Fire stop article
Assignee3M Innovative Properties Company
InventorMichael G. Dykhoff
Life of this patent
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Abstract
A composite fire stopping article capable of fire stopping through-penetrations without the need for a secondary reinforcement structure includes an interior insulating material, such as mineral wool, sandwiched between layers of an intumescent material. The insulating material and intumescent material may be enclosed in a bag formed of a polymeric material. The intumescent material is substantially free of graphite and consists essentially of filler material, binder material, and a hydrated alkali metal silicate intumescent component.
Claims21
A fire barrier assembly for fire stopping an opening in a partition, comprising a plurality of fire stop articles arranged in the opening without a secondary support structure, each fire stop article comprising an interior insulating material, and an intumescent material arranged around at least a portion of said interior insulating material, said intumescent material comprising filler material, binder material, and a hydrated alkali metal silicate intumescent component.
A method of fire stopping an opening in a partition to form a fire barrier in the opening without a secondary support structure, comprising the step of:
- (a) arranging a plurality of fire stop articles in the opening, each fire stop article comprising
- (i) an interior insulating material;
- and
- (ii) an intumescent material arranged around at least a portion of said interior insulating material, said intumescent material comprising filler material, binder material, and a hydrated alkali metal silicate intumescent component.
A fire barrier installation, comprising:
- (a) a partition containing an opening;
- and
- (b) a plurality of fire stop articles arranged in said opening without a secondary support structure, each fire stop article comprising
- (i) an interior insulating material;
- and
- (ii) an intumescent material arranged around at least a portion of said interior insulating material, said intumescent material comprising filler material, binder material, and a hydrated alkali metal silicate intumescent component.
Dependencies are inferred from the claim text.