Bomar Oligomer Product
UV/EB Oligomer

BR-372

BR-372: Difunctional Aliphatic Polyether Urethane Acrylate Oligomer

BR-372, a medium molecular weight, difunctional, aliphatic polyether urethane acrylate oligomer, is a material offering a balance of toughness and flexibility, with very low color. Formulations with BR-372 yield high clarity films with adhesion to a variety of plastics, and can also be used in the manufacture of UV-curable fiberglass matrix resins. This material has low skin sensitivity for dental and cosmetic applications.

Neat Properties
Property Value
Viscosity cP (60ºC) 8,500
Pt-Co (APHA) Color <50
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.10
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 65D 75D 85D 69D 76D
Elastic Modulus (GPa [ksi]) 172.4 [25] 551.6 [80] 827.4 [120] 413.7 [60] 551.6 [80]
Elongation (%) 90 85 5 13 9
MEK Double Rubs (#) 7 8 >200 76 >200
Tensile Strength (MPa [psi]) 15.2 [2200] 17.9 [2600] 27.6 [4000] 12.4 [1800] 18.6 [2700]
Water Absorption (%) 24hrs
Viscosity (cP) 9,500 @ 25ºC 1,000 @ 25ºC 5,400 @ 25ºC 1,100 @ 25ºC 400 @ 25ºC — @ 25ºC

Features

  • Enhances flexibility
  • Low Color
  • Increases hardness
  • Improves adhesion
  • Low skin sensitivity

Applications

  • Plastic coatings
  • Wood coatings
  • Fiberglass composites
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