| Loss of adhesive properties and color formation are important
parameters to be measured after film aging
Films obtained from the following formulation, 100 parts
NR, 80 parts rosin ester and 1000 parts toluene, are aged at 70°C
for several days. As seen from the figures below, Irganox®
1726 exhibits better tack retention (Figure 1) and improved color
retention (Figure 2) than antioxidant systems based on bisphenols such
as AO 2246.
Figure 1: Loop Tack (PSTC-5) of NR solvent-based
Adhesive After Film Aging at 70°C
Adhesive films (-35 Nm) coated on polyester foils are
aged covered with silicon paper. All values are averages of 3 replicates
(± 10% relative).
Figure 2: Yellowness Index of NR Solvent-based
Adhesive After Film Aging at 70°C
To get expert advice on NR solvent-based adhesive stabilization,
use TechDirect.
| 
