UV/EB Oligomer
BR-641E
BR-641E: Difunctional Aliphatic Polybutadiene Urethane Acrylate Oligomer
BR-641E is a polybutadiene urethane acrylate oligomer designed for rigorous electronic coating, flexible ink, and pressure-sensitive adhesive applications. This oligomer is also perfect for extremely low water absorption applications. It is resistant to thermal cycling and can withstand the temperature extremes typical of such tests without undue degradation of properties.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 25,000 |
| Pt-Co (APHA) Color | 20 |
| Refractive Index (25ºC) | 1.477 |
| Density, g/cm3 (25ºC) | 0.88 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Durometer Hardness | 42A | 60A | ‖ | ‖ | ‖ | ‖ |
| Elastic Modulus (GPa [ksi]) | 0.5 [0.07] | 1.5 [0.22] | ‖ | ‖ | ‖ | ‖ |
| Elongation (%) | 85 | 400 | ‖ | ‖ | ‖ | ‖ |
| MEK Double Rubs (#) | 32 | 12 | ‖ | ‖ | ‖ | ‖ |
| Tensile Strength (MPa [psi]) | 0.3 [50] | 2.4 [350] | ‖ | ‖ | ‖ | ‖ |
| Water Absorption (%) 24hrs | 0.02 | 0.03 | ‖ | ‖ | ‖ | ‖ |
| Viscosity (cP) | 16,000 @ 25ºC | 2,600 @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC |