EP2836312B1 - Installation et procédé d'application à commande pneumatique d'un matériau de revêtement poreux sur un substrat - Google Patents

Installation et procédé d'application à commande pneumatique d'un matériau de revêtement poreux sur un substrat Download PDF

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Publication number
EP2836312B1
EP2836312B1 EP13714914.2A EP13714914A EP2836312B1 EP 2836312 B1 EP2836312 B1 EP 2836312B1 EP 13714914 A EP13714914 A EP 13714914A EP 2836312 B1 EP2836312 B1 EP 2836312B1
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EP
European Patent Office
Prior art keywords
coating material
compressed air
valve unit
pressure vessel
water
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.)
Not-in-force
Application number
EP13714914.2A
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German (de)
English (en)
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EP2836312A1 (fr
Inventor
Michael Petry
Thorsten Adebahr
Joachim Müller
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Worlee Chemie GmbH
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Worlee Chemie GmbH
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Filing date
Publication date
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Priority to EP13714914.2A priority Critical patent/EP2836312B1/fr
Publication of EP2836312A1 publication Critical patent/EP2836312A1/fr
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Publication of EP2836312B1 publication Critical patent/EP2836312B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0093—At least a part of the apparatus, e.g. a container, being provided with means, e.g. wheels or casters for allowing its displacement relative to the ground
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1463—Arrangements for supplying particulate material the means for supplying particulate material comprising a gas inlet for pressurising or avoiding depressurisation of a powder container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/005—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 mounted on vehicles or designed to apply a liquid on a very large surface, e.g. on the road, on the surface of large containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/22—Silica
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
    • E04F21/06—Implements for applying plaster, insulating material, or the like
    • E04F21/08—Mechanical implements
    • E04F21/12—Mechanical implements acting by gas pressure, e.g. steam pressure

Definitions

  • the present invention relates to a system and a method for applying a liquid to pasty and porous coating material to a substrate, in particular by means of compressed air-controlled spraying of the coating material, as well as a part of the system which serves to control the promotion of the coating material so that its porosity making Properties are preserved. Furthermore, the present invention relates to the use of a porous coating material for spray application to a substrate.
  • liquid to pasty coating materials which contain highly porous solid particles which are based, for example, on aerogels or xerogels based on silica (silica).
  • coating materials may additionally contain gas bubbles which produce a foam-like structure.
  • Such solid particles can be obtained by known sol-gel methods and special drying methods and are available commercially and industrially. Due to their large pore volumes of up to more than 90%, they are interesting as insulating materials, in particular for heat, cold or sound insulation. Liquid to pasty coating materials of the aforementioned type are also referred to below as porous coating materials.
  • the surfaces to be insulated are coated with the materials, so that the desired insulating effect is achieved, for. B. for roofs, exterior and interior walls of buildings or containers such as containers, tanks, pipelines, Vehicle parts, ship components, plant components of the chemical industry and other industries.
  • coating materials are generally done by rolling, trowelling or spraying.
  • the coating material is generally supplied from a reservoir via a suitable conduit to a spraying apparatus such as a spray gun, by means of which it is then applied to one or more surfaces (substrate) of an article.
  • porous coating materials When using porous coating materials, it has proved to be disadvantageous that the pressures occurring in the conveying of the material in installations which are suitable for the injection-molding of liquid to pasty materials on substrates according to the prior art, are so high that the porous and / or foam-like structure is impaired or even completely destroyed. This is accompanied by a corresponding loss of insulation performance.
  • porous coating materials can not be adequately sprayed in systems which are suitable for the spray-applied application of liquid to pasty materials on substrates according to the prior art. The delivery rate is minimal and it comes after a short period of operation to blockages.
  • pressure vessel pressure vessel
  • the coating material is filled into a container and pressurized with compressed air upon closure, thereby delivering material through an outlet from the container to a conduit connected thereto and devices connected thereto for processing and application of the material to substrates.
  • the formation of the funnel or V-shaped space prevents the promotion of the coating material.
  • the pressure vessel may be provided with a so-called pressure plate, also called a follower plate, which divides the container into a pressure medium space and a material space.
  • a so-called pressure plate also called a follower plate, which divides the container into a pressure medium space and a material space.
  • the pressure medium space is pressurized and the pressure plate then presses the coating material uniformly in the direction of the outlet.
  • too high pressures occur so that the porous structure is compressed, impaired or destroyed.
  • the DE 102 11 331 A1 describes a mechanically applicable sound or heat insulation and a method for applying the same.
  • a sprayable thermal insulation is mentioned. It can be used as insulating filler airgel.
  • the airgel can be conveyed in dry form by means of propellant air from a conveyor via a transport hose in the form of a so-called thin stream to a spraying device, which is located directly in front of a surface to be coated (application surface).
  • a mixer in which the dry airgel mixed with binder and moved in a so-called dense stream on to the spray nozzle and the mixture is then applied under pressure from directly to the spray nozzle supplied compressed air to the application surface. Furthermore, it is mentioned that a ready-processed, airgel-containing insulation material can be provided in containers and processed from the container by machine or by hand, without, however, disclosing details regarding a method or a device therefor.
  • the DE 39 16 319 A1 relates to a spray head on a plastering machine for processing mortar.
  • the mortar is conveyed by means of a mortar pump.
  • the spray head has an air supply, is supplied via the compressed air in the mouth region of the spray head before leakage of the mortar.
  • US 4,117,551 relates to a spray gun for applying urethane foam.
  • the individual components of the foam are supplied separately from storage containers of the spray gun and mixed within the spray gun and from there to a Substrate applied as a foam.
  • the structure of the spray gun is particularly in the FIGS. 2 to 6 shown.
  • valve unit for controlling the delivery of a coating material containing porous solid particles formed from airgel or xerogel particles of organic or inorganic materials
  • the valve unit has at least one longitudinally extending through the valve unit bore which forms a passageway for transporting the coating material, has at least one lateral bore which forms an inlet for the supply of compressed air, which is optionally mixed with water or aqueous additives, wherein the at least one lateral bore is connected to the longitudinal bore such that the coating material in the passageway with the compressed air can be mixed, and optionally has at least one further lateral bore which forms an inlet for water for cleaning purposes and which is also connected to the longitudinal bore, wherein the lateral bores are each provided with check valves.
  • the invention relates to the use of a coating material as defined herein for spray application to a substrate as defined herein.
  • the invention relates to a method for the isolation of an article, in which as substrate one or more surfaces of the object to be insulated are coated by the method according to the invention as defined herein.
  • the method according to the invention and the system according to the invention comprise further features in addition to the features mentioned in the patent claims.
  • the method and the system according to the invention consist of the features disclosed in the patent claims and the present description. The same applies mutatis mutandis to the part of the system according to the invention, which serves to control the promotion of the coating material.
  • the system according to the invention does not comprise pumps for conveying the coating material.
  • the porous coating material is conveyed by means of compressed air. It is in the valve unit according to the invention, which can also be referred to as a mixing unit, mixed with compressed air and, if necessary, water or water-containing additives.
  • the porous structure of the coating material can be obtained.
  • the present invention is thus characterized in particular by the advantage that no pumps are used to convey the coating material. Instead, the coating material is conveyed with compressed air and, in particular, in the valve or mixing unit according to the invention with compressed air and, if necessary, water / water-containing Mixed additives before then the coating material is supported by compressed air applied by means of a spraying apparatus on a surface to be coated.
  • FIG. 1 shows an overall view of the system according to the invention, a pressure vessel 1 , a spraying apparatus 2 , a valve unit according to the invention 3 , a Druckregelventil- and Druckmess Anlagensan Aunt (manometer) 5 for the regulation of compressed air supply and the corresponding lines 4a , 4b , 6, 7, 8 for compressed air - and coating material promotion includes.
  • a Druckregelventil- and Druckmess wornsan Aunt (manometer) 5 for the regulation of compressed air supply
  • the corresponding lines 4a , 4b , 6, 7, 8 for compressed air - and coating material promotion includes.
  • FIG. 1 is another container for receiving liquid, especially water or water-containing liquids, and a conduit with which the container is connected to the compressed air line 7 , so that the compressed air supplied in the valve unit 3 can be moistened as required.
  • the pressure vessel 1 is charged via an inlet with porous coating material.
  • the inlet can be formed, for example, by a removable lid of the container, which is closed again after being charged to the container with this pressure.
  • the inlet may be in the form of an opening at a suitable location on the container provided with a suitable valve connected to a conduit through which coating material is supplied.
  • the coating material according to step (b) of the method according to the invention by pressurization via the outlet 1 d (see FIG. 2 ), which is provided with a valve for opening and closing the outlet, is conveyed from the container into the conduit ( 4a, 4b ) to which a spraying apparatus 2 is connected.
  • the pressure plate 9 (see FIG. 2 ) , the pressure vessel is divided into a coating material space 1e and a pressure medium space 1f .
  • the pressure medium space With compressed air supplied via line 6 , this is set in motion, so that the coating material from the coating material space 1e in line 4a , 4b is conveyed.
  • the pressure plate can be moved mechanically or hydraulically.
  • more than one pressure vessel can be used and can be removed from this simultaneously or successively coating material. There are then other lines and valves that regulate the simultaneous or successive transport of the coating material from these containers.
  • the coating material according to step (c) of the method according to the invention is passed through a valve unit 3 according to the invention.
  • the valve unit has a longitudinal bore which forms a passageway 3a for the coating material. This is connected to lateral bores 3b and 3c , which form inlets for compressed air, so that the coating material is mixed in the passageway with the compressed air and swirled by them.
  • the inlets are provided with check valves 3e, 3f .
  • the compressed air is optionally a liquid, in particular water or water-containing materials, added and optionally further additives to be added to the coating material and the compressed air can be transported.
  • a suitable nebulizer (not shown in FIG. 1 ) can be used.
  • valve unit 3 can connect via a short line section 4a or directly to the pressure vessel.
  • the coating material is further conveyed by compressed air through line 4b to the injection apparatus.
  • the line 4a, 4b may be wholly or partly formed of rigid or flexible pressure-resistant material.
  • the conduit 4a may be made of stainless steel and the conduit 4b of a pressure-resistant flexible hose based on, for example, polyvinyl chloride.
  • hoses based on mixtures of PVC and silicone are suitable, which are in particular double-walled.
  • the tube materials are characterized in that they are smooth-walled and absorb moisture.
  • valve unit arranged line 4b For example, for the downstream of the valve unit arranged line 4b , a commercially available from the company Petzetakis Germany GmbH flexible hose based on PVC with the trade name Helivyl Buna Super Soft is used, which can be used over a temperature range of -30 ° C to + 80 ° C. and required resistance to weathering (ozone and UV, water, acids, alkalis, aging resistance).
  • Exemplary hose lengths are 1 to 50 m, preferably 10 to 40 m, z. B. 12 or 15 to 20 m.
  • the inner diameter of the lines of the system according to the invention can be in the range of a few mm to cm, depending on the overall dimensioning of the system.
  • the inner diameter is, for example, 10 to 20 mm.
  • a tube of the above type can be used, wherein the inner diameter is 13 mm.
  • Cables used for compressed air supply have diameters within the same order of magnitude as described above.
  • a line 8 for supplying compressed air to the injection apparatus from a conduit such as a hose having an inner diameter in the range of 5 to 20 mm, in particular 5 to 15 mm such as 9 mm exist.
  • step (d) of the method according to the invention the coating material is conducted into an inlet of a spraying apparatus 2 , which can be designed, for example, as a manual or automatic spray gun with a nozzle arrangement 2a , an actuating lever 2b and a pistol grip 2c .
  • the injection apparatus has a further inlet 2d for the supply of compressed air.
  • the compressed air is then brought into contact with the coating material in such a way that it can be atomized via the nozzle arrangement 2a and applied to the substrate to be coated in a suitable jet such as a flat jet or an omnidirectional jet.
  • the pressure control valve and pressure gauge 5 By the pressure control valve and pressure gauge 5 , the pressures in the pressure vessel 1 , in the coating material line 4a , 4b and in the compressed air lines 7 to the valve unit and 8 to the injection apparatus separately controllable, so that in each case the desired operating conditions can be adjusted.
  • the working pressures in the pressure vessel are generally in the range between 2 and 5 bar, in particular 2 to 4.5 bar, in the valve unit according to the invention in the range between 2 and 4 bar, in particular 2 to 3 bar, and in the injection apparatus in Range from 2 to 5 bar.
  • the working pressure in the pressure vessel and the pressure for the additional compressed air supply in the valve unit according to the invention between 1.5 and 3.0 bar, the pressure for the additional compressed air supply equal to or lower than the working pressure in Pressure vessel is.
  • the flow rate of the coating material is generally 0.25 to 10 kg / min., Which value depends on the pressures used in the individual plant areas and the dimensioning of the nozzle arrangement in the spraying apparatus.
  • the liquid consumption in the above conditions is about 0.05 to 1 kg / hour, this value also from the Dimensioning of the system and the pressures used in the individual plant areas and the nozzle assembly depends.
  • the process according to the invention is generally carried out at room temperature, i. H. carried out in a temperature range between 15 and 25 ° C. However, it may also be carried out at lower or higher temperatures as long as the conveyance of the coating material is given, e.g. in a temperature range of 5 to 15 ° C.
