UV-curable silicone resins are commonly used in the electrical and electronics manufacturing industry due to their rapid cross-linking properties at low temperatures. One-component and two-component silicone systems that cure at room temperature, namely RTV-1 and RTV-2 silicone (RTV= room temperature cure), are also commonly used. The RTV-1 system solidifies under humidification to the final product. This reaction is also known as coagulation. To ensure full curing, these silicone resins are only used for thin coating. It will not solidify in an enclosed environment without air entry. This is where the RTV-2 system comes in.
RTV-2 silicone can be cured by setting reaction or additive reaction, that is, by humidifying or adding appropriate curing agent. Higher coating thickness can be obtained with a two-component system. Its curing is also less dependent on external conditions than RTV-1 silicone. Systematic raising of temperature can significantly speed up the curing process. However, when using an RTV-2 system, you must always ensure that the mixing rate of the two components is accurate. If not enough curing agent is added, the material will not cure completely. The resin will remain sticky and soft, and the mechanical stability will decrease sharply. If too much curing agent is added, the activation period will be shortened and the mechanical stability of the material bonding will be seriously damaged.