LOCTITE EA E-40HT

Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other

HYSOL E-40HT

Main features

  • Extended-Work-Life Structural Bonding
  • Elevated-Temperature Epoxy Bonding
  • Tough Shear- and Impact-Resistant Bondline

Product Description

LOCTITE EA E-40HT is a two-part structural epoxy adhesive that mixes 2:1 resin to hardener by volume and cures at room temperature to form a tough bondline with elevated-temperature resistance. Extended work life provides a longer assembly window before cure. Fixture time on grit-blasted steel is 165 to 180 minutes at 22 deg C using a 0.1 N/mm^2 threshold. The cured adhesive provides shear performance on aluminum, steel, stainless steel, and other metals. Additional bonding substrates include selected plastics, glass, and ceramics, while the cured bondline also provides electrical insulation and impact resistance.

Key features

  • Extended Structural Assembly Window: Apply the mixed adhesive within 40 minutes; larger quantities and higher temperatures reduce the working time.
  • Heat-Aging Strength Retention: After a five-day cure at 22 deg C and 1000 hours at 150 deg C, typical lap shear strength retention is 130% of initial strength on grit-blasted steel with a 0.13 mm bondline, tested at 22 deg C.
  • Tough structural bondline: The cured adhesive combines shear performance with impact resistance in the final bondline.

Applications

Suitable structural-bonding substrates include glass, ceramics, selected plastics, aluminum, steel, stainless steel, and other metals.

Product Family

LOCTITE EA E-40HT

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
Off-White
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
2:1
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.
1.13
Physical Properties
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
16000 mPa.s
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.
57 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Resin, hardener, and mixed values are shown separately.

PropertyValueUnitMethod / condition
Mix ratio, resin : hardener2 : 1By volume
Mix ratio, resin : hardener100 : 43By weight
Resin viscosity107,000mPa sTypical; cone and plate; 25 deg C; CP50-1; 100 s^-1
Hardener viscosity6,200mPa sTypical; cone and plate; 25 deg C; CP50-1; 100 s^-1
Mixed viscosity16,000mPa sTypical; cone and plate; 25 deg C; CP50-1; 100 s^-1
Fixture time, grit-blasted steel165 to 180minTypical; 22 deg C; 0.1 N/mm^2 threshold; ISO 4587
Technical properties

Cured / final-state properties

PropertyValueUnitMethod / condition
Glass transition temperature, Tg57deg CTypical; ISO 11359-2; cured 5 days at 22 deg C
Shore hardness79Shore DTypical; ISO 868; cured 5 days at 22 deg C
Tensile strength at break30N/mm^2Typical; ISO 527-3; cured 3 days at 22 deg C
Tensile modulus1,860N/mm^2Typical; ISO 527-3; cured 3 days at 22 deg C
Dielectric breakdown strength33kV/mmTypical; IEC 60243-1; cured 5 days at 22 deg C
Lap shear strength, grit-blasted steel28N/mm^2Typical; 0.13 mm gap; cured 5 days at 22 deg C

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