Projected polyurethane is a plastic material with a cellular composition used as a thermal and acoustic insulator and as a waterproofing agent in both buildings and industry.[1] It is also known by the name polyurethane foam.

The discovery of polyurethane dates back to 1937, thanks to the research carried out by Otto Bayer. It began to be used in the 1950s, since until then there were no machines capable of processing it.

The mixture of the two components polyol and isocyanate, liquid at room temperature, produces an exothermic chemical reaction. This chemical reaction is characterized by the formation of bonds between the polyol and the isocyanate, achieving a solid, uniform and very resistant structure. If the heat given off by the reaction is used to evaporate a swelling agent, a rigid product is obtained that has a cellular structure, with a volume much larger than that occupied by the liquid products. This is what we call rigid polyurethane foam, or PUR.

Rigid polyurethane foam is a duroplastic synthetic material, highly spatially cross-linked and non-fusible. At the usual densities, for thermal insulation, the foam contains only a small part of solid matter (with a density of 35 kg/m³, only 3% of the volume is solid matter).

Rigid polyurethane foam applied in situ by spraying, or sprayed polyurethane, is obtained by simultaneous spraying of the two components on a surface called substrate.

Thermal insulation.

Acoustic conditioner.

Waterproofing of facades.

Humidity control.

Fire safety.

Healthiness.

Sustainability.

Mechanical resistance.

Chemical stability.

Adherence.

Putting into work.

Standardization.

Certification.

Facade with interior insulation and wet partitions.

Facade with interior insulation and dry partitions.

Façade with exterior insulation and continuous coating.

Ventilated facade.

Façade with injection chamber.

Passable flat roof.

Flat roof not passable.

Inclined roof.

Insulated cover between pigeon walls.

Lightweight cover insulated on the inside.

Lightweight cover insulated on the outside.

Ceiling.

Floor.