Bomar Oligomer Product
UV/EB Oligomer

BR-742S

BR-742S: Difunctional Aliphatic Polyester Urethane Methacrylate Oligomer

BR-742S is a difunctional, polyester Urethane Acrylate Oligomer that offers good weatherability. High-impact-strength coatings and inks can be formulated that are non-yellowing and have high gloss. This material offers low shrinkage, which is excellent for 3D printing applications. Furthermore, BR-742S is registered with INCI for cosmetic applications.

Neat Properties
Property Value
Viscosity cP (60ºC) 25,000
Pt-Co (APHA) Color 30
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.11
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 80D 82D 90D  79D 81D 76D
Elastic Modulus (GPa [ksi]) 551.6 [80] 1,103.2 [160] 1,310.0 [190] 586.1 [85] 758.4 [110] 68.9 [10]
Elongation (%) 76 11 4 21 10 130
MEK Double Rubs (#) 29 17 >200 129 96 23
Tensile Strength (MPa [psi]) 31.0 [4500] 47.6 [6900] 44.8 [6500] 33.8 [4900] 40.0 [5800] 2.9 [422]
Water Absorption (%) 24hrs 0.25 0.18 0.35 0.44 0.31 1.66
Viscosity (cP) 16,500 @ 25ºC 1,100 @ 25ºC 7,600 @ 25ºC 1,100 @ 25ºC 360 @ 25ºC 2,800 @ 25ºC

Features

  • Non-yellowing
  • High clarity and gloss
  • High abrasion resistance
  • High impact strength
  • Low shrinkage
  • High elongation
  • Balance of hardness and flexibility
  • Low skin sensitivity

Applications

  • Nail coating
  • 3D printing resin
  • Wood and floor coating
  • Electronic coatings and inks
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