Polyurethane elastomer has the characteristics of high elasticity (high elongation at room temperature) of rubber.
Polyurethane elastomer is also called polyurethane rubber and belongs to special synthetic rubber. It can be considered that "polyurethane elastomer" and "polyurethane rubber" are synonyms, and the rubber industry is more Agree with the latter, while the polyurethane industry generally agrees with the former.
Some of the polyurethane elastomers developed in the early stages were prepared by the mixing process of natural rubber, and the resulting product was mixed polyurethane (MPU).
Some people call cast polyurethane "liquid rubber" because cast polyurethane is prepared by reacting liquid as raw material. This term was once popular in academic and application fields using hydroxyl-terminated polybutadiene and isocyanate as raw material systems.
The mixing process of natural rubber requires the use of other cross-linking curing aids such as sulfur and peroxide. These aids are called "vulcanizing agents". Therefore, some people also refer to chain extenders and cross-linking agents used in synthetic polyurethane elastomers. (curing agent) is called vulcanizing agent.