Disodium phosphate (Na2HPO4), also known as DSP, is a versatile compound that finds various applications, including in polymers. Here are some potential uses of disodium phosphate in polymers:

Flame Retardancy

Disodium phosphate can act as a flame retardant in polymer formulations. It works by releasing water vapor when exposed to heat, which dilutes combustible gases and suppresses flame spread. Disodium phosphate is often used in combination with other flame retardants to enhance fire resistance in polymers.

Smoke Suppression

Similar to its flame-retardant properties, disodium phosphate can help reduce smoke emissions during combustion of polymers. By inhibiting the release of volatile components and promoting char formation, it contributes to lowering the amount of smoke generated, which is crucial for fire safety in many applications.

Antistatic Agent

Disodium phosphate can be used as an antistatic agent in polymers to reduce or eliminate static electricity buildup on the surface of the material. This property is particularly important in applications where static discharge can lead to hazards or interfere with the performance of electronic components.

Corrosion Inhibition

In certain polymer applications where metal components are present, disodium phosphate can act as a corrosion inhibitor. It forms a protective barrier on the metal surface, preventing corrosive substances from coming into contact with the metal and thus reducing the risk of corrosion.

Adhesion Promoter

Disodium phosphate can improve the adhesion between polymer substrates and various coatings or adhesives. By modifying the surface properties of the polymer, it enhances the bonding strength and durability of the adhesive joints or coated layers.