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SAFOAM® is an endothermic chemical nucleating and blowing agent for the creation of a fine foam structure in thermoplastic injection molding and extrusion applications. SAFOAM® Masterbatches for condensation polymers contain SAFOAM® powder and a special surfactant package based on a styrenic resin and an EEA, designed for high temperature processing which improves melt tension and melt flow. It is commonly used in injection molding for the elimination of sink marks, reduction or part warpage, and for minor weight reduction. In extrusion operations, it is used for the creation of fine size cells in direct gas applications. All SAFOAM® powders are made with special surfactants, which result in:

• Improved bubble stability
• Slowed moisture absorption and diffusion rate
• Extended CO₂ shelf life
• Excellent dispersion

Condensation Polymers are defined by others as polymerization by a repeated condensation process with elimination of simple molecules. The products of condensation polymerization reactions are condensation polymers. If a plastic is formed, the process is called polycondensation. Just as esters and amides are products of simple condensation reactions of monofunctional reactants, so polyesters and polyamides are the products of condensation polymerization of difunctional acids with difunctional alcohol or amines. Water is frequently the small molecule split off during condensation. Other common by-products of polymerization based on plastic are ammonia, hydrogen chloride, carbon dioxide, sodium bromide, nitrogen, and methanol.