Debondable goods by usage of a thermally lable sacrificial layer in combination with an adhesive

Abstract

The present invention relates to a composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C. Furthermore, the present invention relates to a process for preparing said composite and a process comprising separating said composite into its parts by applying debonding conditions (CD).

Description

Debondable goods by usage of a thermally lable sacrificial layer in combination with an adhesiveThe present invention relates to a composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C. Furthermore, the present invention relates to a process for preparing said composite and a process comprising separating said composite into its parts by applying debonding conditions (CD).Producing articles from different parts by gluing these parts is a well-known process in industry. Since environmental awareness has raised during the last years the decomposition of articles is becoming more and more important.Consumer good manufactures increasingly demand concepts to increase sustainability by in-creasing recycle rates of used bonded articles. For example, high performance sport shoes are often based on thermoplastic or thermoset polymers such as thermoplastic or thermoset polyurethanes which are bonded to other materials, for example nonpolyurethane materials such as ethylene-vinyl acetate, polyester textiles or synthetic leather. The non-polyurethane materials have to be removed after the life cycle of the article by a debonding on demand mechanism be-fore recycling and re-use of the thermoplastic polymers, in particular the thermoplastic polyurethane. Also separation of crosslinked polyurethanes and subsequent recycling of separated cross-linked polyurethane foams is possible via glycolysis.Similar needs exist in other technical areas to release bonded components of different materials to be able to separately recycle the different materials, for example car seats or instrumental boards, dashboards, meat or cheese food packaging etc. WO 2019 / 175151 A1 for example de-scribes a method for making thermoplastic polyurethanes from recycled polyurethane materials. This method requires debonding non-polyurethane materials from the polyurethane materials. WO 2018 / 156689 describes de-bondable adhesives and uses thereof for making and debonding articles of footwear. Debonding is achieved by use of carboxylic acids and salts thereof and by use of microwave irradiation. However, to allow for debonding of an adhesive, complete reformulation of the whole adhesive is required, which is often not desired.There remains a need for improved methods particularly that facilitate the recycling of composites, in particular composites which comprise different materials which have to be separated prior to a recycling process. The composites should, under normal storage, use and cleaning conditions, exhibit high resistance to premature debonding. It is a challenge to provide materials with high bond strength during regular use of the articles but which when subjected to stimulation by suitable conditions are easily debonded on demand in short time for recycling purposes.It was a further object of the present invention to provide materials which are suitable for bonding two or more components and allow for the debonding of the respective articles obtained. This also allows to reuse the components without complete decomposition of the respective components.The problem is solved in accordance with the invention by a composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, preferably with a softening temperature in the range of from 40 °C to 200 °C.It has been found that composites can be prepared according to the present invention which can be debonded using mild conditions. This allows to separate the parts and reuse or recycle the separate parts.According to the present invention, the composite comprises a layer (LL) and an adhesive layer (LA). Layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C. Layer (LL) may also comprise further components which are preferably admixed with the polymer for example in a suitable composition. Preferably, the polymer composition comprises a thermoplastic polymer with a softening temperature in the range of 40 to 200 °C.In the context of the present invention, the term "softening temperature” refers to the melting temperature (Tm) if the polymer is crystalline and a melting temperature can be detected. In case the polymer is amorphous and no melting temperature can be detected, it refers to the glass transition temperature (Tg), or the glass transition temperatures if more than one is detectable.The melting temperature and the glass transition temperature are measured in four cycles following ASTM D 3418 by using an Hitachi TA7000 instrument. A sample of 5-10 mg is prepared and sealed in an aluminum crucible. After each heating or cooling step, the temperature is hold for 5min. Four cycles are conducted: Cycle 1 and 2 start at - 70°C up to a temperature which is > 30 °C of the expected Tm (Melting temperature) with a heating Ramp of 10K / min followed by a cooling ramp to -70°C. Cycle 2 is used to evaluate Tm and cycle 1 discarded. Cycle 3 and 4 start at -70°C up to a temperature which is > 30 °C of the expected Tm with a heating Ramp of 20K / min followed by a cooling ramp to -70°C with 50K / min. Cycle 4 is used to evaluate the Tg and cycle 3 discarded.The layer (LL) may comprise further components such as for example further thermoplastic polymers, solvents or additives. The softening point of the polymer, in particular the thermoplastic polymer typically has to be adapted to allow bonding of the parts without affecting the surface or the properties of the parts which form the article according to the present invention. Bonding is preferably achieved by physical softening at elevated temperatures and re-solidi- fication on cooling according to the present invention.The thermoplastic polymer may also be denoted as hotmelt adhesive in the context of the present invention. Bonding is achieved by physical softening at elevated temperatures and re-crystallization on cooling.A hotmelt adhesive typically is solid at room temperature, solvent-free and meltable above room temperature. The hotmelt adhesive generally is an unreactive thermoplastic. Hot-melt adhesives (HMA) are adhesive systems which are solid at room temperature, become tacky or sticky upon heating and soften to a liquid or fluid state. They typically solidify rapidly upon cooling at ambient temperatures to develop internal strength and cohesion. Hotmelt adhesives are one-part, solvent free thermoplastic adhesives which are characterized by low to medium viscosity when applied at the required dispensing temperature. Once applied, hotmelt adhesives cool and solidify to form a strong bond between articles. Bonds formed with thermoplastic hotmelt adhesives are reversible. Under sufficiently high thermal stress, thermoplastic hot-melt adhesives will liquefy and lose their cohesive strength.It was surprisingly found that the flow beginning temperature (Tfb) of the thermoplastic polymer has an influence on the bonding and debonding properties of the layer (LL). The adjustment of the flow beginning temperature in a suitable range can be used to influence the temperature behavior of the adhesive strength to obtain good bonding properties under conditions of usage of an article but also to allow for easy debonding using comparatively mild conditions.It has been surprisingly found that an advantageous combination of good bonding and debonding using mild conditions can be achieved using a composition comprising a thermoplastic polymer which has a flow beginning temperature (Tfb) of at least 50 °C.According to the present invention, the thermoplastic polymer preferably has flow beginning temperature (Tfb) measured according to QK4-73004 in the range from 50 °C to 170 °C, preferably from 60 °C to 160 °C, more preferably from 70 °C to 160 °C, more preferably from 70 °C to 150 °C, most preferably from 80 °C to 150 °C. According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the thermoplastic polymer has a flow beginning temperature (Tfb) measured according to QK4-73004 in the range of from 50 °C to 170 °C.Preferably, the thermoplastic polymer, used according to the present invention, has a relatively low softening temperature and also a low flow beginning temperature, which allows them to be used as adhesives, without damaging the different parts to be bonded during application.The layer (LL) can include a variety of polymers commonly used in adhesive. For example, thermoplastic polymer may be selected from a polyurethane, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, a polyester, a polyether, a copolymer thereof, and any combination thereof. In some aspects, the polystyrene is or includes a polystyrene block copolymer. Suitable polystyrenes can include poly(styrene-isoprene-styrene), poly(styrene-butadiene-styrene), poly(styrene-ethylene-butene-styrene), and a poly(styrene-ethylene-propene) and any combination thereof.In some aspects, the thermoplastic polymer may be selected from a thermoplastic polyurethane, a thermoplastic polyamide, a thermoplastic polyolefin, a thermoplastic polyester, a thermoplastic polyether, a thermoplastic copolymer thereof, and any combination thereof. In some aspects, the composition includes a polyolefin such as a polyethylene, a polypropylene, a copolymer thereof, or any combination thereof. The polyolefin can be an ethylene copolymer. In some aspects, the composition includes a thermoplastic polyolefin. The thermoplastic polyolefin, in some aspects, includes a thermo-plastic polyethylene, a thermoplastic polypropylene, a thermoplastic copolymer thereof, or any combination thereof. The thermoplastic polyolefin can include a thermoplastic ethylene copolymer. In some aspects, the thermoplastic ethylene copolymer is ethylene vinyl acetate (EVA).According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, polyester, polycarbonate, polyethyleneterephthalate, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, polyvinylacetate, polyvinylpyrrolidone, rubber or a mixture thereof. According to a further embodiment, the present invention is also directed to a composite as disclosed above, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, or a mixture thereof.According to one embodiment, the layer (LL) preferably comprises a thermoplastic polyurethane. According to a further embodiment, the present invention is also directed to a composite as disclosed above, wherein the thermoplastic polymer is a thermoplastic polyurethane.Suitable thermoplastic polyurethanes typically comprise the reaction-product of a polyisocyanate component, a polyol component, and optionally a chain extender component. The reaction may or may not be carried out in the presence of a catalyst. According to a further embodiment, the present invention is also directed to a composite as disclosed above, wherein the thermoplastic polyurethane of the layer (LL) is the reaction-product of the building components a polyol, an isocyanate and eventually a chain extender.The starting materials are preferably selected to adjust the softening temperature and the flow beginning temperature of the thermoplastic polyurethane. The flow beginning temperature may for example be adjusted by reducing the hard segment content of the thermoplastic polyurethane.According to the present invention, also mixtures of polyols or mixtures of chain extenders may be used to adjust the flow beginning temperature. Also, the structure of the polyol might be adjusted by choosing suitable monomers or mixtures of monomers to influence the flow beginning temperature. Furthermore, the molecular weight and / or chain length of the chain extender used may be adjusted to influence the flow beginning temperature.Adjustment of the molecular weight of the thermoplastic polyurethane by choosing a suitable molar ratio of the NCO / OH groups also influences the flow beginning temperature. According to the present invention, also two or more of these adjustments can be used to achieve an ideal combination of hardness, flow beginning temperature, and other properties.According to a further embodiment, the present invention is also directed to a composite as dis-closed above, wherein the isocyanate is an aromatic isocyanate, an aliphatic isocyanate, an alicyclic isocyanate, and combinations thereof.The isocyanate component may comprise one or more polyisocyanates. In some useful embodiments, the polyisocyanate component includes one or more diisocyanates. Suitable polyisocya-nates include aromatic diisocyanates, aliphatic diisocyanates, cyclo aliphatic diisocyanates or combinations thereof. In some embodiments, the polyisocyanate component includes one or more aromatic diisocyanates. In some embodiments, the polyisocyanate component is essentially free of, or even completely free of, aliphatic diisocyanates. In other embodiments, the polyisocyanate component includes one or more aliphatic diisocyanates and / or cyclo aliphatic diisocyanates. In some embodiments, the polyisocyanate component is essentially free of, or even completely free of, aromatic diisocyanates. In some embodiments, mixtures of aliphatic and aromatic diisocyanates may be useful. Examples of useful polyisocyanates include aromatic diisocyanates such as 4,4'-methylenebis(phenyl isocyanate (4,4'-MDI), 2,4-diphenylmethane diisocyanate (2,4-MDI), 2,2'-diphenylmethane diisocyanate (2,2'-MDI), m-xylene diisocyanate (XDI), phenylene-1 ,4-diisocya- nate (1 ,4-PDI), naphthalene-l,5-diisocyanate (NDI), 4,4'-diisocyanato-1 ,2-diphenylethane, 3,3'-dimethyl-4,4'-bi- phenylene diisocyanate (TODI) and toluene diisocyanate (TDI); as well as aliphatic diisocyanates such as ethylene diisocyanate (EDI), 1 ,4-butane diisocyanate (BDI), 1 ,6-hexamethylene diisocyanate (HDI), decane-1 , 10-diisocyanate, 1 ,12-dodecane diisocyanate (DDI), lysine diisocyanate (LDI); and cyclo aliphatic diisocyanates like isophorone diisocyanate (IPDI), 1 ,4-cyclohexyl diisocyanate (CHDI), and dicyclohexylmethane-4,4'-diisocyanate (H12MDI). Isomers of these diisocyanates may also be useful. Mixtures of two or more polyisocyanates may be used.The thermoplastic polyurethanes are also made using a polyol component. Polyols, which may also be described as hydroxyl terminated intermediates, useful in the present invention include polyester polyols, polyether polyols, polycarbonate polyols and combinations thereof. The polyester polyols preferably are linear polyesters. Hydroxyl terminated polymeric intermediates having a number average molecular weight (Mn) of preferably from about 300 to about 10,000, for example, about 400 to about 8,000 Daltons, further for example about 500 to about 6,000 Daltons. The molecular weight is determined by assay of the terminal functional groups and is related to the number average molecular weight. Unless otherwise noted, the molecular weight can be determined via end group quantification or can be calculated from the OH number according to EN ISO 4629-1 :2016 in the context of the present invention. Suitable polyols are in principle known to the person skilled in the art.Suitable polyurethanes described herein are made using optionally a chain extender component. Suitable chain extenders include low molecular weight diols (molecular weight less than 500 g / mol), diamines, and combinationthereof. Suitable chain extenders include relatively small polyhydroxy compounds, for example lower aliphatic or short chain glycols having from 2 to 20, or 2 to 12, or 2 to 10 carbon atoms. Suitable examples include ethylene glycol (EDO), diethylene glycol (DEG), propylene glycol (PDO), dipropylene glycol (DPG), 1 ,4-butanediol (BDO), 2-me- thyl-1 ,3-propanediol (MPO), 1 ,6-hexanediol (HDO), 1 ,3-butanediol (1,3-BDO), 1 ,5-pentanediol (1,5-PDO), neopentyl glycol (NPG), 1,4-cyclohexanedimethanol (CHDM), 2,2-bis[4-(2-hydroxyethoxy)phenylpropane (HEPP), hexamethylenediol (HDO), heptanediol, nonanediol (NDO), dodecanediol (DDO), 3-methyl-1 ,5-pentanediol (MPD), hydroquinone bis(2-hydroxyethyl) ether (HQEE), ethylenediamine (EDA), butanediamine (BDA), hexamethylenediamine (HDA), and hydroxyethyl resorcinol (HER), and the like, as well as mixtures thereof. In some embodiments the chain extender includes BDO, HDO, 3-methyl-1 ,5-pentanediol, or a combination there-of. In some embodiments, the chain extender includes BDO. Other glycols, such as aromatic glycols could be used. In some embodiments, the composition is formed using less than 40% by weight, for example only less than 30% by weight, preferably less than 25%, for example, less than 15%, further for example, less than 12%, in particular less than 8% by weight of the total reactants of a chain extender. In some embodiments, the thermoplastic polyurethanes are essentially free of or even completely free of chain extender.The thermoplastic polyurethanes used according to the present invention typically have a hard segment content less than 50 wt%, preferred less than 40 wt%. Optionally, one or more polymerization catalysts may be present during the polymerization reaction. Generally, any conventional catalyst can be utilized to react the diisocyanate with the polyol intermediates or the chain ex-tender. Examples of suitable catalysts which in particular accelerate the reaction between the NCO groups of the diisocyanates and the hydroxy groups of the polyols and chain extenders are the conventional tertiary amines known from the prior art, e.g. triethylamine, dimethylcyclohexyl-amine, N-methylmorpholine, N, N'-dimethylpiperazine, 2-(dimethylaminoethoxy)ethanol, diazabicyclo[2.2.2]octane and the like, and also in particular organometallic compounds, such as titanic esters, iron compounds, e.g. ferric acetylacetonate, tin compounds, e.g. stannous diacetate, stannous octoate, stannous dilaurate, bismuth compounds, e.g. bismuth trineodecanoate, or the dialkyltin salts of aliphatic carboxylic acids, e.g. dibutyltin diacetate, dibutyltin dilaurate, or the like. The amounts usually used of the catalysts are from 0.001 to 0.1 part by weight per 100 parts by weight of polyol component. In some embodiments, the reaction to form the thermoplastic PU used according to the present invention is substantially free of or completely free of catalyst.According to a further embodiment, the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C and with a glass transition temperature of less than 20 °C and either no melting point above 20 °C or a melting point above 20 °C with an enthalpy ef fusion lower than 10 J / g. Suitable polymer compositions are also known as pressure sensitive