WO2011064230A1 - Beschichtungszusammensetzung für schaumstoffpartikel - Google Patents
Beschichtungszusammensetzung für schaumstoffpartikel Download PDFInfo
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- WO2011064230A1 WO2011064230A1 PCT/EP2010/068081 EP2010068081W WO2011064230A1 WO 2011064230 A1 WO2011064230 A1 WO 2011064230A1 EP 2010068081 W EP2010068081 W EP 2010068081W WO 2011064230 A1 WO2011064230 A1 WO 2011064230A1
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- coating composition
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/141—Preparation of hydrosols or aqueous dispersions
- C01B33/1415—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water
- C01B33/1417—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water an aqueous dispersion being obtained
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
- B29C67/205—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored comprising surface fusion, and bonding of particles to form voids, e.g. sintering
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/141—Preparation of hydrosols or aqueous dispersions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/224—Surface treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/22—After-treatment of expandable particles; Forming foamed products
- C08J9/228—Forming foamed products
- C08J9/232—Forming foamed products by sintering expandable particles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/038—Use of an inorganic compound to impregnate, bind or coat a foam, e.g. waterglass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/22—Thermoplastic resins
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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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Definitions
- the invention relates to a coating composition, coated foam particles, methods for producing foam moldings and their use.
- Particle foams are usually obtained by combining foam particles, for example prefoamed expandable polystyrene particles (EPS) or expanded polypropylene particles (EPP) in closed molds by means of steam.
- foam particles for example prefoamed expandable polystyrene particles (EPS) or expanded polypropylene particles (EPP) in closed molds by means of steam.
- EPS prefoamed expandable polystyrene particles
- EPP expanded polypropylene particles
- Flame-retardant polystyrene foams are generally equipped with halogen-containing flame retardants, such as hexabromocyclododecane (HBCD).
- halogen-containing flame retardants such as hexabromocyclododecane (HBCD).
- HBCD hexabromocyclododecane
- the approval as an insulating material in the construction sector is limited to certain applications.
- One of the reasons for this is the melting and dripping of the polymer matrix in case of fire.
- the halogen-containing flame retardants can not be used without restriction in terms of their toxicological properties.
- WO 00/050500 A1 describes flameproofed foams of prefoamed polystyrene particles which are mixed together with an aqueous sodium silicate solution and a latex of a high molecular weight vinyl acetate copolymer, poured into a mold and dried in air while shaking. This results in only a loose bed of polystyrene particles that are glued together at a few points and therefore have only insufficient mechanical strength.
- WO 2005/105404 A1 describes an energy-saving process for the production of foam moldings, in which the prefoamed foam particles are coated with a resin solution which has a lower softening temperature than the expandable polymer. The coated foam particles are then sealed in a mold using external pressure or by post-expansion of the foam particles with hot steam.
- WO 2007/023089 A1 describes a process for producing foam moldings from prefoamed foam particles which have a polymer coating.
- the preferred polymer coating used is a mixture of a waterglass solution, waterglass powder and a polymer dispersion.
- hydraulic binders based on cement or metal salt hydrates, for example aluminum hydroxide may be added to the polymer coating.
- a similar process is described in WO 2008/0437 A1, according to which the coated foam particles dried and then processed into a fire and heat resistant foam moldings.
- WO 00/52104 A1 relates to a fire-proofing layer-forming fire protection coating based on foam-forming and carbon-forming substances in the event of fire, which contains melamine polyphosphate as the blowing agent. Information on water resistance is not included.
- WO 2008/043700 A1 relates to a process for producing coated foam particles with a water-insoluble polymer film.
- WO 2009/0371 16 relates to a coating composition for foam particles containing a clay mineral, an alkali metal silicate and a film-forming polymer.
- Hydraulic binders such as cement bind in an aqueous slurry with carbon dioxide even at room temperature. As a result, embrittlement of the foam plate occur.
- the foam panels produced according to the cited prior art do not withstand temperatures of over 800 ° C in case of fire and collapse in case of fire.
- the known coating compositions are in need of improvement in view of the simultaneous improvement of flame / heat resistance and their water resistance in water exposure or in increased humidity. Many known materials lose their original shape after a short time in the case of direct water exposure. In addition, if a standard fire test is performed, such materials often completely lose their structural integrity. As a rule, this leaves powdery mixtures which no longer meet the technical requirements.
- WO / 2004/022505 describes the preparation of an agglomerate-free, ceramic nanoparticle dispersion which enables homogeneous and uniform distribution of the nanoparticles in material systems to be prepared or supplemented.
- EP1043094 A1 a Si0 2 dispersion is described as a binder. It is about processes for the production of castings and investment materials.
- DE 19534764 A1 describes thin, crack-free, preferably transparent and colorless SiO 2 films, a process for their preparation according to the sol-gel process and their use, for.
- US-A-3783020 describes anti-hygroscopic coating of electrodes with colloidal Si0 2 .
- the invention relates to a coating composition for coating foams containing a ceramic material a), optionally an alkali metal silicate b) and optionally a film-forming polymer c), characterized in that in addition nanosize Si0 2 particles d) are included.
- the ceramic materials to be used according to the invention ceramize in case of fire, that is to say not yet during the preparation of the coating compositions according to the invention and foam particles.
- Preferred ceramic materials are clay minerals and calcium silicates, in particular the mineral wollastonite.
- the coating composition is preferably used as an aqueous dispersion, wherein the water content including the water bound, for example, as water of crystallization is preferably in the range of 10 to 40, in particular 15 to 30 wt .-% based on the total aqueous dispersion.
- e) contains a hydrophobizing amount of a silicon-containing compound, in particular a silicone, in particular 0.2 to 5 parts by weight.
- this is a silicone emulsion with silicone particles of different sizes.
- a preferred coating composition contains a) 30 to 50 parts by weight of a ceramic material
- the amounts given above each refer to solids based on solids of the coating composition.
- the components a) to e) or a) to f) preferably add up to 100% by weight.
- the weight ratio of the ceramic material to alkali silicate in the coating composition is in the range of 1: 2 to 2: 1.
- a ceramic-forming clay minerals a) are particularly suitable allophane Al 2 [Si0 5] 0 3 ⁇ n H 2 0, kaolinite Al 4 [(OH) 8
- kaolin as a ceramic-forming calcium silicate in particular wollastonite is suitable.
- the coating composition contains as the filming polymer e) an uncrosslinked polymer having one or more glass transition temperatures in the range of -60 ° to + 100 ° C.
- the glass transition temperatures of the dried polymer film are preferably in the range from -30 ° to + 80 ° C., more preferably in the range from -10 ° to + 60 ° C.
- the glass transition temperature can be determined by differential scanning calorimetry (DSC, according to ISO 1 1357-2, heating rate 20 K / min) be determined.
- the molecular weight of the polymer film determined by gel permeation chromatography (GPC), is preferably below 400,000 g / mol.
- the coating composition preferably comprises as film-forming polymer an emulsion polymer of ethylenically unsaturated monomers such as vinylaromatic monomers, such as ⁇ -methylstyrene, p-methylstyrene, ethylstyrene, tert-butylstyrene, vinylstyrene, vinyltoluene, 1,2-diphenylethylene, 1,1-diphenylethylene, alkenes such as ethylene or propylene, dienes such as 1, 3-butadiene, 1, 3-pentadiene, 1, 3-hexadiene, 2,3-dimethyl butadiene, piperylene or isoprene, ⁇ , ß-unsaturated carboxylic acids such as acrylic acid and methacrylic acid , their esters, in particular alkyl esters, such as C1 -10-alkyl esters of acrylic acid, in particular the butyl esters, preferably n-butyl acrylate,
- the film-forming polymer is particularly preferably made up of one or more of the monomers styrene, butadiene, acrylic acid, methacrylic acid, C 1-4 -alkyl acrylates, C 1-4 -alkyl methacrylates, acrylamide, methacrylamide and methylolacrylamide.
- Suitable polymers c) are obtainable, for example, by free-radical emulsion polymerization of ethylenically unsaturated monomers, such as styrene, acrylates or methacrylates, as described in WO 00/50480.
- the polymers c) are prepared in a manner known per se, for example by emulsion, suspension or dispersion polymerization, preferably in the aqueous phase.
- the polymer can also be prepared by solution or bulk polymerization, optionally divided and the polymer particles subsequently dispersed in water in the usual way.
- the initiators, emulsifiers or suspension aids, regulators or other auxiliaries customary for the particular polymerization process are used with used; it is polymerized continuously or discontinuously at the usual temperatures and pressures for the respective process in conventional reactors.
- the nanoscale Si0 2 particles d) to be used according to the invention are preferably aqueous, colloidal SiO 2 particle dispersions. Preference is given to using an aqueous, colloidal SiO 2 particle dispersion which is stabilized by onium ions, in particular ammonium ions, such as NH 4 + as the counterion (alternatively also by alkali metal oxides of alkaline earth metal ions).
- the average particle diameter of the Si0 2 particles is in the range of 1 to 200 nm, preferably in the range of 10 to 50 nm.
- the specific surface of the Si0 2 particles is generally in the range of 10 to 3000 m 2 / g, preferably in the range of 30 to 1000 m 2 / g.
- the solids content of commercial Si0 2 particle dispersion depends on the particle size and is generally in the range of 10 to 60, preferably in the range of 30 to 50 wt .-%.
- Aqueous, colloidal Si0 2 particle dispersions can be obtained by neutralization of dilute sodium silicates with acids, ion exchange, hydrolysis of silicon compounds, dispersion of fumed silica or gel precipitation.
- the nanoscale Si0 2 particles to be used according to the invention are known per se and can be present in different forms depending on the production process.
- suitable dispersions can be obtained, for example, based on silica sol, silica gel, pyrogenic silicas, precipitated silicas or mixtures thereof.
- silica sols are colloidal solutions of amorphous silica in water, also referred to as silica sols or silica sols.
- the silica is in the form of spherical and surface-hydroxylated particles.
- the surface of the Si0 2 particles may have a charge which is balanced by corresponding counterions.
- Alkaline-stabilized silica sols generally have a pH of 7 to 1 1, 5 and may be alkalized, for example, with alkali or nitrogen bases.
- the silica sols may also be weakly acidic as colloidal solutions.
- the surface of the brine can be covered with aluminum compounds, for example.
- the particles can be present both as so-called primary particles and in the form of secondary particles (agglomerates).
- the mean particle size specified here according to the invention means the mean particle size determined by means of ultracentrifugation and includes the size of primary particles and any agglomerates present therefrom.
- silicon dioxide dispersions are used in which the Si0 2 particles are present as discrete, uncrosslinked primary particles.
- the silicone e) to be used according to the invention is preferably an aqueous silicone emulsion.
- at least one of the following constituents is contained in the silicone emulsion: silicic acid dietho- xyloctylsilyltrimethylsilyl ester or dimethylsiloxane with aminoethylaminopropylsilsesquioxane (hydroxy-limited) or triethoxyoctylsilane.
- an infrared-absorbing pigment such as carbon black, coke, aluminum, graphite or titanium dioxide
- IR absorber such as carbon black, coke, aluminum, graphite or titanium dioxide
- the particle size of the IR-absorbing pigment is generally in the range of 0.1 to 100 ⁇ , in particular in the range of 0.5 and 10 ⁇ .
- the BET surface area is preferably in the range of 10 to 120 m 2 / g.
- the graphite used is preferably graphite having an average particle size in the range from 1 to 50 ⁇ m.
- the coating composition flame retardants, such as expanded graphite, borates, in particular zinc borates, in particular ortho-boron phosphate, or intumescent compositions which inflate when exposed to higher temperatures, usually over 80 to 100 ° C, swell, or foam, and a insulating and heat-resistant foam, which protects the underlying insulating foam particles from the effects of fire and heat.
- flame retardants in the polymer coating it is also possible to achieve adequate fire protection with foam particles containing no, especially no halogenated flame retardants, or to get by with smaller amounts of flame retardants, since the flame retardant concentrated in the polymer coating on the Surface of the foam particles is located and forms a solid scaffolding net when exposed to heat or fire.
- the coating composition may, as additional additives, cleave intumescent compositions containing chemically bound water, or at temperatures above 40 ° C, such as metal hydroxides, metal salt hydrates, and metal oxide hydrates.
- Suitable metal hydroxides are in particular those of groups 2 (alkaline earth metals) and 13 (boron group) of the Periodic Table. Preferred are magnesium hydroxide, calcium hydroxide, aluminum hydroxide and borax. Particularly preferred is aluminum hydroxide.
- Suitable metal salt hydrates are all metal salts in whose crystal structure water of crystallization is incorporated. Likewise suitable metal oxide hydrates are all metal oxides which contain water of crystallization incorporated into the crystal structure. The number of crystal water molecules per formula unit may be the maximum possible or below, z. As copper sulfate pentahydrate, trihydrate or monohydrate. In addition to the water of crystallization, the metal salt hydrates or metal oxide hydrates may also contain constitutional water.
- Preferred metal salt hydrates are the hydrates of metal halides (especially chlorides), sulfates, carbonates, phosphates, nitrates or borates. Suitable examples are magnesium sulfate decahydrate, sodium sulfate decahydrate, copper sulfate pentahydrate, nickel sulfate heptahydrate, cobalt (II) chloride hexahydrate, chromium (III) chloride hexahydrate, sodium carbonate decahydrate, magnesium chloride hexahydrate, and the tin borate hydrates. Magnesium sulfate decahydrate and tin borate hydrates are particularly preferred.
- metal salt hydrates are double salts or alums, for example those of the general formula: M'M ' ⁇ SCU ⁇ ⁇ 12 H 2 O.
- M 1 z.
- M 1 for example, aluminum, gallium, indium, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, rhodium or iridium.
- metal oxide hydrates z.
- the coating may additionally be supplemented with other minerals, for example cements, aluminum oxides, vermicullite or perlite. These may be incorporated into the coating composition in the form of aqueous slurries or dispersions. Cements can also be applied by "powdering" on the foam particles. The water necessary for setting the cement can then be supplied with steam during sintering.
- the coating composition is used in particular for coating foam particles.
- the invention therefore furthermore relates to a process for producing coated foam particles by applying the coating composition according to the invention, preferably in the form of an aqueous dispersion, to the foam particles and optionally drying.
- Expanded polyolefins such as expanded polyethylene (EPE) or expanded polypropylene (EPP) or prefoamed particles of expandable styrene polymers, in particular expandable polystyrene (EPS), can be used as the foam particles.
- the foam particles generally have a mean particle diameter in the range of 2 to 10 mm.
- the bulk density of the foam particles is generally 5 to 100 kg / m 3 , preferably 5 to 40 kg / m 3 and in particular 8 to 16 kg / m 3 , determined according to DIN EN ISO 60.
- the foamed particles based on styrene polymers can be obtained by prefetching EPS with hot air or steam in a prefoamer to the desired density. By prefoaming once or several times in a pressure or continuous prefoamer, final bulk densities of less than 10 g / l can be obtained.
- athermal solids such as carbon black, aluminum, graphite or titanium dioxide
- the foam particles may contain from 3 to 60% by weight, preferably from 5 to 20% by weight, based on the prefoamed foam particles, of a filler.
- Suitable fillers are organic and inorganic powders or fibrous materials, as well as mixtures thereof.
- organic fillers z As wood flour, starch, flax, hemp, ramie, jute, sisal, cotton, cellulose or aramid fibers are used.
- carbonates, silicates, barite, glass beads, zeolites or metal oxides are used.
- powdery inorganic substances such as talc, chalk, kaolin (Al 2 (Si 2 0 5 ) (OH) 4 ), aluminum hydroxide, magnesium hydroxide, aluminum nitrate, aluminum silicate, barium sulfate, calcium carbonate, calcium sulfate, silica, quartz powder, Aerosil®, alumina or Spherical or fibrous inorganic materials such as glass beads, glass fibers or carbon fibers.
- the mean particle diameter or, in the case of fibrous fillers, the length should be in the range of the cell size or smaller. An average particle diameter in the range from 1 to 100 ⁇ m, preferably in the range from 2 to 50 ⁇ m, is preferred.
- inorganic fillers having a density in the range from 1.0 to 4.0 g / cm 3 , in particular in the range from 1.5 to 3.5 g / cm 3 .
- the whiteness / brightness (DIN / ISO) is preferably 50-100%, in particular 60-98%.
- the type and amount of fillers can affect the properties of the expandable thermoplastic polymers and the particle foam moldings obtainable therefrom.
- adhesion promoters such as maleic anhydride-modified styrene copolymers, epoxy-group-containing polymers, organosilanes or styrene copolymers with isocyanate or acid groups, can significantly improve the binding of the filler to the polymer matrix and thus the mechanical properties of the particle foam moldings.
- inorganic fillers reduce flammability.
- inorganic powders such as aluminum hydroxide, magnesium hydroxide or borax, the fire behavior can be further improved.
- Such filler-containing foam particles can be obtained, for example, by foaming filler-containing, expandable thermoplastic granules. At high filler contents required for this expandable granules by extrusion blowing agent-containing thermoplastic melts and subsequent pressurized underwater granulation such. As described in WO 2005/056653.
- the polymer foam particles can additionally be equipped with flame retardants.
- flame retardants may contain from 1 to 6% by weight of an organic bromine compound, such as hexabromodylcododecane (HBCD) and optionally additionally from 0.1 to 0.5% by weight of dicumyl or a peroxide in the interior of the foam particles or the coating.
- HBCD hexabromodylcododecane
- dicumyl or a peroxide in the interior of the foam particles or the coating.
- no halogen-containing flame retardants are used.
- the coating composition according to the invention is preferably applied to the foam particles in the form of an aqueous polymer dispersion.
- the water glass powder contained in the coating mixture leads to a better or faster filming and thus a faster curing of the foam molding.
- additional hydraulic binders based on cement, lime cement or gypsum may be added in amounts at which no appreciable embrittlement of the foam occurs.
- Conventional methods such as spraying, dipping or wetting the foam particles with an aqueous coating composition in conventional mixers, spray devices, dipping devices or drum apparatuses, can be used to coat the foam particles.
- the foam particles coated according to the invention can additionally be coated with amphiphilic or hydrophobic organic compound.
- the coating with hydrophobing agent is expediently carried out before the application of the aqueous coating composition according to the invention.
- the hydrophobic organic compounds are in particular C1 0 - C 30 - paraffin waxes, reaction products of N-methylolamine and a fatty acid derivative, reaction products of a C 9 Cn oxo alcohol with ethylene oxide, propylene oxide or butylene oxide or polyfluoroalkyl (meth) acrylates or mixtures thereof to name, which can be preferably used in the form of aqueous emulsions.
- Preferred hydrophobizing agents are paraffin waxes having 10 to 30 carbon atoms in the carbon chain, which preferably have a melting point between 10 and 70 ° C, in particular between 25 and 60 ° C.
- paraffin waxes are contained, for example, in the BASF commercial products RAMASIT KGT, PERSISTOL E and PERSISTOL HP, as well as in AVERSIN HY-N from Henkel and CEROL ZN from Sandoz.
- Suitable hydrophobizing agents are resinous reaction products of an N-methylolamine with a fatty acid derivative, e.g. Example, a fatty acid amide, amine or alcohol, as z.
- a fatty acid derivative e.g. Example, a fatty acid amide, amine or alcohol
- Their melting point is generally 50 to 90 ° C.
- Such resins are for. B. in BASF's commercial product PERSISTOL HP included.
- polyfluoroalkyl (meth) acrylates are suitable, for example Polyperfluoroctylacrylat. This substance is contained in the BASF commercial product PERSISTOL O and in OLEOPHOBOL C from Pfersee.
- Suitable coating agents are antistatic agents, such as emulsifier K30 (mixture of secondary sodium alkanesulfonates) or glycerol stearates, such as glycerol monostearate GMS or glycerol tristearate.
- emulsifier K30 mixture of secondary sodium alkanesulfonates
- glycerol stearates such as glycerol monostearate GMS or glycerol tristearate.
- the method according to the invention is distinguished by the fact that the coating materials which are customary for the coating of expandable polystyrene, in particular stearates, can be used to a reduced extent or eliminated altogether, without negatively influencing the product quality.
- the foam particles provided with the coating according to the invention can be sintered in a mold. The coated foam particles can be used while still wet or after drying.
- the drying of the coating composition applied to the foam particles can take place, for example, in a fluidized bed, paddle dryer or by passing air or nitrogen through a loose bed.
- a drying time of 5 minutes to 24 hours, preferably 30 to 180 minutes at a temperature in the range of 0 to 80 ° C, preferably in the range of 30 to 60 ° C is sufficient for the formation of the water-insoluble polymer film.
- the water content of the coated foam particles after drying is preferably in the range from 1 to 40 wt .-%, more preferably in the range of 2 to 30 wt .-%, most preferably in the range of 5 to 15 wt .-%. It can be determined, for example, by Karl Fischer titration of the coated foam particles.
- the weight ratio of foam particles / coating mixture after drying is preferably 2: 1 to 1:10, particularly preferably 1: 1 to 1: 5.
- the foam particles dried according to the invention can be sintered in conventional molds with hot air or steam to give foam moldings.
- the pressure can be generated for example by reducing the volume of the mold by means of a movable punch.
- a pressure in the range from 0.5 to 30 kg / cm 2 is set here.
- the mixture of coated foam particles is filled into the opened mold.
- the foam particles are pressed with the stamp, wherein the air between the foam particles escapes and the gusset volume is reduced.
- the foam particles are connected by the coating to the foam molding.
- a compression takes place about 10 to 90%, preferably 60 to 30%, in particular 50 to 30% of the initial volume.
- a pressure of 1 to 5 bar is usually sufficient for this purpose.
- the mold is designed according to the desired geometry of the foam molding.
- the degree of filling depends, inter alia, on the desired thickness of the later molded part.
- foam boards a simple box-shaped form can be used.
- the compression can z. B. by shaking the form, tumbling or other suitable measures.
- hot air or water vapor can be pressed into the mold or the mold heated.
- any heat transfer media such as oil or steam can be used.
- the hot air or the mold is suitably tempered for this purpose to a temperature in the range of 20 to 120 ° C, preferably 30 to 90 ° C.
- the sintering can be carried out continuously or discontinuously under the action of microwave energy.
- microwaves in the frequency range between 0.85 and 100 GHz, preferably 0.9 to 10 GHz, and irradiation times between 0.1 and 15 minutes are used. It is also possible to produce foam boards with a thickness of more than 5 cm.
- hot air or steam at temperatures in the range of 80 to 150 ° C or by irradiation of microwave energy usually forms an overpressure of 0.1 to 1, 5 bar, so that the method is carried out without external pressure and without volume reduction of the mold can be.
- the internal pressure resulting from higher temperatures allows the foam particles to be easily further expanded, whereby they can also weld themselves by softening the foam particles themselves, in addition to bonding via the polymer coating.
- the gussets disappear between the foam particles.
- the shape can also be heated with a heat transfer medium as described above. When microwaves are irradiated, the inorganic coating constituents are generally heated, which then crosslink or condense more quickly as a result.
- the prefoamed and coated foam particles may be continuously applied to the lower of two metal bands, which may optionally have a perforation, and processed with or without compression by the converging metal bands into endless foam sheets.
- the volume between the two belts is progressively reduced, compressing the product between the belts and eliminating the gussets between the foam particles. After a curing zone, an endless plate is obtained.
- the volume between the bands can be kept constant and pass through a zone with hot air or microwave irradiation, in which the foam particles re-foam. Again, the gussets and an endless plate disappear will be received. It is also possible to combine the two continuous process operations.
- the thickness, length and width of the foam sheets can vary within wide limits and is limited by the size and closing force of the tool.
- the thickness of the foam sheets is usually 1 to 500 mm, preferably 10 to 300 mm. Further preferred sizes and order ranges are 10 to 200 mm, preferably 20 to 1 10 mm, particularly preferably 25 to 95 mm.
