EP3576921A1 - Procédé et système de fabrication d'éléments composites expansés - Google Patents

Procédé et système de fabrication d'éléments composites expansés

Info

Publication number
EP3576921A1
EP3576921A1 EP18701200.0A EP18701200A EP3576921A1 EP 3576921 A1 EP3576921 A1 EP 3576921A1 EP 18701200 A EP18701200 A EP 18701200A EP 3576921 A1 EP3576921 A1 EP 3576921A1
Authority
EP
European Patent Office
Prior art keywords
reaction mixture
cover layer
discharge
mixing
distributor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18701200.0A
Other languages
German (de)
English (en)
Inventor
Uwe Kuenzel
Ralf Koester
Heinrich-Peter SOBIK
Thomas Rüb
Catherine LÖVENICH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covestro Deutschland AG
Original Assignee
Covestro Deutschland AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Covestro Deutschland AG filed Critical Covestro Deutschland AG
Publication of EP3576921A1 publication Critical patent/EP3576921A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2486—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device with means for supplying liquid or other fluent material to several discharge devices
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
    • 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
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
    • 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
    • B05B7/0018—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 with devices for making foam
    • 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
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
    • B29C44/321—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed part being a lining, e.g. a film or a support lining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • C08G18/22—Catalysts containing metal compounds
    • C08G18/225—Catalysts containing metal compounds of alkali or alkaline earth metals

Definitions

  • the present invention relates to a method and system for applying a foamable reaction mixture to a moving cover layer, wherein the reaction mixture is applied to the cover layer from discharge openings and the cover layer moves relative to the discharge openings at a speed of> 15 meters per minute.
  • Composite elements of a cover layer and an insulating core are used today in many industrial sectors.
  • the basic structure of such composite elements consists of a cover layer on which an insulating material is applied.
  • sheets of coated steel, stainless steel, aluminum, copper or alloys of the latter two can be used as cover layers.
  • insulation boards can be made from a combination of cover layers and insulating core. It can be plastic films, aluminum foil, wood, fiberglass or mineral fiber fleeces and cellulosic materials such as paper, cardboard or papier mache used as coverstock materials. Often multi-layer top layers of z. As aluminum and paper used.
  • the choice of suitable cover layer material depends on the intended field of application of the composite elements or insulation board and the resulting material requirements.
  • Foams based on polyurethane (PUR) and / or polyisocyanurate (PIR) can be used in particular as insulating core.
  • Insulation boards are often used in home or apartment construction.
  • composite elements for the insulation of, for example, cold stores, they are also increasingly used as facade elements on buildings or as elements of industrial doors such as sectional doors.
  • Corresponding composite elements hereinafter also referred to as sandwich composite elements, show by their cover layer a material and the corresponding stability of the surface design, while the applied foam gives corresponding heat insulating properties.
  • a foaming reaction mixture is applied by means of an application device to a provided cover layer.
  • an application device for example, when using foams based on isocyanates, the corresponding polyol components and isocyanate components are mixed together and applied to the cover layer, on which they foam and harden.
  • tubes are often used, which are provided along their longitudinal extent with a plurality of bores, from which the reaction mixture introduced into the tube can escape.
  • Such pipes are commonly referred to as casting rakes.
  • High-speed production processes for such composites, so-called high-speed machines, are known as "6-Finger Laydown.”
  • This process also known as “American” or “US” technology, uses three mixing heads with two discharge heads per mixing head here by the three product streams possibly very different order mixtures (reaction activity states) across the width of the production plant, which can lead to problems with, for example, Abbiäsern, voids, etc.
  • one often has problems with the running into and running each other of the ascending reaction mixture which In the case of three mixing heads with their six product streams, the hardened foam strands in the end product can still be visually perceived, which is regarded as disadvantageous.
  • EP 1 857 248 A2 describes an application device for producing foams that apply simultaneously and uniformly over the reaction surface, wherein the device comprises a mixing head, a distributor head, at least 3 or more discharge lines attached to the distributor head, which run transversely to the outflow direction on a frame is rigid, fixed, contains.
  • a device for the production of sand wich- composite elements or insulation boards is also disclosed, which at least two feeders for an upper and a lower cover layer, a circulating belt for guiding the cover layers, to which a coating device for a foamed core layer, a molding line and a cutting device behind the other WO 2010/089041 A2 discloses a device for applying foamable reaction mixtures comprising a mixing head, a distribution head lying downstream of the mixing head, at least three discharge lines attached to the distribution head, a supply line of a component A to the mixing head, a supply line of a component B to the mixing head, at least one static mixer for mixing an inert gas and the component A, the component B or a mixture of the components A and B, at least one supply line on the high pressure side for the under elevated pressure ine Gas and at least one measuring and control unit for setting the desired pressures of the components on the mixing head.
  • EP 2 233 271 A1 relates to a device for the application of intumescent reaction mixtures comprising (a) a mixing head for mixing raw materials for producing the foam, (b) a flow head behind the mixing head distributor head, (c) at least three attached to the distributor head hose lines and (d) at least three stationary casting rakes for applying the mixture of raw materials to foam on a moving topcoat.
  • EP 2 614 944 A1 describes a device for applying a foaming reaction mixture to a cover layer, in particular for producing a composite element, comprising at least one casting bar with a tubular hollow body, which hollow body extends along a central axis and has at least two outlet openings for exiting the foaming reaction mixture, and wherein the casting rake and the cover layer are movable relative to one another in a longitudinal axis.
  • the central axis of the at least one casting bar and the longitudinal axis of the movement enclose an angle of ⁇ 80 ° to one another.
  • EP 2 804 736 A1 discloses a device for applying an intumescent reaction mixture to a cover layer, in particular for producing a composite element, comprising at least two casting rakes each having a tubular hollow body, which hollow body extends along a central axis and has at least two outlet openings for exiting the intumescent reaction mixture wherein the G confuseharken and the cover layer are movable in a longitudinal axis relative to each other and wherein the G collectharken are arranged on a receiving element.
  • the arrangement of the casting rakes on the receiving element in each case has a joint by means of which the casting rakes are movably arranged on the receiving element and can be aligned at an angle of ⁇ 80 ° to the longitudinal axis of the movement.
  • the so-called calibration can be used. Although this results in a very high optical quality, but the mastery of the process in production is very difficult.
  • WO 2016/37842 A proposes the use of casting rakes, the geometry of which is designed by means of a simulation into which different parameters, e.g. Panel width, flow rate, speed of the production line and viscosity of the reaction mixture flow. It is obvious that this significantly reduces the flexibility of the application process when one or more parameters are to be changed.
  • the object of the present invention has been to at least partially overcome the disadvantages of the prior art. In particular, it has set itself the task of achieving a more homogeneous product quality across the width of an insulating board or a foam composite element.
  • the invention relates to a method for applying a foamable reaction mixture to a moving cover layer, wherein the reaction mixture is applied to the cover layer from discharge openings and the cover layer moves relative to the discharge openings at a rate of> 15 meters per minute, the reaction mixture being composed of> 7 discharge openings is applied simultaneously to the topcoat.
  • the process is much easier to control and results in a better product quality after a shorter start-up phase in production.
  • the process according to the invention is preferably a continuous process. It is suitable for the production of foam composite elements such as insulation boards in fast-moving production mode.
  • the cover layer speed is, for example,> 10 to ⁇ 70 meters per minute, preferably> 15 meters per minute, more preferably> 30 meters per minute.
  • cover layer or substrate are, for example, metal foils, in particular aluminum foils, multi-layer topcoats, z. As aluminum and paper, and plastic films.
  • the width of the cover layer is basically not limited.
  • the cover layer may have a width between 1000 and 1300 mm, but also 2400 mm width are possible.
  • the reaction mixture is in particular a reacting to a polyurethane and / or Polyisocyanuratschaum mixture.
  • the reaction mixture comprises a polyol A), a polyisocyanate B), optionally additives such. Stabilizers and catalysts, optionally one or more flame retardants and one (or more) blowing agents C).
  • the polyol A) is selected from the group of polyether polyols, polyester polyols, polycarbonate polyols and / or polyetheresterpolyols.
  • the OH number of the polyol used or of the polyols used can be, for example,> 100 mg KOH / g to ⁇ 800 mg KOH / g and the average OH functionality of the polyol used or of the polyols used is> 2.
  • the OH number gives in the case of a single polyol added its OH number. In the case of mixtures, the average OH number is given. This value can be determined using DIN 53240-2 (1998).
  • the average OH functionality of the polyols is, for example, in a range of> 2 to ⁇ 6.
  • polyether polyols are, for example, polytetramethylene glycol polyethers obtainable by polymerization of tetrahydrofuran by means of cationic ring opening.
  • suitable polyether polyols are addition products of styrene oxide, ethylene oxide, propylene oxide, butylene oxides and or epichlorohydrin to di- or polyfunctional starter molecules. Most often, polyether polyols are used with ethylene oxide or propylene oxide as the chain extender.
  • Suitable starter molecules are, for example, ethylene glycol, diethylene glycol, butyl diglycol, glycerol, diethylene glycol, trimethylolpropane, propylene glycol, pentaerythritol, sorbitol, sucrose, ethylenediamine, toluenediamine, triethanolamine, 1,4-butanediol, 1,6-hexanediol and low molecular weight, hydroxyl-containing esters of such polyols with dicarboxylic acids.
  • Useful polyester polyols include polycondensates of di- and tri- and tetraols and di- and tri- and tetracarboxylic acids or hydroxycarboxylic acids or lactones. Instead of the free polycarboxylic acids, it is also possible to use the corresponding polycarboxylic acid anhydrides or corresponding polycarboxylic acid esters of lower alcohols for the preparation of the polyesters.
  • suitable diols are ethylene glycol, butylene glycol, diethylene glycol, triethylene glycol, polyalkylene glycols such as polyethylene glycol, furthermore 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,3-butanediol, 1,6-hexanediol and isomers, Neopentyl glycol or hydroxypivalic acid neopentyl glycol ester.
  • polyols such as trimethylolpropane, glycerol, erythritol, pentaerythritol, trimethylolbenzene or trishydroxyethyl isocyanurate.
  • polycarboxylic acids examples include phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, cyclohexanedicarboxylic acid, adipic acid, azelaic acid, sebacic acid, glutaric acid, tetrachlorophthalic acid, maleic acid, fumaric acid, itaconic acid, malonic acid, suberic acid, 2-methylsuccinic acid, 3,3-diethylglutaric acid, 2 2-dimethylsuccinic acid, dodecanedioic acid,
  • Endomethylenetetrahydrophthalic acid, dimer fatty acid, trimer fatty acid, citric acid or trimellitic acid can be used.
  • the acid source used may also be the corresponding anhydrides.
  • monocarboxylic acids such as benzoic acid and hexanecarboxylic acid may additionally be used.
  • Hydroxycarboxylic acids which can be co-used as reactants in the preparation of a hydroxyl-terminated polyester polyol include, for example, hydroxycaproic acid, hydroxybutyric acid, hydroxydecanoic acid, hydroxystearic acid, and the like.
  • Suitable lactones include caprolactone, butyrolactone and homologs.
  • Useful polycarbonate polyols are hydroxylated polycarbonates, for example polycarbonate diols. These are by reaction of carbonic acid derivatives, such as diphenyl carbonate, dimethyl carbonate or phosgene, with polyols, preferably diols or from Carbon dioxide available.
  • carbonic acid derivatives such as diphenyl carbonate, dimethyl carbonate or phosgene
  • diols examples include ethylene glycol, 1,2- and 1,3-propanediol, 1,3- and 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, neopentyl glycol, 1,4-bis-hydroxymethylcyclohexane, 2- Methyl-l, 3-propanediol, 2,2,4-Trimethylpentandiol-l, 3, dipropylene glycol, polypropylene glycols, dibutylene glycol, polybutylene glycols, bisphenol A and lactone-modified diols of the type mentioned above.
  • polyether polycarbonate can be used become.
  • Useful polyetherester polyols are those compounds containing ether groups, ester groups and OH groups.
  • Organic dicarboxylic acids having up to 12 carbon atoms are suitable for preparing the polyetherester polyols, preferably aliphatic dicarboxylic acids having> 4 to ⁇ 6 carbon atoms or aromatic dicarboxylic acids, used singly or in admixture.
  • Examples which may be mentioned are suberic acid, azelaic acid, decanedicarboxylic acid, maleic acid, malonic acid, phthalic acid, pimelic acid and sebacic acid, and in particular glutaric acid, fumaric acid, succinic acid, adipic acid, phthalic acid, terephthalic acid and isoterephthalic acid.
  • suberic acid azelaic acid, decanedicarboxylic acid
  • maleic acid malonic acid
  • phthalic acid pimelic acid and sebacic acid
  • glutaric acid fumaric acid, succinic acid, adipic acid, phthalic acid, terephthalic acid and isoterephthalic acid.
  • glutaric acid fumaric acid
  • succinic acid adipic acid
  • phthalic acid terephthalic acid
  • isoterephthalic acid as derivatives of these acids, for example, their anhydrides and their esters and half esters with low molecular weight, mono
  • polyisocyanates B) are 1, 4-butylene diisocyanate, 1,5-pentane diisocyanate, 1,6-hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), 2,4- and / or 2,4,4-trimethylhexamethylene diisocyanate, the isomers Bis (4,4'-isocyanatocyclohexyl) methanes or mixtures thereof of any isomer content, 1,4-cyclohexylene diisocyanate, 1,4-phenylene diisocyanate, 2,4- and / or 2,6-toluene diisocyanate (TDI), 1,5-naphthylene diisocyanate, 2,2'- and / or 2,4'- and / or 4,4'-diphenylmethane diisocyanate (MDI) or higher homologs (polymeric MDI, pMDI), 1,3- and / or 1,4-bis (2
  • modified diisocyanates with uretdione, isocyanurate, urethane, carbodiimide, uretonimine, allophanate, biuret, amide, iminooxadiazinedione and / or oxadiazinetrione structure and unmodified polyisocyanate having more than 2 NCO groups per molecule such as 4-isocyanatomethyl-l, 8-octane diisocyanate (nonane triisocyanate) or triphenylmethane-4,4 ', 4 "triisocyanate are used.
  • the number of NCO groups in the isocyanate and the number of isocyanate-reactive groups lead to a ratio (index) of 110 to 600. Preferably between 115 and 400. This characteristic number can also be in a range from> 180: 100 to ⁇ 330: 100 or else from> 90: 100 to ⁇ 140: 100.
  • the reaction mixture also contains as much propellant C) as is necessary to achieve a dimensionally stable foam matrix and the desired bulk density. In general, these are 0.5 to 30 parts by weight of blowing agent based on 100 parts by weight of component A.
  • blowing agents preference is given to using physical blowing agents selected from at least one member of the group consisting of hydrocarbons, halogenated ethers and perfluorinated hydrocarbons having 1 to 8 carbon atoms.
  • physical blowing agents are understood as meaning those compounds which, owing to their physical properties, are readily volatile and do not react with the isocyanate component Pentane, cyclo-pentane, butane, isobutane), ethers (for example methylal), halogenated ethers, perfluorinated hydrocarbons having 1 to 8 carbon atoms (eg perfluorohexane) and mixtures thereof with one another (hydro) fluorinated olefins such as HFO 1233zd (E) (trans-1-chloro-3,3,3-trifluoro-1-propene) or HFO 1336mzz (Z) (cis- 1,1,4,4,4 , 4-hexafluoro-2-butene
  • cyclopentane is used as blowing agent C).
  • fluorocarbons which are preferably used are, for example, HFC 245fa (1,1,1,3,3-pentafluoropropane), HFC 365mfc (1,1,1,3,3-pentafluorobutane), HFC 134a or mixtures thereof. It is also possible to combine different propellant classes.
  • HFO 1233zd E
  • HFO 1336mzz Z
  • FA 188 of 3M (1,1, l, 2,3,4,5,5,5-nonafluoro-4 or 2) - (trifluoromethyl) pent-2-ene and / or 1,1,1,3 , 4,4,5,5,5-nonafluoro-4 (or 2) - (trifluoromethyl) pent-2-ene
  • additives such as FA 188 of 3M (1,1, l, 2,3,4,5,5,5-nonafluoro-4 or 2) - (trifluoromethyl) pent-2-ene and / or 1,1,1,3 , 4,4,5,5,5-nonafluoro-4 (or 2) - (trifluoromethyl) pent-2-ene
  • chemical blowing agents also called “co-blowing agents”
  • these being particularly preferably water and / or formic acid
  • the chemical blowing agents are used together with physical blowing agents will the co- - o -
  • Propellant in an amount of up to 6% by weight, particularly preferably 0.5 to 4% by weight for the composite elements, based on the total amount of compounds with isocyanate-reactive hydrogen atoms in component A.
