LORD 320/323
Harmonization Code : 38159000 | Unspecified reaction initiators, accelerators, and catalytic preparations
Main features
- 20-40 Minute Working Window
- 45-60 Minute Cure at 82 deg C
- UV-Fluorescent Mix Inspection
Product Description
LORD 320/323 is a two-part epoxy adhesive system for primerless bonding to automotive SMC and adhesion to prepared metals, rubber, FRP, polyester thermosets and thermoplastics. It can cure at room temperature or with heat, with a typical working time of 20-40 minutes at 24 deg C and handling strength in 2-4 hours. A general-purpose mixed-stress configuration uses a 1:1 volume ratio, while other joint designs use different ratios. At 82 deg C, full cure strength is reached in 45-60 minutes. LORD 323 hardener fluoresces bright blue under UV light for inspection.
Key features
- Mixed-System Work Time: Typical working time is 20 to 40 minutes at 24 deg C for a 54 g mixed mass.
- Heat-Cure Schedule: Full cure strength can be obtained in 45 to 60 minutes at 82 deg C.
- UV Inspection: LORD 323 hardener fluoresces bright blue under UV light to aid material inspection.
Applications
Automotive SMC, prepared metals, rubber, FRP, polyester thermosets and thermoplastics.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
Component values are shown separately for LORD 320 resin and LORD 323 hardener.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| LORD 320 resin viscosity | 300,000-1,000,000 | cP | Typical; Brookfield HBF, Helipath, 5 rpm, T-Bar D; 25 deg C |
| LORD 323 hardener viscosity | 500,000-1,350,000 | cP | Typical; Brookfield HBF, Helipath, 5 rpm, T-Bar E; 25 deg C |
| LORD 320 resin density | 1,498-1,546 | kg/m3 | Typical |
| LORD 323 hardener density | 1,234-1,264 | kg/m3 | Typical |
| Flash point, closed cup | Greater than 93 | deg C | Typical; both components |
| Shelf life | 2 | years | Original unopened container at 16-27 deg C |
Cured / final-state properties
Typical cured properties apply to the mixed LORD 320/323 adhesive system.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength at break | 4,440 | psi | Typical; ASTM D882-83A, modified |
| Elongation | 3 | % | Typical; ASTM D882-83A, modified |
| Young's modulus | 230,000 | psi | Typical; ASTM D882-83A, modified |
| Glass transition temperature | 80 | deg C | Typical; ASTM E1640-99, DMA |
