Name | Neutral silicone sealant |
Synonyms | Neutral silicone sealant |
Use | Applications for glass, aluminum, ceramic tiles, masonry, cement, steel, glass fiber and other materials. |
application
elastic silicone sealant is widely used in construction, automobile, electronic and electrical, aviation and other fields due to its excellent weather resistance and aging resistance, and its deformation and displacement resistance of 50% in a wide temperature range. With the high-rise of buildings, people put forward higher requirements for the safety of building materials. Therefore, the fire and flame retardancy of silicone sealant has become the focus of attention. Although silicone rubber has good high temperature resistance, it does not have flame retardancy and will continue to burn after ignition.
Preparation
the preparation method of silicone sealant includes the following steps: a. 100 parts of hydroxyl-terminated polydimethylsiloxane, 1-5 parts of fumed white carbon black and 1-150 parts of nano calcium carbonate, dehydration for 1-4 hours, and cooling to room temperature to obtain a base material; B, add 1-12 parts of coupling agent, 0.1-4 parts of tackifier, 8-60 parts of plasticizer, 0.1-1.8 parts of antifungal agent and 0.1-5 parts of catalyst, and stir for 0.5-2 hours under the vacuum degree of 0.075-0.095MPa to obtain silicone sealant.