UV/EB Oligomer
BR-371B
BR-371B: Difunctional Aliphatic Polyether Urethane Acrylate Oligomer
BR-371B, a low molecular weight, difunctional, aliphatic polyether urethane acrylate oligomer, is a great fit for coatings that require high tensile strength, superior hardness, scratch resistance, and weathering resistance. Formulations with BR-371B yield hard, clear, low-yellowing films. This is a reduced MEHQ version of BR-371S.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 67,000 |
| Pt-Co (APHA) Color | <100 |
| Refractive Index (25ºC) | 1.497 |
| Density, g/cm3 (25ºC) | 1.10 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 41.4 [6000] | 37.9 [5500] | 38.6 [5600] | 31.0 [4500] | 31.7 [4600] | 37.9 [5500] |
| Elongation (%) | 4.3 | 4.1 | 2.6 | 4.2 | 3.7 | 4.1 |
| Elastic Modulus (MPa [ksi]) | 1,723.7 [250] | 1,585.8 [230] | 1,999.5 [290] | 1,447.9 [210] | 1,310.0 [190] | 1,723.7 [250] |
| Durometer Hardness | 86D | 87D | 92D | 85D | 84D | 88D |
| Water Absorption (%) 24hrs | 0.21 | 0.15 | 0.25 | 0.31 | 0.24 | 0.76 |
| MEK Double Rubs (#) | >200 | 100 | >200 | >200 | >200 | >200 |
| Viscosity (cP) | 42,000 @ 25ºC | 1,900 @ 25ºC | 12,000 @ 25ºC | 1,900 @ 25ºC | 500 @ 25ºC | 5,500 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure