UV/EB Oligomer
BR-771F
BR-771F: Difunctional Aliphatic Polyester Urethane Acrylate
BR-771F is a low molecular weight oligomer with a good balance of high tensile strength and moderate elongation with an excellent cure speed. BR-771F exhibits excellent adhesion to plastic substrates, particularly polycarbonate. Formulations made with BR-771F can exhibit superior toughness properties with a high Tg. Its inherently low color and aliphatic backbone make BR-771F an excellent candidate for polycarbonate coatings and adhesives.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 42,000 |
| Pt-Co (APHA) Color | 20 |
| Refractive Index (25ºC) | 1.50 |
| Density, g/cm3 (25ºC) | 1.18 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 26.2 [3800] | 29.0 [4200] | 42.1 [6100] | 26.2 [3800] | 37.9 [5500] | 17.9 [2600] |
| Elongation (%) | 10 | 15 | 3.2 | 13 | 7.5 | 70 |
| Elastic Modulus (MPa [ksi]) | 965.3 [140] | 1,241.1 [180] | 1,654.7 [240] | 965.3 [140] | 1,103.2 [160] | 344.7 [50] |
| Durometer Hardness | 82D | 83D | 90D | 82D | 82D | 82D |
| Water Absorption (%) 24hrs | 0.32 | 0.22 | 0.38 | 0.49 | 0.37 | 1.61 |
| MEK Double Rubs (#) | >200 | 36 | >200 | >200 | >200 | 56 |
| Viscosity (cP) | 43,000 @ 25ºC | 3,000 @ 25ºC | 14,000 @ 25ºC | 2,200 @ 25ºC | 700 @ 25ºC | 6,000 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure