EBECRYL® 1259

EBECRYL® 1259 is an acrylated aliphatic urethane oligomer diluted with 35% of hydroxy propyl methacrylate (HPMA), primarily used in solder resist coatings on printed circuit boards. It can be cured by ultraviolet light (UV) or electron beam (EB). Here's a breakdown of its key features and specifications:

Introduction:
EBECRYL® 1259 is designed for use in solder resist coatings on printed circuit boards, offering the ability to be cured by UV or EB methods.

Performance Highlights:

• Light color
• Low viscosity
• UV/EB cured products based on EBECRYL® 1259 offer improved flexibility and good heat resistance. However, the actual properties depend on the selection of other formulation components.

Suggested Applications:

• Solder resists with improved adhesion and flexibility on tin-lead
• Thick film casting

Typical Values:

• Höppler viscosity at 25°C: ± 12000 mPa.s
• Color, Gardner: max. 2

Physical Properties:

• Density: 1.07 g/cm3
• Molecular weight, theoretical: 2000
• Functionality, theoretical: 3
• Polymer solids, % by weight: 65
• HPMA, % by weight: 35

Viscosity Reduction:
EBECRYL® 1259 can be diluted with reactive monomers such as trimethylolpropane triacrylate (TMPTA) and EBECRYL® 109. The choice of reactive diluent(s) can influence properties such as hardness and flexibility.

Typical Cured Properties:

• Tensile strength: 25 MPa
• Tensile elongation: 99%
• Glass transition temperature: 43°C

Storage and Handling:
Avoid exposing EBECRYL® 1259 to temperatures exceeding 40°C for prolonged periods or direct sunlight, as this may cause uncontrollable polymerization. Store in suitable containers and use dry air to displace material removed from the container. Shelf life should not exceed 2 years.

Precautions:
EBECRYL® 1259 can be irritant to the eyes and skin and may cause sensitization or other allergic responses. Proper precautions should be taken to avoid contact and inhalation of aerosols or vapors. Refer to the Safety Data Sheet for detailed handling procedures and protective equipment recommendations.