Application of Polyurea Materials

What are the applications of polyurea materials? With the rapid development of the construction industry, existing building waterproofing materials can no longer meet the needs of modernization. In order to better meet the functional, energy-saving and environmental protection needs of modern buildings, a new type of waterproofing material should be developed. The emergence of polyurea materials has brought new impetus to the field of building waterproofing.

Building waterproofing: Currently, the main waterproofing coatings on the market are polyurethane and water-based acrylic acid. The water-based acrylic coating has good weather resistance, while the polyurethane waterproof coating has bright colors and good waterproof performance.

Spraying polyurethane and polyurea materials are different, with good flexibility, aging resistance, and high strength. Even in the case of concrete cracking, they not only do not break themselves, but also tightly grasp the concrete to play a waterproof and protective role, especially suitable for building roof waterproofing treatment. Using specialized equipment for spraying and film forming process, polyurethane and polyurea materials have good waterproof structure integrity and no joints, avoiding potential leakage caused by coil joints, and the construction efficiency is extremely high. In addition, this technology is currently in production and does not use solvents or release toxic and harmful substances during construction and use, which is beneficial for environmental protection. Spraying polyurethane polyurea material is not sensitive to environmental temperature and humidity, making it suitable for both the cold north of China and the humid and rainy south.

The waterproof and insulation composite system, sprayed with polyurethane hard foam as a roof waterproof and insulation material, has a history of 10 years in China. It has excellent insulation performance, and also has characteristics such as small bulk density, sound insulation, chemical corrosion resistance, temperature resistance, fire resistance, and impermeability. It is a good material that integrates waterproof and insulation.

At present, the commonly used protective layers in China include cement mortar (polymer mortar) and acrylic coatings with good weather resistance. However, after the cement mortar is applied on the surface of the insulation layer, the moisture in the mortar will penetrate into the opening holes of polyurethane foam, seriously affecting its insulation effect. It is also easy to fall during wall construction. Acrylic coatings are non-toxic, odorless, and easy to clean. They can be made into various colors, but their disadvantages are non wear resistance, insufficient low-temperature toughness, and no certain thickness. Sprayed polyurethane polyurea material elastomer protective layer, convenient and fast construction, with excellent comprehensive performance. It can not only be used for people's roofs, but also for insulation and waterproofing of external walls, and can also play a decorative role. It is one of the ideal waterproof and insulation materials. This material has been applied in cold storage construction in China for many years. In addition, in recent years, foreign countries have applied it to the exterior wall structures of large public buildings. A composite waterproof and insulation system using sprayed polyurethane polyurea material and polystyrene insulation board.

Tunnel waterproofing. One of the waterproofing methods for tunnels is to construct a flexible waterproof layer outside the concrete immersed tube. Compared with traditional waterproof coatings and rubber sheets (polymer sheets), spray polyurethane polyurea materials are more suitable for use in difficult projects such as tunnels, providing convenient and reliable waterproof technology for new tunnels. The tunnel wall is made of concrete on rocks. Due to leakage, the foundation structure gradually ages, electrical leakage, susceptibility to short circuits and long-term corrosion, and may even lead to the risk of rock sliding. After construction, the polyurea material has good elasticity and the concrete joints are not prone to leakage.