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Fire Proof Seal Bonding Properties And Aging Resistance

May 26, 2017

Fire Proof Seal Silicone sealant is a kind of room temperature vulcanized silicone rubber, which is made of terminal hydroxyl polydimethylsiloxane as the main raw material, has excellent anti-aging and mechanical properties, and has good for most building materials Of the bonding performance, in the national economy, especially in the construction of curtain wall has a wide range of applications. With the development of high-rise curtain wall, the function of the sealant is not only limited to excellent bonding performance and aging resistance. Several major fires occurred, so that high-rise building fire safety has become a hot topic of focus and research in various fields.

Fire Proof Seal Ordinary silicone sealant as the main raw material 107 base rubber in the 200-300 degrees Celsius can burn, from a certain point of view are combustible items, and later the major manufacturers have introduced flame retardant sealant to solve the ordinary silicone sealant burning Problem, flame retardant sealant used in the need to inhibit the combustion of the building area. Products to meet the GB / T 24267-2009 building flame retardant sealant standard. Qualified flame retardant sealant can be done from the fire self-extinguishing, that is no longer applied to the case of flame sealant to stop burning. Nevertheless, the flame retardant sealant in the continued flame burning will eventually be the same as the ordinary sealant ashes, loss of blocking effect. In the current fire field more and more emphasis on fire conditions to maintain the integrity of the building components in the environment is clearly not meet the requirements. So the flame retardant sealant can not be used as a Fire Proof Seal.

Not only has a flame retardant sealant self-extinguishing flame retardant capacity, but also in the high temperature that is not the case of fire ashing, no powder, ceramic occurs. Continue to maintain the sealant sealing effect, effectively maintaining the integrity of building components. Prevent cigarettes It must comply with the national mandatory standards GB 23864 fire blocking material at 1000 degrees Celsius at least 3h to keep the backfire surface temperature below 180 degrees Celsius, while the back of the fire surface to be intact, no cracking, do not channeling fire.

The most important function of the Fire Proof Seal used in the construction field is to emphasize the ability to maintain the integrity of building components in the event of a fire. Jintai Chemical's DJ-A3-AT178 Fire Proof Seal has the function of ordinary sealant under normal circumstances. It has the function of sealing and sealing the building gap and has certain displacement ability. When the fire occurs, the Fire Proof Seal Increased temperature of the surrounding colloid gradually hardened and ceramicized, play a role in the closure of the gap, to prevent the flame and smoke from the gap in the further spread.

In the high temperature calcination after the ordinary sealant will be ashes, and DJ-A3-AT178 with the temperature rise through the addition of ore powder will be the role of ceramic, not ashing, not powder. The ceramic structure formed after colloid calcination is also affected by the conditions such as bubble density, calcination temperature curve, external pressure and other conditions.