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Bomar Oligomers® BR-372

1 of 88 products in this brand
BOMART BR-372, a medium molecular weight, di-functional, aliphatic polyether urethane acrylate oligomer, is a material offering a balance of toughness and flexibility, with very low color. Formulations with BR-372 yield high clarity films with adhesion to a variety of plastics, and can also be used in the manufacture of UV-curable fiberglass matrix resins. This material has low skin sensitivity for dental and cosmetic applications.

Chemical Family: Urethane Acrylate/Isocyanate

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Product Highlights
  • Enhances Flexibility
  • Low Color
  • Increases Hardness
  • Improves Adhesion
  • Low Skin Sensitivity

Applications & Uses

Compatible Substrates & Surfaces

Properties

Physical Form
Cured Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature (Tg)36.0°C-
Uncured Properties
ValueUnitsTest Method / Conditions
Density (25°C)1.1g/cm³
Pt-Co Color (APHA)max. 50--
Refractive Index (25°C)1.4--
Viscosity at 50°C20000.0cP-
Viscosity at 60°C8500.0--

Technical Details & Test Data

Typical Formulations
TYPICAL FORMULATIONS  
Test Formulation Name I30 I50 TM50 TP50 H50 HE30
BR-372 70 50 50 50 50 70
IBOA 30 50        
TMPTA     50      
TPGDA       50    
HDDA         50  
HEMA           30
Omnirad™ 481 2 2 2 2 2 2
Viscosity, 25°C * 9,500 975 5,350 1,075 400 -
* Brookfield – Small Samples Adapter  

 

CURED MECHANICAL PROPERTIES
Property I30 I50 TM50 TP50 H50
Tensile Strength, psi** 2,245 2,612 3,964 1,767 2,710
Elongation, %** 91.5 82.5 5 13 9
Elastic Modulus, ksi** 25.2 79.7 119.5 62.0 80.1
Durometer Hardness 65D 75D 85D 69D 76D
MEK Double Rubs (#) 7 8 >200 76 >200
T g (DMA ) =36°C ;Peaktan delta; cured with 2 phr of Irgacure ® 481
** Per ASTM D882

Brookfield – CAP 2000+ @ 25°C

ADHESION PROPERTIES
Substrate I30 I50 TM50 TP50 H50
ABS       XX XXX
Acrylic (PMMA) X     X XXX
Aluminum XX XX      
Cold Rolled Steel X X      
Glass X X      
HDPE          
Polycarbonate       XX XXX
Stainless Steel XX XXX      

X Recommended XX Highly Recommended XXX Strongly Recommended

Viscosity Reduction With Reactive Diluents

   Dymax Corporation Bomar BR-372 Viscosity Reduction With Reactive Diluents