Polyurea elastomer is a kind of polymer with urea based repeating structural unit, which is formed by the reaction of isocyanate, amino polyether and amino chain extender. In foreign countries, spray polyurea materials are called liquid waterproof coiled materials that can be constructed at room temperature. The material has 100% solid content, fast curing speed, insensitivity to temperature/humidity, and high physical strength. Therefore, since its birth in 1985, it has obtained huge commercial applications in the field of waterproofing. At the end of the 20th century, China also began to apply this product to all kinds of floor, building waterproofing, subway station waterproofing and other projects.

Advantages of spray polyurea material applied in waterproof engineering

Spray polyurea material is a new type of solvent-free and pollution-free green construction technology developed to meet the needs of environmental protection after the low (non) pollution coating technologies such as high solid coating, water-based coating, radiation curing coating, powder coating, etc. in recent 10 years abroad.

Spray polyurea material is called liquid waterproof roll material abroad. Compared with traditional waterproof materials, it has the following advantages:

1. 100% of the same landscape, no volatile organic compounds, in line with environmental requirements;

2. No catalyst, fast curing, spray molding on curved surface, inclined surface and vertical surface, no sagging, strong retention for concave convex, corners and corners;

3. The fast but controllable assimilation speed ensures that the T-journey can be put back into use quickly:

4. It is not sensitive to water and moisture, and the construction is not affected by environmental humidity and temperature;

5. It can be sprayed or poured, and the thickness of one construction can be from hundreds of microns to several centimeters, which overcomes many inconveniences of previous construction and shortens the construction period;

6. Excellent physical properties, such as tensile strength, tear strength, elongation, wear resistance, puncture resistance, puncture resistance, moisture resistance, etc. The high elongation makes it have a strong crack bridging ability and excellent protection against concrete cracking;

7. Excellent anti-corrosion performance, resistant to long-term immersion in most corrosive media, such as acid, alkali, salt, seawater, chloride ion, etc;

8. The whole is seamless, dense and tough, which can be used for water proofing on the upstream or on the downstream:

9. It has high and lasting adhesion to various substrates, and will not fall off due to alternating cold and hot.

American PDA Association once made a survey. 60% of the spray polyurea materials were used in the seven protection of coagulation, and 5% were used in the roof waterproof engineering. Most of the applications in concrete protection projects are concrete plus waterproofing, including highway waterproofing, tunnel waterproofing, building waterproofing, water storage tank applications, etc., as well as waterproofing applications of some concrete substrates containing corrosive media, such as wastewater treatment pools, etc.

Due to its excellent elasticity, polyurea is very suitable as a protective material for substrates such as concrete. Because concrete materials are prone to brittle cracking, polyurea has very good crack extension. Once an experiment was conducted to test its extensibility. The concrete sample coated with SPUA material fell freely from a height of 1.8m, and the concrete itself was cracked, but the SPUA material was not damaged, and the concrete fragments were firmly gathered together. Due to the excellent flexibility and mechanical strength of SPUA material, even in the case of concrete cracking, the polyurea material will not break itself, but also can tightly "grasp" the concrete material, playing a waterproof and protective role.

Guangzhou Tuoshen Surface Treatment Co., Ltd., the spraying manufacturer, is preferred for purchasing spraying, Spray processing Factory, trustworthy