adhesives and are for example disclosed in WO2022 / 179912. If the polymer composition has a softening temperature in the range of from -15 °C to less than 40 °C, the glass transition temperature is determined by Differential Scanning Calorimetry according to ASTM D 3418- 08 ("midpoint temperature” of second heating curve, heating rate 20 K / min).According to the present invention, the adhesive layer (LA) can include a variety of polymers commonly used in adhesives, as sealants or also cast elastomers. For example, the layer can include at least one polymer selected from a polyurethane, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, a polyester, a polyether, a copolymer thereof, and any combination thereof. In some aspects, the polystyrene is or includes a polystyrene block copolymer. Suitable polystyrenes can include poly(styrene-isoprene-styrene), poly(styrene-butadiene-sty- rene), poly(styrene-ethylene-butene-styrene), and a poly(styrene-ethylene-propene). Furthermore, epoxy resins, or silicon based adhesives may be used.In some aspects, the adhesive layer (LA) includes at least one thermoplastic polymer selected from a thermoplastic polyurethane, a thermoplastic polyamide, a thermoplastic polyolefin, a thermoplastic polyester, a thermoplastic polyether, a thermoplastic copolymer thereof, and any combination thereof. In some aspects, the composition includes a polyolefin such as a polyethylene, a polypropylene, a copolymer thereof, or any combination thereof. The polyolefin can be an ethylene copolymer. In some aspects, the composition includes a thermoplastic polyolefin. The thermoplastic polyolefin, in some aspects, includes a thermo-plastic polyethylene, a thermoplastic polypropylene, a thermoplastic copolymer thereof, or any combination thereof. The thermoplastic polyolefin can include a thermoplastic ethylene copolymer. In some aspects, the thermoplastic ethylene copolymer is ethylene vinyl acetate (EVA).According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon-based adhesives and polyvinyl acetates. The adhesive may be a foamed or compact material in the context of the present invention. The adhesive layer (LA) can be solvent-free, solvent based or aqueous based (dispersion or suspension) and can be applied by different application technologies.According to a preferred embodiment, the layer (LL) comprises a thermoplastic polyurethane and the adhesive layer (LA) comprise a polyurethane.The adhesive layer (LA) may be prepared from suitable compositions which are in principle known to the person skilled in the art. Suitable are one component compositions but also multi-components compositions, in particular two component compositions. According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the adhesive layer (LA) is prepared from a one or multi component adhesive or sealant, preferably a polyurethane based adhesive.Layer (LA) may be a compact layer or a foam layer. The thickness of the layer may vary in broad ranges.Various additives may be present in the layer (LL) and / or the adhesive layer (LA) such as for example antioxidants, such as phenolic types, rheology modifiers, such as hydrophobic or hydrophilic fumed silica, and adhesion promoters, such as malonic acid, fumaric acid, chlorinated rubber, vinyl chloride / vinyl acetate copolymers, vinyl chloride / vi- nyl acetate / maleic acid terpolymers. Other additives may be used to enhance the performance of the composition orblend, such as other resins, including but not limited to coumarone-indene or terpene-phenolic which may help increase the tackiness of the adhesive when hot and slow the recrystallization time. All of the additives described above may be used in an effective amount customary for these substances. According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1).Additives and fillers may for example be used to influence the conductivity of the layers, in particular layer (LL). The layer (LL) can be electrically conductive or insulating. Preferably, the layer (LL) has a high insulating resistance (low electrical conductivity).Suitable additives (A1) may for example be additives to improve the thermal conductivity of the layer (LL) and / or the adhesive layer (LA). Suitable additives may for example be surface modified aluminum tri-hydroxides, preferably is an alkyl-silane treated aluminium trihydroxide (ATH). Such surface modified aluminum tri-hydroxides are in principle known and for example disclosed in WO9932554.Preferably ATH is a coarse ATH. The size distribution of the surface modified ATH may be monomodal, bimodal or multimodal. In a preferred embodiment the size distribution of the ATH is bimodal or trimodal to allow a dense packing of the filler in the binder matrix. Preferably the surface modified ATH has a particle size D90 of preferably 50 to 200 m, more preferable 60 to 150 pm and especially preferred 80 to 120 pm. In an especially preferred embodiment the surface modified ATH has at least a bimodal size distribution of 30 to 70 wt.-% of a surface modified ATH having a size of 1-20 pm and 30 to 70 wt.-% of a surface modified ATH having a D90 size of 40 to 200 pm, each based on the total weight of the surface modified ATH.In a preferred embodiment the cured thermally conductive resin according to the present invention has a thermal conductivity of at least 0.8 W / mK, preferably 1.0 to 3.0 W / mK, determined according to ISO 22007-2 at 25 °C.In a preferred embodiment the composition of the cured thermally conductive resin (LA) and the layer (LL) according to the present invention has a thermal conductivity of at least 0.6 W / mK, preferably 1 .0 to 3.0 W / mK, determined according to ISO 22007-2 at 25 °C.According to the present invention, the composite comprises a layer (LL) and an adhesive layer (LA) and preferably comprises a first part (P1) which is at least partially in contact with the layer (LL) and a second part (P2) which is at least partially in contact with the adhesive layer (LA). The first part and the second part are thus connected via the layer (LL) and the adhesive layer (LA).According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA).Preferably, at least two parts are bonded but the composite may comprise further parts. The parts may comprise different materials and may also vary in shape and size. According to the present invention, it is also possible that the at least two parts comprise the same material. At least two parts are bonded to form an article. According to the present invention, the article may also comprise further parts or components.The first part or component of the bonded article may comprise a polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals, for example a crepe rubber, a natural leather, a synthetic leather, a polyurethane (for example a polyurethane foam and / or a thermoplastic polyurethane TPU), a thermoplastic rubber, a styrene butadiene rubber, a polyvinyl acetate, a polyamide (PA), a polyvinyl chloride, a polystyrene, an acrylonitrile butadiene styrene, a polyethylene terephthalate (PET), a polybutylene terephthalate, a textile, a fabric, a thermo-plastic polyurethane knit fiber and a combination thereof. According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the first part (P1) comprises a polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.The second part or component may comprise the same or a different material. According to a further embodiment, the present invention also relates to the composite as disclosed above, wherein the second part (P2) comprises a polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.According to the present invention, the composite may comprise a first part which is at least partially connected to layer (LL) and the adhesive layer (LA). Layer (LA) may be connected to the second part but it is also possible that layer (LA) and the second part care connected via a second layer (LL).According to a further aspect, the present invention also relates to a process for preparing a composite comprising a layer (LL) and an adhesive layer (LA), the process comprising(1) providing the layer (LL);(2) at last partially joining the layer (LL) with the adhesive layer (LA); wherein the layer (LL) comprises a thermoplastic polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C.The layer (LL) may be provided as a film or according to step (1), the layer may be applied to a surface, in particular a surface of the first part (P1 ). According to the present invention, it is also possible to apply a composition to a surface which is suitable to form a layer (LL). Suitable compositions may for example comprise the thermoplastic polymer composition and a solvent or further customary additives.According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the layer (LL) is applied to a first part (P1 ) prior to step (1).Suitable methods for the application of layer (LL) or a composition suitable to form layer (LL) include for example extrusion, coating, spray, gravure printing, dot coating, pattern printing and injection molding etc to form include but not limited to a film, web, mesh, dot, pattern and article etc for further heat press lamination or direct hot melt coatings on laminate substrates by include but not limited to T-die extrusion, coating, spray, gravure printing, dot coating and pattern printing etc, followed by a pressing with or without heating, and cooling steps. The layer (LL) can be applied for example using an automated or machine assisted process, e.g. using an automatic sprayer.Layer (LL) may also be applied in the form of an aqueous dispersion. The application of aqueous polyurethane dispersion adhesive preferably occurs by brushing, spray, doctor blade coating, print or roll coating, followed by a drying step. The amount of aqueous polyurethane dispersion adhesive is preferably from 10 g / m2to 450 g / m2(solid), more preferred from 20 to 250 g / m2, particularly preferred from 50 to 200 g / m2.According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the layer (LL) is applied as a dispersion, preferably by spraying, doctor blading, deep coating or brushing.According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the layer (LL) is applied as an aqueous polyurethane dispersion, preferably by spraying, doctor blading, deep coating or brushing.Suitable polyurethane adhesives preferably have a K value (measured as 1 wt.% solution in DMF at 25°C) of not more than 100, preferably from 40 to 90, more preferably from 45 to 90, measured as 1 wt.% solution in DMF at 25 °C.The K value is a relative viscosity number, which is determined in analogy to DIN EN ISO 1628-1 2021 at 25 °C. It comprises the flow rate of a 1 weight% strength solution of the polyurethane in DMF, relative to the flow rate of pure DMF, and characterizes the average molecular weight of the polyurethane.The thermoplastic polymer preferably has a hardness that can be measured by a conventional Durometer method (conditions given in the experimental part). Preferably the hardness is from 50 shore A to 90 shore D, more preferably on the shore D scale between 20 shore D and 90 shore D.According to the present invention, the layer (LL) is applied in an amount and a way that allows bonding of the parts to form an article. The application amount of the layer (LL) is preferably in the range from 10 g / m2 to 700 g / m2, preferred from 20 to 600 g / m2, more preferred from 50 to 500 g / m2, particularly preferred from 100 to 450 g / m2.According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the layer (LL) is applied as a film.According to step (2), the layer (LL) is at least partially joined with the adhesive layer (LA). The adhesive layer (LA) may be applied to the layer (LL) or it is also possible according to the present invention that the adhesive layer (LA) is applied to a surface, for example the surface of part (P2) before step (2) of the process. According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the adhesive layer (LA) is at least partially connected to a second part (P2).The process of the present invention may also comprise further steps, such as for example treatment steps of a surface. Surface treatment may for example include a surface treatment such as a physical treatment, a chemical treatment, a solvent treatment, or any combination thereof. Physical treatments can include treating a surface with an abrasive to increase a surface roughness. Chemical treatments can include etching a surface with acid. Solvent treatments can include contacting a surface with a solvent to remove contaminants from the surface. Preferably, the treating step does not include a primer treatment (i.e. coating with a primer solution before application of the adhesive).According to a further aspect, the present invention is also directed to a composite obtained or obtainable according to the process as disclosed above. Preferably, the invention is directed to a composite as disclosed above, wherein the layer (LL) is at least partially connected to a surface, preferably to a surface of a first part (P1), and the peeling strength for debonding between layer (LL) and the surface is greater than 40 mN / m2, determined according to ASTM D3330.The composite comprises the layer (LL) and the adhesive layer (LA) and preferably comprises at least two parts or components which are bonded to one another. Parts of the bonded articles are for example an extruded part, an injection molded part, a pressed part, a foamed part, a cable sheath, a hose, a profiled element, a drive belt, a fiber material, a nonwoven, a film, a molded part, a sole, a sporting good, an part of footwear, a plug, a housing, or a damping element for the electrical industry, for the automobile industry, for machine construction, for 3D printing, for medicine, or for consumer goods, batteries, articles for e-mobility. Preferred bonded articles are articles for the automobile industry, for machine construction, for consumer goods, batteries, or articles for e-mobility.It has been found that the articles according to the present invention can be disassembled using suitable mild conditions which makes them easier to recycle. According to the present invention, it is possible to disassemble the article and obtain the individual components allowing to separate these components and recycle them. This way, mixing of different components can be reduced or avoided. Furthermore, the individual components obtained may also be reused.According to a further embodiment, the present invention also relates to the process as disclosed above, wherein the composite is separated into its parts by applying debonding conditions (CD), preferably wherein the debonding conditions (CD) comprise heat, treatment with solvents or both. According to the present invention, it is also possible to combine heat, treatment with solvents or both with a mechanical treatment.Suitable debonding conditions may include a debonding temperature and debonding pressure. The debonding can be conducted by treating the article at elevated temperature, for example in an oven or with a solution and depending on the flow beginning temperature of a given material at a temperature in the range of from 75 °C below the flow beginning temperature of the thermoplastic polymer to 50 °C above the flow beginning temperature of the thermoplastic polymer, preferably in a range from 65 °C below the flow beginning temperature of the thermoplastic polymer to 40 °C above the flow beginning temperature of the thermoplastic polymer, preferably in a range from 50 °C below the flow beginning temperature of the thermoplastic polymer to 30 °C above the flow beginning temperature of the thermoplastic polymer, preferably in a range from 40 °C below the flow beginning temperature of the thermoplastic polymer to 20 °C above the flow beginning temperature of the thermoplastic polymer. The debonding can be conducted by treating the article at elevated temperature for a time period of 1 second to 30 minutes, preferentially 15 seconds to 15 minutes, or also at a temperature in the range of from 20 °C below the flow beginning temperature of the thermoplastic polymer to 35 °C above the flow beginning temperature of the thermoplastic polymer for a time period of 1 second to 30 minutes, preferentially 15 seconds to 15 minutes.Typically, debonding could be carried out at a temperature in the range from 50 °C to 160 °C, preferably in a range of from 60 °C to 140 °C, more preferable in a range of from 60 °C to 120 °C. Typically debonding is carried out in air, in water environment, steam environment, or dry environment. According to the present invention, debonding may be carried out at a temperature in the range from 50 °C to 160 °C, in air, in water environment, steam environment, or dry environment.According to a further embodiment, the present invention is also directed to a process as dis-closed above, wherein the article is separated into its parts by using heat. The heat can be sup-plied via heating in an oven, treatment with heated air, treatment with heated water, heated aqueous solutions including further additives such as for example surfactants, or steam or can be generated using radiation such as for example microwave and / or radiofrequency radiation according to the present invention. According to the present invention, also combinations of these methods can be used.According to a further aspect, the present invention is also directed to a process preferably a process as disclosed above, comprising the step: converting the composite and / or the composite obtainable by or obtained by the process as disclosed above or a chemical material obtainable by or obtained by the process as disclosed above to obtain a product.According to a further embodiment, the present invention is also directed to a process as disclosed above, wherein the product is selected from:I) building block or monomer; or ii) polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or ill) cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or iv) agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or v) active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or vi) aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or vii) cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or viii) polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.According to a further embodiment, the present invention is also directed to a process as disclosed above, wherein the content of the polymeric material (PM) in the polymer product is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of the polymeric material (PM) in the polymer product is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.The publication Prior Art Disclosure; Issue 684; paragraphs

[1000] to

[8005] ; ISSN: 2198-4786; published: February 12, 2024 will be regarded as Reference RF1 , which is incorporated herein by reference in its entirety. Preferably, the product is a product as described in Reference RF1 ; paragraphs

[1000] to

[8005] , Preferably, the process described herein is further a process for the production of a product.The converting step to obtain the product preferably comprises one or more step(s) as described below and can be performed by conventional methods well known to a person skilled in the art. The converting step preferably comprises one or more step(s) selected from: recycling, preferably depolymerizing, gasifying, pyrolyzing, and / or steam cracking; and / or purifying, preferably crystallizing, (solvent) extracting, distilling, evaporating, hydrotreating, absorbing, adsorbing and / or subjecting to ion exchanger; and / or assembling, preferably foaming, synthesizing, chemical conversion, chemically transforming, polymerizing and / or compounding; and / or forming, preferably foaming, extruding and / or molding; and / or finishing, preferably coating and / or smoothing.In addition, the one or more step(s) are described in detail in Reference RF1 ; paragraphs

[1000] to

[8005] ,The term "building block”, as used herein, comprises compounds, which are in a gaseous or liquid state under standard conditions of 0 °C and 0.1 MPa. Building blocks are typically used in chemical industry to form secondary products, which provide a higher structural complexity and / or higher molecular weight than the building block on which the secondary product is based. The building block is preferably selected from the group consisting of hydrogen, carbon monoxide, carbon dioxide, ethylene oxide, ethylene glycols, syngas comprising a mixture of hydrogen and carbon monoxide, alkanes, alkenes, alkynes and aromatic compounds. The alkanes, alkenes, alkynes and aromatic compounds comprise in particular 1 to 12 carbon atoms, respectively.The term "monomer”, as used herein, comprises molecules, which can react with each other to form polymer chains by polymerization. The monomer is preferably selected from the group consisting of (meth)acrylic acid, salts of (meth)acrylic acid; in particular sodium, potassium and zinc salts; (meth)acrolein and (meth)acrylates. (Meth)acry- lates comprising 1 to 22 carbon atoms are preferred, in particular comprising 1 to 8 carbon atoms. The terms (meth)acrylic acid, (meth)acrolein or (meth)acrylate relate to acrylic acid, acrolein or acrylate and also to methacrylic acid, methacrolein or methacrylate, where applicable. Further, the monomer can be selected from hexamethylenediamine (HMD) and adipic acid.The building block can further be an intermediate compound. The term "intermediate compound”, as used herein, comprises organic reagents, which are applied for formation of compounds with higher molecular complexity. The intermediate compound can be selected for example from the group consisting of phosgene, polyisocyanates and propylene oxide. The polyisocyanates are in particular aromatic di- and polyisocyanates, preferably toluene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI).The building block and the monomer and typical converting step(s) to obtain the building block or monomer are described in more detail in paragraphs

[1000] to

[1012] of Reference RF1.The term "polymer A”, as used herein, comprises thermoplastic, e.g., polyamide or thermoplastic polyurethane, thermoset, e.g., polyurethane, elastomer, e.g., polybutadiene, or a copolymer or a mixture thereof and is defined in more detail in paragraphs

[2001] to

[2007] of Reference RF1.The term "polymer composition A”, as used herein, comprises all compositions comprising a polymer as described above and one or more additive(s), e.g. reinforcement, colorant, modifier and / or flame retardant, and is defined in more detail in paragraph

[2008] of Reference RF1.The term "polymer product A”, as used herein, comprises any product comprising the polymer A and / or polymer composition A as described above and is defined in more detail in paragraphs

[2009] and

[2010] of Reference RF1. The step(s) to obtain the polymer, preferably polymer A, polymer composition, preferably polymer composition A or polymer product, preferably polymer product A is / are described in more detail in paragraph

[2011] of Reference RF1 .The term "industrial use polymer”, as used herein, comprises rheology, polycarboxylate, alkoxylated polyalkylenamine, alkoxylated polyalkylenimine, polyether-based, dye inhibition and soil release cleaning polymers defined in more detail in paragraphs

[3035] to

[3044] of Reference RF1. The term "industrial use surfactant”, as used herein, comprises non-ionic, anionic and amphoteric industrial use surfactants defined in more detail in paragraphs

[3008] to

[3034] of Reference RF1. The term "industrial use descaling compound”, as used herein, comprises non-phosphate based builders (NPB) and phosphonates (CoP) described in more detail in paragraphs

[3001] to

[3005] of Reference RF1. The term "industrial use biocide”, as used herein, refers to a chemical compound that kills microorganisms or inhibits their growth or reproduction defined in more detail in paragraphs

[3006] to

[3007] of Reference RF1. The term "industrial use solvent”, as used herein, comprises alkyl amides, alkyl lactamides, alkyl esters, lactate esters, alkyl diester, cyclic alkyl diester, cyclic carbonates, aromatic aldehydes and aromatic esters defined in more detail in paragraphs

[3045] to

[3055] of Reference RF1. The term "industrial use dispersant”, as used herein, comprises anionic and non-ionic industrial use dispersants defined in more detail in paragraphs

[3056] to

[3058] of Reference RF1. The term "composition and / or formulation thereof' with reference to the industrial use polymers, industrial use surfactants, descaling compounds and / or industrial use biocides refers to industrial use compositions and / or institutional use products and / or fabric and home care products and / or personal care products defined in more detail in paragraph

[3059] of Reference RF1. The converting step(s) to obtain the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3060] of Reference RF1 . The converting steps to obtain the industrial use composition or formulation of the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3061] of Reference RF1.The term "agrochemical composition”, as used herein, typically relates to a composition comprising an agrochemi- cally active ingredient and at least one agrochemical formulation auxiliary. Examples of agrochemical compositions, active ingredients and auxiliaries are described in more detail in Reference RF1 , paragraph

[4001] ,The agrochemical composition may take the form of any customary formulation. The agrochemical compositions are prepared in a known manner, e.g. described by Mollet and Grubemann, Formulation technology, Wiley VCH, Weinheim, 2001 ; or Knowles, New developments in crop protection product formulation, Agrow Reports DS243, T&F Informa, London, 2005. The converting step(s) to obtain the agrochemically active ingredients and auxiliaries may be conducted in analogy to the production step(s) of their analogues that are based on petrochemicals or other precursors that are not gained by recycling processes. In addition, conversion to compounds mentioned in sections "Polymer” and "Cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or compositions or formulations thereof” may be performed as described in these sections as well as the respective paragraphs in Reference RF1.The term active pharmaceutical ingredients and / or intermediates thereof, as used herein, comprises substances that provide pharmacological activity or other direct effect in the diagnosis, cure, mitigation, treatment, or prevention of disease, or to affect the structure or any function of the body. Intermediates thereof are isolated products that are generated during a multi-step route of synthesis of an active pharmaceutical ingredient. The term pharmaceutical excipients, as used herein, comprises compounds or compound mixtures used in compositions for various pharmaceutical applications, which are not substantially pharmaceutically active on itself. Active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients are defined in more detail in paragraph

[5001] of Reference RF1.The converting step(s) to obtain the active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms animal feed additives, human food additives, dietary supplements, as used herein, comprises Vitamins, Pro-Vitamins and active metabolites thereof including intermediates and precursors, especially Vitamin A, B, E, D, K and esters thereof, like acetate, propionate, palmitate esters or alcohols thereof like retinol or salts thereof and any combinations thereof; Tetraterpenes, especially isoprenoids like carotenoids and xanthophylls including their intermediates and precursors as well as mixtures and derivates thereof, especially beta carotene, Canthaxanthin, Citranax- anthin, Astaxanthin, Zeaxanthin, Lutein, Lycopene, Apo-carotenoids, and any combinations thereof; organic acids, especially formic acid, propionic acid and salts thereof, such as sodium, calcium or ammonium salts, and any combinations thereof, such as but not limited to mixtures of formic acid and sodium formiate, propionic acid and ammonium propionate, formic acid and propionic acid, formic acid and sodium formiate and propionic acid, propionic acid and sodium propionate and formic acid and sodium formiate; glycerides of carboxylic acids and short and medium chain fatty acids, conjugated linoleic acids, such as omega-6 fatty acid (C18:2) methyl ester and 1 ,2-propandiol and beverage stabilizers, such as polyvinylpyrrolidone-polymer or polyvinylimidazole / polyvinylpyrrolidone-copolymer. Animal feed additives, human food additives and dietary supplements are defined in more detail in paragraph

[5002] of Reference RF1.The converting step(s) to obtain the animal feed additives, human food additives, dietary supplements may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms aroma chemical and aroma composition as used herein, comprise a volatile organic substance with a molecular weight between 70-250 g / mol comprising a functional group with a carbon skeleton of C5-C16 carbon atoms comprising linear, branched, cyclic, for example with a ring size of C5-C18, bicyclic or tricyclic aliphatic chains and but not necessarily one or more unsaturated structural elements like double bonds, triple bonds, aromatics or heteroaromatics and preferably the one or more additional functional groups are selected from alcohol, ether, ester, ketone, aldehyde, acetal, carboxylic acid, nitrile, thiol, amine. In one aspect, the aroma chemical is a terpene-based aroma chemical, for example selected from monoterpenes and monoterpenoids, sesquiterpenes and sesquiterpe- noids, diterpenes, triterpenes or tetraterpenes. Aroma chemicals can be combined with further aroma chemicals to give an aroma composition. Aroma chemicals and aroma compositions are defined in more detail in paragraph

[5003] of Reference RF1 .The converting step(s) to obtain the aroma chemical and aroma composition may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The term "aqueous polymer dispersion”, as used herein, comprises aqueous composition(s) comprising dispersed polymer(s) and is defined in more detail in the section

[6001] entitled "aqueous polymer dispersion” of Reference RF1. The dispersed polymer(s) may be selected from acrylic emulsion polymer(s), styrene acrylic emulsion poly- mer(s), styrene butadiene dispersion(s), aqueous dispersion(s) comprising composite particles, acrylate alkyd hybrid dispersion(s), polyurethane(s) (including UV-curable polyurethanes) and polyurethane - poly(meth)acrylate hybrid polymer(s). The term "emulsion polymer”, as used herein, comprises polymer(s) made by free-radical emulsion polymerization. Aqueous polyurethane dispersion(s) are defined in more detail in the section

[6002] entitled "Polyurethane dispersions” of Reference RF1. UV-curable polyurethane(s) is / are defined in more detail in the section

[6017] of Reference RF1. Polyurethane - poly(meth)acrylate hybrid polymer(s) is / are defined in more detail in the section

[6016] of Reference RF1 .The term "polymeric dispersant”, as used herein, comprises preferably polymer(s) comprising polyether side chain, in particular polycarboxylate ether polymer(s) and polycondensation product(s) defined in more detail in paragraph

[6020] entitled "Polymeric dispersant” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polymer dispersion(s) comprising emulsion polymer(s) is / are defined in more detail in the section

[6003] entitled "Emulsion polymerization” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polyurethane dispersion(s) is / are defined in more detail in the section

[6014] entitled "Process for the preparation of aqueous polyurethane dispersions” and section [6017)] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” of Reference RF1 .Composition(s) and uses of aqueous polymer dispersion(s) and of polymeric dispersant(s) are defined in more detail in the following sections of Reference RF1 : section

[6004] entitled "Uses of aqueous polymer dispersions”, section

[6005] entitled "Binders for architectural and construction coatings” section

[6006] entitled "Binders for paper coating” section

[6007] entitled "Binders for fiber bonding” section

[6008] entitled "Adhesive polymers and adhesive compositions” section

[6015] entitled "Aqueous polyurethane dispersions suitable for use in coating compositions” section

[6016] entitled "Aqueous polyurethane - poly(meth)acrylate hybride polymer dispersions suitable for use in coating compositions” section

[6017] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” section

[6018] entitled "Inorganic binder compositions comprising polymeric dispersants and their use”

[6019] 100% curable coating compositionsUV-crosslinkable poly(meth)acrylate(s) and its / their uses are defined in more detail in section

[6009] entitled "UV- crosslinkable poly(meth)acrylates for use in UV-curable solvent-free hotmelt adhesives and their use for making pressure-sensitive self-adhesive articles” of Reference RF1.Polyisocyanate(s), composition(s) comprising them and their uses are defined in more detail in section

[6010] entitled "Polyisocyanates” of Reference RF1.Hyperbranched polyester polyol(s) and its / their uses are defined in more detail in section

[6011] entitled "Organic solvent based hyperbranched polyester polyols suitable for use in coating compositions” of Reference RF1. The converting step(s) to obtain the hyperbranched polyester polyols is / are defined in more detail in the section

[6012] entitled "Preparation of organic solvent based hyperbranched polyester polyols” of Reference RF1 . Coating compositions) comprising hyperbranched polyester polyol(s), polyisocyanate(s) and additive(s) and substrate(s) coated therewith are defined in more detail in section

[6013] entitled "Organic solvent based two component coating compositions comprising hyperbranched polyester polyols and polyisocyanates” of Reference RF1.Unsaturated polyester polyol(s), solvent-based coating composition(s) comprising said unsaturated polyester pol- yol(s) and substrate(s) for coating with said coating composition(s) are defined in more detail in section

[6018] entitled "Organic solvent based coating composition comprising unsaturated polyester polyols” of Reference RF1. 100% curable coating composition(s) is / are defined in more detail in section

[6019] of Reference RF1.Polymeric dispersant(s) for inorganic binder compositions is / are defined in more detail in section

[6020] of Reference RF1. The inorganic binder composition(s) comprising the polymeric dispersants and their use are defined in more detail in section

[6021] of Reference RF1. The converting step(s) to obtain the polymeric dispersant(s) are defined in more detail in section

[6020] of Reference RF1. The term "inorganic binder composition” comprising the polymericdispersant(s), as used herein, comprises preferably in particular hydraulically setting compositions and compositions comprising calcium sulfate and is defined in more detail in section

[6021] of Reference RF1 entitled "Inorganic binder compositions comprising the polymeric dispersant and their use”. Specific building material formulation(s) comprising polymeric dispersant(s) or building product(s) produced by a building material formulation comprising a polymeric dispersant are disclosed in more detail in section

[6021] of Reference RF1.The term "cosmetic surfactant”, as used herein, comprises non-ionic, anionic, cationic and amphoteric surfactants and is defined in more detail in paragraph

[7002] of Reference RF1. The term "emollient”, as used herein, refers to a chemical compound used for protecting, moisturizing, and / or lubricating the skin and is defined in more detail in paragraph

[7003] of Reference RF1. The term "wax”, as used herein, comprises pearlizers and opacifiers and is defined in more detail in paragraph

[7004] of Reference RF1. The term "cosmetic polymer”, as used herein, comprises any polymer that can be used as an ingredient in a cosmetic formulation and is defined in more detail in paragraph

[7005] of Reference RF1. The term "UV filter”, as used herein, refers to a chemical compound that blocks or absorbs ultraviolet light and is defined in more detail in paragraph

[7006] of Reference RF1 . The term "further cosmetic ingredient”, as used herein, comprises any ingredient suitable for making a cosmetic formulation. Several sources disclose cosmetically acceptable ingredients. E. g. the database Cosing on the internet pages of the European Commission discloses cosmetic ingredients and the International Cosmetic Ingredient Dictionary and Handbook, edited by the Personal Care Products Council (PCPC), discloses cosmetic ingredients. The term "composition and / or formulation thereof' with reference to the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter and / or further cosmetic ingredient refers to personal care and / or cosmetic compositions or formulations defined in more detail in paragraph

[7007] of Reference RF1. The converting step(s) to obtain the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter or further cosmetic ingredient is / are defined in more detail in paragraph

[7008] of Reference RF1 .The terms "polymer B”, "polymer composition B”, "coating composition”, "other functional composition”, "foil”, "molded body”, "coating” and "coated substrate” are well known to the person skilled in the art and are defined in more detail from paragraph

[8000] to

[8005] of Reference RF1.Further embodiments of the present invention can be found in the claims and the examples. It will be appreciated that the features of the subject matter / processes / uses according to the invention that are mentioned above and elucidated below are usable not only in the combination specified in each case but also in other combinations without departing from the scope of the invention. For example, the combination of a preferred feature with a particularly preferred feature or of a feature not characterized further with a particularly preferred feature etc. is thus also encompassed implicitly even if this combination is not mentioned explicitly.Illustrative embodiments of the present invention are listed below, but these do not restrict the present invention. In particular, the present invention also encompasses those embodiments which result from the dependency references and hence combinations specified hereinafter.1 . Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C.2. The composite according to embodiment 1 , wherein the polymer composition comprises a thermoplastic polymer with a softening temperature in the range of from 40 °C to 200 °C.3. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the polymer composition comprises a thermoplastic polymer with a softening temperature in the range of from 40 °C to 200 °C.4. The composite according to embodiment 2 or 3, wherein the thermoplastic polymer has a flow beginning temperature (Tfb) measured according to QK4-73004 in the range of from 50 °C to 170 °C.5. The composite according to embodiment 1 , wherein the polymer composition comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C and with a glass transition temperature of less than 20 °C and either no melting point above 20 °C or a melting point above 20 °C with an enthalpy ef fusion lower than 10 J / g.6. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the polymer composition comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C and with a glass transition temperature of less than 20 °C and either no melting point above 20 °C or a melting point above 20 °C with an enthalpy of fusion lower than 10 J / g.7. The composite according to any one of embodiments 1 to 6, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA).8. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA).9. The composite according to any one of embodiments 1 to 8, wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.10. The composite according to any one of embodiments 1 to 9, wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.11 . Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA), wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals and wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.12. The composite according to any one of embodiments 1 to 11, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, polyester, polycarbonate, polyethyleneterephthalate, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, polyvinylacetate, polyvinylpyrrolidone, rubber or a mixture thereof.13. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, polyester, polycarbonate, polyethyleneterephthalate, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, polyvinyl acetate, polyvinylpyrrolidone, rubber or a mixture thereof.14. The composite according to any one of embodiments 1 to 13, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon based adhesives and polyvinylacetates.15. The composite according to any one of embodiments 1 to 14, wherein the adhesive layer (LA) is prepared from a one or multi component adhesive or sealant, preferably a polyurethane based adhesive.Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C, wherein the adhesive layer (LA) is prepared from a one or multi component adhesive or sealant, preferably a polyurethane based adhesive. The composite according to any one of embodiments 1 to 16, wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1). Process for preparing a composite comprising a layer (LL) and an adhesive layer (LA), the process comprising(1) providing the layer (LL);(2) at last partially joining the layer (LL) with the adhesive layer (LA); wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C or 40 °C to 200 °C. The process according to embodiment 18, wherein the layer (LL) is applied to a first part (P1 ) prior to step (1). The process according to any one of embodiments 18 or 19, wherein the layer (LL) is applied as a film. The process according to any one of embodiments 18 to 20, wherein the layer (LL) is applied as a dispersion, preferably by spraying, doctor blading, deep coating or brushing. The process according to any one of embodiments 18 to 21, wherein the adhesive layer (LA) is at least partially connected to a second part (P2). The process according to embodiment 18, wherein the polymer composition comprises a thermoplastic polymer with a softening temperature in the range of from 40 °C to 200 °C. The process according to embodiment 23, wherein the thermoplastic polymer has a flow beginning temperature (Tfb) measured according to QK4-73004 in the range of from 50 °C to 170 °C. The process according to embodiment 18, wherein the polymer composition comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C and with a glass transition temperature of less than 20 °C and either no melting point above 20 °C or a melting point above 20 °C with an enthalpy ef fusion lower than 10 J / g.26. The process according to any one of embodiments 18 to 25, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA)27. The process according to any one of embodiments 18 to 26, wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.28. The process according to any one of embodiments 18 to 27, wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.29. The process according to any one of embodiments 18 to 28, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, polyester, polycarbonate, polyethyleneterephthalate, a polychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, polyvinyl acetate, polyvinylpyrrolidone, rubber or a mixture thereof.30. The process according to any one of embodiments 18 to 29, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon based adhesives and polyvinylacetates.31 . The process according to any one of embodiments 1 to 30, wherein the adhesive layer (LA) is prepared from a one or multi component adhesive or sealant, preferably a polyurethane based adhesive.32. The process according to any one of embodiments 18 to 31, wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1).33. A composite obtained or obtainable according to a process according to any one of embodiments 18 to 32.34. The composite according to embodiment 33, wherein the layer (LL) is at least partially connected to a surface, preferably to a surface of a first part (P1 ), and the peeling strength for debonding between layer (LL) and the surface is greater than 40 mN / m2, determined according to ASTM D3330.35. The process according to any one of embodiments 18 to 32, wherein the composite is separated into its parts by applying debonding conditions (CD), preferably wherein the debonding conditions (CD) comprise heat, treatment with solvents or both.36. Process, preferably according to any one of the embodiments 18 to 32, comprising the step:converting the composite obtainable by or obtained by the process according to any one of embodiments 18 to 32 or a chemical material obtainable by or obtained by the process according to any one of embodiments 18 to 32 to obtain a product.37. Process according to embodiment 36, wherein the product is selected from:I) building block or monomer; or ii) polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or ill) cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or iv) agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or v) active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or vi) aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or vii) cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or viii) polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate38. Process according to any one of embodiments 36 or 37, wherein the content of the polymeric material (PM) in the product is 1 weight-% or more, preferably 2 weight- % or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of the polymeric material (PM) in the polymer product is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and embodiment chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.39. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from 40 °C to 200 °C.40. The composite according to embodiment 39, wherein the layer (LL) comprises a thermoplastic polyurethane.41 . The composite according to any one of embodiments 39 or 40, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA).42. The composite according to any one of embodiments 39 to 41, wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.43. The composite according to any one of embodiments 39 to 42, wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.44. The composite according to any one of embodiments 39 to 43, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon based adhesives and polyvinylacetates.45. The composite according to any one of embodiments 39 to 44, wherein the adhesive layer (LA) is prepared from a polyurethane based adhesive.46. The composite according to any one of embodiments 39 to 45, wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1).47. Process for preparing a composite comprising a layer (LL) and an adhesive layer (LA), the process comprising(1) providing the layer (LL);(2) at last partially joining the layer (LL) with the adhesive layer (LA); wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from 40 °C to 200 °C.48. The process according to embodiment 47, wherein the layer (LL) is applied to a first part (P1) prior to step (1).49. The process according to any one of embodiments 47 or 48, wherein the layer (LL) is applied as a film.50. The process according to any one of embodiments 47 to 49, wherein the adhesive layer (LA) is at least partially connected to a second part (P2).51 . A composite obtained or obtainable according to a process according to any one of embodiments 47 to 49.52. The composite according to embodiment 50, wherein the layer (LL) is at least partially connected to a surface, preferably to a surface of a first part (P1 ), and the peeling strength for debonding between layer (LL) and the surface is greater than 40 mN / m2, determined according to ASTM D3330.53. The process according to any one of embodiments 47 to 49, wherein the composite is separated into its parts by applying debonding conditions (CD), preferably wherein the debonding conditions (CD) comprise heat, treatment with solvents or both.54. Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C.55. The composite according to embodiment 54, wherein the polymer composition comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C and with a glass transition temperature of less than 20 °C and either no melting point above 20 °C or a melting point above 20 °C with an enthalpy ef fusion lower than 10 J / g.56. The composite according to any one of embodiments 54 to 55, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA)57. The composite according to any one of embodiments 54 to 56, wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.58. The composite according to any one of embodiments 54 to 57, wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.59. The composite according to any one of embodiments 54 to 58, wherein the layer (LL) comprises at least one polymer selected from a thermoplastic polyurethane, polyester, polycarbonate, polyethyleneterephthalate, apolychloroprene, a latex, a polystyrene, a polyamide, a polyolefin, a polyacrylate, polyvinyl acetate, polyvinylpyrrolidone, rubber or a mixture thereof. The composite according to any one of embodiments 54 to 59, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon based adhesives and polyvinylacetates. The composite according to any one of embodiments 54 to 60, wherein the adhesive layer (LA) is prepared from a one or multi component adhesive or sealant, preferably a polyurethane based adhesive. The composite according to any one of embodiments 54 to 61 , wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1). Process for preparing a composite comprising a layer (LL) and an adhesive layer (LA), the process comprising(1) providing the layer (LL);(2) at last partially joining the layer (LL) with the adhesive layer (LA); wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from -15 °C to less than 40 °C. The process according to embodiment 63, wherein the layer (LL) is applied to a first part (P1 ) prior to step (1). The process according to any one of embodiments 63 or 64, wherein the layer (LL) is applied as a film. The process according to any one of embodiments 63 or 94, wherein the layer (LL) is applied as a dispersion, preferably by spraying, doctor blading, deep coating or brushing. The process according to any one of embodiments 63 to 66, wherein the adhesive layer (LA) is at least partially connected to a second part (P2). A composite obtained or obtainable according to a process according to any one of embodiments 63 to 67. The composite according to embodiment 68, wherein the layer (LL) is at least partially connected to a surface, preferably to a surface of a first part (P1), and the peeling strength for debonding between layer (LL) and the surface is greater than 40 mN / m2, determined according to ASTM D3330.70. The process according to any one of embodiments 63 to 67, wherein the composite is separated into its parts by applying debonding conditions (CD), preferably wherein the debonding conditions (CD) comprise heat, treatment with solvents or both.The invention is further described by examples. The examples relate to practical and in some cases preferred embodiments of the invention that do not limit the scope of the invention.Examples1 . Raw material for the Layer (LL)1.1 As layer LL following Hotmelt films were used:Hotmelt 1 was applied as a thin film of 150 pm thickness.Hotmelt 1 has the following composition:Polyurethane based hotmelt based onDiisocyanate: Hexamethylenediisocynate and 4,4-diisocyanato dicyclohexylmethanePolyol: PBA1000 (monomer: adipic acid, 1 ,4-butanediol, OHv: 112.2 mg KOH / g, Mn: 1 ,000 g / mol and Functionality of 2)Chain extender: 1 ,4-ButanediolHard Segment content: ~ 12,6 wt%DSC-Tm: not detectableTg: -38 °CTfb: 115 °C1 .2. Hotmelt 2 was applied as a thin film of 150pm thickness:Hotmelt 2 has the following composition:Polyurethane based hotmelt based onDiisocyanate: 4,4 -MDIPolyol: PBA3000 (monomer: adipic acid, 1 ,4-butanediol, OHv: 37.4 mg KOH / g, Mn: 3,000 g / mol and Functionality of 2)Chain extender: ButanediolHard Segment content: ~ 5.8%DSC-Tm: 47 °CTfb: 98 °C1 .3 Hotmelt 3 was applied as a thin film of 200 pm thickness:Hotmelt 3 has the following composition:Polyurethane based hotmelt based onDiisocyanate: 4,4 -MDIPolyol: PBA5000 (monomer: adipic acid, 1 ,4-butanediol, OHv: 22.4 mg KOH / g, Mn: 5,000 g / mol and Functionality of 2)Chain extender: ButanediolHard Segment content: ~ 0%DSC-Tm: 60 °CTfb: 60 °CThe hard segment content is calculated according to the following equation:HS: Hard SegmentITICE: mass of chain extender mjS0: mass of isocyanate rripoiyoi: mass of polyol2. Raw materials for thermally conductive adhesive as an example for LAPolyol 1 : polypropylene glycol obtained by propoxylation of propylene oxide having an OH-Number of 250 mgKOH / g.Polyol 2: Polyalkylene glycol obtained by alkoxylation of glycerine having an OH number of 170 mgKOH / g and a propylene oxide content of 80 to 90 % by weight based on the total weight of the alkylene oxideAdditive 1 : silane-based adhesion promoterFiller 1 : AEROSIL® R 202 is a fumed silica after-treated with polydimethylsiloxane from Evonik.TO filler 1 : alkyl-silane treated aluminium trihydroxide having a particle size D90 of about 100 mChain extender: 1 ,2-propylene glycolCross-linker: glycerine (97.7%)Drying agent 1 : alkali aluminosilicateDrying agent 2: water scavenger for isocyanates (Luna PTSI)Catalyst 1 : dioctyltin mercaptide catalystColor tint: tint for A componentIso 1 : allophanate modified hexamethylene diisocyanate, NCO content 20 wt.-%Iso 2: isocyanurate modified hexamethylene diisocyanate, NCO content 22 wt.-%3. Application of the adhesive layer (LA) according to the formulations as given in Table 1The composition composed of component A and the component B are shown in Table 1 . Polyol and isocyanate component were obtained as follows:Polyol components: in a speed blender cup all liquid components and on top of them the fillers are added (in total 500 g). These ingredients are then stirred with a speed mixer for 1 min at 800 rpm and another minute at 1600 rpm. Then the mixing is continued for 10 minutes under vacuum at 800 rpm.Isocyanate component: in a speed blender cup all liquid components and on top of them the fillers are added (in total 200 g). These ingredients are then stirred with a speed mixer for 1 min at 800 rpm and another minute at 1600 rpm. Then the mixing is continued for 10 minutes under vacuum at 800 rpm.Subsequently, the A and B components were transferred into a dual cartridge. This allows for easy mixing directly during application. With a volumetric 1 to 1 ratio, an index of 103 (disregarding any OH groups from fillers) is obtained. The index defines the equivalent ratio of NCO to OH groups. An index of 103 means that there are 103 isocyanate groups for every 100 OH groups. Both component A, component B, and the mixture exhibited good, low paste viscosity, enabling smooth dispensing from the cartridge.Table 1 : Composition of component A and the component B of the examples (Ex.) and comparative examples (Comp. Ex.).4. Characterization:4.1 Lap shear strength:4.1.1 Comparative example: For lap shear strength measurements of the thermally conductive resin, the samples are prepared by forming a layer of the adhesive between two 120 mm X 25 mm isopropanol cleaned alumi- num-specimen (AI6016) with 2 mm thickness, that overlap to form a bond area of about 14.5 mm X 25 mm. The adhesive layer is 1 .0 mm thick. The adhesive is applied, and the test samples were assembled at room temperature and cured for 5-7 d at room temperature. The measurement was performed at room temperature with a pulling speed of 10 mm / min and the resulting lab shear strength is recorded in MPa.4.1.2 Inventive example 1 : For lap shear strength measurements of the overall composite, one of two cleaned alu- minum-specimens (AI6016) with 2 mm thickness was coated with the 0.4 g Hotmelt 1 (LL) film of a thickness of 0.15 mm. The hotmelt amount in the overlap area was 0.1 g. The hotmelt 1 was applied to the surface with the help of a hot press. The press was heated at a temperature of 120 °C and the film was pressed to the metallic substrate for 90 seconds under a pressure of 35 kN at 120 °C the lamination of the film of the metallic surface and cooled afterward to allow re-solidification of the hotmelt 1 . The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.4.1.3 Inventive example 2: For lap shear strength measurements of the overall composite, both cleaned aluminum- specimens (AI6016) with 2 mm thickness were each coated with 0.4 g Hotmelt 1 (LL) film of a thickness of 0.15 mm. The hotmelt amount in the overlap area was 0.1 g. The press was heated at a temperature of 120 °C and the film was pressed to the metallic substrate for 90 seconds under a pressure of 35 kN at 120 °C the lamination of the film of the metallic surface and cooled afterward to allow re-solidification of the hotmelt 1. The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.The lap shear strength of the thermally conductive resin in the reference example was 4.8 MPa, whereas the lap shear strength of the composite (thermally conductive resin and the layer LL) was slightly higher andreached 6,2 MPa for inventive example 1 and 5.4 MPa for inventive example 2. The results of the lab shear test are summarized in table 2.Table 2: Lab shear strength of comparative example and inventive examplesThe results show that the presence of the layer (LL) does not negatively impact the adhesion performance of the adhesive layer (LA). On the contrary, in the case of Hotmelt 1, an increase in the lab shear strength can even be observed.4.1.4 Inventive example 3: both cleaned aluminum-specimens (AI6016) with 2 mm thickness were each coated with0.4 g Hotmelt 3 (LL) film of a thickness of 0.2 mm. The hotmelt amount in the overlap area was 0.15 g. The press was heated at a temperature of 120 °C and the film was pressed to the metallic substrate for 90 seconds under a pressure of 35 kN at 120 °C the lamination of the film of the metallic surface and cooled afterward to allow re-solidification of the hotmelt 3. The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.4.1.5 Inventive example 4: both cleaned aluminum-specimens (AI6016) with 2 mm thickness were each coated with 0.4 g Hotmelt 3 (LL) film of a thickness of 0.2 mm. The hotmelt amount in the overlap area was 0.15 g. The press was heated at a temperature of 120 °C and the film was pressed to the metallic substrate for 90 seconds under a pressure of 35 kN at 120 °C the lamination of the film of the metallic surface and cooled afterward to allow re-solidification of the hotmelt 3. The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.4.2 Debonding of the compositeThe composites of the comparative example and of the inventive examples 1 and 2 were placed in a convective oven at a temperature of 60 °C. The temperature was increased every 10 minutes of 10 °C. At a temperature of 110 °C the composites of inventive examples 1 and 2 could be easy separated by hand peeling.Moreover, the composite of inventive examples 3 and 4 were placed in a convective oven at a temperature of 40 °C. The temperature was increased every 10 minutes of 10 °C. At a temperature of 60 °C the composites of inventive examples 3 and 4 could be easy separated by hand peeling.The comparative example was not debondable.4.3 Measurement of the thermal conductivity of adhesive layer LA:The thermal conductivity for the thermally conductive resin (or gap filler) was measured according to ASTM D5470, using a device from Linseis. In this measurement, the specimen is placed between a hot and a cooled reference material. A heat flow is created between the reference materials and is measured by thermocouples. Knowing the specimen geometry and the applied heat flow, the thermal resistance is calculated. Having determined the thermal resistance, the effective thermal conductivity etf at a certain specimen thickness is available by deviation of thickness by heat flow. This etf value implements besides the thermal resistance of the specimen also the contact resistance generated by surface-to-surface contact of specimen and reference material. Here, the thermally conductive resin has etf of 1 .74 W / mK at 1 mm thickness.To measure the thermal conductivity of the overall system (composite) consisting of the thermally conductive resin (with 2.45 mm thickness) with the layer (LL; with 0.15 mm thickness) and to compare it with the thermally conductive resin, the etf was measured at 2.6 mm. The thermal conductivity of the composite material was 81 % compared to that of the thermally conductive resins, with the same thickness.5 Application of layer (LL) as a polymer dispersionWhen a dispersion was used as debondable layer the following methods and measurements were used for its characterization.5.1 Methods and measurementsViscosity of the dispersion is measured according to DIN EN ISO 3219-2:2021 (at 23°C and a shear rate of 250 S’1).The dispersions are dried in a mold at 40°C for 3 days and then at 23°C for 7 days. Thermal properties are measured by differential scanning calorimetry.Glass-transition temperature (as the midpoint temperature of the second heating curve at a heating rate of 20 K / min), melting-points and enthalpy ef fusion are determined according to DIN ISO 11357 (2018) (melting point = peak temperature) by heating with 20 K / min after cooling to -80°C; while enthalpy ef fusion of the second run (Delta H2) is calculated from the area of second melting only; a) from a film at its untreated state (drying see above) Tm1 , Delta H1b) after heating the polyurethane films to 130 °C, cooling with 20 K / min to -80°C; reheating with 20k / min-> Tm2 delta H2The K-value was determined according to DIN EN ISO 1628-1 :2021.Film preparation for shore-hardness: A siliconized mould (14,514,5cm) is filled with 150 g of the dispersion. The material is dried on a heating plate at 40°C for 3 days. Then further dried to constant weight at 85°C in an oven, then at 23°C for another 7 days.Shore hardness is measured according to DIN ISO 48-4:2018; (3 films are stacked to give 6mm thickness); temperature: 23 °C 1 50 % relative humidity, Measuring time: 3 seconds .2 Amorphous PUD - Dispersion 1310 g of a polyesterdiol made of adipic acid, 1.6 hexanediol and neopentyl glycol (OH number = 56 mg KOH / g), is reacted with 73 g 1.4- Butanediol and 151 g toluylenediisocyanate (80 / 20 mixture of isomers) in 131 g dry acetone starting at 45°C and heating up to 65- 68 °C, keeping there for 30 min. Then 0.08 g tetrabutyl titanate as catalyst is added and the reaction continued for 60 min. Then 27.6 g hexamethylenediisocyanate (HDI) is added and the reaction is continued until the NCO-value is 0.9%. The mixture is diluted with 586 g acetone and cooled to 50°C.The chain extension is done with 32 g of a 40% (weight percentage), aqueous solution of Aminoethyl- aminopropionic acid sodium salt, fed in 1 min and reacted for 10 min while heating to 55°C. Then 844 g of deionized water is fed over 45 min. The acetone is removed by vacuum distillation, using 0.1 g of defoamer Foamstar PB 2724 (modified polyalkylene glycol, BASF). Solids content is 42.6%.3 PUD with Carbodiimid - Dispersion 2676 g of a polyesterdiol from adipic acid and 1 ,4 butanediol (OH number 45) are reacted with 0.11 g titaniumtetrabutylate, 40 g IPDI , 0,77 g NCO-terminated polycarbodiimid Elastostab H02 , BASF) at 60°C in 153 g dry acetone for 60 min. Then 37.8 g HDI is added and the temperature raised to 74°C. The reaction is continueduntil the NCO-value is lower than 1,25%. The mixture is diluted with 539 g acetone and cooled to 35-40°C. Then 22.4 g of Aminoethyl aminoethansulfonate sodium salt (50% in water) diluted with 22 g dem. water is added in 3 min, followed by 4.6 g Isophoronediamine diluted in 23 g dem. water also in 3 min. Before disperga- tion 38.7 g of a 20% aqueous solution of Lutensol AT18 (Ethoxylated (18EO) C16-C18 fatty alcohol) BASF) is added as, followed by dispergation with 463 g demineralized water in 15 min, Immediately after the water feed, 4 g of N-( 2- aminoethyl)-ethanolamine in 30 g water is added in 15 min , with additional amount of 200 g dem. water. The acetone is removed by vacuum distillation with the help of two drops of defoamer (FoamStar PB 2724: modified polyalkylene glycol, BASF) and the solids content adjusted to 50% .5.4 Dispersion 3The example 1 in W0201213506 was repeated: solid content is 40%.5.5 Dispersion 4: crystalline PUD663,9g of a polyesterdiol from adipic acid and 1.4 butanediol (OH number 46) is reacted with 27.12 g IPDI and 40.4 g HDI at 100°C in 60 g dry acetone until a NCO-value between 1.00% - 0.97% is reached. The mixture is diluted with 804 g acetone and cooled to 40°C. The chains are stopped by adding a mixture of 3.55 g Diethanolamine, 0.83g N-( 2- aminoethyl)-ethanolamine and 16 g dem. Water. Then, 14.1 g of Aminoethyl-ami- noethane-sulfonate sodium salt (50% in water) diluted with 17g dem. water is added in 3 min. After 10 min the dispersion is continued in 30 min. with 718 g deionized water. The acetone is removed by vacuum distillation with the help of two drops of defoamer (FoamStar PB 2724, BASF). To stabilize the dispersion, 74 g of a 20%solution of Lutensol AT 18 (BASF) is added and the solids content adjusted to 50 % ..6 Dispersion 5: 2 Tg Dispersions1039 g of a polyesterdiol from adipic acid and Isophthalic acid (molar 1 : 1) and 1.6 hexanediol (molecular weight 2000 g / mol), 104.6 g of dimethylolpropionic acid (DMPA,), 186.8 g Butanediol-1 ,4 were reacted with 900 g IPDI) in 530 g dry acetone in a pressurized reactor; starting at 50°C, increasing the temperature in 30 min to 90°C, then at 90°C for 8 h at 2.9 bar. The mixture was diluted with 1852 g acetone and cooled to 40°C and expanded to atmospheric pressure. The NCO-value was determined to 1.2%. Then 10.2 g of Isophoronediamine were added in a shot, followed by 81 g Diethylethanolamine (neutralization agent) in 5 min. After 5 min stirring, the dispersion step was continued with 3567 g deionized water in 37 min at 30°C, followed by an addition of 19.8 Diethylenetriamine in 340 g deionized water in 30min. The acetone was removed by vacuum distillation with the help of 0.23 g of defoamer (FoamStar PB 2724, BASF) and the solids content was 37.4%.. Application of the dispersions on a metallic substrate .1 Spray application of the dispersion 1 , 2 and 3 on 120 mm X 25 mm isopropanol cleaned aluminum-specimen (AI3003) with 2 mm thicknessThe dispersion 3 was applied by using a pressurized spraying gun from the company SATA (air pressure: 4 Bar), equipped with a 1.3 mm nozzle on 3003 Aluminum lab shear specimens from the company Rocholl. The amount of sprayed dried dispersion was controlled by weighting the specimen after water evaporation and resulted to be 60g / m2. .2: Spray application of the dispersion 1on a 120 mm X 25 mm isopropanol cleaned aluminum-specimen (AI6016) with 2 mm thicknessThe dispersion 1 was applied by using a pressurized spraying gun from the company SATA (air pressure: 4 Bar), equipped with a 1.2 mm nozzle on cleaned 6016 Aluminum lab shear specimens from the company Rocholl. The amount of sprayed dried dispersion was controlled by weighting the specimen after water evaporation and resulted to be 130g / m2. Raw materials for thermally conductive adhesive as an example for layer (LA)Polyol 3: castor oil based polyether / -ester polyol having an OH-number of 170-180 mgKOH / g.Additive 1 : silane-based adhesion promoterFiller 1 : AEROSIL® R 202 is a fumed silica after-treated with polydimethylsiloxane from Evonik.TO filler 1 : alkyl-silane treated aluminium trihydroxide having a particle size D90 of about 100 m Chain extender mix: 1 , 2-propy lene glycol and dipropylene glycol (ratio = 1 :1 .32) Cross-linker: glycerine (97.7%)Drying agent 1 : alkali aluminosilicateDrying agent 2: water scavenger for isocyanates (Luna PTSI)Catalyst 1 : dioctyltin mercaptide catalystColor tint: tint for A componentIso 2: isocyanurate modified hexamethylene diisocyanate, NCO content 22 wt.-% Application of the adhesive layer (LA) according to the formulations as given in Table 4The composition composed of component A and the component B are shown in Table 4. Polyol and isocyanate component were obtained as follows:Polyol components: in a speed blender cup all liquid components and on top of them the fillers are added (in total 500 g). These ingredients are then stirred with a speed mixer for 1 min at 800 rpm and another minute at 1600 rpm. Then the mixing is continued for 10 minutes under vacuum at 800 rpm.Isocyanate component: in a speed blender cup all liquid components and on top of them the fillers are added (in total 200 g). These ingredients are then stirred with a speed mixer for 1 min at 800 rpm and another minute at 1600 rpm. Then the mixing is continued for 10 minutes under vacuum at 800 rpm.Subsequently, the A and B components were transferred into a dual cartridge. This allows for easy mixing directly during application. With a volumetric 1 to 1 ratio, an index of 116 (disregarding any OH groups fromfillers and disregarding the isocyanates from drying agent 2) is obtained. The index defines the equivalent ratio of NCO to OH groups. An index of 116 means that there are 116 isocyanate groups for every 100 OH groups. Both component A, component B, and the mixture exhibited good, low paste viscosity, enabling smooth dispensing from the cartridge.Table 4: Composition of component A and the component B9. Lap shear strength (LSS)The lap shear strength measurements were conducted in accordance with ISO 4587 / DIN EN 1465. Here, the samples are prepared by forming a layer of adhesive (as described in example 8) between two 100 mm x 25 mm isopropanol cleaned Al specimens (3003) and between two 100 mm x 25 mm isopropanol cleaned Al specimens (6016), both with a thickness of 2 mm from Rocholl, which overlap to create a bond area of approximately 12.5 mm x 25 mm. In the case of patent-relevant examples, the thermally labile sacrificial layer (LL), in the form of a dispersion, was coated on one of these substrates (see detailed description of the application of the dispersion). The adhesive layer is 1.0 mm thick. The adhesive is applied, and the samples are assembled at room temperature and cured for 7 days at room temperature. The measurement is performed at room temperature with a pulling speed of 5 mm / min, and the resulting lap shear strength (LSS) is recorded in MPa.In order to test the adhesion loss of the adhesive at a temperature of 85 and 110°C, the samples were additionally tested at the desired higher temperature.Comparative example 2: For lap shear strength measurements of the thermally conductive resin, the samples (according to example 8) are prepared by forming a layer of the adhesive between two 120 mm X 25 mm isopropanol cleaned aluminum-specimen (AI3003) with 2 mm thickness, that overlap to form a bond area of about 14.5 mm X 25 mm. The adhesive layer is 1.0 mm thick. The adhesive is applied, and the test samples were assembled at room temperature and cured for 5-7 d at room temperature. The measurement was performed at room temperature with a pulling speed of 10 mm / min and the resulting lab shear strength is recorded in MPa.Inventive example 3: For lap shear strength measurements of the overall composite, one of two cleaned alu- minum-specimens (AI3003) with 2 mm thickness was coated with the Dispersion 3 (LL) (60g / m2 applied as described in 6.1). The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.Inventive example 4: For lap shear strength measurements of the overall composite, one of two cleaned alu- minum-specimens (AI3003) with 2 mm thickness was coated with the Dispersion 2 (LL) (130g / m2 applied as described in 6.1). The application of the adhesive (LA), the curing process, and the setup followed the same procedure as that of thermally conductive resin.The generated values are reported in table 5.Table 5: Lab shear strength of comparative example and inventive examplesMoreover, to additional bonded specimens according to inventive examples 3 and 4, a Shear Adhesion Failure Temperature (SAFT) test was effectuated. The bonded substrates were securely fixed in an oven, with a known weight of 1100 g. attached to them. The oven temperature was set to 80°C and increased every 15minutes of 10°C. The temperature at which the substrates separated from each others was recorded. The resulting values are reported in table 5.Literature citedWO 2019 / 175151 A1 WO 2018 / 156689WO9932554

Claims

Claims1 . Composite comprising a layer (LL) and an adhesive layer (LA) which are at least partially in contact, wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from 40 °C to 200 °C.

2. The composite according to claim 1 , wherein the layer (LL) comprises a thermoplastic polyurethane.

3. The composite according to any one of claims 1 or 2, wherein the composite comprises a first part (P1) which is at least partially connected to the layer (LL) and a second part (P2) which is at least partially connected with the adhesive layer (LA).

4. The composite according to any one of claims 1 to 3, wherein the first part (P1) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass, rubber, cement, minerals.

5. The composite according to any one of claims 1 to 4, wherein the second part (P2) comprises a foamed polymer, a compact polymer, a metal, leather, wood, a ceramic material, a textile material, glass rubber, cement, minerals.

6. The composite according to any one of claims 1 to 5, wherein the adhesive layer (LA) comprises an adhesive selected from polyurethanes, epoxy resins, acrylates, silicon based adhesives and polyvinyl acetates.

7. The composite according to any one of claims 1 to 6, wherein the adhesive layer (LA) is prepared from a polyurethane based adhesive.

8. The composite according to any one of claims 1 to 7, wherein the layer (LL) and / or the adhesive layer (LA) comprises one or more additives (A1).

9. Process for preparing a composite comprising a layer (LL) and an adhesive layer (LA), the process comprising(1) providing the layer (LL);(2) at last partially joining the layer (LL) with the adhesive layer (LA); wherein the layer (LL) comprises a polymer composition with a softening temperature in the range of from 40 °C to 200 °C.

10. The process according to claim 9, wherein the layer (LL) is applied to a first part (P1) prior to step (1).

11. The process according to any one of claims 9 or 10, wherein the layer (LL) is applied as a film.

12. The process according to any one of claims 9 or 10, wherein the layer (LL) is applied as an aqueous polyurethane dispersion, preferably by spraying, doctor blading, deep coating or brushing.

13. The process according to any one of claims 9 to 12, wherein the adhesive layer (LA) is at least partially connected to a second part (P2).

14. A composite obtained or obtainable according to a process according to any one of claims 9 to 13.

15. The composite according to claim 14, wherein the layer (LL) is at least partially connected to a surface, preferably to a surface of a first part (P1), and the peeling strength for debonding between layer (LL) and the surface is greater than 40 mN / m2, determined according to ASTM D3330.

16. The process according to any one of claims 9 to 13, wherein the composite is separated into its parts by applying debonding conditions (CD), preferably wherein the debonding conditions (CD) comprise heat, treatment with solvents or both.

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