Bomar Oligomer Product
UV/EB Oligomer

BR-744BT

BR-744BT: Difunctional Aliphatic Polyester Urethane Acrylate Oligomer

BR-744BT is an aliphatic difunctional polyester urethane acrylate offering excellent adhesion, toughness, and flexibility. BR-744BT provides excellent flexibility and high elongation to
UV formulations, and can provide impact and chip resistance to nail gel polishes. This material has low skin sensitivity for dental and cosmetic applications and is INCI listed.

Neat Properties
Property Value
Viscosity cP (60ºC) 46,000
Pt-Co (APHA) Color 45
Refractive Index (25ºC) 1.496
Density, g/cm3 (25ºC) 1.11
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 75A 58D 81D 59D 65D 55A
Elastic Modulus (GPa [ksi]) 16.5 [2.4] 310.3 [45] 758.4 [110] 172.4 [25] 310.3 [45] 18.6 [2.7]
Elongation (%) 160 170 3 12 6 120
MEK Double Rubs (#) >200 56 >200 49 68 89
Tensile Strength (MPa [psi]) 6.9 [1000] 13.8 [2000] 17.9 [2600] 7.6 [1100] 11.0 [1600] 4.1 [600]
Water Absorption (%) 24hrs 0.44 0.37 0.56 0.69 0.52 3.78
Viscosity (cP) 23,000 @ 25ºC 2,800 @ 25ºC 16,000 @ 25ºC 2,700 @ 25ºC 1,200 @ 25ºC 7,500 @ 25ºC

Features

  • Improves adhesion
  • Enhances flexibility and elongation
  • Provides impact resistance
  • Non-yellowing
  • Provides weather resistance
  • Gloss finish
  • Low skin irritation
  • Low MeHQ levels

Applications

  • Nail gel coatings
  • Flexible 3D printing resins
  • Plastic coatings
  • Peelable coatings
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