Used as a chain extender and crosslinking agent in the production of thermoplastic polyurethanes (TPUs), enhancing mechanical strength, elasticity, and thermal stability. Its hydroxyl groups react with isocyanate-terminated prepolymers to form urethane linkages, enabling precise control over polymer structure and performance. Commonly applied in high-performance elastomers for automotive parts, industrial coatings, and durable goods requiring resilience and resistance to abrasion and environmental degradation. Also utilized in specialty adhesives and sealants where strong bonding and flexibility are required.