Poly(propylene glycol) bis(2-aminopropyl ether) is widely used as a curing agent in epoxy resin systems. It enhances flexibility and impact resistance in cured epoxy products, making it suitable for coatings, adhesives, and composites. Its amine groups react with epoxy resins, forming strong, durable networks.

It is also employed in polyurethane synthesis, where it acts as a chain extender or crosslinker, improving the mechanical properties of polyurethane foams and elastomers. Additionally, it is utilized in the production of sealants and encapsulants, providing excellent adhesion and weather resistance.

In the pharmaceutical and personal care industries, it serves as a precursor for synthesizing surfactants and emulsifiers, contributing to the stability and texture of formulations. Its biocompatibility and low toxicity make it suitable for medical applications, such as drug delivery systems and biomedical coatings.

Overall, its versatility and functional properties make it a valuable component in industrial, commercial, and scientific applications.