Patent ID: 8173717

Claim:
A process for making closed cell silicone foam comprising the steps of: a1) partially curing a silicone base by mixing the base with a curing agent to yield a silicone base precursor, then a2) placing the silicone base precursor in an autoclave and subjecting the silicone base precursor to at least one inert gas at a pressure higher than atmospheric in order to drive gas into it, then b) within the autoclave, reducing the pressure in order to expand the silicone base to produce closed cell silicone foam, and then c) curing the expanded silicone foam, wherein at least two curing agents are employed, a first curing agent for step a1) and a second curing agent for step c), and wherein the first curing agent can be activated without activating the second curing agent, wherein closed cell silicone foam is formed.