CA2211214A1 - Molded and encapsulated fire retardant material - Google Patents
Molded and encapsulated fire retardant materialInfo
- Publication number
- CA2211214A1 CA2211214A1 CA 2211214 CA2211214A CA2211214A1 CA 2211214 A1 CA2211214 A1 CA 2211214A1 CA 2211214 CA2211214 CA 2211214 CA 2211214 A CA2211214 A CA 2211214A CA 2211214 A1 CA2211214 A1 CA 2211214A1
- Authority
- CA
- Canada
- Prior art keywords
- fire
- retarding
- aging
- intumescent
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Building Environments (AREA)
Abstract
The fire-retardant material may be positioned in an article adapted to be installed in an opening in a fire-rated, structure. It retards the transmission of heat and flame from a fire through the article and the structure opening, so as to enable the fire rating of the structure to be substantially the same with or without the structure opening and article therein. It further is adapted to be molded and encapsulated in a composition for sealing all side edges, to retard the aging and degrading process, and to protect against damage from high humidity and evaporation. It further includes substantial interior space to enable full expansion during exposure to increasing heat and flame from a fire.
Description
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates generally to fire-retardant material. It relates specifically to a fire-retardant material further adapted to retard the aging and degrading process thereof.
Description of The Related Art Fire retardant material, for retarding the transmission of heat and flame from a fire, may comprise for example intumescent material which may be positioned in an article such as an after-set in-floor poke-through fittinq. The fitting may be positioned in an opening formed in a fire-rated structure such as a floor.
The material may be activated by occurrence of fire upon exposure to heat and flame from the fire. Upon activation, the material may absorb heat and expand under pressure to form a flexible foam which fills open spaces and hardens into a refractory char with increasing temperature.
The activated material functions to enable the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein.
Such fire-retardant material previously has been formed into the desired shape by cutting flat sheets of intumescent material sandwiched between top and bottom layers of protective material.
However, the side cut edges of such fire-retardant material are exposed since they are not covered by the protective layers. Such exposure accelerates the aging process and consequently the rate of degradation of such fire-retardant material. Such materials previously have not retarded such aging and degradation.
Further, such exposure subjects such,material to damage in high humidity locations, and in new construction as in a concrete slab floor which is undergoing curing, where it is subjected to extensive evaporation.
Also, such material previously provided only a limited interior space for expansion, preventing full expansion during exposure to increasing heat and flame from a fire, thereby limiting the effectiveness of such material.
SUMMARY OF THE INVENTION
The material of the invention overcomes the above problems and others associated with prior materials.
It comprises a material for retarding the transmission of heat and flame from a fire. The material may be positioned in an article such as a service fitting adapted to be positioned in an opening formed in a fire-rated structure such as a floor.
Such material enables the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein.
The material further is adapted to be molded in the desired ~hape, and encapsulated in a composition for sealing all side edges, to retard the aging and degrading process. It also is adapted to protect against damage from high humidity and evaporation.
Such material further includes substantial interior space to enable full expansion during exposure to increasing heat and flame from a fire.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention comprises a material for retarding the transmission of heat and flame from a fire to a structure which is fire-rated, such that the fire rating of the structure may be maintained. It is further adapted to retard the aging and degrading process of the fire retarding material.
The fire retardant material is adapted to be positioned in an article positionable in the fire-rated structure, such as an after-set in-floor poke-through fitting positionable in a floor opening formed in a fire-rated floor.
The fire retarding material may comprise an intumescent material, such as hydrated sodium silicate. The intumescent material may comprise coated rubber intumescent material, such as a proprietary material sold under the mark FB-525 by Alva-Tech, Inc., Asbury Park, New Jersey, of the type described in U.S. Patent No. 4,588,523. Such material absorbs heat and begins to expand upon exposure to heat and flame. Expansion is substantial at a relatively low temperature of about 250~F.
It expands to about 1.5 times its initial volume or density at about 250~, to about 2.8 times at about 350~, and to about 4 times at about 500~F. The resultant flexible foam rapidly seals any existing openings. The intumescent material may be cast in the desired shape, and encapsulated in a composition such as polyvinyl chloride.
