Bomar Oligomer Product
UV/EB Oligomer

BR-302

BR-302: Difunctional Aromatic Polyether Urethane Acrylate Oligomer

BR-302 is a linear aromatic urethane diacrylate, typically used in coatings and adhesives applications where yellowing constraints are not present. The backbone and aromatic content of BR-302 offer excellent chemical resistance and toughness, combined in an affordable oligomer.

Neat Properties
Property Value
Viscosity cP (60ºC) 5,600
Pt-Co (APHA) Color 50
Refractive Index (25ºC) 1.496
Density, g/cm3 (25ºC) 1.10
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 41D 70D 85D 67D 73D
Elastic Modulus (GPa [ksi]) 38.6 [5.6] 386.1 [56] 896.3 [130] 310.3 [45] 551.6 [80]
Elongation (%) 100 110 6 10.5 9.5
MEK Double Rubs (#) 10 6 >200 54 >200
Tensile Strength (MPa [psi]) 8.3 [1200] 15.9 [2300] 30.3 [4400] 9.7 [1400] 19.3 [2800]
Water Absorption (%) 24hrs
Viscosity (cP) 6,000 @ 25ºC 700 @ 25ºC 3,800 @ 25ºC 800 @ 25ºC 300 @ 25ºC — @ 25ºC

Features

  • Excellent chemical resistance
  • Imparts toughness
  • Low cost
  • Gloss finish
  • Exhibits hydrolytic stability
  • Improves adhesion

Applications

  • Interior coatings
  • Floor coatings
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