UV/EB Oligomer
BR-571
BR-571: Difunctional Aliphatic Polyether Urethane Acrylate Oligomer
BR-571 is an aliphatic polyether urethane diacrylate with exceptionally low color. Based on a stable polyether backbone, BR-571 offers excellent physical properties in formulated films. While relatively high in neat viscosity, BR-571 reduces quickly with the addition of heat or monomer. Formulations using BR-571 often have a unique blend of toughness and flexibility.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 31,000 |
| Pt-Co (APHA) Color | 20 |
| Refractive Index (25ºC) | 1.494 |
| Density, g/cm3 (25ºC) | 1.08 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 23.4 [3400] | 19.3 [2800] | 31.7 [4600] | 16.5 [2400] | 19.3 [2800] | 15.9 [2300] |
| Elongation (%) | 75 | 40 | 3.1 | 10.6 | 5.5 | 80 |
| Elastic Modulus (MPa [ksi]) | 310.3 [45] | 965.3 [140] | 1,172.1 [170] | 482.6 [70] | 620.5 [90] | 137.9 [20] |
| Durometer Hardness | 64D | 75D | 80D | 68D | 71D | 60D |
| Water Absorption (%) 24hrs | 0.5 | 0.35 | 0.7 | 0.8 | 0.66 | 2.74 |
| MEK Double Rubs (#) | 75 | 25 | >200 | 92 | 130 | 23 |
| Viscosity (cP) | 34,000 @ 25ºC | 3,000 @ 25ºC | 15,000 @ 25ºC | 2,800 @ 25ºC | 1,000 @ 25ºC | 9,800 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure