What Are the Applications of Silicone Sealant?

With the rapid development of the chemical industry, antibacterial silicone sealant has also continuously emerged as a challenging product in the industry. Silicone sealant can be said to be one of the most important raw materials used in construction and road construction processes. In road construction, it needs its weather resistance characteristics, long-term exposure to the sun also requires its anti-ultraviolet function, and it needs its high and low temperature resistance performance. Silicone sealant has been widely promoted and applied in the construction industry. Because of its excellent weather resistance and aging resistance capabilities, as well as ±50% deformation displacement resistance over a wide temperature range, elastic silicone sealant is widely used in the fields of construction, automotive, electronics and electrical engineering, and aviation.

Fire retardancy of silicone sealant

With the high-rise building of buildings, people have higher requirements for the safety of building materials. Therefore, the fire retardancy of multi-purpose silicone sealant has become a focus of attention. Although silicone gel has good high temperature resistance, it does not have fire retardancy per se and will continue to burn after ignition. Generally, a method of adding flame retardants to the formulation is used to improve the fire retardancy of silicone sealants. According to whether the flame retardant participates in the polymerization reaction in the base polymer, it is divided into additive type and reactive type. Additive flame retardants are widely used because they are easy to use and have significant effects.

Applications of silicone sealant

Silicone sealant has been widely promoted and applied in the construction industry. When using silicone sealant in road construction, construction must be carried out according to the requirements. First, the damaged road must be cut open with a cutting machine, and then the debris inside the groove should be cleaned with a wire brush to ensure that the inside of the groove is clean and free of foreign objects. After cleaning, continue to fill with backing tape to avoid fine stones falling into the groove at the end face, and then inject the silicone sealant into the deep gap at the end face. The injected amount of gel depth is generally about 7.1 cm, and the gel should not be less than 1 cm from the ground. In construction, the use of two-component ratios is more reasonable. The two sealants are mixed in the corresponding proportion, and then poured into the fine cracks of the road.

In construction, there are often problems such as long curing time, weak bonding strength, and uneven tearing time. Therefore, these phenomena must be operated in accordance with the construction process. The ratio in the construction process must also be reasonably configured according to the actual situation of the construction. This can ensure the rigor of the construction process and make the silicone sealant play the best role.

In addition, ships are in an extremely harsh marine atmospheric environment for a long time, and the application environment of ships has higher requirements for sealants, requiring sealants to have good water resistance, salt spray resistance, elasticity, and tensile strength, and also meet the process requirements for actual ship use. In response to the corrosion prevention requirements of general sealing environments on ships, a single-component neutral silicone sealant with simple operation has been developed. Due to the need for encapsulation in some construction sites to infuse sealants, it is required that the developed sealant has good fluidity and can quickly solidify at the deep level. Because single-component sealants have slow curing speeds and poor fluidity, it is difficult to meet the requirements of infusion construction, so the development of a two-component sealant is required based on the technology of single-component silicone sealant.