EP4127047A1 - Verwendung von ätherischen ölen zur auftrennung von klebungen - Google Patents
Verwendung von ätherischen ölen zur auftrennung von klebungenInfo
- Publication number
- EP4127047A1 EP4127047A1 EP21712177.1A EP21712177A EP4127047A1 EP 4127047 A1 EP4127047 A1 EP 4127047A1 EP 21712177 A EP21712177 A EP 21712177A EP 4127047 A1 EP4127047 A1 EP 4127047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- parts
- joined
- essential oil
- mixture
- 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.)
- Pending
Links
Classifications
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/412—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of microspheres
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
- C09J2301/502—Additional features of adhesives in the form of films or foils characterized by process specific features process for debonding adherents
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
- C09J2475/003—Presence of polyurethane in the primer coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/003—Presence of polysiloxane in the primer coating
Definitions
- EP-A-735121 describes an adhesive film section for a residue-free and damage-free and releasable bond consisting of a double-sided adhesive film with a handle protruding from the adhesive film, on which the bond can be released by pulling in the direction of the bond plane .
- this method can only be used if the adhesive layer of the adhesive film is a pressure-sensitive adhesive. With such adhesive connections, however, only low tensile or peel strengths can be achieved, so that this method can only be used for fixing small objects such as hooks and the like in the household sector.
- DE-A-42 30 116 describes an adhesive composition containing a blend of an aliphatic polyol with an aromatic dianhydride.
- This adhesive composition enables the bond to be dissolved in aqueous alkaline systems, specifically soda solutions or alkaline solutions. It is proposed to use these aqueous alkaline soluble adhesives for the efficient production of magnetic parts and other small parts, the adhesive only being used for the production of auxiliary adhesives during material processing.
- Very similar adhesives are also known as labeling adhesives, which allow the labels to be detached in an aqueous or aqueous alkaline environment in beverage bottles and similar containers.
- DE-A-43 28 108 describes an adhesive for floor coverings and a method for releasing these bonded floor coverings with the aid of microwave energy.
- the adhesive should be electrically conductive and softenable using a microwave device.
- Solvent-free contact adhesives based on (aqueous) polymer dispersions containing copper powder or aluminum powder are specifically proposed.
- the glued pieces of floor covering are to be placed in a microwave device to loosen the adhesive connection so that the adhesive layer can be softened so that the floor covering pieces can be pulled off manually after the adhesive layer has softened.
- WO 94/12582 describes a pressure-sensitive adhesive based on a mixture of an aqueous polymer dispersion and an adhesive dissolved in an organic solvent, as well as tackifiers and thickeners.
- This pressure-sensitive adhesive has a constant bond strength over a wide temperature range and enables the adhesive connections to be separated mechanically. It is stated that these adhesive connections are used for gluing insulating and / or decorative parts such as B. insulating materials or plastic films are suitable.
- DE-A-195 26 351 describes a release gel for varnishes, paints and adhesives based on organic solvents with the addition of network thickeners and other conventional agents.
- the use as a paint stripper for stripping two-component paints is mentioned as a specific field of application. Although it is mentioned that such mixtures are also suitable for use in 2-component adhesives, there is no concrete information about the release of such adhesive connections.
- WO 87/01724 describes a composition for removing cured polysulfide sealants or coatings.
- an alkali metal or ammonium thiolate based on alkyl or phenyl thiolates is dissolved in a solvent or solvent mixture consisting of dimethylformamide or dimethylacetamide or a mixture of these with aromatic solvents such as toluene or xylene and applied to cured polysulfide sealants or coating materials in order to subsequently remove them their substrates, such as B. to be able to remove aircraft tanks. Information on loosening adhesive bonds is not given.
- WO 99/07774 describes adhesives in which at least one structural component contains di- or polysulfide bonds and which can be released again after curing by applying solutions of cleavage agents based on mercapto compounds. This makes it possible to chemically separate bonded components in the bonded joint.
- the cleavage agent can also be added to the adhesive formulation in a form which is inert at room temperature, it being possible for the cleavage to take place after activation of the reagent at an elevated temperature. Concrete forms of this inert form of the splitting agent are not mentioned.
- EP 2 668 226 B1 discloses a separation medium for multilayer systems which consists of a nanoscale dispersion which contains an organic component, an aqueous component and a surfactant. The process aims to recycle photovoltaic modules.
- DE-A-199 24 138 describes adhesive compositions which contain nanoscale particles with ferromagnetic, ferrimagnetic, superparamagnetic or piezoelectric properties in the binder system. These adhesive compositions are suitable to be used for the production of releasable adhesive connections. Under the influence of electromagnetic radiation, these adhesive connections can be heated to such an extent that the adhesive connection can be easily detached.
- DE-A-35 01 490 describes a pane of glass glued into the frame of a car body using an elastomeric cross-linked adhesive.
- This disk has a conductive strip provided with power connections on its surface in the adhesive area, which carries a separating layer made of a thermally fusible material such as soft solder or thermoplastic on its side facing the adhesive. To release the adhesive connection, the conductive strip is energized, it heats up, the separating layer melts and the pane can be detached from the body.
- EP-A-0521825 describes a releasable adhesive connection in which the parts connected to one another are joined by means of an adhesive bead introduced between them.
- This bead of adhesive contains a flat thermoplastic separating element.
- This thermoplastic separating element contains intrinsically conductive polymers, electrically conductive carbon black, graphite, metal powder, metal fibers or metal needles, metal-coated fillers, metal-coated glass microspheres, metal-coated textile fibers or mixtures of these materials.
- the adhesive connection is heated by electricity or radiation, this thermoplastic separating layer is softened so that the parts connected to one another can be mechanically separated from one another.
- EP-A-521825 proposes the use of such releasable adhesive connections for direct glazing in vehicle construction.
- Multi-layer composites used for example for the packaging of food, consist of at least two two-dimensionally interconnected film layers.
- the films are, for example, polymer films made from polyethylene, polypropylene, polyester and polyamide, or aluminum films, or they consist of paper or vegetable fibers.
- Multi-layer composites usually contain a layer of printing ink that can be applied to the polymer films in frontal printing or reverse printing (https: //rocmpp.thicmc.dc/rocmpp4.0/do/data/RD-06-01930).
- the polymer films can also be vapor-coated with aluminum.
- inked or aluminized polymer films are considered to be a single layer.
- 2-ply (duplex composites) or 3-ply (triplex composites) are used for food packaging.
- multi-layer composites with more than three layers are also possible.
- the various layers are connected to one another over a large area by means of an adhesive polymer.
- an adhesive polymer for this purpose, 1-component or 2-component polyurethane adhesive polymers are used, which are applied as a solvent-free, solvent-based or aqueous adhesive to at least one of the layers to be connected before the layers to be connected are connected to one another.
- the coating weight of the adhesive polymer between two layers to be joined harbors depending on the type of adhesive between 0.5 g / m 2 and 5 g / m 2. Any solvent or water present in the adhesive are not included.
- Adhesion promoters for example based on polyurethane, can also be used analogously.
- co-extruded polymers such as the above-mentioned co-extruded polyolefin films with an ethylene vinyl alcohol inner layer.
- the adhesive or bonding agent is not regarded as a layer.
- the multi-layer composites have the disadvantage that they can only be separated into the individual film layers again with difficulty after the food has been consumed.
- the separation into the individual layers makes sense, however, so that the polymers or the aluminum can be returned to the recyclable material cycle again, sorted by type.
- the German Packaging Act prescribes a recycling rate of 63% for plastic packaging from 2022. It makes sense when recycling leads to high-quality and single-origin plastics.
- the layers In order to enable the individual film layers to be sorted according to type, the layers must be separated from one another. However, the separation of the layers is not trivial because the crosslinked adhesive polymers have only a low solubility.
- the patent EP 0 543 302 B1 discloses a process for the separation of aluminum foil and polyethylene or polyester foil under the action of fatty acids and in a closed container at 100.degree. C. to 122.degree.
- a disadvantage of this invention is the fact that only selected combinations of films can be separated. The use for the separation of all multilayer composites that are used for food packaging is not possible with this process.
