Product Information
| Molecular Structure |  |
| Chemical Name | Propyl Ethyl Pentane Diamine |
| CAS Number | 75405-14-0 |
| Chemical Formula | C10H24N2 |
| Molecular Weight | 172.32 g/mol |
Chemical & Physical Properties
| Property Name | Value |
|---|---|
| Viscosity | TBD |
| Amine Value | 651 |
| Hydrogen Equivalent Weight | 43.1 |
| Recycled Content | 94% |
Synthesis of 3-ethyl-2-propyl-1,5-pentanediamine (PEPDA)
Summary
Propylethylpentamethylene diamine (PEPDA) is a developmental stage diamine designed for use in epoxy and isocyanate systems as well as a monomer in high performance polyamides. As an epoxy curative, PEPDA provides a long pot life and gel time, good chemical resistance, and high shore D hardness. PEPDA has no odor and is a colorless low viscosity liquid with 97% recycled content. Performance of formulated epoxy systems suggests PEPDA may be used as an alternative to trimethyl hexamethylene diamine (TMD).
Comparison to TMD in a Standard Epoxy Blend
| Trimethyl hexamethylene diamine | Dytek® PEPDA | |
|---|---|---|
 | | |
| Epoxy blend viscosity, cP | 778 | 697 |
| Gel time, min | 60 | 82 |
| Pot life, 100 g sample | 42 | 64 |
| Temperature, (max,°C) | 184 | 183 |
| Shore D | 84 | 84 |
| Heat Deflection Temperature, °C | 98 | 100 |
| Flexural Strength, (psi x 103) | 14.8 | 16.3 |
| Elasticity Modulus, (psi x 103) | 382 | 382 |
| Tensile Strength, (psi x 103) | 9.72 | 8.37 |
| Elongation at Break, % | 4.18 | 3.26 |
| Dielectric constant, 1 MHz, 25°C | 3.94 | 3.68 |
| Chemical Resistance | (wt% change) | (wt% change) |
| Deionized water | 0.78 | 0.62 |
| 10 wt% acetic acid (aq) | 4.98 | 2.05 |
| 10 wt% HCl (aq) | 0.65 | 0.89 |
| 10 wt% NaOH (aq) | 0.60 | 0.65 |
| Xylene | -0.02 | 0.12 |
| Gasoline | 0.27 | 0.17 |