Bomar Oligomer Product
UV/EB Oligomer

BR-345

BR-345: Difunctional Aliphatic Polyether Urethane Acrylate Oligomer

BR-345 is a difunctional polyether urethane acrylate that provides unique properties for 3D printing resins. This soft material is ideal for use in applications where high elongation is desired, and can be used as an additive for impact resistance. Resins with less than 1000 cps can be formulated with this material when monomer levels are above 50%

Neat Properties
Property Value
Viscosity cP (25ºC) 42,000
Pt-Co (APHA) Color 5
Refractive Index (25ºC) 1.456
Density, g/cm3 (25ºC) 1.01
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 21A 32A 61D 36D 93A 25A
Elastic Modulus (GPa [ksi]) 1.0 [0.15] 4.6 [0.66] 448.2 [65] 137.9 [20] 172.4 [25]
Elongation (%) 120 400 2.6 19.4 6.5 290
MEK Double Rubs (#) 4 4 10 5 6 10
Tensile Strength (MPa [psi]) 0.7 [95] 4.1 [600] 10.3 [1500] 7.6 [1100] 7.6 [1100] 0.8 [110]
Water Absorption (%) 24hrs 1.21 0.82 1.69 1.51 1.29 6.82
Viscosity (cP) 5,500 @ 25ºC 1,400 @ 25ºC 4,800 @ 25ºC 1,500 @ 25ºC 900 @ 25ºC 4,200 @ 25ºC

Features

  • Color stability for better aesthetics
  • Easy to paint or finish for better looking products
  • Low moisture absorption to minimize distortion of parts
  • Low Tg and very high elongation
  • Soft surface hardness
  • High elongation for impact resistance

Applications

  • Rapid prototyping
  • Concrete coating flexiblizer
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