Dymax OP-81-LS Low Shrinkage Epoxy, Off White Opaque to Charcoal Translucent Gel, Hybrid UV, LED & Heat Cure - 3ml Syringe

The Dymax Low-Shrink™ OP-81-LS Hybrid UV & Heat Cure Epoxy is a UV/Visible light-curable epoxy that features very low volumetric shrinkage during curing, offering excellent stability through thermal excursions due to its low CTE. This makes it ideal for the rapid positioning of optical components. Specially formulated to primarily cure with UV light, OP-81-LS epoxy also includes a low-temperature heat-curing (80-85°C) option, which is perfect for applications involving shadow areas or situations where heat cure alone is preferred.

This Dymax UV-curing epoxy product is also compliant with RoHS standards, aligning seamlessly with directives 2015/863/EU for environmental responsibility. Epoxy is packaged in a 3ml syringe.

Features of OP-81-LS:

• Single component, No Mixing Required
• UV/Visible Light Cure
• Low Shrinkage and Low CTE
• Cold ship/Cold storage at 1-5°C
• Passes NASA Low Outgassing Requirements (ASTM E595)
• Recommended surfaces: Polycarbonate, Glass, Acrylic, and Metallic Surfaces

Applications:

• Optical Positioning
• Lens and Prism Alignment
• Fiber Positioning

Uncured Properties:

• Viscosity: 60,000 cP
• Solvent Content: No Nonreactive Solvents
• Appearance: Off-White to Light Gray Opaque Gel
• Soluble in: Organic Solvents
• Density: 1.6 g/ml

Cured Mechanical Properties:

• Durometer Hardness: D90
• Tensile at Break: 45 MPa (6,600 psi)
• Elongation at Break: 2%
• Modulus of Elasticity: 1,600 MPa (230,600 psi)

Other Cured Properties:

• Glass Transition Temperature, Tg: 153°C
• Coefficient of Thermal Expansion (CTE)
  • α1: 25 µm/m/°C
  • α2: 97 µm/m/°C
• Boiling Water Absorption (2 h): 0.9%
• Water Absorption (25°C, 24 h): 0.1%
• Volumetric Shrinkage: 1.5%

Low Outgassing Properties (ASTM E595):

• Total Mass Loss (TML): 0.37%
• Collected Volatile Condensable Material (CVCM): 0.01%