LORD 7555
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Fast A/C Handling Strength
- Extended 45-Minute A/E Work Time
- Non-Sag Bead Placement
Product Description
LORD 7555 Urethane Adhesive / Sealant is a bright-white, equal-mix two-component urethane system for bonding and sealing plastics and prepared metals. Its non-sag formulation holds a bead pattern and can be applied with handheld cartridges. The LORD 7555-A/C configuration provides a typical 3 to 5 minute working time and reaches handling strength in 1 hour at 77 deg F (25 deg C). The LORD 7555-A/E configuration extends working time to 45 minutes and reaches handling strength in 5 to 6 hours. Both configurations mix 1:1 by volume and can be painted immediately after application. The cured material is UV resistant and has a typical elongation of 166%.
Key features
- Configuration-specific work times: Choose 3 to 5 minutes for LORD 7555-A/C or 45 minutes for LORD 7555-A/E at 77 deg F (25 deg C).
- Non-sag bead control: The full-bodied formulation holds its bead pattern and resists slumping during application.
- Immediate paintability: The applied adhesive/sealant can be painted immediately to support faster downstream processing.
Applications
Applications include bonding and sealing plastics and prepared metals, with A/C suited to smaller assemblies and A/E providing more placement time for larger projects.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
As-supplied / before-processing properties
Typical values are configuration-specific for LORD 7555-A/C and LORD 7555-A/E as identified.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Component appearance | Translucent paste; white paste; white paste | - | Typical; LORD 7555-A resin; 7555-C curative; 7555-E curative |
| 7555-A viscosity | 40,000 to 160,000 | cP | Typical; resin at 77 deg F (25 deg C) |
| 7555-C viscosity | 130,000 to 230,000 | cP | Typical; curative at 77 deg F (25 deg C) |
| 7555-E viscosity | 130,000 to 230,000 | cP | Typical; curative at 77 deg F (25 deg C) |
| Mix ratio | 1:1 | parts by volume | Typical; LORD 7555-A/C and LORD 7555-A/E; resin to curative |
| Working time | 3 to 5; 45 | minutes | Typical at 77 deg F (25 deg C); LORD 7555-A/C; LORD 7555-A/E |
| Time to handling strength | 1; 5 to 6 | hours | Typical at 77 deg F (25 deg C); LORD 7555-A/C; LORD 7555-A/E |
| Shelf life | 6 | months | Each component; original unopened container at 50 to 80 deg F (10 to 27 deg C) |
After-processing / final-state properties
Properties apply to cured LORD 7555-A/C and LORD 7555-A/E systems as identified.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Elongation | 166 | % | Typical; cured LORD 7555-A/C and LORD 7555-A/E |
| Weathering, humidity and salt-spray resistance | Resistant | - | Cured system; qualitative characteristic |
| UV resistance | Resistant | - | Bright-white cured material; qualitative characteristic |
| Solvent resistance | Resistant | - | Cured system; painting and most cleaning processes do not affect bond strength |
