Special Report on Sealant in the Building Materials Industry: The Flower World of Universal Adhesive

Organosilicon performance disassembly: excellent weather resistance and aging resistance.

Sealant refers to a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is used to fill the structural gap and play a sealing role. There are many types and models of sealant products, which can be divided into silicone polymer, rubber, acrylic acid, polyurethane, polysulfide, etc. based on their main component polymer category.

Organosilicon, also known as organosilicon compounds, refers to compounds that contain Si-C bonds and have at least one organic group directly connected to silicon atoms. Traditionally, compounds that connect organic groups to silicon atoms through oxygen, sulfur, nitrogen, etc. are also considered organosilicon compounds. Among them, polysiloxanes composed of silicon oxygen bonds (Si-O-Si -) as the backbone are the highest proportion and most widely used category of organic silicon compounds, accounting for over 90% of the total dosage. The basic structural unit of organic silicon products is composed of silicon oxygen links, and the side chains are connected to various other organic groups through silicon atoms.

Compared to other materials, the key properties of silicone products include temperature resistance and a wide range of usage temperatures. The main chain structure of organic silicon products is silicon oxygen bond, the silicon oxygen bond energy is 121 kcal/mole, and the carbon carbon bond energy is 82.6 kcal/mole. Therefore, organic silicon products have high thermal stability, and the molecular chemical bond does not break or decompose at high temperatures. In addition, silicone is resistant to low temperatures and has a wider temperature range than other materials. Excellent weather resistance and long service life. Ozone in the atmosphere has a strong destructive effect on polymer materials, causing them to undergo oxidative degradation, thereby losing their usefulness, especially for rubber materials containing double bonds. The main chain structure of organic silicon products is a silicon oxygen bond, with no double bonds present, making it difficult to be decomposed by ultraviolet light and ozone. Its service life in natural environments can reach several decades. Electrical insulation performance: the dielectric loss, voltage withstand, surface resistance coefficient and other properties of silicone products are superior to most insulation materials, and can be used as stable electrical insulation materials in the electronic and electrical industry. Physiological inertness: Polysiloxane compounds are one of the most inactive compounds known and have no rejection reactions with animal bodies. Silicone rubber is used in fields such as breast implants, artificial nose bridges, and contact lenses.

Silicone sealant has excellent weather resistance and anti-aging performance. It has obvious advantages in the field of long service life and long exposure to outdoor environment, such as typical curtain wall, photovoltaic and other scenarios.

Qingdao Rolande Silicone Sealant