Bomar Oligomers® BR-541S

1 of 88 products in this brand
Bomar™ BR-541S a difunctional, polyether urethane acrylate that is used for its desirable balance of toughness and flexibility. It adheres readily to a variety of substrates including cold rolled steel, glass, PC, and stainless steel. It is an excellent choice for impact-resistant coatings. BR-541S is desirable for use in cosmetic applications where color stability and optically clear tough coatings are needed.

Chemical Family: Urethane Acrylate/Isocyanate

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies

Features & Benefits

Product Highlights
  • Color Stable
  • Gloss Finish
  • Optically Clear
  • Weatherability
  • Fast Cure Rates
  • Improves Adhesion

Applications & Uses

Compatible Substrates & Surfaces
Recommended Application
  • Hard Glossy Coatings
  • Scratch-Resistant Coatings
  • Inks
  • OPV

Properties

Uncured Properties
ValueUnitsTest Method / Conditions
Viscosity (60 °C)3,000cP
Pt-Co Color (APHA)max. 50
Pt-Co Colormax. 50APHA
Refractive Index (25°C)1.49
Gardner Colormax. 50
Density (25°C)1.06g/cm3

Technical Details & Test Data

Typical Formulations
Test Formulation Name I30 I50 TP50 TM50 H50 HE30

BR-541S

70 50 50 50 50 70
IBOA 30 50        
TMPA       50    
TPGDA     50      
HDDA         50  
HEMA           30

Omnirad® 481

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

3.800

600 2,600 600 230 1.300

 

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

3.100

3.400

3.500

5.200

3.850

2.800
Elongation (%, ASTM D882) 120 80 17 4 9 140
Elastic Modulus (ksi, ASTM D882)

7

70

50

150

75

4
Durometer Hardness

62D

77D

75D

87D

76D

35D

Water Absorption, %(24 hrs)

0.52 0.32 0.66 0.48 0.48 2.67
MEK Double Rubs (#) 18 9 21 >200 40

6

Tg(DMA) =44°C; Peak tan delta; cured with 2 phr of Omnirad® 184
Adhesion Properties
Substrate I30 I50 TP50 TM50 H50 HE30
Aluminum   X        
Cold Rolled Steel XX XXX   X XXX XXX
Glass   XXX       XXX
HDPE            
Polycarbonate X XXX   XX XXX X
PET X X   XX X XX
Stainless Steel XX XXX       XXX

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

Viscosity Reduction with Reactive Diluents

Dymax Corporation Bomar BR-541S Viscosity Reduction with Reactive Diluents