Curing of silicon-organic oligomers

Composites cured by the polyaddition mechanism are especially interesting for reactive molding, because by-products are not formed and there is no appreciable shrinkage during the reaction. This is the principal difference between polyaddition and polycondensation. 

A reinforcing filler, for example, highly dispersed silicon dioxide, is added to the mixture to produce vulcanizated material with improved strength. Cast silicone organic composites are widely used in electrical and electronic devices, in medicine, in the aircraft industry, etc., due to their ease of processing and the advantageous physical and chemical properties of the cured materials. 

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