- WO 2015/000681 A1 describes a solvent-based plastic recycling process with which the polymers can be recovered from plastic waste.
- the process is based on the use of thermal stabilizers in a paraffinic hydrocarbon mixture.
- the polymer dissolved in the hydrocarbon mixture at an elevated temperature precipitates on cooling.
- the polymer is separated mechanically and the hydrocarbon mixture present in the polymer is removed by applying a vacuum, e.g. in a vented extruder.
- the thermal stabilizer prevents polymer degradation of the dissolved polymer.
- the recovered polymer contains 50-100 ppm of the hydrocarbon mixture.
- US 2017/0080603 A1 describes a method for separating packaging materials, the separating liquid comprising a carboxylic acid and a swelling agent, the latter being a hydrocarbon solvent, such as toluene, xylene, ethylbenzene, cyclohexane or decalin, such as olefins, terpenes, ketones , Ethers or esters.
- a hydrocarbon solvent such as toluene, xylene, ethylbenzene, cyclohexane or decalin, such as olefins, terpenes, ketones , Ethers or esters.
- the process should be possible without the use of hazardous substances or highly flammable substances, it should be non-destructive with regard to the parts to be joined and effect the most effective possible, i.e. complete separation of the parts to be joined.
- the object was achieved by using a separating medium which contains at least one essential oil selected from the group consisting of phenols, phenylpropanoids and furanocoumarins, for separating parts to be joined together by adhesive bonds.
- the present invention relates to the use of a separating medium containing at least one essential oil or consisting of at least one essential oil selected from the group consisting of phenols, phenylpropanoids and furanocoumarins, for separating an assembly of parts to be adhered, containing or consisting of i) 2 parts to be joined together by an adhesive or an adhesive mixture, or ii) more than 2 parts to be joined together in that there is an adhesive or mixture of adhesives between 2 adjacent parts
- Adhesives or adhesive mixtures present between two adjacent parts connected to one another can be the same or different.
- Another object of the present invention is a method for separating an assembly of parts to be joined, containing or consisting of i) 2 parts to be joined together by an adhesive or an adhesive mixture, or ii) more than 2 parts to be joined together as a result are that between 2 adjacent parts to be joined there is an adhesive or an adhesive mixture, whereby the adhesives or adhesive mixtures present between 2 adjacent parts that are connected to one another can be the same or different, by treatment with a separating medium containing at least one essential oil or consisting of at least one essential oil selected from the group consisting of phenols, phenylpropanoids and furanocoumarins.
- the adhesives or adhesive mixtures present in each case between 2 adjacent parts that are connected to one another are preferably the same.
- an adhesive mixture is understood to mean 2 or more adhesives. These may or may not be mixed with one another. If there are 3 or more adhesives, it is also possible that some of the adhesives are mixed and the remainder of the adhesives are unmixed. This would be the case, for example, with an adhesive layer that was obtained by first applying a single adhesive to a part to be joined, to which two adhesives mixed with one another were then applied before the second part to be glued to the adhesive layer obtained in this way.
- a bond is defined according to EN 923 (German version EN 923: 2015) as a connection made with adhesive between parts to be joined.
- An adhesive is a non-metallic substance that is able to connect materials through surface adhesion and its internal strength (cohesion). It is therefore a process material that only develops its mechanical strength through a (physical or chemical) setting reaction during production and that is used in the bonding process to connect different parts to be joined.
- Joining parts means two or more workpieces (with a geometrically defined shape or shapeless materials) that are permanently connected to one another.
- a joining process is a process that is used to connect workpieces to one another over the long term.
- At least one primer for example a primer, adhesion promoter or primer
- at least one primer can be applied to the workpiece surfaces to improve the adhesion and / or the resistance of a bond before the adhesive is applied.
- Priming agents are applied to the surface of a component to be joined before the adhesive is applied, primarily to reduce the absorption capacity (absorption capacity) of the material to be joined.
- Primers or adhesion promoters are applied to the surface of the part to be joined, primarily to improve the adhesion and / or the durability of a bond before the adhesive is applied
- Primers, adhesion promoters and primers can set chemically or physically after application.
- the precoat, primer, primer, adhesion promoter refers to the state before as well as the state after setting (process in which an adhesive gains its cohesive strength and the bond develops its physical and chemical properties).
- the essential oil or the mixture of essential oils itself As a separating medium, the essential oil or the mixture of essential oils itself, a single-phase mixture of the essential oil or the mixture of essential oils with other substances or a multiphase composition containing the essential oil, for example an aqueous emulsion of the essential oil or the mixture of essential oils are used.
- the separation medium preferably consists of an aqueous emulsion of the essential oil or the mixture of essential oils.
- the separation medium contains an aqueous emulsion of the essential oil or the mixture of essential oils.
- the separation medium preferably does not contain any carboxylic acid.
- An aqueous emulsion is preferably used in the process which contains> 0.1% by volume, particularly preferably> 0.5% by volume, very particularly preferably> 1% by volume, even more preferably> 10% by volume of essential oil or . of essential oils, based on the volume of water used.
- Examples of essential oils from the group of phenols, phenylpropanoids and furanocoumarins are carveol, carvacrol, thymol, apiol, methyl trans-cinnamate, cis- and trans-anethole, dillapiol, estragole, eugenol, coriandrine.
- the essential oils can be of natural origin, i.e. obtained from plants or parts of plants, or they can be produced synthetically.
- the essential oil can also be chemically altered through oxidation, esterification or alkylation.
- the compound eugenol is particularly suitable.
- the above-mentioned essential oils from the group of phenols, phenylpropanoids and furanocoumarins or mixtures of these oils can also be used in the process according to the invention in admixture with essential oils from the substance groups of the acyclic and cyclic mono- and sesquiterpenes.
- Examples of acyclic and cyclic mono- and sesquiterpenes are ocimene, myrcene, limonene, a-terpinene, phellandrene, a-pinene, camphene, linalool, geraniol, menthol, sabinol, bomeol, neral, citronellal, carvone, menthone, camphor, Fenchone, menthofuran, cineol, anethofuran, geranyl acetate, linalyl acetate, bornyl acetate, isobomyl acetate, famesol, famesen, a-bisabolol, a-caryophyllene, chamazulene and ß-caryophyllene.
- the use of essential oils and mixtures of essential oils selected exclusively from the group of phenols, phenylpropanoids and furanocoumarins is preferred.
- the aqueous emulsion contains> 0.5% by volume, preferably> 0.9% by volume of a mixture of essential oils, based on the volume of water used, the volume fraction of eugenol in the mixture of essential oils at least (>) Is 1/3.
- the effectiveness of the process can be increased by adding surface-active substances, such as surfactants, emulsifiers, to the mixture of water and essential oil (s).
- the separating medium contains, in addition to at least one essential oil, substances such as solvents or plasticizers which can be mixed with this oil.
- the separating medium can be used to separate parts to be joined together by adhesives made of different materials, it being possible for the parts to be joined to consist of different or the same materials
- Suitable materials for producing the parts to be joined are, for example, plastics, organic materials, wood, paper, metals, and mineral substances such as concrete or plaster of paris.
- the parts to be joined can, for example, be in the form of foils, plates, foams, or they can have complex three-dimensional shapes.
- the parts to be joined can be flat, angular or point-wise connected to one another.
- Examples of materials that can be separated using the separating medium are multilayer composite materials, molded parts laminated with foils such as furniture parts, decorative parts for the car interior (interoir trim parts).
- the adhesives used to connect the parts to be joined can be made up of different basic chemical products. Examples of suitable adhesives are given in Chapter 2.3 of EN 923 (German version EN 923: 2015), the book “Kleben” by G. habenicht, 5th edition (ISBN 3-540-26273-3) 2005, Springer Verlag.
- polyurethane adhesives very particularly preferably polyurethane adhesives with polyester groups, are used.
- a primer (primer, adhesion promoter and / or primer) can be applied to at least one surface of the part to be joined before the adhesive is applied.
- the precoats that may be used can be made up of the same basic chemical products as the adhesives.
- silane-based primers or polyurethane-based primers such as silane primers or polyurethane primers, can be used as primers.
- Polyurethane-based precoats are preferred.
- the precoats used for bonding can be made up of the same or different basic chemical products as the adhesive (s) used for bonding.
- the precoat (s) and the adhesive (s) preferably differ with regard to their chemical structural components.
- Polyurethane-based precoats or adhesives are described in detail in the prior art, for example in Manufacturing Flexible Packaging, Thomas Dünn, ISBN 978-0-323-264-36-5, Ulrich Meier Westhues; Polyurethanes, lacquers, adhesives and sealants, ISBN 978-3-86630-896-1. This list is not to be regarded as restrictive.
- the adhesive (s) or primer (s) used can already contain the separating medium without the separating medium coming into contact with the adhesive (s) or primer (s).
- the adhesive (s) or primer (s) can contain the separating medium in encapsulated, preferably microencapsulated, form.
- the one adhesive is a polyurethane adhesive, preferably a polyurethane adhesive containing polyester groups, or the adhesive mixture is at least one polyurethane adhesive, preferably at least one Polyurethane adhesive containing polyester groups, contains, in the case of embodiment ii) at least one of the adhesives is a polyurethane adhesive, preferably a polyurethane adhesive containing polyester groups, and / or at least one of the adhesive mixtures contains a polyurethane adhesive, preferably a polyurethane adhesive containing polyester groups.
- an adhesive layer is understood to mean, for example, the flat, angular and / or punctiform application of the adhesive or the adhesive mixture to the part (s) to be joined.
- the materials to be separated are brought into contact with the separation medium for a certain time, preferably at least (>) 30 minutes, particularly preferably at least (>) 1 hour.
- This treatment weakens the strength of the adhesive and / or any existing precoat to such an extent that the parts to be joined by the adhesive can be separated by a slight mechanical load (for example, shear stress).
- the parts to be joined may be comminuted, for example by means of a cutting mill or a shredder.
- a cutting mill or a shredder By comminuting the multilayer composite, the area of contact between the separating medium and the adhesive or the precoat is increased. The penetration effect of the separating medium into the adhesive or precoat layer is thus improved and the weakening of the adhesive or precoat layer can be achieved more quickly.
- the materials to be separated can be brought into contact with the separating medium, for example by introducing the materials to be separated into the separating medium or by brushing the materials to be separated with the separating medium.
- the separating medium is already contained in the adhesive or precoat used, without the separating medium coming into contact with the adhesive or precoat.
- the adhesive or precoat can contain the separating medium in microencapsulated form.
- the separating medium is only released in the course of the process and brought into contact with the adhesive or precoat in which it is released from the encapsulation. For example, this can be done through mechanical stress or heating.
- the working method is possible in a batch process or in a continuous process.
- the separated materials are optionally separated from the separation medium by sieving, filtration or centrifugation. Materials that are still sticking to one another and which have not yet been completely separated from one another after the treatment with the separating medium can be separated from one another mechanically, e.g. by means of a pair of shearing rollers.
- the separation of the materials in a pure form can be done by the known separation processes, for example flotation, floating or settling behavior, by eddy currents (separation of aluminum).
- Adhering essential oil can either be washed off by a washing process with the use of suitable surfactants.
- Another object of the present invention is an assembly of parts to be joined, containing or consisting of a) i) 2 parts to be joined together by an adhesive or an adhesive mixture, or ii) more than 2 parts to be joined together, that between 2 adjacent joining parts there is an adhesive or an adhesive mixture, whereby the adhesives or adhesive mixtures present between 2 adjacent joining parts connected to one another can be the same or different, with embodiment i) and ii) optionally between at least one joining part and at least one Adhesive layer is additionally at least 1 pre-coat, preferably a silane-based pre-coat and / or a polyurethane-based pre-coat, b) a / a separating medium in encapsulated, preferably micro-encapsulated form, the encapsulated separating medium in at least one adhesive or a the Adhesive mixture connecting parts to be joined and / or optionally contained in at least one additionally contained pre-coat, and the separating medium contains at least one essential oil or consists of an essential oil selected from the group consisting
- Multi-layer composite 1 polyester / printing ink // aluminum // polyethylene
- Multi-layer composite 2 polyester / printing ink // polyethylene
- Polyester and printing ink are considered together as one layer.
- the multi-layer composites are cut into approx. 1 cm 2 squares with scissors. 10 pieces of the approx. 1 cm 2 multilayer composite are placed in a 250 ml multi-neck flask stirring apparatus with a stirrer, thermometer and reflux condenser, which is heated with an oil bath. 100 ml of water or 100 ml of water with 0.1 ml, 0.5 ml, 1 ml, 10 ml of the essential oils are filled into the stirring apparatus and heated to boiling temperature. The contents of the flask are refluxed at approx. 100 ° C. for up to 20 hours. The multilayer composites are visually checked for separation at 1-hour intervals.
- Both the terpenes and the phenylpropanoids have a separating effect, with the effect of the phenylpropanoids even exceeding that of the terpenes.
- the addition of 1% eugenol leads to a complete dissolution of the composite after just 3 hours. In pure water there is no separation of the composites even after 20 hours.
- 15mm wide and 20cm long strips of the multilayer composite are cut out of the packaging.
- the strips were boiled in 100 ml of water or in 100 ml of water mixed with 1 ml of eugenol or trans-anethole for 3 hours under reflux (pliable) in a 250 ml multi-necked flask stirring apparatus with reflux condenser. After boiling, the strips were removed from the apparatus and the bond strength measured within 30 minutes.
- the bond strength of the film layers was determined with the Zwick 5kN Allround table-top testing machine according to DIN 55533-5 in a 180 ° peel test. The loosened ends on 15mm wide strips of the film composite are clamped into the fastening clamps of the Zwick testing machine.
- test clamps are at a speed of 100mm / min. pulled apart.
- the values given are the mean values from five individual measurements.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20164802.9A EP3885404A1 (de) | 2020-03-23 | 2020-03-23 | Verwendung von mischungen ätherischer öle zur auftrennung von klebungen |
| PCT/EP2021/057041 WO2021191060A1 (de) | 2020-03-23 | 2021-03-19 | Verwendung von ätherischen ölen zur auftrennung von klebungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4127047A1 true EP4127047A1 (de) | 2023-02-08 |
Family
ID=69953828
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20164802.9A Pending EP3885404A1 (de) | 2020-03-23 | 2020-03-23 | Verwendung von mischungen ätherischer öle zur auftrennung von klebungen |
| EP21712177.1A Pending EP4127047A1 (de) | 2020-03-23 | 2021-03-19 | Verwendung von ätherischen ölen zur auftrennung von klebungen |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20164802.9A Pending EP3885404A1 (de) | 2020-03-23 | 2020-03-23 | Verwendung von mischungen ätherischer öle zur auftrennung von klebungen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12084600B2 (de) |
| EP (2) | EP3885404A1 (de) |
| CN (1) | CN115279829B (de) |
| WO (1) | WO2021191060A1 (de) |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3501490A1 (de) | 1985-01-18 | 1986-07-24 | Daimler-Benz Ag, 7000 Stuttgart | In den rahmen einer autokarosserie mittels eines elastomeren vernetzten klebers eingeklebte glasscheibe |
| WO1987001724A1 (en) | 1985-09-18 | 1987-03-26 | The Commonwealth Of Australia | Desealing compositions |
| US4882399A (en) | 1987-08-21 | 1989-11-21 | Polytechnic University | Epoxy resins having reversible crosslinks |
