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Bomar Oligomers® BR-3741AJ

1 of 88 products in this brand
Bomar BR-3741AJ is an aliphatic 1.3 acrylate functional polyether urethane. The extremely elongative nature of BR-3741AJ makes it an excellent candidate for consideration in UV light-curable PSAs as a reactive tackifier. It is also used as a co-oligomer for adhesion promotion in coatings. Films formulated with BR-3741AJ are highly flexible, elastomeric, and tacky. This oligomer is an excellent adhesion promoter, and compared to other reactive tackifiers it results in relatively tougher films. It is a perfect choice for optically clear UV pressure-sensitive adhesives (PSAs).

Functions: Adhesion Promoter, Oligomer, Tackifier

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
  • Enhances Flexibility
  • Non-Yellowing
  • Optically Clear
  • Oil & Chemical Resistant
  • Provides Softness
  • Adheres to a Wide Range of Substrates
  • Exhibits Hydrolytic Stability

Applications & Uses

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

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Density (25 °C)1.01g/cm3
Pt-Co(APHA) Colormax. 75
Refractive Index (25°C)1.459
Viscosity (60 °C)25000cP

Regulatory & Compliance

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.

Technical Details & Test Data

Typical Formulations

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

Cold Rolled Steel

X XXX   X X -
Glass X X       -
HDPE           -
PET XX XXX       -
PMMA X XX XXX X X -
Polycarbonate X XX X X XX -
Polypropylene X XXX       -
PVC X XXX XX X X -
Stainless Steel X XXX   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* 20,000 3,500 16,000 4,200 2,300 14,000

* Brookfield – CAP 2000+ @ 25°C.

Cured Mechanical Properties
Property I30 I50 TM50 TP50 H50 HE30

Tensile Strength, psi**

55 700 1,300 700 1,000
Elongation, 6** 300 900 4 20 13

Elastic Modulus, ksi*

0.05 6 40 10 15

Durometer Hardness

20A 26D 63D 38D 41D

Water Absorption, 96 (24 hrs)

1.18 0.77 1.57 1.38 1.19

MEK Double Rubs (#)

100 54.00 >200 32 8

Tg(DMA)=-49°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-3741AJ - Viscosity Reduction With Reactive Diluents