WO1997010187A1 - Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung - Google Patents
Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung Download PDFInfo
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- WO1997010187A1 WO1997010187A1 PCT/EP1996/003867 EP9603867W WO9710187A1 WO 1997010187 A1 WO1997010187 A1 WO 1997010187A1 EP 9603867 W EP9603867 W EP 9603867W WO 9710187 A1 WO9710187 A1 WO 9710187A1
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- Prior art keywords
- composite material
- airgel
- material according
- airgel particles
- fibers
- Prior art date
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Classifications
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/064—Silica aerogel
-
- 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
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249955—Void-containing component partially impregnated with adjacent component
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249967—Inorganic matrix in void-containing component
- Y10T428/249969—Of silicon-containing material [e.g., glass, etc.]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249986—Void-containing component contains also a solid fiber or solid particle
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/268—Monolayer with structurally defined element
Definitions
- the invention relates to novel composite materials of any shape with high thermal insulation capacity, which contain from 5 to 97% by volume of airgel particles and at least one adhesive, the particle diameter of the airgel particles being less than 0.5 mm.
- thermosetting resins such. B. urea, melamine and phenol formaldehyde resins or mixtures of these resins.
- the resins are filled with fillers such.
- wood flour, asbestos and preferably cellulose, optionally with additional lubricants, such as. B. zinc stearate, pigments such as. B. titanium dioxide, plasticizers, such as. B. glycerol or o, p-toluenesulfonamide and / or acidic or acid-releasing hardening accelerators are mixed into so-called molding compounds which are cured into molds in presses using pressures from 100 to 2500 bar and temperatures from 100 to 200 ° C (plastic handbook 10 " Duroplast ", editor Prof. Dr.
- the resins can be used as powder resins in the so-called melt flow process or as liquid resins in the so-called liquid resin process be used.
- the composition of a typical molding compound according to DIN 7708 Type 1 52 looks as follows:
- lubricant e.g. B. zinc stearate
- Aerogeies especially those with porosities above 60% and densities below 0.6 g / cm 3 , have an extremely low thermal conductivity due to their very low density and high porosity and are therefore used as heat insulation materials, such as. B. described in EP-A-0 1 71 722.
- the high porosity also leads to low mechanical stability of both the gel from which the airgel is dried and the dried airgel itself.
- Aerogels have extremely low dielectric constants with values between 1 and 2, depending on the density of the airgel. Aerogeies are therefore also predestined for electronic applications, for example for high-frequency applications (SCW Hrubesh et al., J. Mater. Res. Vol. 8, No. 7, 1 736-1 741). Aerogeics in the broader sense, ie in the sense of "gel with air as a dispersing agent", are produced by drying a suitable gel.
- airgel in this sense includes aerogeies in the narrower sense, xerogels and cryogels. A dried gel is referred to as an airgel in the narrower sense if the liquid of the gel is removed at temperatures above the critical temperature and starting from pressures above the critical pressure.
- the liquid of the gel is removed subcritically, for example with the formation of a liquid-vapor boundary phase, the resulting gel is often referred to as a xerogel.
- the gels according to the invention are aerogels in the sense of gel with air as a dispersing agent.
- the molding process of the airgel is completed during the sol-gel transition.
- the outer shape can only be changed by comminution, for example grinding.
- EP-A-0 340 707 discloses an insulating material with a density of 0.1 to 0.4 g / cm 3 , which consists of at least 50% by volume of silica airgel particles with a diameter of between 0.5 and 5 mm exists, which are connected to one another by means of at least one organic and / or inorganic binder.
- Reaction adhesives silicone resin adhesives, hot melt adhesives and aqueous dispersion adhesives are disclosed as organic binders.
- the relatively coarse grain size means that the insulation materials produced do not have a uniform appearance, which is disadvantageous for many applications.
- the relatively coarse grain size means that molded articles produced from the insulating material have an inhomogeneous distribution of the airgel material. This applies in particular if the smallest typical dimensions of the shaped bodies, in the case of foils or plates, the thickness are not very much larger than the typical airgel particle diameter. An increased proportion of binder would be required especially in the edge regions, which would then have a negative effect on the thermal conductivity and the dielectric properties of the molded body, particularly on the surface.
- areas of airgel material with diameters between 0.5 and 5 mm would be mechanically unstable in a molded body made of this insulating material, which would eventually cause surface unevenness with diameters or depths of up to 5 under mechanical loads by destroying the aerogenicity on the surface mm could lead.
- EP-A-0 340 707 also describes a method according to which the airgel particles are coated and / or mixed with a binder, and the resulting mass is then cured in a mold.
- the mixed mass tends to separate, ie it is unstable over a longer period of time necessary for use and storage.
- the shaping can only take place in a surrounding form by relatively rapid hardening of the mixed mass.
- This object is achieved by a composite material which contains 5 to 97% by volume of airgel particles and at least one adhesive, and which is characterized in that the particle diameter of the airgel particles is less than 0.5 mm.
- the adhesive or adhesives form a matrix that connects or encloses the airgel particles and runs through the entire composite material as a continuous phase.
- a content of airgel particles that is significantly above 97% by volume would lead to an adhesive content of less than 3% by volume. In this case, its proportion would be too low to ensure sufficient connection of the airgel particles to one another and mechanical pressure and bending strength.
- the proportion of airgel particles is preferably in the range from 10 to 97% by volume, particularly preferably in the range from 20 to 95% by volume and in particular in the range from 40 to 95% by volume.
- the particle diameter of the airgel particles is less than 0.5 mm, preferably less than 0.2 mm.
- the diameter can be significantly smaller, but preferably larger than 1 ⁇ m.
- the particle diameter relates to the mean diameter of the individual airgel particles, since the airgel particles do not necessarily have to have a spherical shape due to the production process, for example by grinding.
- Suitable aerogies for the compositions according to the invention are those based on metal oxides which are suitable for sol-gel technology (CJ. Brinker, GW Scherer, Sol-Gel-Science, 1 990, chapters 2 and 3), such as Si - or Al compounds or those based on organic substances which are suitable for sol-gel technology, such as melamine formaldehyde condensates (US Pat. No. 5,086,085) or resorcinol formaldehyde condensates (US Pat. No. 4,873,218). They can also be based on mixtures of the above materials.
- Aerogels containing Si compounds are preferably used.
- the airgel can contain IR opacifiers, such as, for example, carbon black, titanium dioxide, iron oxides or zirconium dioxide, and mixtures thereof.
- the airgel particles have permanently hydrophobic surface groups.
- trimethylsilyl groups is particularly advantageous for permanent hydrophobization of the airgel.
- These groups can be introduced as described in WO 94/251 49, or by gas phase reaction between the airgel and, for example, an activated trialkylsilane derivative, such as, for example, a chlorotrialkylsilane or a hexaalkyldisilazane (compare R. Her, The Chemistry of Silica, Wiley & Sons, 1 979).
- an activated trialkylsilane derivative such as, for example, a chlorotrialkylsilane or a hexaalkyldisilazane
- Airgel particles with hydrophilic surface groups can, depending on the air humidity, water adsorb, which results in that the dielectric constant and dielectric loss factor can vary with the air humidity. This is often not desirable for electronic applications.
- the use of airgel particles with hydrophobic surface groups prevents this variation since no water is adsorbed.
- the selection of the residues also depends on the typical application temperature.
- the thermal conductivity of the aerogeie decreases with increasing porosity and decreasing density. Aerogeies with porosities above 60% and densities below 0.6 g / cm 3 are therefore preferred. Aerogie with densities below 0.4 g / cm 3 are particularly preferred.
- Non-aqueous binders in the sense of the present application are solvents or solvent mixtures which contain less than 50% by weight of water.
- the adhesive is either in liquid form, i.e. H. used as a liquid, melt, solution, dispersion or suspension or used as a solid powder.
- Suitable physically setting one-component adhesives are e.g. B. Hot melt adhesives, such as ethylene-vinyl acetate copolymers and polyamides, polyethylene waxes, dispersion adhesives, solvent-based adhesives and plastisols.
- Hot melt adhesives such as ethylene-vinyl acetate copolymers and polyamides, polyethylene waxes, dispersion adhesives, solvent-based adhesives and plastisols.
- Suitable chemically curing one-component adhesives are e.g. B. thermosetting epoxy resins, formaldehyde condensates, polyimides, polybenzimidazoles, cyanoacrylates, polyvinyl alcohols, polyvinyl butyrals, anaerobic adhesives, moisture-curing silicones and light-curing and UV-curing systems, with polyvinyl butyrals and / or polyvinyl alcohols and / or phenol, formaldehyde resins, mixtures, and resorcinol resins the same are preferred.
- B. thermosetting epoxy resins, formaldehyde condensates, polyimides, polybenzimidazoles, cyanoacrylates, polyvinyl alcohols, polyvinyl butyrals, anaerobic adhesives, moisture-curing silicones and light-curing and UV-curing systems with polyvinyl butyrals and / or polyvinyl alcohols and / or phenol, formaldehy
- Suitable chemically curing two-component adhesives are e.g. B. methacrylates, two-component silicones, cold-curing epoxy resins and cold-curing polyurethanes.
- the adhesive is generally used in an amount of 3 to 95% by volume of the composite material, preferably in an amount of 3 to 90% by volume, particularly preferably in an amount of 5 to 80% by volume and in particular in one Amount from 5 to 60 vol .-%.
- the binder is selected depending on the desired mechanical and thermal properties of the composite material.
- the adhesives preference is also given to selecting those products which essentially do not penetrate into the interior of the porous airgel particles.
- the penetration of the adhesive into the interior of the airgel particles can be done not only by selecting the adhesive but also by regulating the temperature as well the processing time can be influenced.
- the composite material can be IR opacifying agents, e.g. Contain carbon black, titanium dioxide, iron oxides or zirconium dioxide and mixtures thereof, which is particularly advantageous for applications at high temperatures.
- IR opacifying agents e.g. Contain carbon black, titanium dioxide, iron oxides or zirconium dioxide and mixtures thereof, which is particularly advantageous for applications at high temperatures.
- the composite material can also up to 85 vol .-% fillers such.
- fillers such as wood flour, asbestos and preferably cellulose, for example to improve the mechanical properties, contain.
- the proportion of fillers, based on the composite material is preferably less than 70% and particularly preferably in the range from 0 to 50% by volume.
- the composite material can also contain at least one fiber material.
- the addition of fibers is particularly advantageous for thermal applications and in terms of cracking and breaking strength.
- Natural fibers such as cellulose, cotton or flax fibers and artificial fibers can be used as the fiber material, with both inorganic fibers such as glass fibers and mineral fibers being used as artificial fibers.
- Silicon carbide fibers or carbon fibers, as well as organic fibers such as polyester fibers, polyamide fibers or polyaramid fibers can be used.
- the fibers can be new or generated from waste, such as shredded glass fiber waste or rags.
- the fibers can also be coated, such as polyester fibers, which are metallized with a metal such as aluminum.
- the fibers can be smooth or crimped as individual fibers, as a bulk or as a non-woven or woven fabric.
- Nonwoven fabrics and / or fabrics can be contained in the composite as a coherent whole and / or in the form of several small pieces.
- the fibers can have round, t ⁇ lobal, pentalobal, octalobal, ribbon, fir tree, barbell or other star-shaped profiles. Hollow fibers can also be used.
- fibers with a diameter between 0.1 ⁇ m and 5 mm are used.
- the use of smaller diameters leads to more break-resistant composite materials.
- the diameter of the fibers used in the composite material should preferably be smaller than the average diameter of the airgel particles in order to be able to bind a high proportion of airgel in the composite.
- the choice of very thin fibers makes the composite more flexible.
- the length of the fibers is in no way limited. However, the length of the fibers should preferably be greater than the mean diameter of the airgel particles.
- the mechanical strength can be influenced by the length and distribution of the fibers in the composite material.
- fibers are therefore used with particular preference, the length of which is between 0.5 and 10 cm.
- the volume fraction of the fibers should preferably be between 0.1 and 40% by volume, particularly preferably in the range between 0.1 and 15% by volume.
- the thermal conductivity of the fiber material should preferably be ⁇ 1 W / mK.
- the fiber diameter in a) non-metalized fibers should preferably be 0.1 to 30 ⁇ m and / or in b) metallized fibers preferably 0.1 to 20 ⁇ m.
- the radiation contribution to thermal conductivity can be further reduced by using blackened fibers, e.g. polyester fibers blackened with soot or directly carbon fibers.
- blackened fibers e.g. polyester fibers blackened with soot or directly carbon fibers.
- the fibers can also be coated with sizes or contact agents (coupling agents), as is customary, for example, with glass fibers.
- the adhesive either connects the fibers and aerogeies to one another and to one another, or else the adhesive serves as a matrix material in which the fibers and the airgel particles are embedded.
- lubricants such as. B. zinc stearate, pigments such. B. titanium dioxide, plasticizers such. B. glycerol and o, p-toluenesulfonamide and / or acidic or acid-releasing curing accelerators may be included.
- the composite material is hydrophilic due to the adhesive used and / or due to hydrophilic airgel particles
- a subsequent treatment can optionally be carried out which gives the composite material hydrophobic properties.
- All substances known to the person skilled in the art for this purpose are suitable for this purpose, which give the composite material a hydrophobic surface, such as, for. B. paints, films, silylating agents, silicone resins, inorganic and / or organic binders.
- Coupled agents can also be used for bonding. They bring about better contact of the adhesive with the surface of the airgel particles and can also form a firm bond both with the airgel particles and with the adhesive.
- the molded articles according to the invention made from airgel granules, in particular in sheet form, which contain or essentially consist of the composite material according to the invention, preferably have a density of less than 0.6 g / cm 3 and preferably a thermal conductivity of less than 100 mW / m. Purchase.
- the thermal conductivity is particularly preferably below 50 mW / m »K and in particular in the range from 20 to 40 mW / m » K.
- the fire class of the composite material obtained after drying is determined by the fire class of the airgel and the adhesive and, if applicable, that of the Determined fiber material.
- adhesives that are flame-retardant such as. B. urea and melamine formaldehyde resins, silicone resin adhesives, polyimide and polybenzimidazoi resins, and fibers made of non-combustible material, such as mineral, glass or SiC fibers.
- the airgel particles are connected to one another by means of at least one adhesive.
- the individual particles can be connected to one another in a quasi-punctiform manner.
- Such a surface coating can be achieved, for example, by spraying the airgel particles with the adhesive.
- the coated particles are then filled into a mold, for example, and cured in the mold.
- the gusset volume between the individual particles is also completely or partially filled by the adhesive.
- a composition can be produced, for example, by mixing the airgel particles and optionally the fibers with the adhesive.
- the mixing can be carried out in any conceivable way. On the one hand, it is possible to introduce the at least two components into the mixing device at the same time, on the other hand, one of the components can also be introduced and the other (s) can then be added.
- the mixing device necessary for the mixing is in no way limited. Any mixing device known to those skilled in the art for this purpose can be used.
- the mixing process is carried out until there is an approximately uniform distribution of the airgel particles in the composition.
- the Mixing process can be regulated both over the period of time and, for example, over the speed of the mixing device.
- the mixture is pressed. It is possible for the person skilled in the art to select the suitable press and the suitable pressing tool for the respective application.
- the use of vacuum presses is advantageous due to the high air content of the airgel-containing molding compounds.
- the airgel-containing molding compounds are pressed into sheets.
- the airgel-containing mixture to be pressed can be separated off against the press rams using release paper.
- the mechanical strength of the airgel-containing plates can be improved by laminating screen fabrics, nonwovens or papers onto the surface of the plate.
- the screen fabrics, nonwovens or papers can be applied subsequently to the airgel-containing plates, whereby the screen fabrics, nonwovens or papers can be impregnated beforehand, for example with melamine resins, and then bonded to the plate surfaces in a heatable press under pressure, as well as, in a preferred embodiment, in one step by inserting the screen fabrics, nonwovens or papers, which can optionally be impregnated with melamine resin, into the mold and placing on the airgel-containing molding compound to be compressed and then pressed under pressure and temperature to an airgel-containing composite panel.
- the pressing generally takes place at any pressure from 1 to 1000 bar and temperatures from 0 to 300 ° C.
- Melamine formaldehyde resins are preferably pressed at pressures of 5 to 50 bar, particularly preferably 10 to 20 bar and temperatures preferably from 100 to 200 ° C, particularly preferably 1 30 to 1 90 ° C and in particular between 1 50 and 1 75 ° C in any Forms instead.
- the composite materials according to the invention are suitable as heat insulation materials because of their low thermal conductivity.
- hydrophobic aerogie were prepared analogously to the process disclosed in DE-A-43 42 548.
- the thermal conductivities of the airgel granules were measured using a heating wire method (see, for example, O. Nielsson, G. Joschenpöhler, J. subject, J. Fricke, High Temperatures - High Pressures, Vol. 21, 267-274 (1,989)).
- the thermal conductivities of the moldings were measured in accordance with DIN 5261 2.
- Molded body made of airgel and melamine-formaldehyde resin
- hydrophobic airgel There are 20 g hydrophobic airgel (94 vol .-%) and 5 g of melamine-formaldehyde powder resin Madurit ® MW 909 (6 vol .-%) are intimately mixed.
- the hydrophobic airgel granules have a grain size in the range from 50 to 250 ⁇ m, a bulk density of 0.1 g / cm 3 , a BET surface area of 570 m 2 / g and a thermal conductivity of 1 5.7 mW / mK.
- the bottom of the mold with a base area of 1 2 cm x 1 2 cm is lined with release paper.
- the airgelhalge molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at a temperature of 1 70 ° C and a pressure of 10 bar for 30 minutes.
- the molded body obtained has a density of 0.32 g / cm 3 and a thermal conductivity of 30 mW / m * K.
- Molded body made of airgel, melamine-formaldehyde resin and lubricant
- the hydrophobic airgel granules have a grain size in the range from 50 to 250 ⁇ m, a bulk density of 0.117 g / cm 3 , a BET surface area of 540 m 2 / g and a thermal conductivity of 1 8.4 mW / mK .
- the molded body obtained has a density of 0.33 g / cm 3 and a thermal conductivity of 33 mW / m «K.
- Molded body made of airgel, melamine-formaldehyde resin and filler
- Table 1 Composition of the molding compounds in vol .-% and densities of the moldings obtained
- Molded body made of melamine-formaldehyde resin and silica
- melamine formaldehyde powder resin Madurit ® MW 396 90 g of melamine formaldehyde powder resin Madurit ® MW 396 are thoroughly mixed with 100 g of Perkasil KS 404 silica, 30 g of microcellulose and 2.5 g of zinc stearate and in a press with a base area of 1 2 cm ⁇ 1 2 cm at a temperature of 1 55 ° C and a pressure of 270 bar for 4 minutes.
- the molded body obtained has a density of 1.37 g / cm 3 and a thermal conductivity of 1 50 mW / m »K.
- Molded body made of airgel and polyvinyl alcohol
- the hydrophobic airgel granulate has a grain size of less than 500 ⁇ m, a bulk density of 75 kg / m 3 , a BET surface area of 610 m 2 / g and a thermal conductivity of 15 mW / (mK).
- the polyvinyl alcohol solution consists of 10 wt .-% Mowiol ® type 40-88 and 90 wt .-% ethanol.
- the bottom of the mold with a base area of 1 2 cm x 1 2 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at ambient temperature with a pressure of 70 bar for 2 minutes and then dried.
- the molded body obtained has a thermal conductivity of 24 mW / (mK).
- Molded body made of airgel and polyethylene wax
- the bottom of the mold with a base area of 1 2 cm x 1 2 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 70 ° C. at a pressure of 70 bar for 30 minutes.
- the molded body obtained has a thermal conductivity of 25 mW / (r ⁇ vK).
- Molded body made of airgel and polyethylene wax
- the bottom of the mold with a base area of 12 cm x 1 2 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 180 ° C. at a pressure of 70 bar for 30 minutes.
- the molded body obtained has a thermal conductivity of 28 mW / (r ⁇ vK).
- Molded body made of airgel and polyvinyl butyral
- hydrophobic airgel granulate has a grain size of less than 500 ⁇ m, a bulk density of 75 kg / m 3 , a BET surface area of 640 m 2 / g and a thermal conductivity of 1 1 mW / (mK).
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 1 8 mm.
- the molded body obtained has a density of 361 kg / m 3 and a thermal conductivity of 33 mW / (mK).
- Molded body made of airgel and polyvinyl butyral
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 1 8 mm.
- the molded body obtained has a density of 335 kg / m 3 and a thermal conductivity of 24 mW ⁇ nrvK).
- Molded body made of airgel and polyvinyl butyral
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 18 mm.
- the molded body obtained has a density of 246 kg / m 3 and a thermal conductivity of 19 mW / lm-K).
- Moldings made of airgel, polyvinyl butyral and fibers
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 18 mm.
- the molded body obtained has a density of 269 kg / m 3 and a thermal conductivity of 20 mW / (r ⁇ vK).
- Moldings made from airgel, polyvinyl butyral and recycled fibers
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 18 mm.
- the molded body obtained has a density of 282 kg / m 3 and a thermal conductivity of 25 mW / (mK).
- Molded body made of airgel, polyvinyl butyral and film residues
- the bottom of the mold with a base area of 30 cm x 30 cm is lined with release paper.
- the airgel-containing molding compound is then evenly distributed and the whole thing is covered with a release paper. It is pressed at 220 ° C for 30 minutes to a thickness of 18 mm.
- the molded body obtained has a density of 355 kg / m 3 and a thermal conductivity of 26 mW / (mK).
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Silicon Compounds (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/029,140 US6143400A (en) | 1995-09-11 | 1996-09-04 | Aerogel and adhesive-containing composite, process for its production and its use |
EP96931764A EP0850206B1 (de) | 1995-09-11 | 1996-09-04 | Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung |
JP51161597A JP4120992B2 (ja) | 1995-09-11 | 1996-09-04 | エーロゲルおよび接着剤を含有する複合材料、その製造法、ならびにその使用 |
DE59610276T DE59610276D1 (de) | 1995-09-11 | 1996-09-04 | Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung |
AT96931764T ATE235438T1 (de) | 1995-09-11 | 1996-09-04 | Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung |
NO980904A NO980904D0 (no) | 1995-09-11 | 1998-03-02 | Aerogel- og klebestoffholdig komposittmateriale, fremgangsmåte for dets fremstilling samt dets anvendelse |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19533565.1 | 1995-09-11 | ||
DE1995133565 DE19533565A1 (de) | 1995-09-11 | 1995-09-11 | Aerogel- und klebstoffhaltiges Verbundmaterial, Verfahren zu seiner Herstellung |
DE1996122865 DE19622865A1 (de) | 1996-06-07 | 1996-06-07 | Aerogel- und klebstoffhaltiges Verbundmaterial, Verfahren zu seiner Herstellung sowie seine Verwendung |
DE19622865.4 | 1996-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997010187A1 true WO1997010187A1 (de) | 1997-03-20 |
Family
ID=26018468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003867 WO1997010187A1 (de) | 1995-09-11 | 1996-09-04 | Aerogel- und klebstoffhaltiges verbundmaterial, verfahren zu seiner herstellung sowie seine verwendung |
Country Status (12)
Country | Link |
---|---|
US (1) | US6143400A (de) |
EP (1) | EP0850206B1 (de) |
JP (1) | JP4120992B2 (de) |
KR (1) | KR19990044558A (de) |
CN (1) | CN1077556C (de) |
AT (1) | ATE235438T1 (de) |
CA (1) | CA2231538A1 (de) |
DE (1) | DE59610276D1 (de) |
ES (1) | ES2189881T3 (de) |
MX (1) | MX9801906A (de) |
NO (1) | NO980904D0 (de) |
WO (1) | WO1997010187A1 (de) |
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WO2012013812A1 (en) | 2010-07-30 | 2012-02-02 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
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- 1996-09-04 ES ES96931764T patent/ES2189881T3/es not_active Expired - Lifetime
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- 1996-09-04 WO PCT/EP1996/003867 patent/WO1997010187A1/de not_active Application Discontinuation
- 1996-09-04 JP JP51161597A patent/JP4120992B2/ja not_active Expired - Fee Related
- 1996-09-04 EP EP96931764A patent/EP0850206B1/de not_active Expired - Lifetime
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7470725B2 (en) | 1996-11-26 | 2008-12-30 | Cabot Corporation | Organically modified aerogels, processes for their preparation by surface modification of the aqueous gel, without prior solvent exchange, and subsequent drying, and their use |
WO1998032709A1 (de) * | 1997-01-24 | 1998-07-30 | Cabot Corporation | Mehrschichtige verbundmaterialien, die mindestens eine aerogelhaltige schicht und mindestens eine weitere schicht aufweisen, verfahren zu ihrer herstellung sowie ihre verwendung |
US7468205B2 (en) | 1997-01-24 | 2008-12-23 | Cabot Corporation | Multilayer composite materials with at least one aerogel-containing layer and at least one other layer, process for producing the same and their use |
US6378229B1 (en) | 1997-12-19 | 2002-04-30 | Cabot Corporation | Method for the sub-critical drying of lyogels to produce aerogels |
US7297718B2 (en) | 1998-01-14 | 2007-11-20 | Cabot Corporation | Method of producing substantially spherical lyogels in water insoluble silylating agents |
US6825260B2 (en) | 1998-06-05 | 2004-11-30 | Cabot Corporation | Nanoporous interpenetrating organic-inorganic networks |
US8003028B2 (en) | 2005-07-26 | 2011-08-23 | The Boeing Company | Composite of aerogel and phase change material |
WO2007014284A3 (en) * | 2005-07-26 | 2007-05-10 | Boeing Co | Composite of aerogel and phase change material |
EP2281962B1 (de) | 2009-06-25 | 2017-04-05 | Knauf Insulation | Aerogelhaltige Verbundwerkstoffe |
WO2011012710A1 (en) | 2009-07-31 | 2011-02-03 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
EA020286B1 (ru) * | 2009-07-31 | 2014-10-30 | Роквул Интернэшнл А/С | Способ производства аэрогельсодержащего композита и композит, полученный данным способом |
US9260345B2 (en) | 2009-07-31 | 2016-02-16 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
WO2012013817A1 (en) | 2010-07-30 | 2012-02-02 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
WO2012013812A1 (en) | 2010-07-30 | 2012-02-02 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
US9975270B2 (en) | 2010-07-30 | 2018-05-22 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by that method |
WO2012062796A1 (en) | 2010-11-09 | 2012-05-18 | Rockwool International A/S | Method for manufacturing an aerogel-containing composite and composite produced by said method |
Also Published As
Publication number | Publication date |
---|---|
JPH11514959A (ja) | 1999-12-21 |
NO980904L (no) | 1998-03-02 |
MX9801906A (es) | 1998-11-30 |
ATE235438T1 (de) | 2003-04-15 |
US6143400A (en) | 2000-11-07 |
CA2231538A1 (en) | 1997-03-20 |
NO980904D0 (no) | 1998-03-02 |
CN1196035A (zh) | 1998-10-14 |
KR19990044558A (ko) | 1999-06-25 |
EP0850206B1 (de) | 2003-03-26 |
JP4120992B2 (ja) | 2008-07-16 |
DE59610276D1 (de) | 2003-04-30 |
ES2189881T3 (es) | 2003-07-16 |
CN1077556C (zh) | 2002-01-09 |
EP0850206A1 (de) | 1998-07-01 |
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