactive diluent(s) influences properties like hardness and flexibility.

Mechanical Properties:

• Stress-strain properties of EBECRYL® 3639 compared to other flexible radiation-curable oligomers are depicted in a graph, showing its performance in terms of flexibility.

Storage and Handling:

• Avoid exposing radiation-curable products to temperatures exceeding 40°C for prolonged periods or direct sunlight to prevent uncontrollable polymerization.
• Store in appropriate containers and conditions, and avoid storing for more than 2 years.

Precautions:

• Take appropriate precautions to avoid eye and skin contact and inhalation of aerosols or vapors.
• Consult the Safety Data Sheet for handling procedures, protective equipment, emergency, and first aid procedures.

EBECRYL® 3639 offers a versatile solution for radiation-curable coatings and inks, providing flexibility, reactivity, and resistance properties suitable for various applications.