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Bomar Oligomers® BR-742M

1 of 88 products in this brand

BR-742M is a medium molecular weight, difunctional, aliphatic polyester urethane methacrylate offering excellent adhesion, flexibility, and hardness balance. BR-742M offers an excellent balance of gloss, low heat generation, low color, and low MeHQ for nail coating applications. It canalso be effectively formulated for adhesion to steel, aluminum, and glass. Due to its low solvent resistance, it can be formulated into solvent strippable temporary coatings. 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
  • Improves adhesion
  • Balance of hardness and flexibility
  • Low heat generation during cure
  • Low MeHQ
  • Low skin irritation
  • Non-yellowing
  • Glossy finish

Applications & Uses

Compatible Substrates & Surfaces
Recommended Application
  • Nail gel polish
  • Coatings for glass
  • Coatings for metals

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (60 °C)28,000cP
Pt-Co Color15APHA
Refractive Index (25°C)1.484
Density (25°C)1.110g/cm3

Technical Details & Test Data

Typical Formulations
Test Formulation Name I30 I50 TM50 TP50 H50 HE30

BR-742M

70 50 50 50 50 70
IBOA 30 50        
TMPTA     50      
TPGDA       50    
HDDA         50  
HEMA           30

Irgacure® 184

2 2 2 2 2 2
Viscosity, 25°C (CAP2000+)

17.000

1.200 8.600 1.200 400 3.200

 

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

2.900

3.600

4.800

3.700

4.400

2.100
Elongation (%, ASTM D882) 70 7.6 2.3 13.1 5.7 70
Elastic Modulus (ksi, ASTM D882)

90

200

240

140

150

65
Durometer Hardness

97D

80D

88D

78D

81D

79D

Water Absorption, %(24 hrs)

0.27 0.20 0.40 0.45 0.35 1.33
MEK Double Rubs (#) 66 12 >200 42 160 65
Tg(DMA) = 61°C; Peak tan delta; cured with 2 phr of Irgacure® 184
Adhesion Properties
Substrate I30 I50 TM50 TP50 H50 HE30
ABS XX XX XXX   XXX XXX
Aluminum            
Cold Rolled Steel X X     X  
Glass           X
HDPE            
PET X XX XXX XXX XXX XXX
PMMA            
Polycarbonate X X   XX XXX  
PVC XXX XXX XXX XXX XXX XXX
Stainless Steel            

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

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BR-742M Viscosity Reduction with Reactive Diluents

Safety & Health

Safety 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 irrit ation. Remove material from skin with soap and water. Never use organic solvents to remove material from skin and eyes.