The intumescent material may alternatively comprise a graphite intumescent material in a urethane matrix, such as a non-halogen proprietary material sold under the mark FB65NH by Alva-Tech, Inc., Asbury Park, New Jersey. It also absorbs heat and begins to expand upon exposure to heat and flame.
Expansion starts at about 400~F, with significant expansion after about 500~F, and continuing until about 1000~F. It expands to about 8 to 20 times its initial volume or density.
It forms a dense insulative char when activated. The graphite material compacts. It can be custom molded in the desired shape.
Such intumescent material may be formed between top and bottom protective layers of material such as neoprene, with the side edges exposed. The aging retarding elements may comprise molded and encapsulated fire retardant material for sealing all side edges of the intumescent material.
The molded fire retardant material includes an internal space formed thereby, which enables substantially complete expansion of the fire retardant material. The internal space formed in the molded fire retardant material is substantially larger than the internal space formed in prior fire retardant material.
The fire retardant material forms an insulating barrier to control temperature increases and retard the spread of flames. It further protects against heat and flame by forming a refractory char as the temperature continues to rise.
In operation, the fire retardant material is activated by occurrence of fire upon exposure to heat and flame from the fire.
The intumescent material of which the fire retardant material is comprised absorbs heat, and is activated to expand under pressure. It forms flexible foam seals, sealing openings, and forming very strong refractory chars. It seals openings to form efficient heat and smoke barriers, retarding transmission of heat and flame from the fire.
The fire retardant material is thereby activated upon exposure to heat and flame from a fire to prevent the heat and flame from being transmitted therethrough. This enables the fire rating of the structure, such as a fire-rated floor, to be substantially the same with or without a floor opening and article therein in which the fire retarding material is positioned.
In use, the fire-retardant material retards the transmission of heat and flame from a fire, and maintains the fire-rating of the structure. It is comprised of intumescent material such as coated rubber intumescent material or graphite intumescent material in a urethane matrix.
The fire retardant material may be molded in the desired shape, and encapsulated in a composition such as polyvinyl chloride, for sealing all side edges, to retard the aging and degrading process thereof. The molded and encapsulated fire retardant material also protects against damage in high humidity locations, and evaporation in new construction locations. It includes substantial interior space for full expansion during exposure to increasing heat and flame from a fire.
Preferred embodiments of the invention have been set forth above, for the purpose of explaining the invention. -However, it is to be understood that variations in such embodiment may be made which are nevertheless within the scope and spirit of the invention as set forth in the claims.
Field of the Invention This invention relates generally to fire-retardant material. It relates specifically to a fire-retardant material further adapted to retard the aging and degrading process thereof.
Description of The Related Art Fire retardant material, for retarding the transmission of heat and flame from a fire, may comprise for example intumescent material which may be positioned in an article such as an after-set in-floor poke-through fittinq. The fitting may be positioned in an opening formed in a fire-rated structure such as a floor.
The material may be activated by occurrence of fire upon exposure to heat and flame from the fire. Upon activation, the material may absorb heat and expand under pressure to form a flexible foam which fills open spaces and hardens into a refractory char with increasing temperature.
The activated material functions to enable the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein.
Such fire-retardant material previously has been formed into the desired shape by cutting flat sheets of intumescent material sandwiched between top and bottom layers of protective material.
However, the side cut edges of such fire-retardant material are exposed since they are not covered by the protective layers. Such exposure accelerates the aging process and consequently the rate of degradation of such fire-retardant material. Such materials previously have not retarded such aging and degradation.
Further, such exposure subjects such,material to damage in high humidity locations, and in new construction as in a concrete slab floor which is undergoing curing, where it is subjected to extensive evaporation.
Also, such material previously provided only a limited interior space for expansion, preventing full expansion during exposure to increasing heat and flame from a fire, thereby limiting the effectiveness of such material.
SUMMARY OF THE INVENTION
The material of the invention overcomes the above problems and others associated with prior materials.
It comprises a material for retarding the transmission of heat and flame from a fire. The material may be positioned in an article such as a service fitting adapted to be positioned in an opening formed in a fire-rated structure such as a floor.
Such material enables the fire rating of the floor to be substantially the same with or without the floor opening and fitting therein.
The material further is adapted to be molded in the desired ~hape, and encapsulated in a composition for sealing all side edges, to retard the aging and degrading process. It also is adapted to protect against damage from high humidity and evaporation.
Such material further includes substantial interior space to enable full expansion during exposure to increasing heat and flame from a fire.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention comprises a material for retarding the transmission of heat and flame from a fire to a structure which is fire-rated, such that the fire rating of the structure may be maintained. It is further adapted to retard the aging and degrading process of the fire retarding material.
The fire retardant material is adapted to be positioned in an article positionable in the fire-rated structure, such as an after-set in-floor poke-through fitting positionable in a floor opening formed in a fire-rated floor.
The fire retarding material may comprise an intumescent material, such as hydrated sodium silicate. The intumescent material may comprise coated rubber intumescent material, such as a proprietary material sold under the mark FB-525 by Alva-Tech, Inc., Asbury Park, New Jersey, of the type described in U.S. Patent No. 4,588,523. Such material absorbs heat and begins to expand upon exposure to heat and flame. Expansion is substantial at a relatively low temperature of about 250~F.
It expands to about 1.5 times its initial volume or density at about 250~, to about 2.8 times at about 350~, and to about 4 times at about 500~F. The resultant flexible foam rapidly seals any existing openings. The intumescent material may be cast in the desired shape, and encapsulated in a composition such as polyvinyl chloride.
The intumescent material may alternatively comprise a graphite intumescent material in a urethane matrix, such as a non-halogen proprietary material sold under the mark FB65NH by Alva-Tech, Inc., Asbury Park, New Jersey. It also absorbs heat and begins to expand upon exposure to heat and flame.
Expansion starts at about 400~F, with significant expansion after about 500~F, and continuing until about 1000~F. It expands to about 8 to 20 times its initial volume or density.
It forms a dense insulative char when activated. The graphite material compacts. It can be custom molded in the desired shape.
Such intumescent material may be formed between top and bottom protective layers of material such as neoprene, with the side edges exposed. The aging retarding elements may comprise molded and encapsulated fire retardant material for sealing all side edges of the intumescent material.
The molded fire retardant material includes an internal space formed thereby, which enables substantially complete expansion of the fire retardant material. The internal space formed in the molded fire retardant material is substantially larger than the internal space formed in prior fire retardant material.
The fire retardant material forms an insulating barrier to control temperature increases and retard the spread of flames. It further protects against heat and flame by forming a refractory char as the temperature continues to rise.
In operation, the fire retardant material is activated by occurrence of fire upon exposure to heat and flame from the fire.
The intumescent material of which the fire retardant material is comprised absorbs heat, and is activated to expand under pressure. It forms flexible foam seals, sealing openings, and forming very strong refractory chars. It seals openings to form efficient heat and smoke barriers, retarding transmission of heat and flame from the fire.
The fire retardant material is thereby activated upon exposure to heat and flame from a fire to prevent the heat and flame from being transmitted therethrough. This enables the fire rating of the structure, such as a fire-rated floor, to be substantially the same with or without a floor opening and article therein in which the fire retarding material is positioned.
In use, the fire-retardant material retards the transmission of heat and flame from a fire, and maintains the fire-rating of the structure. It is comprised of intumescent material such as coated rubber intumescent material or graphite intumescent material in a urethane matrix.
The fire retardant material may be molded in the desired shape, and encapsulated in a composition such as polyvinyl chloride, for sealing all side edges, to retard the aging and degrading process thereof. The molded and encapsulated fire retardant material also protects against damage in high humidity locations, and evaporation in new construction locations. It includes substantial interior space for full expansion during exposure to increasing heat and flame from a fire.
Preferred embodiments of the invention have been set forth above, for the purpose of explaining the invention. -However, it is to be understood that variations in such embodiment may be made which are nevertheless within the scope and spirit of the invention as set forth in the claims.
Claims (25)
1. A material for retarding the transmission of heat and flame from a fire to a structure which is fire-rated, such that the fire rating of the structure may be maintained, adapted to retard the aging and degrading process of the material, comprising:
(a) means for retarding the transmission of heat and flame from a fire to the fire-rated structure; and (b) means for retarding the aging and degrading process of the fire transmission retarding means.
(a) means for retarding the transmission of heat and flame from a fire to the fire-rated structure; and (b) means for retarding the aging and degrading process of the fire transmission retarding means.
