LORD 7556
Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide
Main features
- Clear Plastic Bonding
- Fast A/C Working Window
- Non-Sag Cartridge Application
Product Description
LORD 7556-A/C Urethane Adhesive is a clear, equal-mix two-component system for bonding Lexan, ABS, polycarbonate and other supported plastics, as well as primed metals. The system combines LORD 7556-A resin with LORD 7556-C curative in 200 mL or 400 mL cartridges. The A/C system provides 4 to 6 minutes of working time at 90 deg F (32 deg C), reaches handling strength in 90 to 140 minutes at 73 deg F (23 deg C), and develops full strength after 24 hours at 77 deg F (25 deg C). Its non-sag application supports vertical and overhead placement.
Key features
- Clear plastic-bonding system: Bonds supported plastics including Lexan, ABS and polycarbonate, plus properly prepared metals.
- Fast A/C processing window: Provides 4 to 6 minutes of working time and 90 to 140 minutes to handling strength at the stated temperatures.
- Non-sag cartridge application: Equal-volume cartridges dispense the A/C system for placement on vertical or overhead surfaces.
Applications
Applications include sign assembly and bonding supported plastics, polycarbonate, prefinished or primed metals, and other supported substrates.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
As-supplied / before-processing properties
Typical component and mixed-system values apply specifically to the LORD 7556-A/C configuration.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Component appearance | Translucent paste; translucent paste | - | Typical; LORD 7556-A resin; LORD 7556-C curative |
| Component viscosity | 40,000 to 160,000; 80,000 to 300,000 | cP | Typical at 77 deg F (25 deg C); LORD 7556-A resin; LORD 7556-C curative |
| Component density | 9.64 to 10.04; 9.2 to 9.6 | lb/gal | Typical; LORD 7556-A resin; LORD 7556-C curative |
| Mix ratio | 1:1 | parts by volume | LORD 7556-A resin to LORD 7556-C curative |
| Working time | 4 to 6 | minutes | Typical; LORD 7556-A/C at 90 deg F (32 deg C) |
| Time to handling strength | 90 to 140 | minutes | Typical; LORD 7556-A/C at 73 deg F (23 deg C) |
| Shelf life | 6 | months | Original unopened container at 70 to 80 deg F (21 to 27 deg C) |
After-processing / final-state properties
Qualitative resistance properties apply to the cured LORD 7556-A/C adhesive system.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Weathering, humidity and salt-spray resistance | Resistant | - | Cured LORD 7556-A/C system; qualitative characteristic |
| UV resistance | Resistant | - | Cured LORD 7556-A/C system; qualitative characteristic |
| Solvent resistance | Resistant | - | Cured LORD 7556-A/C system; painting and most cleaning processes do not affect bond strength |
