Bomar Oligomer Product
UV/EB Oligomer

BR-551ME

BR-551ME: 1.5 Functional Aliphatic Polyether Urethane Methacrylate Oligomer

BR-551ME is an oligomer that provides excellent acetone removability when used in gel polish applications. Low heat generation occurs during cure with UV/LED lamps that are typically used in nail gel polish applications. The resultant coating also has high gloss and has low APHA color impact. Furthermore, this oligomer was designed to meet regulatory expectations for salon applications in Europe.

Neat Properties
Property Value
Viscosity cP (25ºC) 17,000
Pt-Co (APHA) Color 18
Refractive Index (25ºC) 1.480
Density, g/cm3 (25ºC) 1.05
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 70D 79D 86D 74D 76D 69D
Elastic Modulus (GPa [ksi]) 344.7 [50] 1,310.0 [190] 1,930.5 [280] 586.1 [85] 965.3 [140] 413.7 [60]
Elongation (%) 50 50 1.3 11.9 5.5 25
MEK Double Rubs (#) 7 14 >200 24 107 8
Tensile Strength (MPa [psi]) 13.8 [2000] 22.1 [3200] 19.3 [2800] 21.4 [3100] 29.6 [4300] 9.7 [1400]
Water Absorption (%) 24hrs 0.26 0.17 0.26 0.32 0.2 1.32
Viscosity (cP) 1,300 @ 25ºC 250 @ 25ºC 1,100 @ 25ºC 280 @ 25ºC 130 @ 25ºC 560 @ 25ºC

Features

  • Fast acetone soak-off
  • Very low viscosity
  • Low heat generation
  • Low APHA color
  • High gloss
  • Low MeHQ levels

Applications

  • LED curing gel polish
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