Bomar Oligomer Product
UV/EB Oligomer

BR-3641AA

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

BR-3641AA is an aliphatic polyether urethane acrylate with a high molecular weight and theoretical 1.3 functionality. Films formulated with BR-3641AA are highly flexible, elastomeric, and tacky. When formulated as an adhesive, this oligomer is excellent as an adhesion promoter or reactive tackifier. This oligomer offers improved adhesion to a variety of substrates.

Neat Properties
Property Value
Viscosity cP (60ºC) 7,000
Pt-Co (APHA) Color 10
Refractive Index (25ºC) 1.46
Density, g/cm3 (25ºC) 1.00
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 09A 24D 59D 35D 40D
Elastic Modulus (GPa [ksi]) X X X X X
Elongation (%) 170 1,000 2.7 15 8.2
MEK Double Rubs (#) 19 9 131 8 8
Tensile Strength (MPa [psi]) 0.1 [20] 3.0 [440] 6.2 [900] 4.8 [700] 4.8 [700]
Water Absorption (%) 24hrs 1.23 0.75 1.75 1.6 1.31
Viscosity (cP) 7,600 @ 25ºC 1,700 @ 25ºC 7,500 @ 25ºC 2,000 @ 25ºC 1,300 @ 25ºC 6,300 @ 25ºC

Features

  • Low color
  • Exhibits hydrolytic stability
  • Good weatherability
  • Tenacious adhesion
  • High elongation and resilience
  • Non-yellowing

Applications

  • Pressure-sensitive adhesives
  • Adhesion promoter
  • Reactive tackifier
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