company tower banner
Bomar Specialties LLC Company Logo

Bomar Oligomers® BRC-841

1 of 88 products in this brand
Bomar™ BRC-841 is a low-molecular-weight, difunctional, hydrophobic urethane acrylate that can be effectively formulated for steel and various plastichard coatings. The resulting hard, tough film makes an effective non-yellowing protective single-coating. The low water absorption and alkaline resistance make BRC-841 ideal for the following industries: aerospace, automotive, appliances, cosmetic, electronic, industrial, medical devices, metal finishing, and UV-curable inks and coatings.

Chemical Family: Urethane Acrylate/Isocyanate

End Uses: Radiation Curable Coating

Technical Data Sheet
  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Features
  • Improves Adhesion
  • Increases Weatherability
  • Enhances Hardness
  • Provides Abrasion Resistance
  • Non-Yellowing
  • Gloss Finish
  • Low Water Absorption
  • Excellent Chemical Resistance

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Applications
  • Coatings and inks for steel
  • Coatings and inks for plastic

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (50 °C)40,000cP
Pt-Co Color (APHA)max.50
Pt-Co Colormax.50APHA
Refractive Index (25°C)1.495
Density (25°C)1.10g/cm3

Technical Details & Test Data

Typical Formulations

Adhesion Properties
Substrate I30 I50 TM50 TP50 H50 HE30
ABS X   XXX XXX XXX XXX
Aluminum            

Cold Rolled Steel

           
Glass            
HDPE           X
PET XXX XX XXX XXX XXX XXX
PMMA X XXX XXX XXX XXX  
Polycarbonate X XXX XXX XXX XXX  
Polypropylene            
PVC XXX XXX XXX XXX XXX XX
Stainless Steel            

X Recommended XX Highly Recommended XXX Strongly Recommended

Typical Formulations
Test Formulation Name 130 150 TM50 TP50 H50 HE30
BR-742M 70 50 50 50 50 70
IBOA 30 50        
TMPTA     50      
TPGDA       50    
HDDA         50  
HEMA           30
Omnirad 184 2 2 2 2 2 2
Viscosity, 25°C* 13,000 1,900 5,700 1,700 500 4,200

* Brookfield – CAP 2000+ @ 25°C.

Cured Mechanical Properties
Property I30 I50 TM50 TP50 H50 HE30

Tensile Strength, psi**

7,500 9,500 7,500 6,000 6,700 4,800
Elongation, 6** 4.7 3.9 22 3 4 8

Elastic Modulus, ksi*

290 360 400 280 240 240

Durometer Hardness

86D 85D 91D 84D 86D 86D

Water Absorption, 96 (24 hrs)

0.37 0.25 0 0.6 0.43 2

MEK Double Rubs (#)

10 6 >200 86 170 63
Tg(DMA)=41°C; Peak tan delta; cured with 2 phr of Omnirad® 184

** Per ASTM D882 – Not Tested || Incompatible X Unable to Measure

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BRC-841 Viscosity Reduction with Reactive Diluents