Bomar Oligomer Product
UV/EB Oligomer

BRC-841

BRC-841: Difunctional Aliphatic Hydrophobic Urethane Acrylate

BRC-841 is a low-molecular-weight, difunctional, hydrophobic urethane acrylate that can be effectively formulated for steel and various plastic hard coatings. The resulting hard, tough film makes an effective non-yellowing protective single-coating. The low water absorption and alkaline resistance make BRC-841 ideal for the following industries: aerospace, automotive, appliances, cosmetic, electronic, industrial, medical devices, metal finishing, and UV-curable inks and coatings.

Neat Properties
Property Value
Viscosity cP (60ºC) 13,000
Pt-Co (APHA) Color 20
Refractive Index (25ºC) 1.495
Density, g/cm3 (25ºC) 1.14
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 86D 85D 91D 84D 86D 86D
Elastic Modulus (GPa [ksi]) 1,999.5 [290] 2,482.1 [360] 2,757.9 [400] 1,930.5 [280] 1,654.7 [240] 1,654.7 [240]
Elongation (%) 4.7 3.9 2.2 3 4.4 7.6
MEK Double Rubs (#) 10 6 >200 86 170 63
Tensile Strength (MPa [psi]) 51.7 [7500] 65.5 [9500] 51.7 [7500] 41.4 [6000] 46.2 [6700] 33.1 [4800]
Water Absorption (%) 24hrs 0.37 0.25 0.44 0.6 0.43 1.72
Viscosity (cP) 13,000 @ 25ºC 1,900 @ 25ºC 5,700 @ 25ºC 1,700 @ 25ºC 500 @ 25ºC 4,200 @ 25ºC

Features

  • Improves adhesion
  • Enhances hardness
  • Non yellowing
  • Low water absorption
  • Increases weatherability
  • Provides abrasion resistance
  • Gloss finish
  • Excellent chemical resistance

Applications

  • Coatings and inks for steel
  • Coatings and inks for plastic
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