3M EC-9300
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- Five-Hour Assembly Work Life
- Room-Temperature or Mild-Heat Cure
- Qualified Aircraft Interior FST Data
Product Description
3M Scotch-Weld Epoxy Adhesive EC-9300 B/A FST is a two-part, room-temperature-curing structural epoxy adhesive for aircraft interior assembly. Part B and Part A mix at 100:50 by volume and provide a five-hour work life at 23 +/- 2 deg C for a 45 g mixed quantity. The non-sag adhesive reaches full cure in seven days at 23 deg C or two hours at 65 deg C. Standalone and aluminum-backed specimens were tested for flammability under FAR/JAR/CS 25.853. Separate standalone specimens were evaluated for smoke density under FAR/JAR/CS 25.853 and AITM 2.0007 and for toxic-gas emission under Airbus ABD0031 and AITM 3.0005. The values apply only to those tested configurations.
Key features
- Five-hour assembly window: Provides a defined work life at 23 +/- 2 deg C for the stated 45 g mixed quantity.
- Room-temperature or mild-heat cure: Reaches full cure in seven days at 23 deg C or two hours at 65 deg C.
- Qualified aircraft interior FST scope: Flammability data covers standalone and aluminum-backed specimens; smoke-density and toxic-gas data covers the stated standalone specimens.
Applications
Applications include aircraft interior structural bonding, metal-to-honeycomb and honeycomb-panel bonding, insert bonding, and ditch-and-pot assembly.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Additional Information
As-supplied / before-processing properties
Part B and Part A values are shown in the source order; technical values are typical.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part B color | Brown | As supplied | |
| Part A color | Off-white | As supplied | |
| Part B density | 1.22 | g/cm^3 | Typical |
| Part A density | 1.17 | g/cm^3 | Typical |
| Part B viscosity | 190 | Pa s | Typical |
| Part A viscosity | 15 | Pa s | Typical |
| Mix ratio, Part B:Part A | 100:50 | by volume | Specified product ratio |
| Work life | 5 | hours | 45 g mixed adhesive at 23 +/- 2 deg C |
After-processing / final-state properties
Values are typical for clad aluminum 2024-T3 prepared by optimized FPL. Unless stated otherwise, specimens were cured 2 hours at 65 deg C and used about 1 wt% glass beads, 90 to 150 um diameter, to control bondline thickness.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Overlap shear strength | 24 | MPa | EN 2243-1; -55 deg C test |
| Overlap shear strength | 29 | MPa | EN 2243-1; 23 deg C test |
| Overlap shear strength | 11 | MPa | EN 2243-1; 80 deg C test |
| Overlap shear strength, room-temperature cure | 27 | MPa | EN 2243-1; 7 days at 23 deg C; tested at 23 deg C |
| Floating roller peel strength | 102 | N/25 mm | EN 2243-2; tested at 23 deg C |
| Overlap shear strength after hot-wet aging | 21 | MPa | EN 2243-1; 168 h at 100% RH and 55 deg C; tested at 23 +/- 2 deg C |
