UV/EB Oligomer
BR-990
BR-990: Trifunctional Aliphatic Urethane Acrylate Oligomer
BR-990, an aliphatic polyether urethane triacrylate, is a more flexible option from the BR-900 series of high-purity oligomers. BR-990 can be used effectively in performance coatings applications needing a greater degree of flexibility than is offered by higher functionality materials of the same product line. In addition, BR-990 offers one of the lowest viscosity profiles of any urethane acrylate.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (25ºC) | 34,000 |
| Pt-Co (APHA) Color | 50 |
| Refractive Index (25ºC) | 1.49 |
| Density, g/cm3 (25ºC) | 1.15 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 14.5 [2100] | 28.3 [4100] | 34.5 [5000] | 10.3 [1500] | 15.9 [2300] | 4.8 [700] |
| Elongation (%) | 40 | 65 | 3.5 | 12 | 10 | 35 |
| Elastic Modulus (MPa [ksi]) | 65.5 [9.5] | 965.3 [140] | 1,516.8 [220] | 241.3 [35] | 482.6 [70] | 172.4 [25] |
| Durometer Hardness | 61D | 80D | 86D | 74D | 77D | 44A |
| Water Absorption (%) 24hrs | 0.38 | 0.28 | 0.45 | 0.53 | 0.4 | 2.14 |
| MEK Double Rubs (#) | 30 | 20 | >200 | 64 | >200 | 25 |
| Viscosity (cP) | 2,100 @ 25ºC | 420 @ 25ºC | 2,000 @ 25ºC | 480 @ 25ºC | 220 @ 25ºC | 940 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure