UV/EB Oligomer
BR-742M
BR-742M: Difunctional Aliphatic Polyester Urethane Methacrylate Oligomer
BR-742M is a medium molecular weight, difunctional, aliphatic polyester urethane methacrylate offering excellent adhesion, flexibility, and hardness balance. BR-742M offers an excellent balance of gloss, low heat generation, low color, and low MeHQ for nail coating applications. It can also be effectively formulated for adhesion to steel, aluminum, and glass. Due to its low solvent resistance, it can be formulated into solvent strippable temporary coatings. This material has low skin sensitivity for dental and cosmetic applications.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 28,000 |
| Pt-Co (APHA) Color | 15 |
| Refractive Index (25ºC) | 1.484 |
| Density, g/cm3 (25ºC) | 1.11 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 20.0 [2900] | 24.8 [3600] | 33.1 [4800] | 25.5 [3700] | 30.3 [4400] | 14.5 [2100] |
| Elongation (%) | 70 | 7.6 | 2.3 | 13.1 | 5.7 | 70 |
| Elastic Modulus (MPa [ksi]) | 620.5 [90] | 1,379.0 [200] | 1,654.7 [240] | 965.3 [140] | 1,034.2 [150] | 448.2 [65] |
| Durometer Hardness | 79D | 80D | 88D | 78D | 81D | 79D |
| Water Absorption (%) 24hrs | 0.27 | 0.20 | 0.40 | 0.45 | 0.35 | 1.33 |
| MEK Double Rubs (#) | 66 | 12 | >200 | 42 | 160 | 65 |
| Viscosity (cP) | 17,000 @ 25ºC | 1,200 @ 25ºC | 8,600 @ 25ºC | 1,200 @ 25ºC | 400 @ 25ºC | 3,200 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure