WO2010147710A1 - Flame propagation resistant foam and method - Google Patents

Flame propagation resistant foam and method Download PDF

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Publication number
WO2010147710A1
WO2010147710A1 PCT/US2010/033899 US2010033899W WO2010147710A1 WO 2010147710 A1 WO2010147710 A1 WO 2010147710A1 US 2010033899 W US2010033899 W US 2010033899W WO 2010147710 A1 WO2010147710 A1 WO 2010147710A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
foam substrate
retardant solution
foam
retardant
Prior art date
Application number
PCT/US2010/033899
Other languages
French (fr)
Inventor
George F. Nicholas Nicholas
Original Assignee
The Boeing Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by The Boeing Company filed Critical The Boeing Company
Priority to EP10719500.0A priority Critical patent/EP2443187B1/en
Priority to CA2764944A priority patent/CA2764944C/en
Priority to CN2010800271183A priority patent/CN102459441A/en
Publication of WO2010147710A1 publication Critical patent/WO2010147710A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/06—Organic materials
    • C09K21/12—Organic materials containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0038—Use of organic additives containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C08J9/40—Impregnation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2205/00—Foams characterised by their properties
    • C08J2205/04—Foams characterised by their properties characterised by the foam pores
    • C08J2205/05—Open cells, i.e. more than 50% of the pores are open

Definitions

  • the present patent application relates to foams having improved resistance to radiant panel flame propagation and, more particularly, to flame propagation resistant thermal and acoustic foams.
  • Open cell foams such as melamine resin foams
  • melamine resin foams are lightweight and have thermal and acoustic properties that render such foams attractive as insulation materials in commercial aircraft applications.
  • open cell foam insulation materials may be easier to install than traditional fiberglass insulation materials and, therefore, may potentially reduce overall manufacturing costs.
  • thermal and acoustic insulation materials used in commercial aircraft applications are subject to governmental regulations regarding flammability.
  • various government regulations require testing for radiant panel flammability, vertical burn, combustion toxic gas generation and combustion smoke generation.
  • the radiant panel test requires that insulation materials, alone or, more typically, covered in protective films, be subjected to a directed on surface propane pilot flame for 15 seconds, while being under an intense radiant heat source that measures 1.7 Watts/cm at the zero point.
  • the insulation material must resist propagating a flame greater than 2 inches, nearly an inch of which typically occurs as an artifact of the flame's initial strike on the surface.
  • any after- flame on the material must self-extinguish within 3 seconds.
  • the disclosed flame propagation resistant foam may include a foam substrate that was contacted with a flame-retardant solution that includes an organic phosphate ester in water, wherein, after contacting, the foam substrate was cured at a predetermined temperature for a predetermined amount of time.
  • the disclosed method for making a flame propagation resistant foam from a foam substrate may include the steps of preparing a flame-retardant solution that includes an organic phosphate ester in water, contacting the foam substrate with the flame-retardant solution to obtain a partially treated foam substrate and curing the partially treated foam substrate at a predetermined temperature for a predetermined amount of time.
  • the disclosed flame propagation resistant foam may include a melamine resin foam substrate that was contacted with a flame-retardant solution including an organic phosphate ester in an aqueous carrier, wherein the organic phosphate ester comprises about 0.1 to about 2 percent by weight of the flame-retardant solution, and wherein the melamine resin foam substrate was mechanically deformed while in contact with the flame-retardant solution, and wherein, after contacting, the foam substrate was cured at a predetermined temperature for a predetermined amount of time.
  • the disclosed method for making a flame propagation resistant foam from a melamine resin foam substrate may include the steps of preparing a flame-retardant solution including an organic phosphate ester in an aqueous carrier, wherein the organic phosphate ester comprises about 0.1 to about 2 percent by weight of the flame-retardant solution, contacting the melamine resin foam substrate with the flame-retardant solution, during the contacting step, mechanically deforming the melamine resin foam substrate and, after the contacting step, curing the melamine resin foam substrate at a predetermined temperature for a predetermined amount of time.
  • Fig. 1 is a flow chart illustrating one aspect of the disclosed method for making a flame propagation resistant foam.
  • one aspect of the disclosed method for making a flame propagation resistant foam may begin by preparing a flame-retardant solution, as shown at block 12. Then, as shown at block 14, a foam substrate may be contacted with the flame-retardant solution. After removing excess flame-retardant solution from the foam substrate (block 16), the treated foam substrate may be cured, as shown at block 18. The steps shown in blocks 14 and 16 may be repeated one or more times to increase the penetration of the flame-retardant solution into the foam substrate.
  • the foam substrate may be any open cell foam material.
  • the foam substrate may be a low density open cell polymeric resin foam.
  • the foam substrate may be BASOTECT ® melamine resin foam available from BASF Aktiengesellschaft of Ledwigshafen am Rhein, Germany.
  • the foam substrate may be provided as a panel and may have a panel thickness.
  • the panel thickness may range from about 1 to about 3 inches. Of course, lesser or greater thicknesses may be used without departing from the scope of the present disclosure.
  • the foam substrate may be provided as a block, wherein the block may be dimensioned to accommodate a specific application.
  • the flame-retardant solution may be an aqueous solution comprising one or more organic phosphate esters in an aqueous carrier (e.g., water). It is believed that organic phosphate esters impart the disclosed flame-retardant solution with flame-retardant properties, as is discussed herein.
  • the flame-retardant solution may additionally include other flame-retardant components.
  • An example of another flame-retardant component useful in the disclosed flame-retardant solution is an inorganic flame retardant, such as aluminum hydroxide.
  • the organic phosphate ester component of the disclosed flame-retardant solution may be a single organic phosphate ester or a blend of organic phosphate esters.
  • the organic phosphate ester component of the disclosed flame-retardant solution may include one or more alkyl-substituted phosphate esters.
  • the organic phosphate ester component of the disclosed flame-retardant solution may include multiple alkyl-substituted phosphate esters, wherein at least two of the alkyl-substituted phosphate esters have substantially different boiling or vapor points.
  • at least two of the alkyl-substituted phosphate esters in the disclosed flame-retardant solution may have a difference in boiling points of about 1O 0 C.
  • the organic phosphate ester component of the disclosed flame-retardant solution may be obtained from commercially available flame retardants typically used in the textile industry.
  • the organic phosphate ester component may be obtained using PYROZYL M73 available from American Manufacturing International, Inc. (Amitech) or Paterson, New Jersey.
  • the organic phosphate ester component may be obtained using SPARTAN AR 295 available from Spartan Flame Retardants, Inc. of Crystal Lake, Illinois, which is a blend of organic and inorganic components.
  • the organic phosphate ester component may be obtained using FLAMEPROOF #1528 available from Apexical, Inc. of Spartanburg, South Carolina.
  • the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.01 to about 15 percent by weight of the flame-retardant solution. In another aspect, the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.1 to about 5 percent by weight of the flame-retardant solution. In yet another aspect, the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.1 to about 2 percent by weight of the flame-retardant solution. At this point, those skilled in the art will appreciate that the amount of the organic phosphate ester (or esters) in the disclosed flame-retardant solution may depend upon the type of organic phosphate esters used and the type of foam substrate used, among other factors.
  • One exemplary flame-retardant solution may be prepared by mixing 300 milliliters of PYROZYL M73 with 29.7 liters of distilled water.
  • additional functional additives may be included in the disclosed flame-retardant solution without departing from the scope of the present disclosure.
  • additional functional additives include hydrophobants (e.g., aqueous siloxane emulsions), oleophobants (e.g., perfluoroacrylate copolymer emulsions) and formaldehyde scavengers (e.g., SUMITEX BUFFER FW, available from Sumitomo Chemical Co., Ltd. of Tokyo, Japan), as well as auxiliaries such as sequestrants, buffers, levelers, dispersants and biocides.
  • hydrophobants e.g., aqueous siloxane emulsions
  • oleophobants e.g., perfluoroacrylate copolymer emulsions
  • formaldehyde scavengers e.g., SUMITEX BUFFER FW, available from Sumitomo Chemical Co
  • the disclosed flame-retardant solution may be substantially free of brominated compounds and heavy metals.
  • the foam substrate may be contacted with the disclosed flame-retardant solution such that the flame-retardant solution impregnates the foam substrate (i.e., the flame-retardant solution penetrates the surface of the foam substrate and transfers into the internal cross-section).
  • the flame-retardant solution may be received in a vessel, such as a tank, and the foam substrate may be immersed into the flame-retardant solution in the vessel (e.g., by dipping).
  • the foam substrate may be in contact with the flame-retardant solution for a time sufficient to achieve the desired penetration and distribution of the solution into the foam.
  • the temperature of the flame- retardant solution may be controlled to optimize penetration and distribution of the solution into the foam.
  • the foam substrate may be mechanically deformed while in contact with the flame-retardant solution to improve penetration of the solution into the foam.
  • One exemplary technique for mechanically deforming the foam substrate includes repeatedly compressing and relaxing the foam substrate.
  • Another exemplary technique for mechanically deforming the foam substrate includes kneading the foam substrate.
  • excess solution may be removed from the foam substrate. For example, about 90 percent of the absorbed flame-retardant solution may be removed.
  • the treated foam substrate may be allowed to drip dry before proceeding to the curing step.
  • the treated foam substrate may be squeezed to remove excess solution. For example, squeezing may be accomplished by passing the treated foam substrate through a nip defined by two rollers.
  • the foam substrate may again be contacted with the flame-retardant solution, after which excess solution may be removed as discussed above.
  • the steps shown in blocks 14 and 16 may be repeated several time to achieve the desired penetration and distribution of the flame-retardant solution in the foam substrate. For example, the steps shown in blocks 14 and 16 may be performed once for every inch of thickness of the foam substrate.
  • the treated foam substrate may be cured.
  • the step of curing the treated foam substrate may include maintaining the treated foam substrate at a predetermined temperature for a predetermined amount of time.
  • the curing step may be performed in an oven (e.g., a batch oven or a conveyor oven) to facilitate maintaining the desired temperature.
  • the curing oven may include a forced air feature.
  • the curing step may be performed in multiple phases, wherein each phase includes a specific temperature and a specific treatment time.
  • the treated foam substrate may be subjected to an initial cure at about 120 0 C for about 2 hours, followed by a final cure at about 150 0 C for about 30 minutes.
  • the disclosed flame propagation resistant foam may have the desired flammability characteristics, while retaining most or all of the original foam properties, including flexibility and lightweight.

Abstract

A method for making a flame propagation resistant foam from a foam substrate including the steps of preparing a flame-retardant solution that includes an organic phosphate ester in water, immersing the foam substrate in the flame-retardant solution to obtain a partially treated foam substrate and curing the partially treated foam substrate at a predetermined temperature for a predetermined amount of time.

Description

FLAME PROPAGATION RESISTANT FOAM AND METHOD
FIELD
[0001] The present patent application relates to foams having improved resistance to radiant panel flame propagation and, more particularly, to flame propagation resistant thermal and acoustic foams.
BACKGROUND
[0002] Open cell foams, such as melamine resin foams, are lightweight and have thermal and acoustic properties that render such foams attractive as insulation materials in commercial aircraft applications. Furthermore, open cell foam insulation materials may be easier to install than traditional fiberglass insulation materials and, therefore, may potentially reduce overall manufacturing costs.
[0003] However, thermal and acoustic insulation materials used in commercial aircraft applications are subject to governmental regulations regarding flammability. In particular, various government regulations require testing for radiant panel flammability, vertical burn, combustion toxic gas generation and combustion smoke generation. For example, the radiant panel test requires that insulation materials, alone or, more typically, covered in protective films, be subjected to a directed on surface propane pilot flame for 15 seconds, while being under an intense radiant heat source that measures 1.7 Watts/cm at the zero point. Under these conditions, the insulation material must resist propagating a flame greater than 2 inches, nearly an inch of which typically occurs as an artifact of the flame's initial strike on the surface. In addition, any after- flame on the material must self-extinguish within 3 seconds.
[0004] As will be appreciated by those skilled in the art, passing such stringent flammability tests on a consistent, long term basis has proven difficult for typical foam insulation materials. Therefore, aircraft manufacturers have continued to use traditional mineral-based insulation materials.
[0005] Nonetheless, those skilled in the art continue to seek materials, including foam materials, capable of meeting rigorous flammability requirements. SUMMARY
[0006] In one aspect, the disclosed flame propagation resistant foam may include a foam substrate that was contacted with a flame-retardant solution that includes an organic phosphate ester in water, wherein, after contacting, the foam substrate was cured at a predetermined temperature for a predetermined amount of time.
[0007] In another aspect, the disclosed method for making a flame propagation resistant foam from a foam substrate may include the steps of preparing a flame-retardant solution that includes an organic phosphate ester in water, contacting the foam substrate with the flame-retardant solution to obtain a partially treated foam substrate and curing the partially treated foam substrate at a predetermined temperature for a predetermined amount of time.
[0008] In another aspect, the disclosed flame propagation resistant foam may include a melamine resin foam substrate that was contacted with a flame-retardant solution including an organic phosphate ester in an aqueous carrier, wherein the organic phosphate ester comprises about 0.1 to about 2 percent by weight of the flame-retardant solution, and wherein the melamine resin foam substrate was mechanically deformed while in contact with the flame-retardant solution, and wherein, after contacting, the foam substrate was cured at a predetermined temperature for a predetermined amount of time.
[0009] In yet another aspect, the disclosed method for making a flame propagation resistant foam from a melamine resin foam substrate may include the steps of preparing a flame-retardant solution including an organic phosphate ester in an aqueous carrier, wherein the organic phosphate ester comprises about 0.1 to about 2 percent by weight of the flame-retardant solution, contacting the melamine resin foam substrate with the flame-retardant solution, during the contacting step, mechanically deforming the melamine resin foam substrate and, after the contacting step, curing the melamine resin foam substrate at a predetermined temperature for a predetermined amount of time.
[0010] Other aspects of the disclosed flame propagation resistant foam and method will become apparent from the following description, the accompanying drawings and the appended claims. BRIEF DESCRIPTION OF THE DRAWING
[0011] Fig. 1 is a flow chart illustrating one aspect of the disclosed method for making a flame propagation resistant foam.
DETAILED DESCRIPTION
[0012] Referring to Fig. 1, one aspect of the disclosed method for making a flame propagation resistant foam, generally designated 10, may begin by preparing a flame-retardant solution, as shown at block 12. Then, as shown at block 14, a foam substrate may be contacted with the flame-retardant solution. After removing excess flame-retardant solution from the foam substrate (block 16), the treated foam substrate may be cured, as shown at block 18. The steps shown in blocks 14 and 16 may be repeated one or more times to increase the penetration of the flame-retardant solution into the foam substrate.
[0013] The foam substrate may be any open cell foam material. In one particular aspect, the foam substrate may be a low density open cell polymeric resin foam. For example, the foam substrate may be BASOTECT® melamine resin foam available from BASF Aktiengesellschaft of Ledwigshafen am Rhein, Germany.
[0014] In one aspect, the foam substrate may be provided as a panel and may have a panel thickness. For example, the panel thickness may range from about 1 to about 3 inches. Of course, lesser or greater thicknesses may be used without departing from the scope of the present disclosure. In another aspect, the foam substrate may be provided as a block, wherein the block may be dimensioned to accommodate a specific application.
[0015] The flame-retardant solution may be an aqueous solution comprising one or more organic phosphate esters in an aqueous carrier (e.g., water). It is believed that organic phosphate esters impart the disclosed flame-retardant solution with flame-retardant properties, as is discussed herein. Optionally, in addition to organic phosphate esters, the flame-retardant solution may additionally include other flame-retardant components. An example of another flame-retardant component useful in the disclosed flame-retardant solution is an inorganic flame retardant, such as aluminum hydroxide.
[0016] The organic phosphate ester component of the disclosed flame-retardant solution may be a single organic phosphate ester or a blend of organic phosphate esters. In one aspect, the organic phosphate ester component of the disclosed flame-retardant solution may include one or more alkyl-substituted phosphate esters. In another aspect, the organic phosphate ester component of the disclosed flame-retardant solution may include multiple alkyl-substituted phosphate esters, wherein at least two of the alkyl-substituted phosphate esters have substantially different boiling or vapor points. For example, at least two of the alkyl-substituted phosphate esters in the disclosed flame-retardant solution may have a difference in boiling points of about 1O 0C.
[0017] The organic phosphate ester component of the disclosed flame-retardant solution may be obtained from commercially available flame retardants typically used in the textile industry. In one example, the organic phosphate ester component may be obtained using PYROZYL M73 available from American Manufacturing International, Inc. (Amitech) or Paterson, New Jersey. In another example, the organic phosphate ester component may be obtained using SPARTAN AR 295 available from Spartan Flame Retardants, Inc. of Crystal Lake, Illinois, which is a blend of organic and inorganic components. In yet another example, the organic phosphate ester component may be obtained using FLAMEPROOF #1528 available from Apexical, Inc. of Spartanburg, South Carolina.
[0018] In one aspect, the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.01 to about 15 percent by weight of the flame-retardant solution. In another aspect, the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.1 to about 5 percent by weight of the flame-retardant solution. In yet another aspect, the organic phosphate ester (or esters) in the disclosed flame-retardant solution may comprise about 0.1 to about 2 percent by weight of the flame-retardant solution. At this point, those skilled in the art will appreciate that the amount of the organic phosphate ester (or esters) in the disclosed flame-retardant solution may depend upon the type of organic phosphate esters used and the type of foam substrate used, among other factors.
[0019] One exemplary flame-retardant solution may be prepared by mixing 300 milliliters of PYROZYL M73 with 29.7 liters of distilled water.
[0020] At this point, those skilled in the art will appreciate that one or more additional functional additives may be included in the disclosed flame-retardant solution without departing from the scope of the present disclosure. Exemplary additional functional additives include hydrophobants (e.g., aqueous siloxane emulsions), oleophobants (e.g., perfluoroacrylate copolymer emulsions) and formaldehyde scavengers (e.g., SUMITEX BUFFER FW, available from Sumitomo Chemical Co., Ltd. of Tokyo, Japan), as well as auxiliaries such as sequestrants, buffers, levelers, dispersants and biocides.
[0021] In an alternative aspect, the disclosed flame-retardant solution may be substantially free of brominated compounds and heavy metals.
[0022] Referring again to block 14, the foam substrate may be contacted with the disclosed flame-retardant solution such that the flame-retardant solution impregnates the foam substrate (i.e., the flame-retardant solution penetrates the surface of the foam substrate and transfers into the internal cross-section). In one aspect, the flame-retardant solution may be received in a vessel, such as a tank, and the foam substrate may be immersed into the flame-retardant solution in the vessel (e.g., by dipping).
[0023] At this point, those skilled in the art will appreciate that the foam substrate may be in contact with the flame-retardant solution for a time sufficient to achieve the desired penetration and distribution of the solution into the foam. Furthermore, the temperature of the flame- retardant solution may be controlled to optimize penetration and distribution of the solution into the foam.
[0024] Optionally, the foam substrate may be mechanically deformed while in contact with the flame-retardant solution to improve penetration of the solution into the foam. One exemplary technique for mechanically deforming the foam substrate includes repeatedly compressing and relaxing the foam substrate. Another exemplary technique for mechanically deforming the foam substrate includes kneading the foam substrate.
[0025] Referring to block 16, after contacting the foam substrate with the flame-retardant solution, excess solution may be removed from the foam substrate. For example, about 90 percent of the absorbed flame-retardant solution may be removed. In one aspect, the treated foam substrate may be allowed to drip dry before proceeding to the curing step. In another aspect, the treated foam substrate may be squeezed to remove excess solution. For example, squeezing may be accomplished by passing the treated foam substrate through a nip defined by two rollers.
[0026] Optionally, after removing excess flame-retardant solution, the foam substrate may again be contacted with the flame-retardant solution, after which excess solution may be removed as discussed above. The steps shown in blocks 14 and 16 may be repeated several time to achieve the desired penetration and distribution of the flame-retardant solution in the foam substrate. For example, the steps shown in blocks 14 and 16 may be performed once for every inch of thickness of the foam substrate.
[0027] Finally, referring to block 18, the treated foam substrate may be cured. The step of curing the treated foam substrate may include maintaining the treated foam substrate at a predetermined temperature for a predetermined amount of time. Those skilled in the art will appreciate that the curing step may be performed in an oven (e.g., a batch oven or a conveyor oven) to facilitate maintaining the desired temperature. The curing oven may include a forced air feature.
[0028] In one particular aspect, the curing step may be performed in multiple phases, wherein each phase includes a specific temperature and a specific treatment time. For example, the treated foam substrate may be subjected to an initial cure at about 120 0C for about 2 hours, followed by a final cure at about 150 0C for about 30 minutes.
[0029] Accordingly, the disclosed flame propagation resistant foam may have the desired flammability characteristics, while retaining most or all of the original foam properties, including flexibility and lightweight.
[0030] Although various aspects of the disclosed flame propagation resistant foam and method have been shown and described, modifications may occur to those skilled in the art upon reading the specification. The present application includes such modifications and is limited only by the scope of the claims.

