The polyurethane was created in the 1930s, although it did not begin to be applied until the appropriate machinery was developed in the 1950s. It is a product that uses two basic raw materials: petroleum and sugar. After undergoing a chemical transformation process, these raw materials give rise to two other basic compounds that are liquid at room temperature: polyol and isocyanate. The mixture and agitation of both in certain proportions and together with other additives produces a chemical reaction, the result of which is a very versatile material, which can have multiple properties: rigid, flexible, solid, porous, etc.

One of these reactive formulas gives rise to the foam stiffened from polyurethane (PUR), which is used in the construction sector. Its properties are due to two phenomena that take place during the reaction: the formation of bonds between the polyol and the isocyanate, which gives the product strength; and the heat given off by the reaction, which is used to evaporate a blowing agent, which gives the compound a large volume and insulating capacity.

The foam stiffened from polyurethane (PUR) The foam stiffened from polyurethane can be applied in two different ways:

Screening

Simultaneous spraying of the two components on a surface. It is usually used for new construction.

Injection

The components are mixed and introduced into a cavity, where they expand. It is commonly used in housing renovation works and also in the construction of new buildings. Industry.