Bomar Oligomer Product
UV/EB Oligomer

BR-742MS

BR-742MS: Difunctional Aliphatic Polyester Urethane Acrylate Oligomer

BR-742MS is a variant of BR-742M with non-detectable (<10 ppm) MeHQ content to comply with regulatory requirements for both salon and retail nail coating applications in Europe.
This oligomer has an excellent balance of gloss, low color, removability, durability, and low heat generation during the cure process.

Neat Properties
Property Value
Viscosity cP (60ºC) 25,000
Pt-Co (APHA) Color 25
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.11
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 81D 84D 90D 81D 82D 80D
Elastic Modulus (GPa [ksi]) 482.6 [70] 1,172.1 [170] 1,516.8 [220] 689.5 [100] 827.4 [120] 448.2 [65]
Elongation (%) 65 65 3.0 8.0 7.0 100
MEK Double Rubs (#) 10 7 >200 15 70 45
Tensile Strength (MPa [psi]) 15.9 [2300] 22.1 [3200] 38.6 [5600] 21.4 [3100] 30.3 [4400] 17.9 [2600]
Water Absorption (%) 24hrs 0.31 0.21 0.39 0.49 0.36 1.43
Viscosity (cP) 18,000 @ 25ºC 1,400 @ 25ºC 8,900 @ 25ºC 1,400 @ 25ºC 400 @ 25ºC 3,500 @ 25ºC

Features

  • Undetectable MeHQ levels (<10 ppm)
  • Fast acetone soak-off
  • Good balance of toughness and elongation
  • Low color
  • Glossy finish
  • Low heat generation

Applications

  • Nail gel color coats
  • Nail gel topcoats
  • Nail art gels
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