UV/EB Oligomer
BR-3741AJ
BR-3741AJ: 1.3 Functional Aliphatic Polyether Urethane Acrylate Oligomer
BR-3741AJ is an aliphatic 1.3 acrylate functional polyether urethane. The extremely elongative nature of BR-3741AJ makes it an excellent candidate for consideration in UV light curable PSAs as a reactive tackifier. It is also used as a co-oligomer for adhesion promotion in coatings. Films formulated with BR-3741AJ are highly flexible, elastomeric, and tacky. This oligomer is an excellent adhesion promoter, and compared to other reactive tackifiers it results in relatively tougher films. It is a perfect choice for optically clear UV pressure-sensitive adhesives (PSAs).
| Neat Properties | |
|---|---|
| Property | Value |
| Viscosity cP (60ºC) | 23,000 |
| Pt-Co (APHA) Color | 15 |
| Refractive Index (25ºC) | 1.46 |
| Density, g/cm3 (25ºC) | 1.01 |
| Monomer Dilution Properties | ||||||
|---|---|---|---|---|---|---|
| Value | ||||||
| Property | I30 | I50 | TM50 | TP50 | H50 | HE30 |
| Tensile Strength (MPa [psi]) | 0.4 [55] | 4.8 [700] | 9.0 [1300] | 4.8 [700] | 6.9 [1000] | ‖ |
| Elongation (%) | 300 | 900 | 4.2 | 20 | 13 | ‖ |
| Elastic Modulus (MPa [ksi]) | 0.3 [0.05] | 42.1 [6.1] | 275.8 [40] | 68.9 [10] | 103.4 [15] | ‖ |
| Durometer Hardness | 20A | 26D | 63D | 38D | 41D | ‖ |
| Water Absorption (%) 24hrs | 1.18 | 0.77 | 1.57 | 1.38 | 1.19 | ‖ |
| MEK Double Rubs (#) | 100 | 54 | >200 | 32 | 8 | ‖ |
| Viscosity (cP) | 20,000 @ 25ºC | 3,500 @ 25ºC | 16,000 @ 25ºC | 4,200 @ 25ºC | 2,300 @ 25ºC | 14,000 @ 25ºC |
** Tensile Properties per ASTM D882 - Not Tested || Incompatible X Unable to Measure