Bomar Oligomers® BRC-843S

1 of 88 products in this brand

Bomar™ BRC-843S 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 a functional, non-yellowing, protective single-coating that extends the substrates use-life. BRC-843S is a softer and more flexible version of BRC-843. This oligomer is also tougher then BRC-843. The low water absorption and alkaline resistance make this oligomer perfect for specialty applications in the following industries: aerospace, appliance, automotive, electronic, coatings & inks for steel, plastic, glass and medical device.

Chemical Family: Urethane Acrylate/Isocyanate

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Features
  • Improves Adhesion
  • High Temperature Resistance
  • Enhances Hardness
  • Increases Weatherability
  • Non-Yellowing and High Gloss
  • Provides Alkaline Resistance
  • Low Water Absorption

Applications & Uses

Compatible Substrates & Surfaces

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (50 °C)40,000cP
Pt-Co Color (APHA)max. 100
Pt-Co Colormax. 100APHA
Refractive Index (25°C)1.480
Density (25°C)1.1g/cm3

Technical Details & Test Data

Typical Formulations
Test Formulation Name I30 I50 TP50 TM50 H50 HE30

BRC-843S

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 (CAP2000+) 24,000 3,000 3.200 13,000 1.500 9.900

 

Cured Mechanical Properties
Property I30 I50 TP50 TM50 H50 HE30
Tensile Strength, (psi, ASTM D882)

2.100

4.700

2.800

4.000

3.300

1.100
Elongation (%, ASTM D882) 310 390 32 5.9 15 240
Elastic Modulus (ksi, ASTM D882)

0.8

1.5

16

94

39

0.6
Durometer Hardness

36D

60D

61D

80D

66D

75D

Water Absorption, %(24 hrs)

0.4 0.28 0.61 0.56 0.51 3.73
MEK Double Rubs (#) 21 25 69 >200 195 18
Tg(DMA) = -9°C; Peak tan delta; cured with 2 phr of Irgacure® 184
Adhesion Properties
Substrate I30 I50 TP50 TM50 H50 HE30
Aluminum XX XXX X     XX
Cold Rolled Steel XX XXX X     XX
Glass XX XXX X   XX XX
HDPE            
Polycarbonate XXX XXX XXX XXX XX  
PET XX XXX     XX XX
PMMA XX XXX     XXX XX
Stainless Steel XX XXX       XX

X - Recommended, XX - Highly Recommended, XXX - Strongly Recommended

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BRC-843S Viscosity Reduction with Reactive Diluents

Safety & Health

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.