Polyurethane elastomer as roller, conveyor belt, hose, automotive parts, sole, synthetic leather, wire and cable and medical artificial organs, etc.; soft foam for vehicles, bedroom, garment liner, hard foam used as heat insulation, sound-absorbing, packaging, and synthesis of low foamed wood, insulation, coatings for advanced vehicles, furniture, wood and metal door and pond dams and construction anti seepage materials, fabric and coating. Adhesive on metal, glass, ceramics, leather, fiber and so on have a good adhesion. In addition, the polyurethane can also be made into emulsion, magnetic materials, etc..