Fire resistant vermiculite composition board

Details Fire resistant vermiculite composition board Fire resistant vermiculite composition board

C - Chemistry, Metallurgy

04

B

92/62, 92/10.1

C04B 26/28 (2006.01) C04B 30/02 (2006.01) D21J 1/08 (2006.01)

Patent

CA 1045864

ABSTRACT A fire resistant vermiculite composition board comprises, in percent by weight, from 40 to 90% heat expanded vermiculite particles; from 5 to 20% ceramic clay particles; from 10 to 30% hydrated cellulosic gel; from 1 to 20% defiberized wood; and from 1 to 20% starch. The vermiculite is in an incompletely expanded condition of a degree predetermined to permit its further expan- sion upon subsequent exposure to heat. This results in a corres- ponding expansion of the composition board of which it is a com- ponent when the board is exposed to fire, preventing the forma- tion of cracks and insuring continued fire protecting coverage of the area across which the board is applied.

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