Bomar Oligomer Product
UV/EB Oligomer

BR-541S

BR-541S: Difunctional Aliphatic Polyether Urethane Acrylate Oligomer

BR-541S is a difunctional, polyether urethane acrylate that is used for its desirable balance of toughness and flexibility. It adheres readily to a variety of substrates including cold rolled steel, glass, PC, and stainless steel. It is an excellent choice for impact-resistant coatings. BR-541S is desirable for use in cosmetic applications where color stability and optically clear tough coatings are needed.

Neat Properties
Property Value
Viscosity cP (60ºC) 3,000
Pt-Co (APHA) Color 50
Refractive Index (25ºC) 1.49
Density, g/cm3 (25ºC) 1.06
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 62D 77D 87D 75D 76D 35D
Elastic Modulus (GPa [ksi]) 48.3 [7] 482.6 [70] 1,034.2 [150] 344.7 [50] 517.1 [75] 27.6 [4]
Elongation (%) 120 80 4 17 9 140
MEK Double Rubs (#) 18 9 >200 21 40 6
Tensile Strength (MPa [psi]) 21.4 [3100] 23.4 [3400] 35.9 [5200] 24.1 [3500] 26.9 [3900] 19.3 [2800]
Water Absorption (%) 24hrs 0.52 0.32 0.48 0.66 0.48 2.67
Viscosity (cP) 3,800 @ 25ºC 600 @ 25ºC 2,600 @ 25ºC 600 @ 25ºC 230 @ 25ºC 1,300 @ 25ºC

Features

  • Color stable
  • Optically clear
  • Fast cure rates
  • Gloss finish
  • Weatherability
  • Improves adhesion

Applications

  • Hard glossy coatings
  • Scratch-resistant coatings
  • Inks
  • Overprint varnishes
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