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Antioxidants for Adhesives

Adhesives and their raw materials react like other organic materials with oxygen in a process called autoxidation. This guide offers you an extended overview of Antioxidants in the adhesives & sealant industry. You will be able to select the antioxidant you need from the different antioxidant families mentioned here. This guide will also take a look into antioxidant benefits and applications. You can also check how to test and determine the efficiency of the antioxidant(s) you have selected.

Natural Rubber based Adhesives

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. In figures below you can seee, better tack retention (Figure 1) and improved color retention (Figure 2).

Loop Tack (PSTC-5) of NR solvent-based Adhesive After Film Aging at 70°C
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).

Yellowness Index of NR Solvent-based Adhesive After Film Aging at 70°C
Figure 2 : Yellowness Index of NR Solvent-based Adhesive After Film Aging at 70°C

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