Bomar Oligomer Product
UV/EB Oligomer

BR-204

BR-204: Difunctional Aromatic Polyether Urethane Methacrylate Oligomer

BR-204, an aromatic polyether urethane dimethacrylate, finds use in a diverse number of UV adhesives applications. BR-204 is valued for its strong bond strength, its affinity for glass, steel, and a variety of plastic substrates, and for its excellent elongation. BR-204 is also of value for its low initial viscosity and low color (despite its aromatic nature).

Neat Properties
Property Value
Viscosity cP (25ºC) 11,000
Pt-Co (APHA) Color 15
Refractive Index (25ºC) 1.502
Density, g/cm3 (25ºC) 1.03
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 39A 51A 75D 45D 55D 30A
Elastic Modulus (GPa [ksi]) 0.9 [0.13] 1.5 [0.22] 448.2 [65] 137.9 [20] 206.8 [30] 2.2 [0.32]
Elongation (%) 120 190 3.0 15.0 7.9 200
MEK Double Rubs (#) 3 6 128 8 17 32
Tensile Strength (MPa [psi]) 0.6 [90] 1.0 [150] 11.7 [1700] 6.9 [1000] 9.7 [1400] 0.8 [120]
Water Absorption (%) 24hrs 1.56 1.03 1.64 1.46 0.89 6.78
Viscosity (cP) 2,100 @ 25ºC 600 @ 25ºC 2,300 @ 25ºC 700 @ 25ºC 400 @ 25ºC 1,600 @ 25ºC

Features

  • High bond strength
  • Low neat viscosity
  • Low color
  • High elongation
  • Exhibits hydrolytic stability

Applications

  • Primer coatings
  • Glass coatings
  • Adhesives
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