company tower banner
Bomar Specialties LLC Company Logo

Bomar Oligomers® BR-3641AJ

1 of 88 products in this brand
BOMART BR-3641AJ is an aliphatic polyether urethane acrylate with a high molecular weight and theoretical 1.3 functionality. Films formulated with BR-3641AJ are highly flexible, elastomeric, and tacky. It is excellent as an adhesion promoter or reactive tackifier. It is a perfect choice for optically clear UV-PSAs.

Functions: Adhesion Promoter, Oligomer, Tackifier

Chemical Family: Urethane Acrylate/Isocyanate

Technical Data Sheet
  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Product Highlights
  • Optical Clarity
  • Exhibits Hydrolytic Stability
  • Resilience
  • Tenacious Adhesion
  • Enhances Weatherability
  • Non-Yellowing

Applications & Uses

Adhesive & Sealant Type
Recommended Applications
  • Pressure Sensitive Adhesives
  • Adhesion Promoter
  • Reactive Tackifier

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Density (25 °C)1.06g/cm3
Pt-Co(APHA) Colormax. 100
Refractive Index (22°C)1.46
Viscosity (60 °C)10000cP

Technical Details & Test Data

Typical Formulations

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

Cold Rolled Steel

  X        
Glass   X        
HDPE            
PET   X        
PMMA     X      
Polycarbonate            
Polypropylene            
PVC   X        
Stainless Steel   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* 9,500 1,900 8,400 2,300 1,300 7,000

* Brookfield – CAP 2000+ @ 25°C.

Cured Mechanical Properties
Property I30 I50 TM50 TP50 H50 HE30

Tensile Strength, psi**

50 600 1,000 600 700 X
Elongation, 6** 400 500 22 14 6 X

Elastic Modulus, ksi*

0.03 5 50 15 20 X

Durometer Hardness

17A 62A 56D 27D 41D 13A

Water Absorption, 96 (24 hrs)

1.25 0.81 1.70 1.49 1.28 7.45

MEK Double Rubs (#)

9 8 5 2 15 20
Tg(DMA)=-36°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-3641AJ - 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.