Bomar Oligomer Product
UV/EB Oligomer

BR-744SD

BR-744SD: Difunctional Aliphatic Polyester Urethane Acrylate

BR-744SD is a difunctional, aliphatic polyester urethane acrylate offering excellent adhesion, flexibility, and tensile strength. It can be effectively formulated for adhesion to steel, aluminum, and various plastics. Products formulated with BR-744SD can be highly flexible, elastomeric, and tacky. It is excellent as an adhesion promoter or reactive tackifier, and is a perfect choice for optically clear UV-PSAs.

Neat Properties
Property Value
Viscosity cP (60ºC) 7,000
Pt-Co (APHA) Color 35
Refractive Index (25ºC) 1.474
Density, g/cm3 (25ºC) 1.11
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 65A 48D 80D 55D 61D 82A
Elastic Modulus (GPa [ksi]) 3.1 [0.45] 9.8 [1.42] 620.5 [90] 115.8 [16.8] 241.3 [35] 5.9 [0.86]
Elongation (%) 320 360 5.4 30 12.0 250
MEK Double Rubs (#) 37 28 >200 62 40 30
Tensile Strength (MPa [psi]) 9.7 [1400] 24.1 [3500] 26.2 [3800] 17.9 [2600] 17.9 [2600] 11.7 [1700]
Water Absorption (%) 24hrs 0.51 0.31 0.64 0.73 0.55 4.66
Viscosity (cP) 8,300 @ 25ºC 1,300 @ 25ºC 7,000 @ 25ºC 1,500 @ 25ºC 700 @ 25ºC 600 @ 25ºC

Features

  • Excellent adhesion to various substrates
  • Excellent flexibility
  • Excellent tensile strength
  • Highly elastomeric
  • Excellent reactive tackifier
  • Excellent optical clarity

Applications

  • Excellent optical clarity
  • Metal and plastic coatings
  • Electronics
  • Inks
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