Polyurea - what is it? Waterproofing by polyurea

Sealant coatings and construction elements long been divided into two categories: natural and synthetic materials. Oddly enough, in our days there is still a place for natural raw materials, which performs better than artificial materials. But among the synthetic substitutes of traditional materials there are many decent options. In this series is and polyurea. What it is and why it is needed – these issues are no longer relevant for professional builders, but the simple man in the street is to understand them more. Due to the unique qualities of this synthetic material allows you to perform high-quality insulation, replacing most familiar of this group of funds.

General information about polyurea

In the case of synthetic polymers, and the structure resembles polyurethanes, which are synthesized by copolymerization diisocyanates. In fact, joining the group of elastomers and identified the qualities possessed by the polyurea. What it is from the point of view of practical application? First, the material capable of forming hard and durable coating. The reaction rate of rejection is quite high, but for the manufacture of molding products may require additional technological adjustments.

Another feature of the synthetic material due to the high nucleophilicity of amines. This means that the structure of finished products has smaller sensitivity to moisture. This characteristic and the identified one of the main tasks which have a coating of polyurea in the construction – waterproofing.

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Varieties of polyurea

We Can say that the whole group of synthetic polymers are interrelated, and in some sense there may be modifications of each other. However, polyurea there are two fundamentally different species: it is aliphatic and aromatic compounds. The first option is interesting because it can be used to form a UV-resistant coating. That is, the processing of the polyurea in the form of the coating is not deformed and does not lose its color under the action of sunlight.

The Second variety – aromatic polyurea, which can be regarded as a universal material. So, if aliphatic coating it is more suitable to ensure the protection of the roof, then this option is ideal for waterproofing of the Foundation, and as a means of treatment of decorative surfaces indoors. In addition, waterproofing by polyurea is used today for production equipment, vehicles, and also in creating lasting protective barriers for hydraulic stations and structures.

One-component and two-component

To understand this division should refer to the principles of the reaction of polyurea. Standard material is a two-component, which operates under the influence of a catalyst. That is, the solidification process occurs by means of auxiliary component. Now let's turn to the question of what constitutes a single component polyurea. What it is in the process of forming waterproofing coatings? It is convenient in application material that does not require reaction of the catalyst, that is, crystallization is carried out independently, allowing manual processing.

It would Seem that the ease of application should nominate one-component compositions of the first, pushing the more demanding two-component analogue. However, in terms of strength, the situation is changing in the opposite direction. One-component compounds are useful to use as secondary protection, but for handling critical sections should use conventional polyurea. Your hands can be applied and a two-component composition, the main thing - to use special equipment for this purpose.

Technology waterproofing urea

There are several areas in which to apply the waterproofing of this type. This treatment pool surface, sealing the foundations and protection against water roofing. In most cases, the coating is applied in a thin layer by the method of spraying. Differences in approaches may be due to requirements to cover loads, external influences, and the degree of adhesion, etc. Again, waterproofing the polyurea may be performed using one or two component compositions. Work with facilities, such as foundations and the roof structure, it is desirable to use the second type because to the fore the characteristics of durability. Less resistant to physical influences waterproofing can be used as a subsidiary protective coating.

Manual processing

As already mentioned, for independent processing of more suitable one-component composition. Before apply, dilute the polyurea water. However, the dilution must be done only under condition of reduction of viscosity. In other cases, it is sufficient to stir the solution to obtain a uniformity of shade. In most casespolyurea manual application do not require the use of special tools or other ancillary components. It is enough to apply with a roller or brush. But in working with metal surfaces, it is advisable to use a primer. It is also used in the treatment of glass surfaces. After completion of waterproofing, you should wait one day to cover gained enough firmness.

Special equipment

Professional builders for cooking and spray polyurea coatings using a special equipment. In particular for these needs offered units for spraying of seamless insulation coatings. Typically, this apparatus operating under high pressure and is able to store dozens of recipes for mixtures of polyurea. In the latest models of equipment for application of polyurea is supplied by the functional modules for analysis of the treated surface level indicators of the working mixture, flow meters and other devices that improve the ergonomics of the machines.

Other applications

The Combination of hardness and resistance to moisture caused widespread polyurea. Of course, first and foremost, it is used in construction and finishing works. But the advantages of the material assessed and shipbuilding companies, repair shops, service businesses that are engaged in technical support of various structures, bridges and tanks. There are benefits from this material as insulator. To understand this property, it is worth remembering the answer to the question, polyurea – what it is. It is primarily the quick-setting polymer, which provides effective sealing and durability. That is, if processing the surface of the finishing layer, the bridges and you can forget all.

Conclusion

Like all modern high-tech materials, polyurea ahead of competing means of isolation for the price. It is an expensive material, but the result is worthy. Another thing is that for private purposes should be used polyurea applied by hand, as the acquisition of expensive equipment will make inappropriate use of this technology. Conversely, in the case of large-scale insulating measures no special napulitana not do. Metering tools provide uniform coverage and will save on consumption. Also note that manufacturers of polyurea are different, respectively, and the performance of a particular brand may vary.