2. A material as in claim 1, in which the fire transmission retarding means comprise an element comprised of fire retarding material.
3. A material as in claim 1, in which the fire retarding means include side edges, and the aging retarding means comprise means for sealing the side edges of the fire retarding means.
4. A material as in claim 1, in which the aging retarding means comprise means for molding the fire retarding means.
5. A material as in claim 1, in which the aging retarding means comprise means for encapsulating the fire retarding means.
6. A material as in claim 1, in which the aging retarding means comprise means for molding and encapsulating the fire retarding means.
7. A material as in claim 2, in which the fire retarding material comprises intumescent material.
8. A material as in claim 4, in which the molding means enable the formation of an internal space for substantially complete expansion of the fire transmission retarding means, substantially larger than the internal space in prior fire transmission retarding means.
9. A material as in claim 7, in which the intumescent material comprises coated rubber intumescent material.
10. A material as in claim 7, in which the intumescent material comprises graphite intumescent material in a urethane matrix.
11. A material as in claim 9, in which the coated rubber intumescent material is cast in the desired shape.
12. A material as in claim 9, in which the coated rubber intumescent material is encapsulated in an encapsulating composition.
13. A material as in claim 12, in which the encapsulating composition comprises polyvinyl chloride.
14. A material for retarding the transmission of heat and flame from a fire to a structure which is fire-rated, such that the fire rating of the structure may be maintained, adapted to retard the aging and degrading process of the material, comprising:
(a) means for retarding the transmission of heat and flame from a fire to the fire-rated structure, comprising an element comprised of fire retarding material; and (b) means for retarding the aging and degrading process of the fire retarding means.
(a) means for retarding the transmission of heat and flame from a fire to the fire-rated structure, comprising an element comprised of fire retarding material; and (b) means for retarding the aging and degrading process of the fire retarding means.
15. A material as in claim 14, in which the fire retarding means include side edges, and the aging retarding means comprise means for sealing the side edges of the fire retarding means.
16. A material as in claim 14, in which the aging retarding means comprise means for molding the fire retarding means.
17. A material as in claim 14, in which the aging retarding means comprise means for encapsulating the fire retarding means.
18. A material as in claim 14, in which the aging retarding means comprise means for molding and encapsulating the fire retarding means.
19. A material as in claim 14, in which the fire retarding material comprises intumescent material.
20. A material as in claim 16, in which the molding means enable the formation of an internal space for substantially complete expansion of the fire transmission retarding means, substantially larger than the internal space in prior fire transmission retarding means.
21. A material as in claim 18, in which the intumescent material comprises coated rubber intumescent material.
22. A material as in claim 18, in which the intumescent material comprises graphite intumescent material in a urethane matrix.
23. A material as in claim 21, in which the coated rubber intumescent material is cast in the desired shape.
24. A material as in claim 21, in which the coated rubber intumescent material is encapsulated in an encapsulating composition.
25. A material as in claim 24, in which the encapsulating composition comprises polyvinyl chloride.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85021197A | 1997-05-02 | 1997-05-02 | |
| US08/850,211 | 1997-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2211214A1 true CA2211214A1 (en) | 1998-11-02 |
Family
ID=25307562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2211214 Abandoned CA2211214A1 (en) | 1997-05-02 | 1997-07-22 | Molded and encapsulated fire retardant material |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2211214A1 (en) |
| MX (1) | MX9705633A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7585443B2 (en) | 2004-05-20 | 2009-09-08 | Albemarle Corporation | Pelletized brominated anionic styrenic polymers and their preparation and use |
-
1997
- 1997-07-22 CA CA 2211214 patent/CA2211214A1/en not_active Abandoned
- 1997-07-25 MX MX9705633A patent/MX9705633A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7585443B2 (en) | 2004-05-20 | 2009-09-08 | Albemarle Corporation | Pelletized brominated anionic styrenic polymers and their preparation and use |
| US8067088B2 (en) | 2004-05-20 | 2011-11-29 | Albemarle Corporation | Pelletized brominated anionic styrenic polymers and their preparation and use |
Also Published As
| Publication number | Publication date |
|---|---|
| MX9705633A (en) | 1998-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |