Bomar Oligomer Product
UV/EB Oligomer

BRC-843S

BRC-843S: Difunctional Aliphatic Hydrophobic Urethane Acrylate

BRC-843S 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 a functional, non-yellowing, protective single-coating that extends the substrates use-life. BRC-843S is a softer and more flexible version of BRC-843. This oligomer is also tougher then BRC-843. The low water absorption and alkaline resistance make this oligomer perfect for specialty applications in the following industries: aerospace, appliance, automotive, electronic, and medical device.

Neat Properties
Property Value
Viscosity cP (60ºC) 41,000
Pt-Co (APHA) Color <100
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.10
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 36D 60D 80D 61D 66D 75D
Elastic Modulus (GPa [ksi]) 5.5 [0.8] 10.3 [1.5] 655.0 [95] 103.4 [15] 275.8 [40] 4.1 [0.6]
Elongation (%) 300 400 5.9 30 15 240
MEK Double Rubs (#) 21 25 >200 69 195 18
Tensile Strength (MPa [psi]) 14.5 [2100] 32.4 [4700] 27.6 [4000] 19.3 [2800] 22.8 [3300] 7.6 [1100]
Water Absorption (%) 24hrs 0.4 0.28 0.56 0.61 0.51 3.73
Viscosity (cP) 24,000 @ 25ºC 3,000 @ 25ºC 13,000 @ 25ºC 3,200 @ 25ºC 1,500 @ 25ºC 9,900 @ 25ºC

Features

  • Improves adhesion
  • Enhances hardness
  • Non-yellowing and high gloss
  • Low water absorption
  • High temperature resistance
  • Increases weatherability
  • Provides alkali resistance

Applications

  • Coatings and inks for steel, plastic, and glass
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