Claims

What is claimed is:
1. A method for making a flame propagation resistant foam from a foam substrate comprising the steps of: preparing a flame-retardant solution comprising an organic phosphate ester in an aqueous carrier; contacting said foam substrate with said flame-retardant solution; and after said contacting step, curing said foam substrate at a predetermined temperature for a predetermined amount of time.
2. The method of claim 1 wherein said foam substrate is an open cell polymeric resin foam substrate.
3. The method of claim 1 wherein said foam substrate includes a melamine resin foam.
4. The method of claim 1 wherein said organic phosphate ester is an alkyl-substituted phosphate ester.
5. The method of claim 1 wherein said flame-retardant solution further comprises an inorganic flame retardant.
6. The method of claim 1 wherein said inorganic flame retardant includes aluminum hydroxide.
7. The method of claim 1 wherein said flame-retardant solution further comprises at least one of a hydrophobant, an oleophobant and a formaldehyde scavenger.
8. The method of claim 1 wherein said organic phosphate ester comprises about 0.1 to about 5 percent by weight of said flame-retardant solution.
9. The method of claim 1 wherein said organic phosphate ester comprises about 0.1 to about 2 percent by weight of said flame-retardant solution.
10. The method of claim 1 wherein said contacting step includes immersing said foam substrate in a bath of said flame-retardant solution.
11. The method of claim 1 further comprising the step of mechanically deforming said foam substrate.
12. The method of claim 1 further comprising the step of squeezing said foam substrate to expel said flame-retardant solution therefrom.
13. The method of claim 1 wherein said curing step includes maintaining said foam substrate at a temperature in excess of about 100 0C for at least about 2 hours.
14. The method of claim 1 wherein said curing step includes maintaining said foam substrate at a temperature of about 120 0C for at least 2 hours and then at a temperature of about 150 0C for at least about 30 minutes.
15. A foam substrate prepared using any of the methods of claims 1 through 14.
PCT/US2010/033899 2009-06-16 2010-05-06 Flame propagation resistant foam and method WO2010147710A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10719500.0A EP2443187B1 (en) 2009-06-16 2010-05-06 Preparation of a flame propagation resistant foam
CA2764944A CA2764944C (en) 2009-06-16 2010-05-06 Flame propagation resistant foam and method
CN2010800271183A CN102459441A (en) 2009-06-16 2010-05-06 Flame propagation resistant foam and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/485,648 US9347004B2 (en) 2009-06-16 2009-06-16 Flame propagation resistant foam and method
US12/485,648 2009-06-16

Publications (1)

Publication Number Publication Date
WO2010147710A1 true WO2010147710A1 (en) 2010-12-23

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US (1) US9347004B2 (en)
EP (2) EP2443187B1 (en)
CN (1) CN102459441A (en)
CA (1) CA2764944C (en)
WO (1) WO2010147710A1 (en)

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