One-component room temperature vulcanized silicone rubber
The curing reaction of one-component room temperature vulcanized silicone rubber is vulcanized into an elastomer by interacting with moisture in the air. With the different chain agents, one-component room temperature vulcanized silicone rubber can be deacidified, deoxidized, dealcoholized, deamined, deamidated, and deketoned. The curing time of one-component room temperature vulcanized silicone rubber depends on the vulcanization system, temperature, humidity and thickness of the silicone rubber layer. Increasing the temperature and humidity of the environment can speed up the vulcanization process. Under typical environmental conditions, after 15 to 30 minutes, the surface of the silicone rubber may not be tacky, and the 0.3 cm thick adhesive layer can be cured within one day. The depth and strength of curing will gradually increase in about three weeks. Two-component condensation type room temperature vulcanized silicone rubber
Two-component room temperature vulcanized silicone rubber
The sulfurization reaction is not initiated by the moisture in the air, but by the catalyst. The rubber compound and the catalyst are usually packaged as one component. Curing only begins when the two components are completely mixed together. The curing time of two-component condensation type room temperature vulcanized silicone rubber mainly depends on the type, amount and temperature of the catalyst. The more catalyst used, the faster the sulfidation, and the shorter the rest time. At room temperature, the shelf time is generally a few hours. If you want to extend the shelf time of the rubber, you can use the cooling method. It takes about one day for the two-component condensation type room temperature vulcanized silicone rubber to achieve complete curing at room temperature, but it only takes one hour at 150 ° C. The synergistic effect through the use of accelerators can significantly increase its curing speed.