WO2017098484A1 - Matériaux composites fibreux - Google Patents

Matériaux composites fibreux Download PDF

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Publication number
WO2017098484A1
WO2017098484A1 PCT/IB2016/057536 IB2016057536W WO2017098484A1 WO 2017098484 A1 WO2017098484 A1 WO 2017098484A1 IB 2016057536 W IB2016057536 W IB 2016057536W WO 2017098484 A1 WO2017098484 A1 WO 2017098484A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibrous
composite material
fibrous composite
cellulose
hydrocolloidal
Prior art date
Application number
PCT/IB2016/057536
Other languages
English (en)
Inventor
Michael Windsor Symons
Original Assignee
Zetland Technologies Limited
Van Der Walt, Louis, Stephanus
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 Zetland Technologies Limited, Van Der Walt, Louis, Stephanus filed Critical Zetland Technologies Limited
Publication of WO2017098484A1 publication Critical patent/WO2017098484A1/fr

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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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C04B2111/0062—Gypsum-paper board like materials
    • 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
    • C04B2111/52—Sound-insulating materials
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention provides a method of preparing a fibrous composite material precursor composition for preparing a fibrous composite material artefact.
  • the invention also provides a fibrous composite material precursor composition.
  • the invention further provides a fibrous composite material artefact obtained from the fibrous composite material precursor composition.
  • BUILDING COMPONENTS particularly those for interior use such as ceiling boards, wall boards or tiles, are often either in the form of paper lined gypsum boards having a thickness of from about 6mm to about 12mm or in the form of autoclaved cement fiber ceiling boards having a thickness of about 4mm.
  • Gypsum products generally have densities in the range of 800 to 900 kg/m 3 and cement products in the range of 1200 to 1400 kg/m 3 . In the Applicant's experience, it is desirable for building components for interior use to have lower densities than, but comparable strength to gypsum and cement products.
  • the Applicant is further sensitive to the continuing need to beneficiate waste streams, in all contexts.
  • the Applicant seeks to provide a composite material, particularly useful as a building component, which is lightweight and is preferably produced by beneficiation of potentially problematic waste materials.
  • aqueous composition of fibrous material gypsum, and one or both of a cellulose and a hydrocolloidal substance
  • Forming the aqueous composition may be effected in a mixer.
  • the mixer may, for example, be an anti-gravity paddle mixer with contra rotating twin shaft paddles which are shaft-mounted.
  • the method may include forming a fibrous composite material artefact from the fibrous composite material by extruding the fibrous composite material precursor composition or by dispensing the fibrous composite material precursor composition onto a surface and allowing or causing it to set.
  • Setting of the fibrous composite material precursor composition may be by hydration of the gypsum.
  • the surface When dispensing the fibrous composite material precursor composition onto a surface, the surface may, for example, be provided by a moving belt.
  • Forming the fibrous composite material artefact may include applying a pattern to the fibrous composite material precursor composition such that the fibrous composite material artefact is patterned.
  • the surface onto which the fibrous composite material precursor composition may be dispensed to set may be patterned, e.g. the surface may comprise a patterned polyurethane flexible compound or a patterned room temperature vulcanized silicone rubber.
  • a pattern may be imposed on the fibrous composite material precursor composition when it has set but while it is still wet, e.g. by means of a roller that carries the pattern, and the pattern being defined on the roller in, for example, flexible polyurethane or room temperature vulcanized silicone rubber.
  • Forming the fibrous composite material artefact may include, after the fibrous composite material precursor composition has set, drying the set fibrous composite material precursor composition by temperature treatment, i.e. drying.
  • the temperature treatment may be effected at about 70°C.
  • Forming the fibrous composite material artefact may include, after temperature treatment of the set fibrous composite material precursor composition, applying an aqueous solution of a fully hydrolysed polyvinyl alcohol, preferably comprising about 5% by volume fully hydrolysed polyvinyl alcohol, to the surface of the set and temperature treated fibrous composite material precursor composition. Poval 1 17 by Kururay is preferred.
  • aqueous solution of the fully hydrolysed polyvinyl alcohol may be followed by another step of temperature treatment, preferably also at about 70°C, to dry the fully hydrolysed polyvinyl alcohol.
  • the treatment with fully hydrolysed polyvinyl alcohol provides a strong covering envelope to the artefact, which is also water insoluble after drying.
  • Forming the fibrous composite material artefact may include painting the set, temperature treated and fully hydrolysed polyvinyl alcohol-coated fibrous composite material precursor composition. Painting may be by curtain coater or roller application of paint.
  • the gypsum may be the hemi-hydrate form thereof.
  • the fibrous material may comprise material selected from one or a combination of any two or more of carpet material, textile material, monofilament glass, mineral wool, rock wool, slag wool, and insulating building material off-cuts.
  • the carpet material and the textile material may, in particular, comprise waste carpet material and waste textile material. In the case of carpet material, the backing of the carpet material may be included. Desirably, the carpet material and textile material are waste carpet material and waste textile material respectively.
  • the fibrous material may comprise lengths of the fibrous material of 30mm or less, more preferably 12mm or less. The method may include a prior step of forming larger pieces of fibrous material into such lengths of fibrous material.
  • such a prior step may be carried out in a granulator that comprises fast moving knives which are fixed to a rotating tool holder on a shaft, in which case larger pieces of carpet is sliced between the knife edges and a feed table with sieve with holes of desired size.
  • a prior step may include milling or high shear mixing in a high viscosity solution of a cellulose, as herein described, and/or a high viscosity hydrocolloidal substance, as herein described.
  • the cellulose may be selected from any one or a combination of two or more of hydroxyl ethyl cellulose, hydroxyl propyl cellulose, guar gum and xanthanum gum.
  • the hydrocolloidal substance may be a polysaccharide.
  • Forming the aqueous composition may include mixing the fibrous material and the gypsum, in dry forms, with an aqueous solution of the cellulose and/or the hydrocolloidal substance. More specifically, forming the aqueous composition may include first dispersing the gypsum in the aqueous solution of the cellulose and/or the hydrocolloidal substance, followed by mixing the fibrous material with the thus obtained composition of the aqueous solution of the cellulose and/or the hydrocolloidal substance and the gypsum. The mixture may, in each case, be evenly and uniformly blended to obtain an even and substantially uniform mixture. This also applies when mixing the foam and the aqueous composition.
  • the aqueous solution of the cellulose and/or the hydrocolloidal substance may comprise the cellulose and/or the hydrocolloidal substance in a concentration of no more than 0.5% by mass.
  • the foam may have a very small air cell size.
  • the method my include mixing the aqueous polyvinyl alcohol solution by controlled volume and pressure of compressed air, and then pumping or pressure propelling it by air into a length of piping that is coiled in a circular configuration, in which the solution is continually turning over and over to enveloping air cells, exiting the pipe as a fully aerated, micro air bubble foam.
  • the method may include directly feeding the foam, when it exits the pipe, into the aqueous composition, typically into the mixer in which the aqueous composition has been or is being formed and in which mixing then continues to blend the foam with the aqueous composition to disperse the foam intimately throughout the aqueous composition.
  • a fibrous composite material precursor composition which includes
  • a cellulose and a hydrocolloidal substance one or both of a cellulose and a hydrocolloidal substance, and a partially hydrolysed polyvinyl alcohol foam obtained by foaming a 2.5% to 5% by mass concentration of a partially hydrolysed polyvinyl alcohol solution in water.
  • aqueous composition and therefore also the fibrous material, the gypsum and the cellulose and hydrocolloidal substance, per se and as a solution, as well as the foam, may be has hereinbefore descried in accordance with the method of the invention.
  • a fibrous composite material artefact obtained by allowing or causing the fibrous composite material precursor composition to set, followed by drying the set fibrous composite material precursor composition.
  • reference numeral 10 generally indicates a process for carrying out the method of the invention.
  • the process 10 includes a continuous mixer 12, in which to prepare the fibrous composite material precursor composition of the invention.
  • the process 10 also includes a gypsum hemi-hydrate powder storage vessel 14 and a first weigh cell 16, arranged to feed gypsum hemi-hydrate powder from the storage vessel 14 into the mixer 12.
  • the process 10 further includes an aqueous cellulose solution storage vessel 17 and a first pump 18, arranged to pump aqueous cellulose solution from the storage vessel 17 into the mixer 12.
  • aqueous cellulose solution may be a hydrocolloidal substance, e.g. a polysaccharide, in aqueous solution in accordance with the invention.
  • the process 10 also includes a fibrous material storage vessel 20 and a second weigh cell 22, arranged to feed fibrous material from the storage vessel into the mixer 12.
  • the fibrous material comprises lengths of fibrous material of less than 30mm, more preferably less than 12mm.
  • the weigh cells 16, 22 and the pump 18 respectively feed gypsum hemi-hydrate powder, fibrous material and aqueous cellulose solution to the mixer 12, and the mixer 12 mixes these to provide an aqueous composition thereof in accordance with the invention.
  • the process 12 still further includes a partially hydrolysed polyvinyl alcohol aqueous solution storage vessel 24 and a second pump 26 arranged to pump partially hydrolysed polyvinyl alcohol aqueous solution from the storage vessel 24 along a sparge line 28, into which sparge line 28 a compressed air feed 30 feeds, serving to form the partially hydrolysed polyvinyl alcohol aqueous solution into a foam.
  • the process 12 also includes a third weigh cell 32 into which the sparge line 28 leads, the weigh cell 32 being arranged to feed the foam into the mixer 12. The weigh cell 32 provides for air escape.
  • foam is formed from the partially hydrolysed polyvinyl alcohol aqueous solution in the sparge line 28 by feeding air into (“sparging") the partially hydrolysed polyvinyl alcohol aqueous solution. The foam is then fed into the mixer 12 by the weigh cell 32.
  • the foam is then blended with the aqueous composition, to be evenly and uniformly dispersed throughout the aqueous composition, thereby forming a fibrous composite material precursor composition in accordance with the invention.
  • the process 12 also includes a surface pattern conveyor 34, arranged for the mixer 12 to discharge the fibrous composite material precursor composition onto an upper surface of the conveyor 34.
  • the surface pattern conveyor 34 has a surface pattern provided thereon in a polyurethane flexible compound or a room temperature vulcanized silicone rubber, thus patterning the surface of the fibrous composite material precursor composition through contact.
  • the process 12 includes a patterning roller 36 which may have a surface pattern provided thereon in a polyurethane flexible compound or a room temperature vulcanized silicone rubber, the roller 36 being arranged to apply patterning to an exposed surface of fibrous composite material precursor composition.
  • the fibrous composite material precursor composition sets on the conveyor due to gypsum hydration.
  • the process 12 also includes a cutting device 38, arranged to cut the fibrous composite material precursor composition, once it has set on the conveyor 34, into pieces.
  • the conveyor 34 is followed by a trolley stack 40 on which pieces of set fibrous composite material precursor composition are discharged.
  • the process 12 further includes a drying chamber 42, in which pieces of set fibrous composite material precursor composition discharged on to the trolley stack 40 are subjected to drying, thereby to obtain pieces, or artefacts, of fibrous composite material, i.e. dried and set fibrous composite material precursor composition.
  • the drying chamber 42 is followed by a cut and profiling stage 44 in the fibrous composite material is subjected to desired cutting and profiling.
  • the cut and profiling stage 44 is, in turn, followed by a fully hydrolysed polyvinyl alcohol aqueous solution treatment stage 46, in which fully hydrolysed polyvinyl alcohol aqueous solution is applied to the cut and profiled pieces of fibrous composite material.
  • the stage 46 includes a fully hydrolysed polyvinyl alcohol aqueous solution storage vessel 48 and a spray device 50 arranged to deliver fully hydrolysed polyvinyl alcohol aqueous solution from the storage vessel 48 onto the cut and profiled fibrous composite material by spraying.
  • the process 12 still further, includes a first flash dryer 52 in which the pieces fibrous composite material, after treatment with the fully hydrolysed polyvinyl alcohol aqueous solution, is subjected to flash drying.
  • the process 12 also includes a painting stage 54, in which the pieces of fibrous composite material are painted, e.g. by roller or curtain coaster painting.
  • the painting stage 54 is followed by a second flash dryer 56, in which the paint is dried.
  • the flash dryer 56 discharges to a packing an dispatch stage 58.
  • the exemplary fibrous composite material precursor composition was formed into a fibrous composite material artefact, in the form of a tile having dimensions of 580 x 580 x 17mm.
  • Polyvinyl alcohol as a binder has a number of unique properties, which include some of the following:
  • the film has good tear strength as well as elongation at break.
  • the partially hydrolysed grades have a higher elongation at break than the fully hydrolysed grades which are more rigid. This allows for choice depending on the application, such as resistance to shock.
  • the film has high gas impermeability and resistance to organic solvents and yet still retains high moisture permeability. This is a unique benefit in the method of the invention where rapid drying is needed, and the aggregated material has imposed upon it a strong peripheral or surface film.
  • the different grades allow a wide spectrum of choice.
  • the partially hydrolysed grades such as Mowiol 18/88, 23/88 and 26/88 by Clariant and G- types by Nippon Gohsei such as GH17 to GH22, have the property of good foaming capability, as is also the case of Poval 217 by Kururay.
  • the polyvinyl alcohols have increasing tensile strength with increasing degree of polymerization and molecular weight.
  • the partially hydrolysed grades, at a given concentration in water, have a lower viscosity than the fully hydrolysed or saponified types. There is therefore an ideal molecular weight range at the acceptable concentration levels suitable for the invention. These are Mowiol grades 18/88, 23/88 and 26/88 by Clariant and the G-types GM14 and GH17 to GH22 by Nippon Gohsei and in the fully hydrolysed or saponified grades, Mowiol 20/98 by Clariant and Poval 1 17 by Kururay. Fibrous Material
  • Carpets suitably milled for fibre loosening and separation from the substrate, as well as cutting to the length of the substrate itself, releases fibres of a very high aspect ratio and of excellent mechanical strength, such as polyester, polyethylene teraphthalate, acrylic nylon, polyvinyl alcohol and polypropylene.
  • the foamed gypsum carrier slurry i.e. when the fibrous material is admixed with the gypsum, the cellulose or hydrocolloidal substance and the foam) then contributes a low density aerated matrix, binds the composite, imparts a zero surface spread of flame, allows the incorporation of a surface pattern, texture or profile or, alternatively, a smooth surface as a function of the production process control imposed.
  • Inorganic fibre such as monofilament glass, or rockwool, mineral wool or slag wool on the other hand are incombustible, more rigid, more easily truncated or reduced in length in or by process. These are included as possible fibrous materials in accordance with the invention.
  • Gypsum is abundant from flue gas desulphurization of effluent combustion gases in coal fired power stations. It is recovered at up to 96% pure calcium sulphate dihydrate CaS0 4 .2H 2 0.
  • Hydration or set point can be advanced or retarded, such as by add mixing a 2 to 6% solution of a sodium acrylamide. Lengthening the time to set point or retardation in excess can negatively influence properties. Crystals of hydrated gypsum act as an accelerator of hydration. Continuous production in clean equipment and thorough washing between shifts is very important.
  • Gypsum is a low cost binder and its calcination requires only a fraction of the energy required in Portland cement which reaches peak temperatures in the range of 1450°C with considerable release of carbon dioxide from the fuel used.
  • - Gypsum behaves very well in fire, in which it decomposes endothermally and releases water of hydration which on evaporation takes its latent heat of vaporization or evaporation from the composite body, in this way acting as a coolant, preventing too rapid heat transfer through the composite.
  • Exfoliated vermiculite as an extender of volume contributes a degree of refractoriness, and can be useful as a constituent of the composition.
  • the celluloses of high viscosity and molecular weight and certain hydrocolloidal polysaccharides are used in very low concentration in the gauging water. A 0.5% or lower concentration is typical, as indicated above. Hydroxyl ethyl or hydroxyl propyl cellulose, or even gums such as xanthum or guar, are examples respectively and fall within the scope of the invention, being specific examples of suitable celluloses.
  • the increase in viscosity increases mixing shear while minimizing the coalescence of the micro air cells or bubbles in the foamed partially hydrolysed polyvinyl alcohol solution during the foam to fibrous slurry blending.
  • the Applicant identified a need for lightweight, high strength building components, specifically wall boards, of densities in the range of 180 to 350 kg/m 3 or up to 500 kg/m 3 , which is significantly lower than that of presently existing building components of which the Applicant is aware.
  • the Applicant believes that the present invention addresses this need.
  • the Applicant believes that it is advantageous for building components, and particularly wall boards to be fibrous, to exhibit good acoustic and strength properties. It is furthermore advantageous for such boards to be aerated to improve thermal insulation and to promote the density range required, that are easy to cut or nail, easily decorated, and may have visible surfaces that are either smooth and continuous or that may have decorative profiles or patterned surfaces.
  • the invention is capable of beneficiating waste materials such as waste carpets and waste textiles is regarded as being a prominent advantage of the invention, and is in fact a preferred embodiment thereof. These waste materials do not decompose in landfills and occupy excessive volume. This also applies to, monofilament glass, mineral wool, rock wool or slag wool waste from manufacture, or off-cuts or replacement of insulation on building sites or building demolition or alteration.
  • the invention also impressively provides for beneficiation of waste from flue gas desulphurization at power stations and from some manufacturing processes, in the form of gypsum, which is calcium sulphate dyhydrate, which is calcined to produce the hemi-hydrate form.
  • gypsum which is calcium sulphate dyhydrate, which is calcined to produce the hemi-hydrate form.
  • this form of gypsum acts as a hydraulic binder and performs admirably in fire.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

