UV/EB Oligomer
BR-940BT
BR-940BT: Difunctional Aliphatic Urethane Acrylate
BR-940BT is a tin-free low molecular weight, difunctional, aliphatic urethane acrylate offering excellent adhesion, flexibility, and balanced hardness. BR-940BT has an excellent balance of gloss, low color, and hardness for coatings and offers a low formulation viscosity. It can also be effectively formulated for adhesion to steel, aluminum, and glass. It has a moderate hydrophobic character lending it to moisture resistance and high crosslink density performance. This material is excellent for building toughness into 3D printed matrices.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (25ºC) | 7,200 |
| Pt-Co (APHA) Color | 30 |
| Refractive Index (25ºC) | 1.4861 |
| Density, g/cm3 (25ºC) | 1.12 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 29.6 [4300] | 37.9 [5500] | 51.7 [7500] | 63.4 [9200] | 46.9 [6800] | 24.1 [3500] |
| Elongation (%) | 45 | 6.2 | 3.3 | 17.5 | 6.8 | 65 |
| Elastic Modulus (GPa [ksi]) | 1,447.9 [210] | 2,344.2 [340] | 1,585.8 [230] | 2,757.9 [400] | 1,654.7 [240] | 413.7 [60] |
| Durometer Hardness | 80D | 84D | 90D | 80D | 82D | 31D |
| Water Absorption (%) 24hrs | 3.0 | 0.2 | 0.33 | 0.48 | 0.32 | 1.95 |
| MEK Double Rubs (#) | 14 | 13 | >200 | 96 | >200 | 18 |
| Viscosity (cP) | 730 @ 25ºC | 180 @ 25ºC | 600 @ 25ºC | 185 @ 25ºC | 90 @ 25ºC | 350 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure