Bomar Oligomer Product
UV/EB Oligomer

BR-3641AJ

BR-3641AJ: 1.3 Functional Aliphatic Polyether Urethane Acrylate Oligomer

BR-3641AJ is an aliphatic polyether urethane acrylate with a high molecular weight and theoretical 1.3 functionality. Films formulated with BR-3641AJ are highly flexible, elastomeric, and tacky. It is excellent as an adhesion promoter or reactive tackifier. It is a perfect choice for optically clear UV-PSAs.

Neat Properties
Property Value
Viscosity cP (60ºC) 10,000
Pt-Co (APHA) Color 15
Refractive Index (25ºC) 1.46
Density, g/cm3 (25ºC) 1.01
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 17A 62A 56D 27D 41D 13A
Elastic Modulus (GPa [ksi]) 0.2 [0.03] 35.9 [5.2] 344.7 [50] 103.4 [15] 137.9 [20] X
Elongation (%) 400 500 2.2 13.7 5.9 X
MEK Double Rubs (#) 9 8 5 2 15 20
Tensile Strength (MPa [psi]) 0.3 [50] 4.1 [600] 6.9 [1000] 4.1 [600] 4.8 [700] X
Water Absorption (%) 24hrs 1.25 0.81 1.7 1.49 1.28 7.45
Viscosity (cP) 9,500 @ 25ºC 1,900 @ 25ºC 8,400 @ 25ºC 2,300 @ 25ºC 1,300 @ 25ºC 7,000 @ 25ºC

Features

  • Optical clarity
  • Exhibits hydrolytic stability
  • Resilience
  • Tenacious adhesion
  • Enhances weatherability
  • Non-yellowing

Applications

  • Pressure-sensitive adhesives (PSA)
  • Adhesion promoter
  • Reactive tackifier
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