Classification of quality RTV SILICONE SEALANT ADHESIVE (ACID)
Quality RTV SILICONE SEALANT ADHESIVE (ACID) mostly adopts the condensation type curing system of room temperature vulcanization (RTV), that is, it does not need to be heated during curing, and can be cured at room temperature, and some small molecular substances will be released during the curing process.
1. Classification according to curing system
According to the type of small molecules released during curing, quality RTV SILICONE SEALANT ADHESIVE (ACID) can be mainly divided into deacetic acid type, deketoxime type, dealcohol type, deamidation type, etc.
Deacetic acid type silicone sealant is usually called "acid glue". It has fast vulcanization speed and good transparency, but it releases acetic acid during the curing process, has a pungent odor, and is harmful to metals, coated glass and some inorganic materials. Corrosive.
Deketoxime type silicone sealant belongs to "neutral glue" and is widely used. It releases butanone oxime during curing, which is non-corrosive to aluminum, coated glass and inorganic materials, but is not corrosive to copper, lead, zinc and Polycarbonate is corrosive.
Dealcoholized silicone sealant belongs to "neutral glue" and has a wider range of use. It releases small molecular alcohols during the curing process and is non-corrosive to any material.
The quality RTV SILICONE SEALANT ADHESIVE (ACID) has a very low modulus and is mainly used for caulk sealing in airports, roads, bridges and other occasions that require low modulus and high displacement.
2. Classification according to the number of components
According to the number of components in the product, quality RTV SILICONE SEALANT ADHESIVE (ACID) can usually be divided into two categories: one-component and two-component. The one-component construction silicone sealant has only one component. When using, the glue can be directly squeezed from the packaging to the glue-using part with a glue gun, which is very convenient and is not prone to operating errors. One-component silicone building sealants are generally cured by reacting with moisture in the air, and the curing process is gradually carried out from the surface to the deep layer. Therefore, the deep curing speed is relatively slow, and the construction depth, width, ambient temperature. , environmental humidity, etc. have certain requirements, which are greatly affected by environmental humidity.
The quality RTV SILICONE SEALANT ADHESIVE (ACID) has two components, A and B. When using, you need to mix the two components evenly, and then inject the glue into the glue part within a certain period of time. After mixing for a certain period of time, the sealant will Hardened and unusable. Two-component construction silicone sealant must be constructed using two-component mixing equipment. On the one hand, the manual mixing is not uniform, and on the other hand, it will be wrapped in air bubbles, which will affect the use effect. As a result, two-component products are more complex to use than single-component products, increasing the mixing process and the risk of operational errors. However, the two-component silicone building sealant can be cured by mixing the two components evenly. It does not need to react with water in the air during the curing process. The surface and deep layers are cured at the same time. The deep curing speed is fast, and the curing speed can be passed through Adjust the mixing ratio of components A and B for adjustment, which is not affected by construction depth, width and ambient humidity. In addition, the use of a two-component glue machine can greatly improve labor efficiency.
3. Classification by function
The quality RTV SILICONE SEALANT ADHESIVE (ACID) can be divided into silicone structural sealant and silicone sealant according to the function of use.
Silicone structural sealant not only plays a role in sealing, but also plays a role in structural bonding. It is mainly used in glass curtain walls where structural bonding is required, such as the bonding of glass and aluminum frames in hidden frame glass curtain walls. , Second sealing of insulating glass for framed glass curtain wall, bonding between glass plate and glass rib in full glass curtain wall, etc.
Silicone sealants are mainly used for sealing, and are mainly used for joint sealing of curtain walls, doors and windows, airport runways, highways, other roads and bridges. Among them, the silicone sealant used for curtain wall is usually called "weather sealant".
MODIFIED ACRYLIC AB ADHESIVE (BOXES) uses methyl methacrylate as the main raw material, with tougheners, reinforcing agents, stabilizers, initiators, polymerization inhibitors, etc., two components synthesized through advanced technology (A, B) Reactive structural adhesive.