Bomar Oligomer Product
UV/EB Oligomer

BRC-843

BRC-843: Difunctional Aliphatic Hydrophobic Urethane Acrylate

BRC-843 is a difunctional, hydrophobic urethane acrylate which can be formulated to be used in heavy-duty industrial and commercial applications. The resulting tough film makes an effective, non-yellowing, protective single-coating that extends the substrates use-life. The low water absorption and alkaline resistance make this oligomer perfect for the following industries: aerospace, appliance, automotive, cosmetic, electronic, industrial, medical device, metal finishing, and UV-curable inks & coatings. BRC-843 exhibits retention of mechanical properties after exposure to high temperatures (200°C for 30 minutes). In addition to the adhesion properties listed in the table below, BRC-843 also shows excellent adhesion to ABS, PVC, PMMA, and Polystyrene.

Neat Properties
Property Value
Viscosity cP (25ºC) 90,000
Pt-Co (APHA) Color 30
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.09
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 52D 70D 70D 72D 31D
Elastic Modulus (GPa [ksi]) 5.5 [0.8] 55.2 [8] 137.9 [20] 206.8 [30] 6.9 [1]
Elongation (%) 180 70 13.0 5.0 160
MEK Double Rubs (#) 22 19 35 >200 62
Tensile Strength (MPa [psi]) 9.7 [1400] 9.0 [1300] 8.3 [1200] 8.3 [1200] 6.9 [1000]
Water Absorption (%) 24hrs 0.4 0.3 0.6 0.5 2.5
Viscosity (cP) 5,700 @ 25ºC 900 @ 25ºC — @ 25ºC 1,000 @ 25ºC 500 @ 25ºC 2,300 @ 25ºC

Features

  • Improves adhesion
  • Enhances hardness
  • Non yellowing
  • High temperature resistance
  • Increases weatherability
  • Provides abrasion resistance
  • Provides alkali resistance
  • Low water absorption

Applications

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