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WO1993021995A1 - Coated products - Google Patents

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Publication number
WO1993021995A1
WO1993021995A1 PCT/GB1993/000901 GB9300901W WO9321995A1 WO 1993021995 A1 WO1993021995 A1 WO 1993021995A1 GB 9300901 W GB9300901 W GB 9300901W WO 9321995 A1 WO9321995 A1 WO 9321995A1
Authority
WO
WIPO (PCT)
Prior art keywords
substrate
polymer latex
coating
fire blanket
slurry
Prior art date
Application number
PCT/GB1993/000901
Other languages
French (fr)
Inventor
Michael Paul
Original Assignee
Courtaulds Aerospace Limited
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
Priority claimed from GB929209388A external-priority patent/GB9209388D0/en
Priority claimed from GB929221811A external-priority patent/GB9221811D0/en
Application filed by Courtaulds Aerospace Limited filed Critical Courtaulds Aerospace Limited
Publication of WO1993021995A1 publication Critical patent/WO1993021995A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C8/00—Hand tools or accessories specially adapted for fire-fighting, e.g. tool boxes
    • A62C8/06—Fire-blankets
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/483—Polyacrylates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0022—Glass fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2205/00—Condition, form or state of the materials
    • D06N2205/02—Dispersion
    • D06N2205/023—Emulsion, aqueous dispersion, latex
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D06N2209/067—Flame resistant, fire resistant

Definitions

  • fire blanket relates to fire resistant fabrics suitable for use as fire blankets, fire barriers, fire stops, fire barriers for cavity walls or smoke blankets and methods of manufacturing the same.
  • fire blanket will be taken to include all the aforementioned products where the context permits.
  • prior known fire blanket comprises a flexible glass fibre fabric which is coated on each side with polytetrafluoroethylene (PTFE) , and blends of PTFE and fluoroelastomers or silicone elastomers (see for example, O-A-90/15898) .
  • PTFE polytetrafluoroethylene
  • fluoroelastomers or silicone elastomers see for example, O-A-90/15898 .
  • these prior known fabrics are very effective and ideally suited for industrial applications which also require a hard wearing robust product.
  • these fabrics are very expensive.
  • Chip pan fires that is to say fires caused by boiling oil or fat spilling over and igniting when cooking chipped potatoes or the like
  • Chip pan fires present further problems. It is not simply good enough to cover the flames to snuff out the fire, the blanket has to prevent combustible vapour permeating through the blanket and igniting on the side of the blanket remote from the burning oil or fat.
  • the fire blanket has to be flexible enough to drape completely over the flaming pan of oil or fat to exclude air from reaching the flames.
  • One aim of the present invention is to provide a fire blanket which is cheap and is effective at controlling fires.
  • a fire blanket comprises a flexible substrate coated on both faces with a coating comprising refractory inorganic particles embedded in an organic matrix of polymer latex.
  • a method of manufacturing a fire blanket comprising the steps of providing a flexible substrate applying to both sides of the substrate an aqueous slurry comprising inorganic refractory particles suspended in a polymer latex binder, and drying the slurry to form a coating of said particles embedded in an organic matrix of polymer latex on both sides of the substrate.
  • the polymer latex is selected to cross-link fully under alkaline conditions.
  • the inorganic particles can be one or more of cement, gypsum, plaster and sand.
  • Figure 1 shows schematically a cross-sectional view of a fire blanket constructed in accordance with the present invention
  • Figure 2 shows schematically apparatus for coating a fabric to make a fire blanket which is constructed in accordance with the present invention.
  • a fire blanket 9 comprises a knitted, woven or non-woven glass fibre substrate 10 coated on each face of the fabric with a coating 11 which comprises a mixture of inorganic refractory particles, such as, for example cement particles in an organic matrix of polymer latex such as, for example an acrylic latex binder.
  • inorganic refractory particles such as, for example cement particles in an organic matrix of polymer latex such as, for example an acrylic latex binder.
  • the preferred substrate 10 is made of glass fibre and can be made in a wide range of types and weights of material.
  • the glass fibre substrate may be a knitted, woven, or non-woven fabric, or mat, or scrim or a network of fibres such as a netting.
  • the fibres in the substrate should not be so widely spaced apart that it is difficult to form a coherent coating on the substrate, since the purpose of the coating is to provide a layer which is impenetrable by fire.
  • the preferred substrates are woven glass fibre fabrics.
  • the substrate may be made of other types of non- combustible, or low combustibility fibres, such as for example, an aromatic polyamide (eg. para-aramids such as Kevlar (trade mark of Du Pont Limited) , Twaron (trade mark of Enka Limited) or Technora (trade mark of Teijin Limited) or meta-aramids such as Nomex (trade mark of Du Pont Limited or Konex (trade mark of Teijin Ltd.), silica fibres, or polybenzimidazole (PBI) fibres.
  • aromatic polyamide eg. para-aramids such as Kevlar (trade mark of Du Pont Limited) , Twaron (trade mark of Enka Limited) or Technora (trade mark of Teijin Limited) or meta-aramids such as Nomex (trade mark of Du Pont Limited or Konex (trade mark of Teijin Ltd.), silica fibres, or polybenzimidazole (PBI) fibres.
  • para-aramids such as Kevlar (trade mark
  • the substrate to be coated is passed through a coroniser set at between 550 * C and 625'C.
  • the coroniser comprises a flame heated oven and is used to relax the glass fibres and set the crimp of the glass fibres, thus producing a more flexible fabric.
  • the coroniser also removes the size which is applied to the fibres to leave the fibres with thoroughly clean anionic surface.
  • the substrate is precoated with a thin layer of a cationic acrylic latex which will cross-link under alkaline conditions.
  • a cationic acrylic latex which will cross-link under alkaline conditions.
  • a suitable cationic acrylic latex is that sold by Rohm & Haas under the trade mark Primal Le 1126.
  • the precoat acrylic latex is dried at a temperature of between 120 to 130 * C which is below that at which the acrylic polymer will fully cross-link.
  • the precoat being cationic, bonds well to the anionic glass fibres but provides flexibility of bond as well.
  • the coating 11 is then applied to the precoat using the apparatus shown in Figure 2.
  • the apparatus comprises a tank 12 in which a slurry 12a is contained.
  • the preferred slurry is an aqueous slurry comprising cement particles mixed with an acrylic polymer latex (60% solids) and if desired contains an inhibitor, such as sodium citrate, to delay hydration of the cement for long enough to enable the slurry to be applied to the fabric 10.
  • the fabric 10 to be coated is pulled off a supply reel 14, drawn through the slurry 12a and passed between rods or rollers 13 each spaced a predetermined distance from the confronting surface of the fabric 10.
  • the slurry coatings 11 picked up on the fabric 10 are each effectively spread by the respective rods or rollers 13 to form a given weight of coatings on the fabric.
  • the weight of coatings may range from 120 g/m 2 to 300 g/m 2 .
  • the coating 11 is applied to the precoated substrate as an aqueous slurry comprising
  • the acrylic latex binder is a cationic acrylic latex which will cross-link in alkaline conditions and can be the same material as used for the precoat.
  • composition of the dried coating 11 obtained from a slurry comprising 18% acrylic latex binder, about 0.1% sodium citrate and 47% cement particles is 13.2% (by weight) binder, 0.3% sodium citrate, 86.5% cement particles.
  • the coated fabric is then passed through a heating zone 15 which may be a conventional oven, or include infrared heaters, or hot air dryers, where the coated fabric is heated to a temperature of the order of 170 to 200 * C to cross-link the acrylic polymer. Following heating, the coated fabric is wound up on a second reel 16.
  • a heating zone 15 which may be a conventional oven, or include infrared heaters, or hot air dryers, where the coated fabric is heated to a temperature of the order of 170 to 200 * C to cross-link the acrylic polymer.
  • the coated fabric is wound up on a second reel 16.
  • the speed of the fabric through the apparatus is controlled so as to ensure that with heavy weight coatings, for example, 300 g/m 2 , the coatings 11 are completely dry before rolling up on the reel 16.
  • Lighter coatings eg 120 g/m 2 can be processed faster than heavy weight coatings when using the same heating zone 15.
  • a fire retardant is added to the slurry to prevent the coating catching fire.
  • a suitable fire retardant is that known by the trade mark Calaban FRP 44 (manufactured by White Chemical Corporation of New Jersey USA) .
  • the fire retardant is added to the slurry providing that there is at least 10% (by weight) of binder present in the slurry.
  • a suitable aqueous slurry comprises 18.9% by weight binder, 9.4% by weight fire retardant, 0.24% sodium citrate, and 47.2% cement particles.
  • the content of fire retardant may vary from 6 to 10% by weight in the slurry.
  • the preferred inorganic particles are cement particles.
  • other inorganic particles could be used such as, for example, gypsum, plaster or sand.
  • inhibitors could be used to delay hydration for a sufficient length of time to permit easy coating of the substrates by a dipping technique.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Inorganic Chemistry (AREA)
  • Public Health (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

A fire blanket (9) comprises a flexible substrate made, for example, from a woven glass fibre fabric (10) coated on both faces with a fire resistant coating (11). Each coating (11) comprises particles of cement, or plaster, or gypsum or sand embedded in an organic matrix of latex polymer. The preferred matrix is a cationic acrylic polymer latex which will cross-link under alkaline conditions. A method of manufacturing the fire blanket is also disclosed.

Description

COATED PRODUCTS.
Background of the Invention
1. Field of the Invention
This invention relates to fire resistant fabrics suitable for use as fire blankets, fire barriers, fire stops, fire barriers for cavity walls or smoke blankets and methods of manufacturing the same. Hereinafter the term "fire blanket" will be taken to include all the aforementioned products where the context permits.
2. Description of the Related Art
One form of prior known fire blanket comprises a flexible glass fibre fabric which is coated on each side with polytetrafluoroethylene (PTFE) , and blends of PTFE and fluoroelastomers or silicone elastomers (see for example, O-A-90/15898) . In general, these prior known fabrics are very effective and ideally suited for industrial applications which also require a hard wearing robust product. However, these fabrics are very expensive.
With increased awareness of the need to improve fire safety in the home, safety regulations have become more stringent. In particular, in the United Kingdom, the need to comply with British Safety Standard BS 6575, means that low cost untreated glass fibre fabrics, and other known low cost products currently used will no longer meet the new minimum fire resistance requirements. The same applies in other countries which have stringent safety standards.
There is therefore a need for a low cost fire blanket for home use which is effective at snuffing-out chip pan fires and the like, without giving off toxic fumes. Chip pan fires (that is to say fires caused by boiling oil or fat spilling over and igniting when cooking chipped potatoes or the like) present further problems. It is not simply good enough to cover the flames to snuff out the fire, the blanket has to prevent combustible vapour permeating through the blanket and igniting on the side of the blanket remote from the burning oil or fat.. In addition, the fire blanket has to be flexible enough to drape completely over the flaming pan of oil or fat to exclude air from reaching the flames.
One aim of the present invention is to provide a fire blanket which is cheap and is effective at controlling fires.
Summary of the Invention According to one aspect of the invention a fire blanket comprises a flexible substrate coated on both faces with a coating comprising refractory inorganic particles embedded in an organic matrix of polymer latex.
According to a further aspect of the present invention there is provided a method of manufacturing a fire blanket comprising the steps of providing a flexible substrate applying to both sides of the substrate an aqueous slurry comprising inorganic refractory particles suspended in a polymer latex binder, and drying the slurry to form a coating of said particles embedded in an organic matrix of polymer latex on both sides of the substrate. Desirably the polymer latex is selected to cross-link fully under alkaline conditions.
The inorganic particles can be one or more of cement, gypsum, plaster and sand.
Brief Description of the Drawing
The invention will now be described, by way of example, with reference to the accompanying drawing, in which:
Figure 1 shows schematically a cross-sectional view of a fire blanket constructed in accordance with the present invention, and Figure 2 shows schematically apparatus for coating a fabric to make a fire blanket which is constructed in accordance with the present invention.
Description of Preferred Embodiment Referring to Figure 1 a fire blanket 9 comprises a knitted, woven or non-woven glass fibre substrate 10 coated on each face of the fabric with a coating 11 which comprises a mixture of inorganic refractory particles, such as, for example cement particles in an organic matrix of polymer latex such as, for example an acrylic latex binder.
The preferred substrate 10 is made of glass fibre and can be made in a wide range of types and weights of material. For example the glass fibre substrate may be a knitted, woven, or non-woven fabric, or mat, or scrim or a network of fibres such as a netting. Ideally the fibres in the substrate should not be so widely spaced apart that it is difficult to form a coherent coating on the substrate, since the purpose of the coating is to provide a layer which is impenetrable by fire. The preferred substrates are woven glass fibre fabrics.
The substrate may be made of other types of non- combustible, or low combustibility fibres, such as for example, an aromatic polyamide (eg. para-aramids such as Kevlar (trade mark of Du Pont Limited) , Twaron (trade mark of Enka Limited) or Technora (trade mark of Teijin Limited) or meta-aramids such as Nomex (trade mark of Du Pont Limited or Konex (trade mark of Teijin Ltd.), silica fibres, or polybenzimidazole (PBI) fibres.
It may be possible to make the substrate from combustible fibres (eg. polyester fibres) but such a substrate would have to rely heavily on complete integrity of the coating on at least one side thereof in the event of fire. The preferred method of construction is as follows. The substrate to be coated is passed through a coroniser set at between 550*C and 625'C. The coroniser comprises a flame heated oven and is used to relax the glass fibres and set the crimp of the glass fibres, thus producing a more flexible fabric. The coroniser also removes the size which is applied to the fibres to leave the fibres with thoroughly clean anionic surface.
To provide a good bond between the substrate 10 and each coating 11, the substrate is precoated with a thin layer of a cationic acrylic latex which will cross-link under alkaline conditions. Most acrylic latex polymers will
.only cross-link in acidic conditions and are unsuitable. A suitable cationic acrylic latex is that sold by Rohm & Haas under the trade mark Primal Le 1126. The precoat acrylic latex is dried at a temperature of between 120 to 130*C which is below that at which the acrylic polymer will fully cross-link. The precoat being cationic, bonds well to the anionic glass fibres but provides flexibility of bond as well.
The coating 11 is then applied to the precoat using the apparatus shown in Figure 2.
The apparatus comprises a tank 12 in which a slurry 12a is contained. The preferred slurry is an aqueous slurry comprising cement particles mixed with an acrylic polymer latex (60% solids) and if desired contains an inhibitor, such as sodium citrate, to delay hydration of the cement for long enough to enable the slurry to be applied to the fabric 10. The fabric 10 to be coated is pulled off a supply reel 14, drawn through the slurry 12a and passed between rods or rollers 13 each spaced a predetermined distance from the confronting surface of the fabric 10. The slurry coatings 11 picked up on the fabric 10 are each effectively spread by the respective rods or rollers 13 to form a given weight of coatings on the fabric. The weight of coatings may range from 120 g/m2 to 300 g/m2.
In the preferred embodiment, the coating 11 is applied to the precoated substrate as an aqueous slurry comprising
45 to 60% by weight of Portland cement particles, about 0.1% by weight of sodium citrate, and 12% to 19% acrylic latex binder.
The acrylic latex binder is a cationic acrylic latex which will cross-link in alkaline conditions and can be the same material as used for the precoat.
Different mixtures of binder and inorganic refractory particles have been tried but with varying success. For example coatings made from a slurry comprising 60 parts by weight of acrylic latex (60% solids) and 150 parts by weight cement particles (100% solids) in water were found to withstand flexing without cracking.
The composition of the dried coating 11 obtained from a slurry comprising 18% acrylic latex binder, about 0.1% sodium citrate and 47% cement particles is 13.2% (by weight) binder, 0.3% sodium citrate, 86.5% cement particles.
The coated fabric is then passed through a heating zone 15 which may be a conventional oven, or include infrared heaters, or hot air dryers, where the coated fabric is heated to a temperature of the order of 170 to 200*C to cross-link the acrylic polymer. Following heating, the coated fabric is wound up on a second reel 16.
The speed of the fabric through the apparatus is controlled so as to ensure that with heavy weight coatings, for example, 300 g/m2 , the coatings 11 are completely dry before rolling up on the reel 16. Lighter coatings, eg 120 g/m2 can be processed faster than heavy weight coatings when using the same heating zone 15. In a further embodiment of the invention, a fire retardant is added to the slurry to prevent the coating catching fire.
A suitable fire retardant is that known by the trade mark Calaban FRP 44 (manufactured by White Chemical Corporation of New Jersey USA) .
The fire retardant is added to the slurry providing that there is at least 10% (by weight) of binder present in the slurry. A suitable aqueous slurry comprises 18.9% by weight binder, 9.4% by weight fire retardant, 0.24% sodium citrate, and 47.2% cement particles.
The content of fire retardant may vary from 6 to 10% by weight in the slurry.
In the above embodiments the preferred inorganic particles are cement particles. However, other inorganic particles could be used such as, for example, gypsum, plaster or sand. In the case of hydratable particles, inhibitors could be used to delay hydration for a sufficient length of time to permit easy coating of the substrates by a dipping technique.

