Bomar Oligomer Product
UV/EB Oligomer

XR-741MS

XR-741MS: Difunctional Aliphatic Polyester Urethane Methacrylate Oligomer

XR-741MS, a low molecular weight, difunctional, aliphatic polyester urethane methacrylate, can be effectively formulated for adhesion to steel, aluminum, and various plastics. The
resulting hard, tough film makes an effective, non-yellowing protective coating. This material has low skin sensitivity for dental and cosmetic applications.

Neat Properties
Property Value
Viscosity cP (60ºC) 52,000
Pt-Co (APHA) Color 30
Refractive Index (25ºC) 1.500
Density, g/cm3 (25ºC) 1.24
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 89D 88D 91D 86D 86D 90D
Elastic Modulus (GPa [ksi]) 2,206.3 [320] 2,068.4 [300] 2,344.2 [340] 1,723.7 [250] 1,516.8 [220] 1,723.7 [250]
Elongation (%) 4.5 3.5 3.5 6.5 4.5 7
MEK Double Rubs (#) 145 13 >200 >200 >200 >200
Tensile Strength (MPa [psi]) 55.8 [8100] 55.8 [8100] 60.7 [8800] 44.8 [6500] 45.5 [6600] 42.7 [6200]
Water Absorption (%) 24hrs 0.21 0.18 0.33 0.38 0.31 0.79
Viscosity (cP) 19,000 @ 25ºC 1,000 @ 25ºC 8,000 @ 25ºC 1,100 @ 25ºC 300 @ 25ºC 3,000 @ 25ºC

Features

  • Methacrylate functionality for low skin sensitivity
  • Glossy finish
  • Excellent non-yellowing
  • High tensile strength and modulus
  • Excellent adhesion to plastic substrates

Applications

  • Hard gel nail coatings
  • High hardness coatings
  • Dental resins
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