OPTOLINQ LE-EP246D | Optically Transparent Epoxy Resin

Harmonization Code : 3907.30.00.90 |   Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms : Epoxide resins : Other
Main features
  • Low working time and viscosity
  • Perfect surface gloss
  • Good chemical resistance

Product Description

OPTOLINQ LE-EP246D is a two-component, low viscosity epoxy with excellent handling properties, chemical resistance, and high-gloss finish. It is ideal for potting, casting, sealing, encapsulation, and adhesive applications in electronic components, as well as for general industrial uses requiring extended work life.

The hardener of LE-EP246D does not form insoluble, white solids even after being exposed to air. The cured surface remains oil-free while maintaining excellent gloss retention. Additionally, OPTOLINQ LE-EP246D offers excellent electrical insulation properties under high humidity conditions, withstands exposure to a wide range of chemicals and solvents, and complies to RoHS 2011/65/EU Directive.

Applications

  • Potting, casting, and encapsulation of electronic components
  • General industrial sealing and coating applications
  • Adhesive for transparent, chemical-resistant assemblies
  • Applications requiring extended work life, chemical resistance, and optical clarity

 

Product Family
LE-EP246D  
Bottle

Catalog Product

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Packaging
TDS, SDS & Technical documents

Technical Specifications

General Properties
Appearance
Appearance
Appearance at room temperature.
 Liquid, colorless
Mix Ratio
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
 100:33
Pot Life
Pot Life
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed.

It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
 8 hours
Refractive index
Refractive index
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material.

The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
 1.532
Physical Properties
Viscosity
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
 262.5 mPa.s
Chemical Properties
Water Absorption 1.59 %
Electrical Properties
Dielectric Constant
Dielectric Constant
Dielectric Constant (k), commonly known as relative permittivity, is a number relating the ability of a material to carry alternating current to the ability of vacuum to carry alternating current.

It determines the ability of an insulator to store electrical energy and is the ratio of electric permeability in vacuum against the electric permeability of a material.

The lower the dielectric constant (κ) and dissipation factor, the less energy is absorbed from an electric field, making it a much better insulator.

It is a dimensionless property that can be affected by various factors such as the thickness uniformity of a material, insufficient contact between the sample and electrodes, water adsorption and contact resistance.
Dielectric Constant @ 25 ˚C/100 kHz 4.1
Surface Resistivity 5e14 Ohms/sq
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
 4.5x1015 Ohms⋅cm
Mechanical Properties
Hardness
Hardness
Hardness is a dimensionless quantity. There is no direct relationship between measurements in one scale and their equivalent in another scale or another hardness test.
Durometer (Shore D) 82
Elongation
Elongation
Elongation is the process of lengthening something.

It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.

It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
 10 %
Shear strength
Shear Strength 17.6 N/mm2
Tensile Modulus
Tensile Modulus
Tensile modulus is a mechanical property that measures the stiffness of an elastic material. It is the slope of stress / strain curve of a material under direct tensile loading.

It can be used to predict the elongation or elastic deformation of an object as long as the stress is less than the tensile strength of the material. Elastic deformation is caused by stretching the bonds between atoms and the deformation can be reversed when the load is removed.

Tensile modulus is affected by temperature and is an important engineering attribute since we generally want to keep elastic deformation as small as possible.
Tensile Modulus @25°C 900 N/mm2
Tensile Strength
Tensile Strength
The tensile strength of a material is the maximum amount of tensile stress that it can withstand while being stretched or pulled before failure.

Some materials break very sharply, without plastic deformation, in what is called a brittle failure. Others, which are more ductile, including most metals, experience some plastic deformation and possibly necking before fracture.
Tensile Strength
Tensile Strength
Tensile strength determines the resistance of a material to break under tension and it measures how much elongating load (or tensile stress) it can handle before fracture.

To make it simple, it measures how much force we have to apply when pulling apart a material before it breaks.
 50 MPa
Thermal Properties
Coefficient of Thermal Expansion (CTE)
Coefficient of Thermal Expansion (CTE)
CTE (Coefficient of thermal expansion) is a material property that is indicative of the extent to which a material expands with a change in temperature. This can be a change in length, area or volume, depending on the material.

Knowing the CTE of the layers is helpful in analyzing stresses that might occur when a
system consists of an adhesive plus some other solid component.
Coefficient of Thermal Expansion (CTE) , α1
Coefficient of Thermal Expansion (CTE) , α1
CTE α1 (alpha 1) is the slope of the Coefficient of thermal expansion in a temperature range below the Glass transition temperature (Tg).

It explains how much a material will expand until it reaches Tg.
 38 ppm/°C
Coefficient of Thermal Expansion (CTE), α2
Coefficient of Thermal Expansion (CTE), α2
CTE α2 (alpha 2) is the slope of the Coefficient of thermal expansion in a temperature range above the Glass transition temperature (Tg).

It explains the extent to which a material will expand after it passes Tg.
 230 ppm/°C
Degradation temperature
Degradation temperature
The temperature at which the materials start losing their properties
 324 °C
Glass Transition Temperature (Tg)
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.

The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
 90 °C

Additional Information

LE-EP246D Additional Technical Specifications

Property Value Unit

Spectral Transmission

at 1,200-4,000 nm

at 900-1,200 nm

at 550-900 nm

80

80

>96

 %

Toughness

5

 J/m2

Notched Izod Impact Strength

5.9

 J/m

LE-EP246D Recommended Curing Conditions

Property Value Unit
Mixing Ratio (A:B) 100:33 by weight
Pot Life (25℃) 8 hour(s)
Through Cure Time (25℃) 5-7 day(s)
Through Cure Time (80℃) 3 hour(s)