Bomar Oligomer Product
UV/EB Oligomer

BR-541MB

BR-541MB: Difunctional Aliphatic Polyether Urethane Methacrylate Oligomer

BR-541MB is a difunctional aliphatic polyether urethane methacrylate. BR-541MB is used for its desirable balance of toughness and flexibility and its ability to adhere to a variety of substrates. This oligomer is an excellent candidate to consider for use in impact-resistant coatings on various substrates when used with BR-543MB. This material has low skin sensitivity and is INCI registered for compliance in cosmetic applications.

Neat Properties
Property Value
Viscosity cP (60ºC) 6,400
Pt-Co (APHA) Color 15
Refractive Index (25ºC) 1.49
Density, g/cm3 (25ºC) 1.07
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 74D 81D 87D 77D 80D 76D
Elastic Modulus (GPa [ksi]) 586.1 [85] 1,516.8 [220] 1,723.7 [250] 758.4 [110] 1,034.2 [150] 344.7 [50]
Elongation (%) 85 55 3.4 15 6.8 100
MEK Double Rubs (#) 73 35 >200 30 90 28
Tensile Strength (MPa [psi]) 28.3 [4100] 26.9 [3900] 40.7 [5900] 22.8 [3300] 31.0 [4500] 21.4 [3100]
Water Absorption (%) 24hrs 0.44 0.28 0.52 0.6 0.46 1.87
Viscosity (cP) 7,400 @ 25ºC 1,000 @ 25ºC 4,600 @ 25ºC 1,000 @ 25ºC 400 @ 25ºC 2,400 @ 25ºC

Features

  • High tensile strength
  • Excellent optical clarity
  • Exhibits hydrolytic stability
  • Low skin sensitivity
  • Improved adhesion
  • Provides weatherability
  • Non-yellowing

Applications

  • Nail coatings
  • Optically clear coatings
  • Scratch-resistant coatings
  • High-impact 3D printing resins
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