Bomar Oligomer Product
UV/EB Oligomer

BR-571MB

BR-571MB: Difunctional Aliphatic Polyether Urethane Methacrylate Oligomer

BR-571MB, a difunctional, aliphatic polyether urethane methacrylate, is used for its desirable balance of toughness and flexibility and its ability to adhere to a variety of substrates. It is an excellent choice for impact-resistant coatings. BR-571MB also brings desirable weather resistance and low-yellowing properties to formulations utilizing it.

Neat Properties
Property Value
Viscosity cP (60ºC) 27,000
Pt-Co (APHA) Color 15
Refractive Index (25ºC) 1.494
Density, g/cm3 (25ºC) 1.07
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 70D 77D 86D 74D 77D 71D
Elastic Modulus (GPa [ksi]) 689.5 [100] 1,447.9 [210] 1,930.5 [280] 896.3 [130] 965.3 [140] 758.4 [110]
Elongation (%) 65 25 3.6 7.5 6.1 65
MEK Double Rubs (#) 80 22 >200 91 >200 122
Tensile Strength (MPa [psi]) 27.6 [4000] 26.2 [3800] 47.6 [6900] 25.5 [3700] 31.0 [4500] 26.2 [3800]
Water Absorption (%) 24hrs 0.38 0.23 0.48 0.58 0.40 1.56
Viscosity (cP) 31,000 @ 25ºC 2,700 @ 25ºC 13,000 @ 25ºC 2,600 @ 25ºC 1,000 @ 25ºC 9,500 @ 25ºC

Features

  • Impross adhesion
  • Enhances flexibility
  • Provides abrasion resistance
  • Provides weatherability
  • Low yellowing
  • Gloss finish

Applications

  • Scratch-resistant coatings
  • Hard glossy coatings
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