Claims

1. A fire blanket comprising a flexible substrate coated on both faces with a coating, wherein the coating comprises refractory inorganic particles embedded in an organic matrix of polymer latex.
2. A fire blanket according to claim 1, wherein the inorganic particles are one or more of cement, gypsum, plaster and sand.
3. A fire blanket according to claim 2, wherein the organic matrix comprises an acrylic polymer latex which will cross-link in alkaline conditions.
4. A fire blanket according to claim 3, wherein the acrylic polymer latex is a cationic latex.
5. A fire blanket according to claim 1, wherein the substrate is constructed from fibres selected from the group consisting of glass, aromatic polyamide, silica and polybenzimidazole.
6. A fire blanket according to claim 5, wherein the substrate comprises a fabric of knitted, woven, or non-woven fibres.
7. A fire blanket according to claim 5, wherein the substrate comprises a mat or sheet of fibres.
8. A fire blanket according to claim 5, wherein the substrate comprises a scrim or network of fibres.
9. A fire blanket according to claim 3, wherein the substrate is coated with a first coating comprising an acrylic polymer latex which will cross-link under alkaline conditions and a second coating, applied to the first coating, which second coating comprises the inorganic particles embedded in the organic matrix of polymer latex.
10. A method of manufacturing a fire blanket comprising the steps of providing a flexible substrate and applying a coating to both sides of the substrate, wherein an aqueous slurry comprising inorganic refractory particles suspended in a polymer latex binder is applied to both sides of the substrate, and the slurry is dried to form a coating of said particles embedded in an organic matrix of polymer latex on both sides of the substrate.
li. A method according to claim 10, wherein the substrate comprises fibres fabricated into a fabric, said fibres being selected from the group consisting of glass aromatic polyamide, silica and polybenzimidazole.
12. A method according to claim 10, wherein the inorganic particles are selected from the group of materials consisting of cement, plaster, gypsum and sand.
13. A method according to claim 10, wherein the inorganic particles are of a material which will hydrate and the slurry contains an inhibitor which will delay the hydration of the particles for sufficient time for enable the slurry to be applied to the substrate by dipping.
14. A method according to claim 13, wherein the inhibitor is sodium citrate.
15. A method according to claim 10, wherein the substrate is coated with a precoat comprising an acrylic polymer latex which will cross-link under alkaline conditions and the precoat is dried by heating it to a temperature below that at which the acrylic polymer will fully cross-link.
16. A method according to claim 10, wherein the organic matrix comprises an acrylic polymer latex which will cross-link under alkaline conditions, and the slurry is applied to the precoated substrate and subsequently heated to a temperature at which the acrylic polymer latex will cross-link.
5 17. A method according to claim 15, wherein the precoat is dried at a temperature in the range of 120"C to 130'C.
18. A method according to claim 17, wherein the slurry is dried by heating it to a temperature in the range of
10 170'C to 200°C to cause cross-linking of the acrylic polymer latex.
19. A method according to claim 11, wherein the organic matrix of the slurry contains a fire retardant to protect the organic matrix from combustion in the final
15 product.
PCT/GB1993/000901 1992-04-30 1993-04-29 Coated products WO1993021995A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9209388.9 1992-04-30
GB929209388A GB9209388D0 (en) 1992-04-30 1992-04-30 Cemented coated products
GB9221811.4 1992-10-16
GB929221811A GB9221811D0 (en) 1992-10-16 1992-10-16 Cement coated products

