Bomar Oligomer Product
UV/EB Oligomer

BRC-8430E

BRC-8430E: Hydrophobic Urethane Acrylate Oligomer

BRC-8430E is a reduced-functionality version of BRC-843S that provides improved flexiblity and reduced modulus compared with BRC-843S. The hydrophobic and temperature resistant backbone of BRC-8430E combined with the low modulus make BRC-8430E an excellent candidate for moisture resistant adhesives, coatings, and resins, as well as formulations that need to pass autoclave or 85/85 testing.

Neat Properties
Property Value
Viscosity cP (60ºC) 22,000
Pt-Co (APHA) Color 45
Refractive Index (25ºC) 1.48
Density, g/cm3 (25ºC) 1.10
Monomer Dilution Properties
Value
Property I30 I50 TM50 TP50 H50 HE30
Durometer Hardness 70A 45D 76D 56D 61D 59A
Elastic Modulus (GPa [ksi]) 20.0 [2.9] 172.4 [25] 827.4 [120] 241.3 [35] 344.7 [50] 6.3 [0.92]
Elongation (%) 230 170 2.9 11.3 5.4 120
MEK Double Rubs (#) 47 11 >200 35 38 5
Tensile Strength (MPa [psi]) 6.2 [900] 11.0 [1600] 19.3 [2800] 9.0 [1300] 11.0 [1600] 2.8 [400]
Water Absorption (%) 24hrs 0.44 0.32 0.56 0.62 0.5 3.23
Viscosity (cP) 29,000 @ 25ºC 4,000 @ 25ºC 18,000 @ 25ºC 4,200 @ 25ºC 2,000 @ 25ºC 12,000 @ 25ºC

Features

  • Low Tg
  • Hydrophobic
  • Flexible
  • Low yellowing
  • Broad adhesion to glass, metals, and plastics

Applications

  • Low modulus hydrophobic formulations
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