Bomar Oligomer Product
UV/EB Oligomer

BRC-4421

BRC-4421: Difunctional Aliphatic Hydrophobic Urethane Acrylate Oligomer

BRC-4421 is a difunctional, hydrophobic urethane acrylate that can be formulated into chemical and temperature-resistant coatings and resins. The material has low color and excellent adhesion to a wide variety of plastics. The material can be formulated into tough, impact-resistant 3D printing resins with excellent flexibility. It's ultra-low water absorption makes this an excellent choice for moisture-sensitive or hydrophobic applications.

Neat Properties
Property Value
Viscosity cP (60ºC) 6,600
Pt-Co (APHA) Color 50
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.09
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 75D 81D 88D 79D 81D 75D
Elastic Modulus (GPa [ksi]) 620.5 [90] 1,447.9 [210] 1,999.5 [290] 1,034.2 [150] 1,103.2 [160] 172.4 [25]
Elongation (%) 120 30 3.1 11 6.8 120
MEK Double Rubs (#) 72 25 >200 98 62 18
Tensile Strength (MPa [psi]) 20.7 [3000] 22.8 [3300] 42.7 [6200] 24.1 [3500] 31.0 [4500] 9.0 [1300]
Water Absorption (%) 24hrs 0.17 0.13 0.27 0.3 0.21 0.99
Viscosity (cP) 6,800 @ 25ºC 1,100 @ 25ºC 5,300 @ 25ºC 1,200 @ 25ºC 500 @ 25ºC 2,600 @ 25ºC

Features

  • Excellent plastics adhesion
  • Non-yellowing
  • Excellent hydrophobicity
  • Imparts toughness
  • Glossy finish
  • Provides abrasion resistance

Applications

  • Tough 3D printing resins
  • Impact-resistant coatings for plastics
  • Moisture-sensitive coatings or adhesives
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