C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 43/04 (2006.01) B29C 44/60 (2006.01) C08J 9/02 (2006.01) B29C 35/08 (2006.01)
Patent
CA 2059162
Abstract of the Disclosure The specification describes and claims a method of making silicone foam compositions comprising the steps of introducing into a moulding cavity a quantity of foamable silicone compositions which is curable at room, or slightly elevated, temperature and bring about curing in the cavity to produce a cured silicone foam. The moulding cavity is closed prior to foaming thereby restricting expansion of the foam. The volume of the closed moulding cavity is a minimum 10% less than that which would be occupied by the composition if it foamed and cured at room temperature without restriction. Lower density foams formed by the above procedure may be converted into rigid elastomeric low density materials by a heat or microwave post cure. For a given composition and foam density the fire resis- tance of a foam produced by a method according to the invention is greater than a foam which is allowed to foam freely.
Descamps Pierre
Wolf Andreas T. F.
Dow Corning S.a.
Gowling Lafleur Henderson Llp
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