  • FIG. 2 shows an embodiment of the pressure vessel according to the invention with pressure plate 9 and outlet 1d, which leads into a coating material line 4a , which is connected to a valve 1b for controlling the outflow from the pressure vessel 1 .
  • the pressure vessel is subdivided into a coating material space 1e and a pressure medium space 1f .
  • the pressure plate is moved towards the outlet and so the coating material in line 4a transported.
  • FIG. 3 shows an enlarged view of an embodiment of the valve unit according to the invention, which is connected upstream via the valve 1b to a line 4a , in which the coating material from the outlet of the pressure vessel occurs.
  • the valve unit On the downstream side, the valve unit is connected to a conduit 4b leading to the injection apparatus.
  • the valve unit has a passage 3 a , which is laterally connected to bores 3 b and 3 c , which are provided on their outer side respectively with check valves 3 e and 3 f , are connected to the lines 7 a and 7 b , takes place via the compressed air supply.
  • the compressed air with liquid especially water, water-containing materials or other additives, which are conveyed by compressed air, are added.
  • the lateral bores 3b and 3c are arranged so that the supply of compressed air, the promotion of the material downstream of the injection apparatus supports.
  • the holes are arranged in particular at an angle ⁇ 90 °, preferably at an angle in the range of 20 to 60 °, in particular 30 to 50 °, such as 35 to 45 °.
  • the lateral bores are arranged opposite one another. As a result, a particularly favorable mixing and loosening of the material is achieved.
  • FIG. 3 Not shown in FIG. 3 is another connection that can be mounted on the top of the valve unit and the supply of detergent and / or water after the end of the operation of the system according to the invention, so that it can be cleaned and freed from coating material residues.
  • This further supply line is also provided with a suitable valve such as a check valve.
  • FIG. 4 shows a side view of a spray gun in the form of a handgun, which is equipped with a nozzle assembly 2a , an actuating lever 2b, an inlet for the coating material 2c and another inlet for compressed air 2d .
  • the handgun also has a suspension hook 2f .
  • FIG. 5 shows a side sectional view of the handgun after FIG. 4 .
  • the atomization is carried out, for example, by means of commercially available spray guns known to the person skilled in the art, which have suitable nozzle arrangements with internal and external atomization.
  • FIG. 6 shows an embodiment of the system according to the invention, in which it is arranged on a trolley.
  • a suitable embodiment of the trolley has a width 10 of 70 to 100 cm, a height 11 of 70 to 100 cm and a length 12 of 80 to 100 cm.
  • a housing is applied, within which the valve unit 3 according to the invention is housed.
  • On the top of the housing there are two pressure vessels, each having an outlet with adjoining material conduit, which are merged into a conduit connected to the valve unit (not shown in FIG FIG. 6 ).
  • connection 14 can be seen, to which a line 4 for conveying the coating material can be connected to a spraying apparatus.
  • Line 4 is in the in FIG. 6 shown embodiment designed as a flexible hose, which is shown in its storage position.
  • a container 15 is arranged on the trolley, in which a liquid such as water is stored for humidifying the compressed air and the to a compressed air line 7 (not shown in FIG FIG. 6 ) , which leads to the valve unit according to the invention.
  • the installation according to the invention can also be designed to be stationary, ie permanently at a specific location.
  • FIG. 7 is a three-dimensional view of the trolley according to FIG. 6 shown in particular inlet valves for the compressed air supply to the pressure vessels 1 are shown.
  • the pressure vessels 1 have on their upper side also via pressure gauges, which indicate the pressure in the pressure medium space. Otherwise, the explanations to FIG. 6 to get expelled.
  • the equipment according to the invention has been described above with respect to its use for the application of a porous coating material.
  • the system and in particular the arrangement of the valve unit according to the invention can also be used for other purposes in which a material delivery and compressed air supply are beneficial, as the plant of the invention allows.
  • the system can also be used to apply non-porous materials to substrates or to treat surfaces with materials which can be conveyed and applied by the system according to the invention, even if no lasting connection between the material and the treated substrate is associated with the application. z. B. because there is only a cleaning or polishing effect to be achieved.
  • Porous coating materials which can be conveyed with the system according to the invention and applied to substrates, as well as their preparation are described, for example, in US Pat EP 1 697 671 A1 and the WO 2003/097227 A1 described.
  • Other suitable materials are commercially available, e.g. From Worlee-Chemie GmbH, Hamburg, Germany.
  • the porous, liquid to pasty coating materials are generally aqueous dispersions of porous, i. Pore-containing solid particles before.
  • a coating material according to the invention comprises a liquid phase in which porous solid particles dispersed in airgel or xerogel particles of organic or inorganic materials are dispersed.
  • the consistency of this dispersion can be described as liquid to pasty, depending on the proportions of the solid and liquid components of the respective dispersion.
  • these coating materials may additionally contain gas bubbles (e.g., air-filled or air-filled gas bubbles) which create a foam-like structure.
  • gas bubbles e.g., air-filled or air-filled gas bubbles
  • the coating material according to the invention has a viscosity of 10,000 to 100,000 mPas, in particular 30,000 to 100,000 mPas, preferably 50,000 to 90,000 mPas, measured with a haake VT 500 viscometer, measuring device E 100, shear stress about 91 S -1 .
  • the coating materials in addition to the constituents that make up the porosity, more solid or liquid ingredients are added to give the desired properties such.
  • the substrates to be coated may form or form part of items such as roofs, exterior and interior walls of buildings or containers such as containers, tanks, pipelines, vehicle parts, marine components, plant components of the chemical industry and other industries. They may have already been coated with other materials prior to applying the coating of the invention, e.g. with paints.
  • the substrate comprises or consists of a material selected from the group consisting of glass, wood and wood-based materials, metals, in particular iron, steel and aluminum, in particular anodized aluminum, mineral building materials such as concrete, cement materials, tiles, stones, such as eg Limestone, ytong stone, ceramics, and plastics, in particular polyethylene, and copolymers thereof, and polymers suitable for use as paints, such as alkyd resins, and combinations thereof.
  • the porous solid particles of the coating material of the invention are formed from airgel or xerogel particles of organic or inorganic materials, e.g. Resorcinol-formaldehyde or melamine-formaldehyde airgel particles or metal oxide airgel particles (e.g., silica, titania and alumina aerogels).
  • airgel or xerogel particles of organic or inorganic materials e.g. Resorcinol-formaldehyde or melamine-formaldehyde airgel particles or metal oxide airgel particles (e.g., silica, titania and alumina aerogels).
  • the porous coating material which can be processed according to the invention preferably contains porous solid particles based on silica aerogels or xerogels, which may optionally be chemically modified.
  • the surface of the aerosols or xerogels is hydrophobically modified, in particular by silanization.
  • silica-based aerogels are hereafter also short Silica aerogels, suitable according to the invention. These materials have a density in the range of 100 to 140 kg / m 3 and a porosity of> 80%, in particular of> 90%.
  • the porosity is accompanied by a high internal surface area of about 600 to 800 g / m 2 , measured as the BET surface area, and a high oil absorption of about 500 to 700 g of DBP (dibutyl phthalate) per 100 g of solid particles.
  • DBP dibutyl phthalate
  • the porosity or degree of porosity means the percentage of pore volume in the total volume of the porous material.
  • a porous coating material based on silica aerogels or xerogels which can be processed according to the invention preferably has the following parameters, which relate to the material as starting material, ie. H. before application to substrates by the method described herein and subsequent drying to form an insulating layer.
  • the density of the material is generally 0.3 to 0.8 g / cm 3 , in particular 0.4 to 0.6 g / cm 3 , in particular 0.5 g / cm 3 .
  • the pH is generally in the range of 7 to 10, preferably 8 to 10, especially 8.3 to 8.5.
  • the total solids content ie the content of the dispersions of porous and non-porous solids, is generally in the range of about 50 to 90 wt .-%, preferably 60 to 80 wt .-%, in particular 65 to 75 wt .-% as about 67% by weight.
  • the content of porous solid particles is generally in the range of about 8 to 30 wt .-%, preferably 10 to 20 wt .-%, in particular 10 to 15 wt .-%.
  • the gas bubble content is generally in the range of 0 vol .-% to 50 vol .-%, preferably 10 vol .-% to 40 vol .-%, in particular 20 vol .-% to 30 vol .-%.
  • the gas bubble content is calculated by subtracting from the volume of the total formulation (calculated from mass * density) the volume fraction of the formulation constituents and placing it in relation to the total volume.
  • the water content of the formulation of the coating material is generally in the range of 20 to 50 wt .-%, preferably 25 to 40 wt .-%, in particular 30 to 35 wt .-% such as 32 wt .-%.
  • the coating material In addition to the porous solid constituent and a dispersant, in particular water, the coating material generally contains as further constituents at least one polymer or copolymer, in particular acrylate-based, and optionally further constituents such as emulsifiers, stabilizers, surfactants, pigments, flame retardant additives, corrosion inhibitors, etc.
  • the porous coating material is applied by means of the method according to the invention generally in layer thicknesses of up to 30 mm on a substrate.
  • the layer thickness is in the range of 10 mm to 100 .mu.m, in particular 5 mm to 500 .mu.m, based on the dried state, which is generally achieved by drying at room temperature within 24 hours after application. It can also be dried at elevated temperatures, eg at temperatures up to 120 ° C. In the not yet dried, ie wet state, the layer thicknesses are usually about 10 to 20% larger.
  • a coating material was prepared according to the following recipe.
  • Enova airgel 9.39 Silica airgel 7 WorléeAdd 8905 2.82 Alkaline ZnO solution 8th water 1.5 ⁇ 100.00
  • component 1 and component 2 were initially charged and homogenized with stirring. Then, constituent 3 and constituent 4 were slowly interspersed in portions with stirring and then dispersed with the dissolver under high shear. Thereafter, ingredient 5 was slowly interspersed in portions with slow stirring and homogenized using low gravitational forces. Subsequently, constituent 6 was slowly interspersed in portions with slow stirring and homogenized using low gravitational forces. Finally, ingredient 7 and ingredient 8 were allowed to flow in with slow stirring and homogenized using low gravitational forces.
  • the porous coating material Before the porous coating material was filled in the system, it was filled with water and rinsed. In addition to the pre-moistening of the pressure vessel 1 and the tubes 4a, 4b, the function of the individual components can be checked in this case.
  • the container or containers 1 were designed so that they could be filled with 2 liters of water each and then sealed.
  • the containers were pressurized with 0.5 bar.
  • the outlet valve 1b of the pressure vessels and the valve unit 3 according to the invention were opened and the lever 2b of the spray gun 2 was actuated.
  • the water was pushed through the system and exited the gun nozzle.
  • the compressed air supply via line 7 was opened, also with 0.5 bar.
  • the water was enriched with air from the nozzle.
  • the atomizing air supply 8 was opened and also set at 0.5 bar.
  • the air-enriched water sputtered out of the nozzle on the gun 2 . This process can serve both the pre-moistening of all relevant parts and the function check. After the container (s) were drained, the pressure was released.
  • coating material was filled in the pressure vessel 2 . Thereafter, the pressure plate 9 was placed on the material and the container / 2 closed. The material pressure and the compressed air supply 7 were set to 2.5 bar. Thereafter, the exhaust valve 1b was opened and the gun lever 2b was operated. If the material comes out of the nozzle of the gun 2 , the atomizing air was adjusted to 3.0 bar and the material was applied to a substrate.
  • suitable specimens were prepared from the coating material and the heat transfer coefficient and the thermal conductivity were measured.
  • the coating material was applied to a non-adhesive surface (eg made of Teflon) (wet about 12 mm layer thickness, dry about 10 mm layer thickness). After drying, the coating was removed from the substrate and square test specimens with 29 cm edge length were cut.
  • a non-adhesive surface eg made of Teflon
  • the heat transfer coefficient indicates the amount of heat that passes through 1 m 2 of a substance with a certain layer thickness when the temperature difference is 1 K. This value is thus layer thickness-dependent. It was measured according to the method described in DIN EN 12664. Thereafter, the heat transfer coefficient for a sample coated with a 10 mm thick layer of the above insulating material was 4.7 W / (m 2 ⁇ K).
  • the thermal conductivity is the ability of a substance to transport thermal energy by means of heat conduction in the form of heat. As a substance constant, this value is independent of the layer thickness.
  • the thermal conductivity of the sample layer mentioned above was 0.046 W / (m 2 ⁇ K), measured according to the method described in DIN EN 12664.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)

Claims (16)

  1. Procédé pour l'application par air comprimé d'un matériau de revêtement poreux sur un substrat, selon lequel :
    a) un matériau de revêtement, qui contient des particules solides poreuses formées de particules d'aérogel ou de xérogel composées de matériaux organiques ou anorganiques, est introduit par un orifice d'entrée dans au moins un réservoir sous pression,
    b) le matériau de revêtement est refoulé par un orifice de sortie dudit au moins un réservoir sous pression dans une conduite à laquelle un appareil de pulvérisation est raccordé,
    c) le matériau de revêtement étant guidé à travers une unité de soupape qui est agencée en aval dudit au moins un réservoir sous pression et en amont de l'appareil de pulvérisation et dans laquelle le matériau de revêtement est mélangé à l'air comprimé et le cas échéant à de l'air ou à des additifs contenant de l'eau,
    d) le matériau de revêtement ainsi traité est guidé dans un orifice d'entrée de l'appareil de pulvérisation,
    e) l'air comprimé est amené à l'appareil de pulvérisation par un autre orifice d'entrée, et
    f) le matériau de revêtement est atomisé à l'aide d'air comprimé et appliqué sur un substrat.
  2. Procédé selon la revendication 1, selon lequel le matériau de revêtement présente une porosité telle qu'il est adapté à être utilisé comme matériau isolant et la porosité du matériau de revêtement est maintenue pendant les étapes de procédé (a) à (f).
  3. Procédé selon la revendication 1 ou la revendication 2, selon lequel le matériau de revêtement contient des particules solides poreuses qui présentent une porosité > 80 %.
  4. Procédé selon l'une des revendications précédentes, selon lequel le matériau de revêtement présente une viscosité de 10 000 à 120 000 mPas, mesurée au moyen d'un viscosimètre Haake VT 500, dispositif de mesure E 100, une contrainte de cisaillement d'environ 91 S-1.
  5. Procédé selon l'une quelconque des revendications précédentes, selon lequel la pression dans le réservoir sous pression et l'appareil de pulvérisation atteint 2 à 5 bar et dans l'unité de soupape 2 à 3 bar.
  6. Procédé selon l'une quelconque des revendications précédentes, selon lequel le substrat comprend un matériau ou est constitué d'un matériau qui est choisi dans le groupe constitué du verre, du bois et de matériaux dérivés du bois, de métaux, de matériaux de construction minéraux ainsi que de matière plastique et de leurs combinaisons.
  7. Procédé selon l'une quelconque des revendications précédentes, selon lequel le matériau de revêtement est appliqué selon une épaisseur d'environ 50 µm à 30 mm sur le substrat et une couche isolante est ainsi produite.
  8. Installation d'application par air comprimé d'un matériau de revêtement qui contient des particules solides poreuses formées de particules d'aérogel ou de xérogel composées de matériaux organiques ou anorganiques, sur un substrat, laquelle installation :
    comprend au moins un réservoir sous pression dans lequel doit être introduit le matériau de revêtement, le réservoir sous pression comprenant un orifice d'entrée et un orifice de sortie pour le matériau de revêtement,
    comprend un appareil de pulvérisation servant à appliquer le matériau de revêtement poreux sur un substrat, l'appareil de pulvérisation comprenant un orifice d'entrée pour le matériau de revêtement, un autre orifice d'entrée pour l'amenée d'air comprimé et un ensemble de buses,
    une conduite, qui relie l'orifice de sortie de matériau de revêtement du réservoir sous pression à l'orifice d'entrée de matériau de revêtement de l'appareil de pulvérisation,
    une unité de soupape, qui est reliée à la conduite et qui est agencée en aval de l'orifice de sortie du réservoir sous pression et en amont de l'orifice d'entrée de l'appareil de pulvérisation, dans laquelle l'unité de soupape :
    comprend au moins un trou qui s'étend à travers l'unité de soupape dans la direction longitudinale et qui forme un canal de passage pour le transport du matériau de revêtement,
    comprend au moins un trou latéral, qui forme un orifice d'entrée pour l'amenée d'air comprimé mélangé le cas échéant à de l'eau ou à des additifs aqueux, ledit au moins un trou latéral étant relié au trou s'étendant dans la direction longitudinale, de sorte que le matériau de revêtement peut être mélangé à l'air comprimé dans le canal de passage,
    dans laquelle les trous latéraux sont pourvus chacun de clapets anti-retour.
  9. Installation selon la revendication 8, avec laquelle la conduite, qui relie le réservoir sous pression à l'appareil de pulvérisation, est réalisée sous la forme d'un tuyau flexible en amont et/ou en aval de l'unité de soupape.
  10. Installation selon la revendication 9, avec laquelle le tuyau flexible est constitué d'un matériau contenant du chlorure de polyvinyle.
  11. Installation selon l'une quelconque des revendications 8 à 10, avec laquelle l'unité de soupape comprend au moins un autre trou latéral, qui forme un orifice d'entrée pour l'eau aux fins de nettoyage et qui est relié le cas échéant au trou s'étendant dans la direction longitudinale.
  12. Installation selon l'une quelconque des revendications 8 à 11, dans laquelle l'unité de soupape :
    comprend deux trous latéraux, qui forment chacun des orifices d'entrée pour l'amenée d'air comprimé, l'air comprimé étant mélangé le cas échéant à de l'eau ou à des additifs aqueux, et qui sont en liaison fluidique avec le trou s'étendant dans la direction longitudinale, les deux trous latéraux étant ménagés en vis-à-vis côté droit et côté gauche,
    comprend un troisième trou latéral, qui forme un orifice d'entrée pour l'eau aux fins de nettoyage et qui est également en liaison fluidique avec le trou s'étendant dans la direction longitudinale, le troisième trou latéral étant ménagé côté supérieur ou côté inférieur.
  13. Installation selon la revendication 11 ou la revendication 12, avec laquelle ledit au moins un ou les deux trous latéraux, qui forment chacun des orifices d'entrée pour l'amenée d'air comprimé, l'air comprimé étant mélangé le cas échéant à de l'eau ou à des additifs aqueux, sont ménagés par rapport à la partie située en aval du trou s'étendant dans la direction longitudinale, lequel trou forme le canal de passage pour le matériau de revêtement, selon un angle aigu, de préférence selon un angle dans la plage de 20 à 60°, en particulier de 30 à 40°.
  14. Utilisation d'un matériau de revêtement tel que celui défini dans l'une des revendications 1 à 4 pour l'application par air comprimé sur un substrat selon l'une quelconque des revendications 6 à 7 au moyen d'un procédé tel que celui défini dans l'une des revendications 1, 2 et 5.
  15. Procédé d'isolation d'un objet, selon lequel une ou plusieurs surfaces à isoler de l'objet, en tant que substrat, sont revêtues d'après le procédé selon l'une quelconque des revendications 1 à 7.
  16. Utilisation d'une unité de soupape pour la commande du refoulement d'un matériau de revêtement, qui contient des particules solides poreuses formées de particules d'aérogel ou de xérogel composées de matériaux organiques ou anorganiques, l'unité de soupape étant réalisée comme cela est défini dans l'une des revendications 8 et 11 à 13.
EP13714914.2A 2012-04-13 2013-04-05 Installation et procédé d'application à commande pneumatique d'un matériau de revêtement poreux sur un substrat Not-in-force EP2836312B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13714914.2A EP2836312B1 (fr) 2012-04-13 2013-04-05 Installation et procédé d'application à commande pneumatique d'un matériau de revêtement poreux sur un substrat

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12164096 2012-04-13
PCT/EP2013/057254 WO2013153006A1 (fr) 2012-04-13 2013-04-05 Installation et procédé pour l'application par air comprimé d'un matériau de revêtement poreux sur un substrat
EP13714914.2A EP2836312B1 (fr) 2012-04-13 2013-04-05 Installation et procédé d'application à commande pneumatique d'un matériau de revêtement poreux sur un substrat

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EP2836312A1 EP2836312A1 (fr) 2015-02-18
EP2836312B1 true EP2836312B1 (fr) 2017-08-16

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CN106013743A (zh) * 2016-07-07 2016-10-12 洛阳高昌机电科技有限公司 一种可同时喷涂多种建筑涂料的喷涂装置
CN106824596A (zh) * 2016-12-28 2017-06-13 芜湖顺景自动化设备有限公司 一种带防腐蚀层的建筑涂装机装置
CN106866013B (zh) * 2017-01-20 2020-03-31 伊科纳诺（北京）科技发展有限公司 一种雾化吸附提高二氧化硅气凝胶水相分散性的方法
DE102018001800A1 (de) 2018-03-07 2019-09-12 Smart Material Printing B.V. Verfahren und Vorrichtung zur Reinigung von Gasen von Ammoniak oder Ammoniak und Noxen
CN108722719B (zh) * 2018-06-28 2021-05-25 芜湖扬展新材料科技服务有限公司 一种用于建筑涂料的高压喷涂装置
CN108816601A (zh) * 2018-07-05 2018-11-16 安徽知之信息科技有限公司 一种新能源汽车制造用节能喷漆装置
CN108952109B (zh) * 2018-07-24 2020-07-03 郑广耀 一种墙面涂料喷涂装置
CN111411762B (zh) * 2020-03-31 2021-06-01 重庆工程职业技术学院 用于建筑装饰的喷涂装置
CN112252676A (zh) * 2020-10-23 2021-01-22 湖南欧龙艺墅建筑材料有限公司 一种真石漆喷射装置

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