Indestructible Paint EPWA27 Abradable Attrition Coatings
- Chemical Family
- Epoxy & Epoxy Derivatives
EPWA27 Abradable Attrition Coatings is also known as PX/HX 443D. It is a graphite-filled two-part attrition compound that has almost totally replaced an earlier multi-coat spray system. An alternative version is EPWA27 is available that was designed to provide a 1:1 mix ratio. This product is not formally adopted but it represents an identical composition to EPWA27 when the two parts are mixed.
Other characteristics
- Features
Abrasion Resistant, Oil Resistant, Solvent Resistant
- Product Type
- 2K (2 component) Coating, Epoxy Coating
- 2K (2 component) Coating
- Epoxy Coating
- Usage
Uses included the engine rings of the AB-8B Harrier.. Used in fan track linings where grooves are machined into the material; this is common in the compressor case area as 'knife seals' as it is denser then materials used in other areas.
- Markets
- Automotive & Transportation
- Storage
Use suitable chemical storage for semi-solid materials.; Shelf Life - 12 months temperate; 6 months tropical
- Pack Size
- 1kg kit
- 7.5kg kit
- Components
- EPWA27-A and EPWA27-B
- May be thinned with MEK (methyl ethyl ketone).
- Processing
Processing of EPWA27 for Rolls Royce machinery is given in RPS 340/1. This data is evolved from the original use of the material on the Pegasus engine. The material will fully cure at room temperature; 90 - 95 % cure is achieved after 24 hours at typical working temperatures; the final 5 - 10 %of the cure will take place over the next few days. Provided that ambient temperatures are not too low, EPWA27 will be sufficiently cured after 24 hours to be fully resistant to solvents and cutting oils. EPWA27 is designed not to slump and thus allows faster application into thicker, deeper grooves.
- Performance
- Oil, Grease, Resistant attrition coating.
- Cured coating – Shore D hardness – 70 - 85 units
- Technology
- Ready-to-Use Products
- Cleanup Solvents
- 40006 Gun Cleaner
Technical data
Table 1 of 1
7 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Hardness | 72 - 75 | Shore D | ASTM D2240 |
| Supply Viscosity | Ready for Use | — | — |
| Flash Point | min. 200oC | °C | — |
| VOC Content (As Supplied Mix) | 0.0 | g/l | — |
| Density (Mixed) | 1.08 | g/ml | — |
| Catalyst | 2 Part Kit | — | — |
| Theoretical Coverage (100 Micron) | 9.2 | sq.m/kg | — |
