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Bomar Oligomers® BR-744BT

1 of 88 products in this brand
Bomar® BR-744BT is an aliphatic difunctional polyester urethane acrylate offering excellent adhesion, and flexibility. While not limited to the applications, BR-744BT is an effective choice in optical coating for plastics and UV pressure-sensitive adhesives. Provides solvent resistance, is durable, and has high gloss in ink and coating applications. This material has low skin sensitivity for dental and cosmetic applications, and is INCI listed.

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
  • Provides Weather Resistance
  • Enhances Flexibility
  • Gloss Finish
  • Provides Impact Resistance
  • Low Skin Irritation
  • Non-Yellowing
  • Low MEHQ Levels
     

Applications & Uses

Compatible Substrates & Surfaces
Recommended Application
  • Nail Gel Coating
  • Vacuum Metalized Coatings
  • Plastic Coatings
  • Elastomers
  • UV Pressure-Sensitive Adhesives (PSAs)

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (60 °C)44,500cP
Pt-Co Color (APHA)max. 100
Pt-Co Colormax. 100APHA
Refractive Index (25°C)1.484
Density (25°C)1.03g/cm3

Technical Details & Test Data

Typical Formulations

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

Cold Rolled Steel

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

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* 23,000 2,800 16,000 2,700 1,200 7,500

* Brookfield – CAP 2000+ @ 25°C.

Cured Mechanical Properties
Property I30 I50 TM50 TP50 H50 HE30

Tensile Strength, psi**

1,000 2 2,600 1,100 1,600 600
Elongation, 6** 160 170 | 3 12 6 120

Elastic Modulus, ksi*

24 45 110 25 45 27

Durometer Hardness

75A 58D 81D 59D 65D 55A

Water Absorption, 96 (24 hrs)

0.44 0.37 1 0.69 0.52 4

MEK Double Rubs (#)

>200 56 >200 49 68 89
Tg(DMA)= 8°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

Bomar Oligomers® BR-744BT - 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.