Polyurethane is mainly used as polyurethane synthetic leather, polyurethane foam, polyurethane coating, polyurethane adhesive, polyurethane rubber (elastomer) and polyurethane fiber. In addition, polyurethane is also used in civil engineering, address drilling, mining and petroleum engineering to stop water and stabilize buildings or subgrade; As a pavement material, it is used in the runways of sports fields, indoor floors of buildings and so on.
Extended data:
MDI and TDI are abbreviations because their names are long and generally difficult to remember. MDI and TDI are substitutes for each other, and they are both raw materials for producing polyurethane. The toxicity of MDI is lower than that of TDI, but the density of foam is higher than that of TDI system, and the polyurethane products formed by MDI have relatively good moldability.
Polymerized MDI is mainly used in polyurethane rigid foam and semi-rigid foam, and is used in thermal insulation materials, auto parts and construction industries. However, TDI is mainly used in polyurethane soft foam, furniture padding, sound-absorbing materials and toys. At the same time, due to its toxicity, its application is limited to a certain extent, far less extensive than MDI. At present, MDI, as one of the basic raw materials of polyurethane, has no ideal substitute.
Baidu encyclopedia-polyurethane
Baidu encyclopedia -TDI
Baidu encyclopedia -MDI