Bomar Oligomer Product
UV/EB Oligomer

BR-990

BR-990: Trifunctional Aliphatic Urethane Acrylate Oligomer

BR-990, an aliphatic polyether urethane triacrylate, is a more flexible option from the BR-900 series of high-purity oligomers. BR-990 can be used effectively in performance coatings applications needing a greater degree of flexibility than is offered by higher functionality materials of the same product line. In addition, BR-990 offers one of the lowest viscosity profiles of any urethane acrylate.

Neat Properties
Property Value
Viscosity cP (25ºC) 34,000
Pt-Co (APHA) Color 50
Refractive Index (25ºC) 1.49
Density, g/cm3 (25ºC) 1.15
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 61D 80D 86D 74D 77D 44A
Elastic Modulus (GPa [ksi]) 65.5 [9.5] 965.3 [140] 1,516.8 [220] 241.3 [35] 482.6 [70] 172.4 [25]
Elongation (%) 40 65 3.5 12 10 35
MEK Double Rubs (#) 30 20 >200 64 >200 25
Tensile Strength (MPa [psi]) 14.5 [2100] 28.3 [4100] 34.5 [5000] 10.3 [1500] 15.9 [2300] 4.8 [700]
Water Absorption (%) 24hrs 0.38 0.28 0.45 0.53 0.4 2.14
Viscosity (cP) 2,100 @ 25ºC 420 @ 25ºC 2,000 @ 25ºC 480 @ 25ºC 220 @ 25ºC 940 @ 25ºC

Features

  • Excellent adhesion to difficult plastic substrates
  • Low viscosity
  • Non-yellowing
  • Excellent hydrolytic stability
  • Flexible trifunctional oligomer
  • Abrasion resistance
  • Glossy finish
  • Improves weatherability

Applications

  • Flexible hard coatings
  • Plastics adhesives
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