Bomar Oligomer Product
UV/EB Oligomer

BR-441BI20

BR-441BI20: Difunctional Aliphatic Polyester Urethane Acrylate Oligomer

BR-441BI20 is a fast-curing, high tensile strength, low molecular weight aliphatic polyester urethane acrylate with low color, high hardness, and excellent adhesion to plastic substrates. BR-441BI20 can be considered for use in high tensile strength overprint varnishes, high tensile strength 3D printing resins, and low-yellowing coatings.

Neat Properties
Property Value
Viscosity cP (25ºC) 73,000
Pt-Co (APHA) Color 30
Refractive Index (25ºC) 1.49
Density, g/cm3 (25ºC) 1.13
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 87D 85D 91D 82D 85D 81D
Elastic Modulus (GPa [ksi]) 1,654.7 [240] 1,447.9 [210] 1,654.7 [240] 1,310.0 [190] 1,172.1 [170] 1,310.0 [190]
Elongation (%) 4.7 3.5 1.9 3.8 4.1 7.2
MEK Double Rubs (#) 37 7 >200 195 >200 7
Tensile Strength (MPa [psi]) 40.0 [5800] 35.9 [5200] 27.6 [4000] 28.3 [4100] 33.8 [4900] 24.8 [3600]
Water Absorption (%) 24hrs 0.27 0.2 0.3 0.36 0.24 1.68
Viscosity (cP) 2,500 @ 25ºC 400 @ 25ºC 2,000 @ 25ºC 300 @ 25ºC 140 @ 25ºC 600 @ 25ºC

Features

  • Fast curing
  • Glossy finish
  • Low-yellowing
  • Oil and chemical resistance
  • Adhesion to plastics
  • High tensile strength

Applications

  • Plastic coatings
  • Hard 3D printing resins
  • Overprint varnishes
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