Bomar Oligomers® BR-742S

1 of 88 products in this brand
Bomar™ BR-742S is a difunctional, polyester Urethane Acrylate Oligomer that offers good weatherability. High-impact-strength coatings and inks can be formulated that are non-yellowing and have high gloss. This material offers low shrinkage, which is excellent for 3D printing applications. Furthermore, BR-742S is registered with INCI for 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
  • Non-Yellowing
  • Low Shrinkage
  • High Clarity and Gloss
  • High Elongation
  • High Abrasion Resistance
  • Balance of Hardness and Flexibility
  • High Impact Strength
  • Low Skin Sensitivity

Applications & Uses

Compatible Substrates & Surfaces
Recommended Application
  • Nail Coating
  • 3D Printing Inks
  • Wood and Floor Coating
  • Electronic Coatings and Inks

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (60 °C)25,000cP
Pt-Co Color (APHA)30
Pt-Co Color30APHA
Refractive Index (25°C)1.48
Density (25°C)1.11g/cm3

Technical Details & Test Data

Typical Formulations
Test Formulation Name I30 I50 TP50 TM50 H50 HE30

BR-742S

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+)

16.500

1.100 1.100 7.600 360 2.800

 

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

4.500

6.900

4.900

6.500

5.800

4.200
Elongation (%, ASTM D882) 76 11 21 4 10 130
Elastic Modulus (ksi, ASTM D882)

80

160

85

194

105

10
Durometer Hardness

80D

82D

79D

90D

81D

76D

Water Absorption, %(24 hrs)

0.25 0.18 0.44 0.35 0.31 1.66
MEK Double Rubs (#) 29 17 129 >200 93 23
Tg(DMA) = 66°C; Peak tan delta; cured with 2 phr of Irgacure® 184
Adhesion Properties
Substrate I30 I50 TP50 TM50 H50 HE30
Aluminum XX XXX X   X  
Cold Rolled Steel XX XX XX     XX
Glass X XXX       XXX
HDPE            
Polycarbonate XXX XXX XXX XXX XXX XX
PET            
PMMA XX XXX X   XXX XX
Stainless Steel XXX XXX XX   X XXX

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

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BR-742S 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.