Study of properties of four silicone rubber systems for grid structure mould

Typical properties of four RTV silicone rubber systems for grid structure would were analyzed in this paper.The results showed that these four silicone rubber systems have low linear shrinkage and long gelalion time.However,addition type RTV rubber is of excellent mechanical properties at room temperature , higher thermal stability and thermal expansion property compared with that of condensation type rubber.Consequently, it completely meets a demand for silicone rubber mould of grid structure.