Intumescent silicone rubber composition

Details Intumescent silicone rubber composition Intumescent silicone rubber composition

C - Chemistry, Metallurgy

09

K

C09K 21/14 (2006.01)

Patent

CA 2159165

An intumescent silicone rubber composition is provided having an expandable intumescent material present in the composition by up to 20% by weight, a polyorganosiloxane oil present in an amount from about 10% to about 40% by weight of the composition, a hydrated alkali metal silicate present in an amount: of up to 80% by weight of the composition and a silicone elastomer binder present in an amount from about 4% to about 30% by weight of the composition. The result is a very effective and relatively inexpensive composition which when used as firestop material around combustible pipe, such as PVC or ABS, readily meets the test criteria set forth under ASTM Standard E-814.

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