UV/EB Oligomer
BR-641D
BR-641D: Difunctional Aliphatic Polybutadiene Urethane Acrylate Oligomer
BR-641D is a Polybutadiene (PBD) urethane acrylate, which was designed to meet rigorous electronic coating applications. This oligomer has exceptional adhesion to various metals,
glass, and polycarbonate substrates. BR-641D has many desirable properties that are typical to PBD resins, combined with radiation curability. In applications requiring thermal cycling resistance, BR-641D withstands the extremes of temperature typical of such tests, without undue degradation of properties. In addition to the adhesion properties listed in the table below, BR-641D showed excellent adhesion to PMMA, ABS, PVC, Nylon-6, Polystyrene, and Polypropylene.
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 15,000 |
| Pt-Co (APHA) Color | 26 |
| Refractive Index (25ºC) | 1.48 |
| Density, g/cm3 (25ºC) | 0.93 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 4.8 [700] | 7.6 [1100] | ‖ | ‖ | ‖ | ‖ |
| Elongation (%) | 300 | 400 | ‖ | ‖ | ‖ | ‖ |
| Elastic Modulus (MPa [ksi]) | 1.4 [0.2] | 2.1 [0.3] | ‖ | ‖ | ‖ | ‖ |
| Durometer Hardness | 85A | 54D | ‖ | ‖ | ‖ | ‖ |
| Water Absorption (%) 24hrs | 0.06 | 0.06 | ‖ | ‖ | ‖ | ‖ |
| MEK Double Rubs (#) | 60 | 40 | ‖ | ‖ | ‖ | ‖ |
| Viscosity (cP) | 12,000 @ 25ºC | 1,600 @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC | ‖ @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure