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EP0045744A1 - Composition resistante a la chaleur - Google Patents

Composition resistante a la chaleur

Info

Publication number
EP0045744A1
EP0045744A1 EP80901958A EP80901958A EP0045744A1 EP 0045744 A1 EP0045744 A1 EP 0045744A1 EP 80901958 A EP80901958 A EP 80901958A EP 80901958 A EP80901958 A EP 80901958A EP 0045744 A1 EP0045744 A1 EP 0045744A1
Authority
EP
European Patent Office
Prior art keywords
composition
silicate
fibrous vegetable
thermally insulating
heat resistant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80901958A
Other languages
German (de)
English (en)
Inventor
Maurice Dixon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CROSBY DOORS Ltd
Original Assignee
CROSBY DOORS Ltd
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 CROSBY DOORS Ltd filed Critical CROSBY DOORS Ltd
Publication of EP0045744A1 publication Critical patent/EP0045744A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • 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

  • This invention relates to heat resistant and thermally insulating compositions.
  • a heat-resistant, thermally insulating composition comprising organic filler, a silicate binder, raw perlite and inorganic filler other than raw perlite.
  • the materials are chosen so as to give rise to a composition which is light weight and can be manufactured in slab form for use as, for instance, cores for doors and panels.
  • the composition can also be moulded into virtually any shape.
  • the door core firmly gripping the door frame thereby avoiding any possibility of the core falling out of the frame, which is a frequent occurrence in the case of previously known fire doors.
  • the intumescence of the perlite increases the thickness of the core so improving thermal insulation of the core.
  • the organic component in the core will burn out on that side of the core adjacent the fire so that the overall result, in the case, for instance, when the organic component is expanded polystyrene or wood chips, is an expanded honey-comb matrix on one side merging into the original composition on the other side of the door, the expanded honey-comb matrix providing a highly effective heat-resistant structure.
  • a heat-resistant, thermally insulating composition comprising fibrous vegetable matter, a silicate binder, raw perlite and inorganic filler other than raw perlite, the fibrous vegetable matter being in the form of strands having lengths in the range of from 5 to 100 mm and a water content of from 10 to 20%.
  • the first aspect of the present invention also provides a method for making a composition in accordance with the first aspect of the present invention, a method including the steps of comminuting fibrous vegetable material to form strands of said material having lengths of from 5 to 100 mm, controlling the water content of said fibrous vegetable material to from 10 to 20% by weight, forming an aqueous slurry of said fibrous vegetable material, a silicate binder, raw perlite and inorganic filler other than raw perlite and in which the silicate is present at least partially in a dissolved form, and allowing the slurry to set.
  • a preferred fibrous vegetable material is a sugar cane residue. Accordingly this material may wholly or partially replace the polystyrene, wood chips., or other organic material mentioned specifically in our above mentioned co-pending patent application . It is found that sugar cane waste does not burn out in the same way as expanded polystyrene .beads. Rather it burns out to leave a porous mass of carbon and silicate. However contrary to expectation it does not shrink (indeed it expands) on burning out as might have been expected for such a carbon material in the absence of the silicate and perlite.
  • a fibrous vegetable material such as sugar cane waste provides a simple and cheap alternative to an organic filler such as polystyrene beads and yet, due to the combination of this material and the silicate and perlite components of the composition, will result in a composition which has good heat resistance and thermal insulation.
  • compositions having fibrous vegetable material or one of the organic fillers are found to have improved strength when set.
  • other fibrous vegetable materials which may be used are straw (that is to say stalks from wheat, flax, oats, barley, maize etc.), wood wool from waste sources, peanut shells and the like. Typically such materials have a diameter of from 1 to 5 mm.
  • the water content of the fibrous vegetable material is about 15%.
  • compositions in accordance with the first aspect of the present invention may be prepared in a manner similar to that described in our above mentioned co-pending patent application, that is to say, by preparing a slurry and coating the vegetable material with this slurry in a suitable mixture.
  • the fibrous vegetable materials are usually waste products and are therefore often stored outside, the moisture content of the material can vary over a wide range.
  • the fibrous vegetable material should be treated, if necessary, to control the fibre length and the water content.
  • One method of treating the fibrous vegetable material is as follows.
  • the vegetable material is shredded and chopped so that the resultant strands have lengths of from 5 to 100 mm.
  • the material is then dried in a suitable warm air tumble dryer to a moisture content of about 15% by weight (plus or minus 5% by weight) .
  • the resultant material is then fed through a high speed continuous mixer and coated with a water repellant such as sodium methyl siliconate.
  • a water repellant such as sodium methyl siliconate.
  • An example of a sodium methyl siliconate is Dow Corning 772 (DC 772) manufactured by Dow Corning Ltd.
  • the DC 772 is diluted with water to form a solution containing from 1 to 5% solids. This diluted solution is mixed with the vegetable material in the proportions of 100 parts by volume of vegetable material to 1 part by volume of DC 772 solution.
  • the resultant treated vegetable material is then re-dried to a moisture content of 15% by weight (plus or minus 5% by weight) and if not required immediately is stored for future use.
  • the treated vegetable material When required for use the treated vegetable material is fed into a twin trough continuous mixer. In one trough the vegetable material is coated with sodium silicate solution and in the other trough a mixture in powder form is prepared. This mixture contains raw perlite and other ingredients of the fire resistant composition. The materials in the twin trough are brought together in the final stages of the mixing and then discharged into moulds to be allowed to set.
  • the fibrous vegetable material is shredded and chopped as mentioned in the first example above. The material is then dried to a moisture content of 15% by weight (plus or minus 5%).
  • the dried material is immersed in a tank containing a dilute solution of sodium silicate. This is then passed through rollers to remove surplus solution and the resultant saturated material is then mixed with a powder mixture in the same way as described in the first example above and discharged from the mixer into suitable moulds.
  • a panel for instance, a door or a partition, having a frame and, within the frame, a core made of heat resisting, thermally insulating material, may be made by forming a pourable composition which on setting is a suitable heat-resistant, thermally insulating material and pouring the composition into a mould the sides of which are provided by the frame so that on setting the core is located in position in the frame.
  • the heat-resistant thermally insulating material may for instance bs a composition which is the subject of our first mentioned co-pending application No. 15650/78
  • This method of forming a core "in situ" within a frame simplifies the production of panels having heat- resistant cores.
  • the frame is made of, for instance timber or a composite material
  • any water exuded from the composition during setting tends to be absorbed into the material of the frame and therefore does not adversely affect the adhesion between the core and the frame.
  • the frame is made of such a "porous" material it is necessary to allow the compositions to dry, for instance by applying heat or warm air to them within the frame.
  • the frame is made of a material or materials which are of an impervious nature, for instance metal or plastics, there is a problem of adhesion between the core and the frame as a result of water exuded from the composition.
  • a heat-resistant, thermally insulating composition comprising organic filler, a silicate binder, raw perlite, inorganic filler other than raw perlite, and an agent, for instance, a powder or filler which is capable of combining with the water released by the composition during setting thereof.
  • a filler in the case where a filler is used to "mop up" the water, it may be the same filler as one or both of the organic filler and the inorganic filler or it may be an additional filler added to the composition.
  • a preferred agent for taking up water in the manner described is the hardener dicalcium silicate.
  • the dicalcium silicate is present in an amount of from 20 to 65% by weight of the amount by weight of sodium silicate in the composition. More preferably the dicalcium silicate is present in an amount of from 25 to 50% by weight of the amount by weight of sodium silicate.
  • a heat-resistant, thermally insulating composition of the type with which this invention is concerned is formed in an ordinary mould or in situ within a panel frame, it is normally formed by loading the pourable composition into the mould and compressing the composition in the mould. It is desired however to obtain panel cores as light as possible for certain applications for instance the use as cores for metal faced doors.
  • a method of forming a core for a panel comprising forming a pourable composition which on setting is a suitable heat-resistant, thermally insulating material, the composition including an expanding agent, locating the composition in a suitable mould and allowing it to expand to fill the mould.
  • the composition may be a composition as described in our co-pending application No. 15650/78 or as described above in accordance with the first aspect of the present invention.
  • the mould may be a normal mould or may be formed from thepanel frame and the method of this third aspect of the present, invention is particularly advantageous when the article being manufactured has contoured faces.
  • the amount of expansion brought about by the expanding agent may be a relatively small amount, for instance, from 10 to 50% by volume.
  • a preferred expanding agent is ferrosilicon which acts as an expanding agent in the presence of sodium silicate. It gives off hydrogen during its expansion.
  • the ferrosilicon is present in an amount of from 5 to 50% by weight of the amount of sodium silicate used in the composition. A preferred range is from 10 to 30% by weight.
  • composition containing the expanding agent When the composition containing the expanding agent is located within a mould, heating of the assembly to a temperature of from say 50 to 100oC will activate the expanding agent so that the composition then swells to fill the entire space within the mould.
  • fire-resistant, thermally insulating panel cores having a filler derived from a fibrous vegetable material, such as sugar cane waste.
  • the cores may be formed in situ within a metal or plastics frame, together with metal or plastics facings, because the presence in the composition of a filler. or hardener which takes up water.
  • a very low weight core can be formed and if" desired one having contoured faces.
  • composition incorporating all aspects of the present invention may include raw perlite, pulverised fly ash, kaolin, calcium carbonate, dolomite, a powder hardener such as sodium fluosilicate or dicalcium silicate.
  • compositions in accordance wi ⁇ h the present invention will now be described by way of examples.
  • the amounts of components given in the samples are amounts in kilograms which are such as to produce one cubic metre of composition in accordance with the invention.
  • Sodium silicate Q79 is a neutral sodium silicate manufactured by I.C.I.
  • Example 2 illustrates the first aspect of the present invention.
  • Example 2 illustrates the first aspect of the present invention.
  • Raw perlite ore 30 This example illustrates the first and second aspects of the present invention.
  • the composition is formed in accordance with the method described above in which the sugar cane is treated with a water repellant such as Dow Corning 772.
  • Sodium silicate M 75 is manufactured by I.C.I.
  • Example 4 illustrates the first and second aspects of the present invention.
  • the composition is formed as described above in which the sugar cane waste is immersed in a diluted solution of sodium silicate.
  • Example 4
  • This example illustrates the third aspect of the present invention.

Landscapes

  • 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)
  • Building Environments (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Une composition resistante a la chaleur, a isolation thermique, comprend un materiau vegetal fibreux, un liant de silicate, de la perlite brute et un materiau de remplissage inorganique autre que la perlite brute, la longueur des filaments du materiau vegetal fibreux etant comprise entre 5 et 100 mm et la teneur en eau entre 10 et 20%. Le materiau vegetal fibreux peut etre constitue par les dechets de canne a sucre. Un procede de preparation d'une telle composition est decrit. Une autre composition d'isolation thermique, resistante a la chaleur, comprend un materiau de remplissage organique, un liant de silicate, de la perlite brute, un materiau de remplissage inorganique autre que la perlite brute et un agent capable de se combiner a l'eau libere par la composition pendant sa prise. L'agent peut etre, par exemple, du silicate de calcium double. Un procede de formation d'un noyau pour un panneau, le noyau etant constitue du materiau de resistance et d'isolation thermique, consiste a former une composition pouvant couler, a placer la composition dans un moule approprie et la laisser se dilater pour remplir le moule. La composition peut etre semblable a celles mentionnees ci-dessus.
EP80901958A 1979-10-30 1980-10-27 Composition resistante a la chaleur Withdrawn EP0045744A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7937599 1979-10-30
GB7937599 1979-10-30

Publications (1)

Publication Number Publication Date
EP0045744A1 true EP0045744A1 (fr) 1982-02-17

Family

ID=10508865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80901958A Withdrawn EP0045744A1 (fr) 1979-10-30 1980-10-27 Composition resistante a la chaleur

Country Status (2)

Country Link
EP (1) EP0045744A1 (fr)
WO (1) WO1981001283A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7733557B2 (en) 2006-04-24 2010-06-08 Micron Technology, Inc. Spatial light modulators with changeable phase masks for use in holographic data storage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832452A1 (de) * 1988-09-23 1990-03-29 Lothar Mansfeld Anorganischer baustoff und dessen verwendung
DE4317575A1 (de) * 1992-06-05 1994-12-01 Gotthardt Thieme Dämmstoff auf Basis von Altrohstoffen und fasrigen Rohstoffen sowie Verfahren zu dessen Herstellung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1106955A (en) * 1965-03-23 1968-03-20 Karl Friedrich Keil Process for compacting and stiffening of loose natural or artificial soils
GB1101323A (en) * 1965-08-17 1968-01-31 Foseco Int Articles of bonded particulate material
GB1301922A (fr) * 1969-02-18 1973-01-04
GB1342885A (en) * 1971-04-19 1974-01-03 Foseco Trading Ag Hot top slabs and sleeves
GB1337531A (en) * 1972-03-08 1973-11-14 Nii Betona I Zhelezobetona Gos Mix for use in the production of refractory gas concrete
JPS4931535A (fr) * 1972-07-22 1974-03-22
US4159302A (en) * 1975-10-14 1979-06-26 Georgia-Pacific Corporation Fire door core

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8101283A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7733557B2 (en) 2006-04-24 2010-06-08 Micron Technology, Inc. Spatial light modulators with changeable phase masks for use in holographic data storage
US8134771B2 (en) 2006-04-24 2012-03-13 Micron Technology, Inc. Spatial light modulators with changeable phase masks for use in holographic data storage

Also Published As

Publication number Publication date
WO1981001283A1 (fr) 1981-05-14

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB NL

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19820524

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DIXON, MAURICE