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
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.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Resin, hardener, and mixed values are shown separately.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio, resin : hardener | 2 : 1 | By volume | |
| Mix ratio, resin : hardener | 100 : 43 | By weight | |
| Resin viscosity | 107,000 | mPa s | Typical; cone and plate; 25 deg C; CP50-1; 100 s^-1 |
| Hardener viscosity | 6,200 | mPa s | Typical; cone and plate; 25 deg C; CP50-1; 100 s^-1 |
| Mixed viscosity | 16,000 | mPa s | Typical; cone and plate; 25 deg C; CP50-1; 100 s^-1 |
| Fixture time, grit-blasted steel | 165 to 180 | min | Typical; 22 deg C; 0.1 N/mm^2 threshold; ISO 4587 |
Cured / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Glass transition temperature, Tg | 57 | deg C | Typical; ISO 11359-2; cured 5 days at 22 deg C |
| Shore hardness | 79 | Shore D | Typical; ISO 868; cured 5 days at 22 deg C |
| Tensile strength at break | 30 | N/mm^2 | Typical; ISO 527-3; cured 3 days at 22 deg C |
| Tensile modulus | 1,860 | N/mm^2 | Typical; ISO 527-3; cured 3 days at 22 deg C |
| Dielectric breakdown strength | 33 | kV/mm | Typical; IEC 60243-1; cured 5 days at 22 deg C |
| Lap shear strength, grit-blasted steel | 28 | N/mm^2 | Typical; 0.13 mm gap; cured 5 days at 22 deg C |