  • Preferred is a mixture of 0 and 6 for composite elements , 0% by weight of co-blowing agent and 1.0 to 30.0% by weight of blowing agent, in each case based on 100% by weight of component A.
  • the ratio of co-propellant to blowing agent may also be from 1: 7 to 1:35 as needed.
  • the reaction mixture furthermore optionally contains a catalyst component D) which is suitable for catalyzing the blowing reaction, the urethane reaction and / or the isocyanurate reaction (trimerization).
  • the catalyst components can be metered into the reaction mixture or also completely or partially charged in the isocyanate-reactive component A).
  • Particularly suitable for this purpose are one or more catalytically active compounds selected from the following groups:
  • Amine catalysts e.g. Amidines, such as 2,3-dimethyl-3,4,5,6-tetrahydropyrimidine, tertiary amines, such as triethylamine, tributylamine, dimethylcyclohexylamine, dimethylbenzylamine, N-methyl, N-ethyl, N-cyclohexylmorpholine, ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylethylenediamine, ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylbutanediamine, N, N, N ', N'-tetramethylhexanediamine-1, 6, pentamethyldiethylenetriamine, bis (2-dimethylaminoethyl) ether, bis (dimethylaminopropyl) urea, dimethylpiperazine, 1,2-dimethylimidazole, N, N ', N "-tris- (dimethylaminopropy
  • Alkanolamine compounds such as tris (dimethylaminomethyl) phenol, triethanolamine, triisopropanolamine, N-methyl- and N-ethyl-diethanolamine, N, N-dimethylaminoethoxyethanol, ⁇ , ⁇ , ⁇ '-trimethylaminoethyl-ethanolamine and dimethylethanolamine.
  • the catalyst component one or more amine compounds according to the following structure:
  • R is independently selectable from any other R and represents an arbitrarily structured organic radical having at least one carbon atom.
  • R is an alkyl group having 1 to 12 carbon atoms, in particular C 1 to C 6 alkyl, more preferably methyl and Ethyl, especially methyl.
  • D2 carboxylates of alkali or alkaline earth metals, especially sodium acetate, sodium octoate, potassium acetate, potassium octoate, and tin carboxylates, e.g. , Tin (II) acetate, tin (II) octoate, tin (II) ethyl hexoate, tin (II) laurate, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin maleate and dioctyltin diacetate. and ammonium carboxylates. Particular preference is given to sodium, potassium and ammonium carboxylates.
  • the catalyst preferably contains one or more catalysts selected from the group consisting of potassium acetate, potassium octoate, pentamethyldiethylenetriamine, N, N ', N "-tris- (dimethylaminopropyl) hexahydrotriazine, tris (dimethylaminomethyl) phenol, bis [2- (N, N-) dimethylamino) ethyl] ether and ⁇ , ⁇ -dimethylcyclohexylamine, particularly preferably from pentamethyldiethylenetriamine, N, N ', N "-tris- (dimethylaminopropyl) hexahydrotriazine and N, N-dimethylcyclohexylamine, particularly preferably from pentamethyldiethylenetriamine, N, N' , N "-Tris- (dimethylaminopropyl) hexahydrotriazine and ⁇ , ⁇ -dimethylcyclohexyl
  • the reactivity of the reaction mixture is usually adjusted by means of catalyst (or other reactivity-increasing components, such as aminopoly ether), to the needs.
  • catalyst or other reactivity-increasing components, such as aminopoly ether
  • Typical parameters are the start time and setting time as a measure of the time at which the reaction mixture begins to react and at the time a sufficiently stable polymer network is formed.
  • Typical start times (characterized by the onset of reaction mixture foaming on visual assessment) for conventional processing are in the range of 2 seconds to 50 seconds.
  • Reaction mixtures with high or higher reactivities ie starting times of ⁇ 5 s, in particular ⁇ 2 s, very particularly ⁇ ls and setting times of ⁇ 25 s, in particular ⁇ 20 s and very particularly ⁇ 14 s, can now also be advantageously processed by means of the process according to the invention.
  • the method according to the invention may be advantageous, in particular, for the production of thin plates, since little material is available for the confluence here.
  • a combination of catalyst components D1 and D2 is used in the reaction mixture.
  • the molar ratio should be selected such that the ratio of D 2 / D 1 lies between 0.1 and 80, in particular between 2 and 20. Short setting times can be achieved, for example, with more than 0.9% by weight potassium 2. ethylhexanoate based on all components of the reaction mixture can be achieved.
  • the reaction mixture from> 7 discharge openings is applied simultaneously to the cover layer.
  • the reaction mixture of 8 discharge openings is preferably applied simultaneously to the cover layer, more preferably from> 12 discharge openings simultaneously applied to the cover layer, even more preferably from> 15 discharge openings.
  • the system according to the invention is suitable for carrying out the method according to the invention.
  • the system comprises> 7 discharge openings.
  • the system comprises> 8 discharge ports, more preferably> 12 and even more preferably> 15 discharge ports.
  • the system of the invention further comprises: a plurality of mixing heads 100, 110, 120, each mixing head being arranged to mix two or more reactant streams into a product stream;
  • a plurality of manifolds 200, 210, 220 wherein the number of manifolds corresponds to the number of mixing heads 100, 110, 120, each manifold is connected to a product stream of a mixing head, each manifold has> 2 flexible discharge conduits 300 each in a discharge port 400 ends and each distributor is set up to n to distribute a product stream from its associated mixing head with respect to the material composition homogeneously to its discharge lines 300.
  • Shown here is a system having three mixing heads 100, 110 and 120. Each of these three mixing heads receives a product stream with a polyol-containing component R-OH and a product stream with an isocyanate component R-NCO.
  • R-OH and R-NCO do not stand for monoalcohols and monoisocyanates, but generally for polyols and polyisocyanates and propellants and other additives which continue to be present in these educt streams.
  • the mixing heads 100, 110, 120 combine their educt streams into product streams which are each fed to a distributor 200, 210, 220 associated with the mixing head.
  • the product streams thus contain the foamable reaction mixture.
  • the distributors 200, 210, 220 used according to the invention are preferably those as described, for example, in EP 1 857 248 A2 ([0023], FIG. 1) under the name "distributor head". This is shown in more detail in FIG.
  • the geometry of the distributor is preferably selected so that the distance of the reaction mixture from the inlet of the distributor to the respective outlets to the outlet lines is the same length. Furthermore, it is advantageous if the cross section of the distributor head exits is identical for all distributor head outlets.
  • the cross section of the distributor head entrance can be larger than the respective distributor head exits.
  • the material of the distributor can be selected from steel, stainless steel, aluminum and plastics. In any case, the selected material must withstand the pressures and temperatures prevailing in the mixhead. If it is distributed over only two discharge lines, a T-shaped branch of the discharge line 310 can also be designated as the distributor. In this respect, in this embodiment, a piping branch such as a T-piece or a Y-piece may also be considered as a distributor. Homogenization of the product stream takes place in the distributors 200, 210, 220, so that, for example, differences in the temporal reaction progress or time-related differences in the properties of the educt streams are compensated for.
  • time-related differences in the properties of the reactant streams may be, for example, those differences that are based on density fluctuations or fluctuations in the flow rate of the educt streams to the mixing heads.
  • the reaction mixture leaves the manifolds 200, 210, 220 via ⁇ 2 flexible discharge lines 300, each terminating in discharge openings 400.
  • each distributor has five discharge lines 300, shown in FIG. 2 four discharge lines.
  • the discharge lines 300 may be flexible or rigid. Particularly preferred are flexible discharge lines, which are attached at their end facing away from the distributor on a mounting rail 500, whereby the Positions of the discharge openings 400 can be flexibly varied and fixed.
  • the flexibility of the discharge lines can be achieved, for example, by the use of hoses or variable, eg self-displaceable, tubes. This has the advantage that the exact position of the fixation, the geometry of the plate can be influenced. In a preferred embodiment, the distances between the hose ends on the rail are all the same.
  • the reaction mixture leaves the individual discharge openings 400 and makes contact with a cover layer 10, shown by its dashed outline and moving away from the discharge openings, over substantially its entire width.
  • a cover layer 10 shown by its dashed outline and moving away from the discharge openings, over substantially its entire width.
  • the individual strips of the reaction mixture combine to form the foam layer 600 on the cover layer 10.
  • cover layer 10 in each case moves away from the discharge openings, ie in the schematic representation of this figure upwards in the image.
  • the embodiment of the method according to the invention which can be carried out with the previously discussed system according to the invention further comprises the steps of: providing a plurality of mixing heads 100, 110, 120, each mixing head being arranged to mix two or more educt streams into one product stream;
  • each distributor has> 2 flexible discharge lines 300, each in one Discharge opening 400 ends and each distributor is arranged to distribute a product stream from its associated mixing head with respect to the material composition homogeneously on its discharge lines 300;
  • the number of mixing heads in these embodiments of the system and method according to the invention may be 2, 3 (as shown here), 4, 5, 6 or even greater. Accordingly, the number of distributors 2, 3 (as shown here), 4, 5, 6 or even greater, wherein the number of distributors also corresponds to the number of mixing heads.
  • the number of discharge lines per distributor may be 2, 3, 4 (as shown here), 5, 6 or even greater.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

La présente invention concerne un procédé et un système d'application d'un mélange réactionnel expansible sur une couche de recouvrement (10) en mouvement, le mélange réactionnel étant appliqué à partir d'ouvertures de sortie (400) sur la couche de recouvrement (10), cette dernière se déplaçant à une vitesse ≥ 15 mètres par minute par rapport aux ouvertures de sortie Le système comprend ≥ 7 ouvertures de sortie (400).
EP18701200.0A 2017-01-31 2018-01-30 Procédé et système de fabrication d'éléments composites expansés Withdrawn EP3576921A1 (fr)

Applications Claiming Priority (2)

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EP17154064 2017-01-31
PCT/EP2018/052241 WO2018141731A1 (fr) 2017-01-31 2018-01-30 Procédé et système de fabrication d'éléments composites expansés

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EP3576921A1 true EP3576921A1 (fr) 2019-12-11

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EP (1) EP3576921A1 (fr)
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CN109501736B (zh) * 2018-11-30 2020-05-08 温州陆华科技有限公司 一种汽车清洗装置
DE102019110091A1 (de) * 2019-04-17 2020-10-22 Hennecke Gmbh Verfahren zur Herstellung einer Isolationsplatte
CN114302795B (zh) * 2019-09-06 2024-06-18 陶氏环球技术有限责任公司 板构件生产线
EP3804939A1 (fr) 2019-10-11 2021-04-14 Covestro Deutschland AG Procédé et dispositif de fabrication d'éléments composites en mousse
IT202100006986A1 (it) * 2021-03-23 2022-09-23 Dallan Spa Impianto di schiumatura poliuretanica per doghe di tapparelle avvolgibili
FR3124531B1 (fr) * 2021-06-29 2024-06-28 Knauf Panneaux isolants thermiques et acoustiques
WO2023121907A1 (fr) * 2021-12-20 2023-06-29 Dow Global Technologies Llc Appareil et procédé d'application d'un mélange réactionnel moussant sur un laminateur à l'aide d'une buse divergente

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US4572435A (en) * 1984-05-30 1986-02-25 Owens-Corning Fiberglas Corporation Foamable liquid distributing means
US5846462A (en) * 1997-05-16 1998-12-08 Thompson; Edward J. Method and apparatus for making high compression structural foam
DE102006022760A1 (de) 2006-05-16 2007-11-22 Bayer Materialscience Ag Strang-Technik, Vorrichtung und Verfahren
EP2216156A1 (fr) 2009-02-05 2010-08-11 Bayer MaterialScience AG Dispositif haute pression
EP2233271A1 (fr) 2009-03-25 2010-09-29 Bayer MaterialScience AG Eléments composites en sandwich
BR112014017093A8 (pt) 2012-01-16 2017-07-04 Bayer Ip Gmbh preparações contendo emodepside amorfo
EP2614944A1 (fr) 2012-01-16 2013-07-17 Bayer Intellectual Property GmbH Dispositif d'application d'un mélange réactif moussant
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US10328450B2 (en) * 2014-09-11 2019-06-25 Huntsman International Llc Method of designing and manufacturing a distributor bar for applying a viscous foamable liquid mixture onto a laminator

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CN110214073A (zh) 2019-09-06
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