Poly(propylene glycol) bis(2-aminopropyl ether) is widely used as a curing agent in the production of epoxy resins. Its amine functional groups react with epoxy groups to form a cross-linked polymer network, enhancing the mechanical strength, chemical resistance, and thermal stability of the final product. This makes it valuable in coatings, adhesives, and composite materials for industries such as automotive, aerospace, and construction.

It also serves as a chain extender in polyurethane synthesis, improving flexibility and durability in elastomers, foams, and sealants. Additionally, its amphiphilic nature allows it to act as a surfactant or emulsifier in certain formulations, aiding in the stabilization of mixtures in industrial and personal care applications.

In biomedical applications, it is utilized in the development of hydrogels and drug delivery systems due to its biocompatibility and tunable properties. Its versatility and performance-enhancing characteristics make it a key component in various advanced material technologies.