LOCTITE EA E-40EXP

Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics

LOCTITE EA E-40EXP

Main features

  • Self-Leveling Horizontal Potting
  • Controlled 2:1 Metered Mixing
  • Room-Temperature Potting Cure

Product Description

LOCTITE EA E-40EXP is a two-component, self-leveling epoxy potting compound for electric motors and wire-conduit isolation. The white resin and black amine hardener mix at 2:1 by volume to form a black material that flows through horizontal cavities and cures at room temperature. Typical mixed-material values include a gel time below 45 minutes at 22 deg C and a tack-free time of 75 minutes or less. After seven days at 25 deg C, the cured epoxy reaches greater than 80 Shore D hardness and provides 38 kV/mm dielectric breakdown strength.

Key features

  • Self-leveling cavity fill: The mixed epoxy flows into horizontal voids and supports bottom-up potting.
  • Controlled 2:1 mixing: Resin and hardener use a 2:1 volume ratio for cartridge or bulk-metered dispensing.
  • Room-temperature cure: The system cures at room temperature, with heat acceleration up to 93 deg C.

Applications

Applications include potting wire conduits and electrical motor areas where a self-leveling two-component epoxy is specified.

Product Family

LOCTITE EA E-40EXP

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
White liquid / Black liquid
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two (Resin / Hardener)
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
100 : 45.9
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.2 / 1.1
Mechanical Properties
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.
4 %
Thermal Properties
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.
52 °C

Additional Information

Technical properties

As-supplied properties

Resin, hardener and mixed-system values before cure.

Property Value Unit Method / condition
Mix ratio by volume2:1Resin to hardener
Mix ratio by weight100:45.9Resin to hardener
Resin viscosity20,800mPa sBrookfield DV-II, spindle 14, 10 rpm, 25 deg C
Hardener viscosity6,400mPa sBrookfield RVT, spindle 14, 10 rpm, 25 deg C
Mixed specific gravity1.2At 25 deg C
Tack-free time75 or lessminutesMixed material
Gel timeLess than 45minutesAt 22 deg C
Optimal storage8 to 21deg CUnopened container in a dry location
Technical properties

Final-state properties

Typical cured-material values after 7 days at 25 deg C unless otherwise stated.

Property Value Unit Method / condition
Shore hardnessGreater than 80Shore DISO 868; cured 7 days at 25 deg C
Glass transition temperature52deg CASTM E1640; cured 7 days at 25 deg C
Coefficient of thermal expansion26 x 10^-6 pre-Tg; 151 x 10^-6 post-TgK^-1ISO 11359-1
Tensile strength66N/mm^2ISO 527-2; cured 7 days at 25 deg C
Tensile modulus2,750N/mm^2ISO 527-2; cured 7 days at 25 deg C
Elongation4%ISO 527-2; cured 7 days at 25 deg C
Thermal conductivity0.25W/(m K)ASTM E1530; cured 7 days at 25 deg C
Dielectric breakdown strength38kV/mmIEC 60243-1; cured 7 days at 25 deg C

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