L'invention concerne un procédé de préparation d'une composition de précurseur de matériau composite fibreux pour préparer un matériau composite fibreux artefact. Le procédé consiste à former une composition aqueuse constituée de matière fibreuse, de gypse et de cellulose ou/et d'une substance hydrocolloïdale. Le procédé consiste également à générer une mousse par expansion de 2,5 à 5 % de concentration en masse d'une solution d'alcool polyvinylique partiellement hydrolysé dans l'eau. La mousse est introduite dans la composition aqueuse, ce qui permet d'obtenir la composition de précurseur de matériau composite fibreux.
PCT/IB2016/057536 2015-12-11 2016-12-12 Matériaux composites fibreux WO2017098484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2015/09040 2015-12-11
ZA201509040 2015-12-11

Publications (1)

Publication Number Publication Date
WO2017098484A1 true WO2017098484A1 (fr) 2017-06-15

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WO (1) WO2017098484A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613627A (en) * 1982-12-13 1986-09-23 Usg Acoustical Products Company Process for the manufacture of shaped fibrous products and the resultant product
US5395571A (en) * 1991-08-30 1995-03-07 Plascon Technologies (Proprietary) Limited Method of making a building board
WO2001014284A1 (fr) * 1999-08-25 2001-03-01 Balmoral Technologies (Proprietary) Limited Procede de fabrication d'un produit mousse a base de liant hydraulique
WO2001070647A1 (fr) * 2000-03-22 2001-09-27 Balmoral Technologies (Pty) Ltd Procede de production d'une mousse de liant hydraulique
US6488761B1 (en) * 1997-11-28 2002-12-03 Windsor Technologies Limited Hydraulic hardened foamed product and a method of producing the same
US20030125405A1 (en) * 2001-09-03 2003-07-03 Hilton Dennis M. Foamed fireproofing composition and method
US20040061098A1 (en) * 2001-09-03 2004-04-01 Hilton Dennis M. Foamed fireproofing composition and method
WO2006012651A2 (fr) * 2004-07-27 2006-02-02 Tower Technology Holdings (Pty) Ltd Produit liant hydraulique
US20090312448A1 (en) * 2006-07-19 2009-12-17 Tower Technology Holdings (Pty) Ltd. Method of agglomeration

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613627A (en) * 1982-12-13 1986-09-23 Usg Acoustical Products Company Process for the manufacture of shaped fibrous products and the resultant product
US5395571A (en) * 1991-08-30 1995-03-07 Plascon Technologies (Proprietary) Limited Method of making a building board
US6488761B1 (en) * 1997-11-28 2002-12-03 Windsor Technologies Limited Hydraulic hardened foamed product and a method of producing the same
WO2001014284A1 (fr) * 1999-08-25 2001-03-01 Balmoral Technologies (Proprietary) Limited Procede de fabrication d'un produit mousse a base de liant hydraulique
WO2001070647A1 (fr) * 2000-03-22 2001-09-27 Balmoral Technologies (Pty) Ltd Procede de production d'une mousse de liant hydraulique
US20030125405A1 (en) * 2001-09-03 2003-07-03 Hilton Dennis M. Foamed fireproofing composition and method
US20040061098A1 (en) * 2001-09-03 2004-04-01 Hilton Dennis M. Foamed fireproofing composition and method
WO2006012651A2 (fr) * 2004-07-27 2006-02-02 Tower Technology Holdings (Pty) Ltd Produit liant hydraulique
US20080060546A1 (en) * 2004-07-27 2008-03-13 Tower Technology Holdings (Pty) Ltd. Hydraulic Binder Product
US20090312448A1 (en) * 2006-07-19 2009-12-17 Tower Technology Holdings (Pty) Ltd. Method of agglomeration

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