Bomar Specialties Company UV/EB Curing Advanced Performance Oligomers

BR-400 Series Oligomers - Difunctional & Trifunctional Polyester Urethane Acrylates

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BR-400
Series Oligomers

Difunctional and trifunctional polyester urethane acrylates
The aliphatic oligomers cure rapidly to tough, non-yellowing films with good adhesion to a variety of
substrates. The aromatic oligomers provide similar physical properties to that of the aliphatics, but are not
recommended for applications where a non-yellowing film is critical. Coatings exhibit excellent oil and
chemical resistance.

Difunctional Polyester Urethane Acrylate Oligomers

OLIGOMER PROPERTIES

FORMULATED PROPERTIES IN 30% IBOA
2% Omnirad 481

f

Oligomer
Type

M_W

Neat
Oligomer Viscosity

T_g*
(°C)

Viscosity
cP @ 25°C

Tensile
Strength, psi

Elong. %
at break

Durometer
(hardness)

2

Aliphatic

Low

75,000 cP
@ 50°C

71

16600

6900

10

87D

2

Aliphatic

Low

150,000 cP
@ 50°C

62

25200

6900

12

88D

f = (meth)acrylate functionality
*Glass transition temperature measured by DMA, peak tan delta.

MOLECULAR WEIGHT

LOW:  less than 2000 glmol
MED:  2000-4000 glmol
HIGH:  greater than 4000 glmol

Download the 2010 UV/EB Oligomer Product Guide.
This guide features property tables to assist formulators in oligomer selection.

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