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Bomar Oligomers® BRC-843

1 of 88 products in this brand
Bomar™ BRC-843 is a difunctional, hydrophobic urethane acrylate which can be formulated to be used in heavy-duty industrial and commercial applications. The resulting tough film makes an effective, non-yellowing, protective single-coating that extends the substrates use-life. The low water absorption and alkaline resistance make this oligomer perfect for the following industries: aerospace, appliance, automotive, cosmetic, electronic, industrial, medical device, metal finishing, and UV-curable inks & coatings. BRC-843 exhibits retention of mechanical properties after exposure to high temperatures (200oC for 30 minutes). In addition to the adhesion properties listed in the table below, BRC-843 also shows excellent adhesion to ABS, PVC, PMMA, and Polystyrene. This material has low skin sensitivity for dental and cosmetic applications.

Chemical Family: Urethane Acrylate/Isocyanate

End Uses: Radiation Curable Coating

Technical Data Sheet
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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
  • Provides Alkaline Resistance
  • High Temperature Resistance
  • Low Skin Sensitivity

Applications & Uses

Compatible Substrates & Surfaces
Cure Method
Applications
  • Moisture resistant coatings and adhesives
  • Coatings and inks for plastic
  • Coatings and inks for glass

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Pt-Co Color (APHA)29
Pt-Co Color29APHA
Refractive Index (25°C)1.48
Density (25°C)1.09g/cm3
Viscosity (25 °C)90,000cP

Regulatory & Compliance

General Information

This product is intended for industrial use only. Keep out of the reach of children. Avoid breathing vapors. Avoid contact with skin, eyes, and clothing. Wear impervious gloves. Repeated or continuous skin contact with uncured material may cause irritation. Remove material from skin with soap and water. Never use organic solvents to remove material from skin and eyes. For more information on the safe handling of this material, please refer to the Safety Data Sheet before use.

Technical Details & Test Data

Typical Formulations

Adhesion Properties
Substrate I30 I50 TM50 TP50 H50 HE30
ABS            
Aluminum XX XX   XX    

Cold Rolled Steel

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

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* 5,700 900 1,000 500 2,300

* Brookfield – CAP 2000+ @ 25°C.

Cured Mechanical Properties
Property I30 I50 TM50 TP50 H50 HE30

Tensile Strength, psi**

1,400 1,300 - 1,200 1,200 1,000
Elongation, 6** 180 70 - 13 5 160

Elastic Modulus, ksi*

0.8 8 - 20 30 1

Durometer Hardness

52D 70D - 70D 72D 31D

Water Absorption, 96 (24 hrs)

0.4 0.3 - 0.6 0.5 25

MEK Double Rubs (#)

22 19 - 35 >200 62
Tg(DMA)=32°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-843 Viscosity Reduction with Reactive Diluents