- the density of the foam moldings according to DIN 53420 is generally 10 to 150 kg / m 3 , preferably 20 to 90 kg / m 3 . With the method it is possible to obtain foam moldings with uniform density over the entire cross section.
- the density of the edge layers corresponds approximately to the density of the inner regions of the foam molding.
- the process can also be used crushed foam particles made of recycled foam moldings.
- the comminuted foam recycled to 100% or z. B. in proportions of 2 to 90 wt .-%, in particular 5 to 25 wt .-% are used together with virgin material, without significantly affecting the strength and mechanical properties.
- the coating may also contain other additives which preferably or only slightly contribute to the combustibility and / or substances which in the non-fired state have a positive influence on the mechanical or thermal properties, for example vermiculites, in addition to the mechanical and hydraulic properties to modify
- a preferred method comprises the steps: i) prefoaming of expandable styrene polymers into foam particles, ii) applying the coating composition according to the invention in the form of an aqueous dispersion to the foam particles,
- a particularly preferred method involves the compression of the still water-moist foam particles according to the following method: i) prefoaming of expandable styrene polymers into foam particles, ii) applying the coating composition according to the invention in the form of an aqueous dispersion to the foam particles,
- the coating compositions according to the invention are suitable for the production of simple or complex foam moldings, such as plates, blocks, tubes, rods, profiles, etc. Preference is given to producing sheets or blocks which can subsequently be sawn or cut into sheets.
- panels and blocks can be used in building construction to insulate exterior walls. They are particularly preferably used as the core layer for the production of sandwich elements, for example so-called structural insulation panels (SIP), which are used for the construction of cold stores or warehouses.
- SIP structural insulation panels
- Test A To test the quality of the samples, a series of tests were carried out: Test A
- the volume loss in case of fire was determined.
- a cube with 5 cm edge length was sintered for 15 minutes at 1030 ° C, or 800 ° C in a muffle furnace.
- the cubic volume was then determined again and subtracted from the initial value.
- test B the leaching of the cubes was determined.
- a cube of 5 cm edge length was completely immersed in 50 ° C warm water and completely wetted with water for 24 hours. Afterwards, the cube was weighed again after drying and thus the proportion of leached coating was determined. The water in the container was evaporated and the residue was weighed to give a more accurate reading.
- polystyrene foam particles (10 g / L, Neopor ® 2300) were indicated by the in Table2 coating in the specified weight ratio there EPS: coated mix homogeneously. The coated particles were then filled into an aluminum mold (20 x 20 cm) and pressed under pressure to 50% of the original volume. The examination of the samples obtained was carried out as described under "Test Methods".
- the column EPS / Mix means the weight ratio of the inorganic components to the foam.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2012126601/05A RU2012126601A (ru) | 2009-11-27 | 2010-11-24 | Композиция для нанесения покрытия на частицы пенопласта |
US13/512,149 US20120270052A1 (en) | 2009-11-27 | 2010-11-24 | Coating composition for foam particles |
EP10782276A EP2504140A1 (de) | 2009-11-27 | 2010-11-24 | Beschichtungszusammensetzung für schaumstoffpartikel |
CN2010800594353A CN102712117A (zh) | 2009-11-27 | 2010-11-24 | 用于泡沫粒子的涂料组合物 |
AU2010323202A AU2010323202A1 (en) | 2009-11-27 | 2010-11-24 | Coating composition for foam particles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09177310 | 2009-11-27 | ||
EP09177310.1 | 2009-11-27 |
Publications (1)
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WO2011064230A1 true WO2011064230A1 (de) | 2011-06-03 |
Family
ID=43480913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/068081 WO2011064230A1 (de) | 2009-11-27 | 2010-11-24 | Beschichtungszusammensetzung für schaumstoffpartikel |
Country Status (7)
Country | Link |
---|---|
US (1) | US20120270052A1 (de) |
EP (1) | EP2504140A1 (de) |
KR (1) | KR20120102729A (de) |
CN (1) | CN102712117A (de) |
AU (1) | AU2010323202A1 (de) |
RU (1) | RU2012126601A (de) |
WO (1) | WO2011064230A1 (de) |
Cited By (5)
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---|---|---|---|---|
US20120301700A1 (en) * | 2011-05-27 | 2012-11-29 | Sto Ag | Method for manufacturing a formed body with a cavity structure for sound and/or heat insulation and formed body for sound and/or heat insulation |
WO2017167650A1 (de) * | 2016-03-30 | 2017-10-05 | Evonik Röhm Gmbh | Verkürzung der abkühlphase beim partikelschäumen durch die wärmeleitung erhöhende additive |
DE102019127721A1 (de) * | 2019-10-15 | 2021-04-15 | Kurtz Gmbh | Verfahren zum Herstellen eines Partikelschaumstoffteils |
CN115066471A (zh) * | 2020-01-31 | 2022-09-16 | 陶氏环球技术有限责任公司 | 经涂覆的聚氨酯泡沫 |
CN115651524A (zh) * | 2022-10-12 | 2023-01-31 | 华南理工大学 | 一种高强度自清洁聚氨酯防水涂料及其制备方法 |
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EP2295699A2 (de) * | 2009-07-27 | 2011-03-16 | Schlegel Systems, Inc. | Intumeszierende Dichtung |
JP6211913B2 (ja) * | 2013-12-11 | 2017-10-11 | 株式会社ジェイエスピー | ポリオレフィン系樹脂発泡粒子 |
KR20160117498A (ko) * | 2014-02-03 | 2016-10-10 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 발포 수지 성형용 금형 및 그 제조 방법 |
KR101575989B1 (ko) * | 2014-12-24 | 2015-12-09 | 고영신 | 팽창흑연을 이용한 경량화된 흡음내화 단열재 및 그 제조방법 |
ITUB20153233A1 (it) * | 2015-08-26 | 2017-02-26 | A P I Applicazioni Plastiche Ind S P A | Procedimento per la produzione di disposizioni di particelle di polimeri espansi; disposizioni di particelle di polimeri espansi e relativi articoli |
CN105694684A (zh) * | 2016-04-25 | 2016-06-22 | 重庆市森宝木胶有限公司 | 泡沫板、泡沫型材保护剂及其制备方法 |
CN114426746A (zh) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | 一种聚苯乙烯保温材料的制备方法 |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120301700A1 (en) * | 2011-05-27 | 2012-11-29 | Sto Ag | Method for manufacturing a formed body with a cavity structure for sound and/or heat insulation and formed body for sound and/or heat insulation |
US8784709B2 (en) * | 2011-05-27 | 2014-07-22 | Sto Se & Co. Kgaa | Method for manufacturing a formed body with a cavity structure for sound and/or heat insulation and formed body for sound and/or heat insulation |
WO2017167650A1 (de) * | 2016-03-30 | 2017-10-05 | Evonik Röhm Gmbh | Verkürzung der abkühlphase beim partikelschäumen durch die wärmeleitung erhöhende additive |
DE102019127721A1 (de) * | 2019-10-15 | 2021-04-15 | Kurtz Gmbh | Verfahren zum Herstellen eines Partikelschaumstoffteils |
WO2021073923A1 (de) | 2019-10-15 | 2021-04-22 | Kurtz Gmbh | Verfahren zum herstellen eines partikelschaumstoffteils |
CN115066471A (zh) * | 2020-01-31 | 2022-09-16 | 陶氏环球技术有限责任公司 | 经涂覆的聚氨酯泡沫 |
CN115066471B (zh) * | 2020-01-31 | 2023-12-29 | 陶氏环球技术有限责任公司 | 经涂覆的聚氨酯泡沫 |
CN115651524A (zh) * | 2022-10-12 | 2023-01-31 | 华南理工大学 | 一种高强度自清洁聚氨酯防水涂料及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
CN102712117A (zh) | 2012-10-03 |
AU2010323202A1 (en) | 2012-07-19 |
KR20120102729A (ko) | 2012-09-18 |
EP2504140A1 (de) | 2012-10-03 |
US20120270052A1 (en) | 2012-10-25 |
RU2012126601A (ru) | 2014-01-10 |
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