Publications (1)

Publication Number Publication Date
WO1993021995A1 true WO1993021995A1 (en) 1993-11-11

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Application Number Title Priority Date Filing Date
PCT/GB1993/000901 WO1993021995A1 (en) 1992-04-30 1993-04-29 Coated products

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Country Link
AU (1) AU4268093A (en)
WO (1) WO1993021995A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718176A1 (en) * 1994-04-05 1995-10-06 Porcher Textile Opaque wall covering for decoration e.g. for a carpet, etc.
EP0963772A3 (en) * 1998-06-09 2001-02-07 Horst Wustinger Process for the recovery of at least one solid phase from a single or multi-component system
US6749920B1 (en) * 1996-11-12 2004-06-15 Awi Licensing Company High solids, low shrinkage coating
AU2001232085B2 (en) * 2000-02-14 2004-06-24 Walter Kidde Portable Equipment, Inc. Fire blanket

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228917A3 (en) * 1973-05-07 1974-12-06 Gruenau Gmbh Chem Fab
US4396661A (en) * 1981-08-20 1983-08-02 Subtex, Inc. Refractory coated and dielectric coated flame resistant insulating fabric composition
WO1986001195A1 (en) * 1984-08-08 1986-02-27 Delphic Research Laboratories, Inc. Fire barrier plywoods
EP0300708A1 (en) * 1987-07-16 1989-01-25 Springs Industries Inc. Coated fire barriers for upholstered furnishings
US4803897A (en) * 1987-09-18 1989-02-14 General Electric Company Drive system for track-laying vehicles
US5102726A (en) * 1990-04-03 1992-04-07 Gabbay Jeffrey S S Flexible composite laminate comprising a textile substrate, cementitious layer and sealing layer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228917A3 (en) * 1973-05-07 1974-12-06 Gruenau Gmbh Chem Fab
US4396661A (en) * 1981-08-20 1983-08-02 Subtex, Inc. Refractory coated and dielectric coated flame resistant insulating fabric composition
WO1986001195A1 (en) * 1984-08-08 1986-02-27 Delphic Research Laboratories, Inc. Fire barrier plywoods
EP0300708A1 (en) * 1987-07-16 1989-01-25 Springs Industries Inc. Coated fire barriers for upholstered furnishings
US4803897A (en) * 1987-09-18 1989-02-14 General Electric Company Drive system for track-laying vehicles
US5102726A (en) * 1990-04-03 1992-04-07 Gabbay Jeffrey S S Flexible composite laminate comprising a textile substrate, cementitious layer and sealing layer

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Title
CHEMICAL ABSTRACTS, vol. 110, no. 11, 29 May 1989, Columbus, Ohio, US; abstract no. 194261u, T. ITAYA ET AL. page 60 ; *
CHEMICAL ABSTRACTS, vol. 113, no. 14, 1 October 1990, Columbus, Ohio, US; abstract no. 120005d, H. KAKIMOTO ET AL. page 300 ; *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2718176A1 (en) * 1994-04-05 1995-10-06 Porcher Textile Opaque wall covering for decoration e.g. for a carpet, etc.
US6749920B1 (en) * 1996-11-12 2004-06-15 Awi Licensing Company High solids, low shrinkage coating
EP0963772A3 (en) * 1998-06-09 2001-02-07 Horst Wustinger Process for the recovery of at least one solid phase from a single or multi-component system
AU2001232085B2 (en) * 2000-02-14 2004-06-24 Walter Kidde Portable Equipment, Inc. Fire blanket
US6983805B2 (en) 2000-02-14 2006-01-10 Walter Kidde Portable Equipment, Inc. Fire blanket

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