Bomar Oligomers® BR-744SD

1 of 88 products in this brand
Bomar™ BR-744SD is a difunctional, aliphatic polyester urethane acrylate offering excellent adhesion, flexibility, and tensile strength. It can be effectively formulated for adhesion to steel, aluminum, and various plastics. Products formulated with BR-744SD can be highly flexible, elastomeric, and tacky. It is excellent as an adhesion promoter or reactive tackifier, and is a perfect choice for optically clear UV-PSAs.

Functions: Adhesion Promoter, Oligomer, Rheology Modifier, Tackifier

Chemical Family: Urethane Acrylate/Isocyanate

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Technologies

Features & Benefits

Product Highlights
  • Pressure Sensitive Adhesives
  • Excellent Adhesion to Various Substrates
  • Highly Elastomeric
  • Excellent Reactive Tackifier
  • Excellent Flexibility
  • Excellent Optical Clarity
  • Excellent Tensile Strength

Applications & Uses

Compatible Substrates & Surfaces
Adhesive & Sealant Type
Recommended Application
  • Pressure Sensitive Adhesives
  • Metal and Plastic Coatings
  • Electronics
  • Inks

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (60 °C)7,000cP
Pt-Co Color (APHA)35
Pt-Co Color35APHA
Refractive Index (25°C)1.474
Density (25°C)1.11g/cm3

Technical Details & Test Data

Typical Formulations
Test Formulation Name I30 I50 TP50 TM50 H50 HE30

BR-744SD

70 50 50 50 50 70
IBOA 30 50        
TMPTA       50    
TPGDA     50      
HDDA         50  
HEMA           50
Omnirad™ 481 2 2 2 2 2 2
Viscosity, 25°C (CAP2000+)

8.250

1.300 1.500 7.000 700 600

 

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

1.430

3.510

2.610

3.780

2.550

1.720
Elongation (%, ASTM D882) 321 355 27 5.4 12 253
Elastic Modulus (ksi, ASTM D882)

0.45

1.42

16.8

88.4

35.6

0.86
Durometer Hardness

65A

48D

55D

80D

61D

82A

Water Absorption, %(24 hrs)

0.51 0.31 0.73 0.64 0.55 4.66
MEK Double Rubs (#) 37 28 62 >200 40 30
Tg(DMA) = -9°C; Peak tan delta; cured with 2 phr of Irgacure® 184
Adhesion Properties
Substrate I30 I50 TP50 TM50 H50 HE30
Aluminum X XXX       XX
Cold Rolled Steel XX XXX     X XX
Glass X XXX X     X
HDPE            
Polycarbonate XXX XXX XXX XXX XXX X
PET X X       X
PMMA XX XXX XX   XX X
Stainless Steel XX XXX       XX

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

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BR-744SD 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.