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.

Hot-melt Applications

Hot melt adhesives and the components used in their manufacture are generally solid or highly viscous at room temperature. As a result, hot melt adhesives are exposed to elevated temperatures, which are required to melt the components, during both formulation and end use. When exposed to elevated temperatures the hot melt adhesives become susceptible to thermo-oxidative degradation.

 Signs of adhesives degradation during  formulation and processing include:  Signs of degradation during end use  include:
  • Skinning
  • Viscosity changes
  • Discoloration
  • Char Formation
  • Loss of adhesion
  • Loss of cohesive strength
  • Loss of peel strength, etc.
  • Discoloration

Antioxidants play a key role in the following hot-melt systems.
Recent developments in the bulk delivery and storage of hot melt adhesives have allowed manufacturers and their customers to increase productivity, reduce costs and decrease waste. To make this possible, the adhesive is stored and kept at elevated temperatures of greater than 100°C. Chemical market offers a wide range of stabilizers and stabilizer systems to ensure that the quality and performance of the adhesive is protected during shipment, through storage and use.

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