| DE59206897D1 (de) | 1991-07-03 | 1996-09-19 | Gurit Essex Ag | Lösbare Klebeverbindungen, Verfahren zu deren Herstellung und Verwendung von Vorrichtungen zum Lösen solcher Klebeverbindungen |
| DE4137895C2 (de) | 1991-11-18 | 2000-02-10 | Johannes Kersting | Verfahren zum Abtrennen von Aluminiumfolien von Kunststoffolien, insbesondere PE-Folien |
| DE4230116C2 (de) | 1992-09-09 | 1995-10-05 | Vacuumschmelze Gmbh | Wäßrig alkalisch löslicher Klebstoff und dessen Verwendung |
| DE9216278U1 (de) | 1992-11-25 | 1993-02-18 | Tenax GmbH Produkte und Systeme für Materialschutz, 2102 Hamburg | Mittel zum lösbaren Verbinden einer Karosseriefläche von Kraftfahrzeugen mit einem Dämm- und/oder Zierflächenteil |
| DE4328108A1 (de) | 1993-08-20 | 1995-02-23 | Dieter Klemm | Kleber für Bodenbeläge und Verfahren zum Lösen von Bodenbelag |
| DE4340087A1 (de) | 1993-11-24 | 1995-06-01 | Wilhelm Elges | Verfahren zum Trennen und Recyceln unterschiedlicher Kunststoffe und Mittel zum Lösen von Kunststoffen |
| DE4424143A1 (de) * | 1994-07-08 | 1996-01-11 | Wilhelm Elges | Verfahren zum Trennen und Recyceln unterschiedlicher Kunststoffe und Mittel zum Lösen von Kunststoffen |
| DE19511288C2 (de) | 1995-03-28 | 1997-04-03 | Beiersdorf Ag | Verwendung eines doppelseitig klebenden Klebfolien-Abschnittes für eine Fixierung oder Aufhängung eines Gegenstandes |
| DE19526351B4 (de) | 1995-07-19 | 2005-06-30 | Scheidel Gmbh & Co. Kg | Lösegel für Lacke, Farben und Kleber |
| DE19733643A1 (de) | 1997-08-04 | 1999-02-11 | Henkel Kgaa | Lösbare Klebstoffe |
| DE19904835A1 (de) * | 1999-02-08 | 2000-08-10 | Henkel Kgaa | Lösbare Klebstoffe |
| JP2000331384A (ja) * | 1999-05-20 | 2000-11-30 | Taiyo Yuden Co Ltd | 光情報媒体の基板回収方法 |
| DE19924138A1 (de) | 1999-05-26 | 2000-11-30 | Henkel Kgaa | Lösbare Klebeverbindungen |
| DE102011000322A1 (de) | 2011-01-25 | 2012-07-26 | saperatec GmbH | Trennmedium, Verfahren und Anlage zum Trennen von Mehrschichtsystemen |
| DE102013212813A1 (de) | 2013-07-01 | 2015-01-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Anreicherung von mindestens einem Polymer aus einem Polymer-haltigen Abfall und Polymer-Recyclat |
| GB2525858A (en) * | 2014-05-05 | 2015-11-11 | saperatec GmbH | Method and apparatus for recycling packaging material |
| JP6465917B2 (ja) * | 2017-03-31 | 2019-02-06 | ユニ・チャーム株式会社 | 使用済み吸収性物品から構成部材を回収する方法 |
| CN108724534A (zh) * | 2018-06-07 | 2018-11-02 | 界首市亚鑫塑业有限公司 | 一种去除废旧塑料瓶纸质标签的方法 |
| EP3885095A1 (de) * | 2020-03-23 | 2021-09-29 | Covestro Deutschland AG | Verwendung von mischungen aus wasser und ätherischen öl zur auftrennung von mehrschichtverbunden für das sortenreine recycling der polymer- bzw. metallfolien |
-
2020
- 2020-03-23 EP EP20164802.9A patent/EP3885404A1/de active Pending
-
2021
- 2021-03-19 EP EP21712177.1A patent/EP4127047A1/de active Pending
- 2021-03-19 WO PCT/EP2021/057041 patent/WO2021191060A1/de not_active Ceased
- 2021-03-19 US US17/912,139 patent/US12084600B2/en active Active
- 2021-03-19 CN CN202180023818.3A patent/CN115279829B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20230138157A1 (en) | 2023-05-04 |
| CN115279829A (zh) | 2022-11-01 |
| CN115279829B (zh) | 2025-02-11 |
| US12084600B2 (en) | 2024-09-10 |
| WO2021191060A1 (de) | 2021-09-30 |
| EP3885404A1 (de) | 2021-09-29 |
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