Intumescent silicone rubber composition

Details Intumescent silicone rubber composition Intumescent silicone rubber composition

1994-10-05

1996-04-16

Szekely, Peter A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

521 86, 521 91, 521154, 521927, 524268, 524442, C09K 2102, C09K 2114, C08K 554, C08K 334

Patent

active

055083218

ABSTRACT:
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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patent: 5047449 (1991-09-01), Pastureau
patent: 5262454 (1993-11-01), Leroux et al.

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