The Universal Selection Source: Adhesives Ingredients

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.

Polyolefins

APAO polymers are used as a base for the manufacture of a wide variety of hot melt adhesive and sealant systems. Because APAO is compatible with many solvents, tackifiers, waxes, and other polymers, it is well suited for many adhesive applications in the packaging, construction, medical, and personal care industry. As an example, APAO hot melt adhesives are widely used for hygienic applications in the adhesive industry such as disposable diapers.

Similar to styrene-isoprene systems, APAO polymers degrade via chain scission during high temperature aging. The appropriate choice of antioxidant or antioxidant system can prevent the effects of degradation such as color formation and most importantly, viscosity decrease. (Figures 1-4) Phenolic antioxidants provide very good viscosity control, but use of co-stabilizers such as phosphites can provide some additional improvements with regard to color, while still maintaining good viscosity control.

Dynamic Aging at High Temperatures

  

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