EP(D)M hose with low molecular weight polymers

Abstract

The present invention relates to a multi-layer hose comprising the following layer structure: - an outer layer comprising one or more elastomer layers, - one or more adhesive layers formed by means of a rubber solution, the rubber solution comprising at least one solid rubber and at least one liquid rubber, and - an inner layer comprising one or more elastomer layers, wherein the one or more adhesive layers are arranged between the outer layer and the inner layer. The present invention further relates to a method for producing a multilayer hose and the use of the multilayer hose.

Description

The present invention relates to a multilayer hose comprising an elastomeric outer layer and an elastomeric inner layer, a method for manufacturing the multilayer hose and the use of a multilayer hose.Prior ArtIn the production of a multilayer hose, different hose layers are connected to one another, wherein often one or more reinforcing layers are arranged between the hose layers.In order to ensure a firm bond and a defect-free functioning of the hose, the hose layers must be connected to one another. For this purpose, rubber mixtures are frequently used which are applied in the form of rubber solutions in thin layers and form adhesion layers after vulcanization.The rubber solutions used, which are also referred to as vulcanizing solutions, generally have a high content of organic solvent. This leads to high VOC emissions during hose production. VOC is the abbreviation for volatile organic compounds (VOCs). These VOC emissions are environmentally and hazardous.The rubber solutions contain solid rubbers and are obtained by mixing a rubber mixture containing solid rubber with the solvent in a solution kneader. The mixing process for forming a solution is energy-consuming.DESCRIPTION OF THE INVENTIONIn view of the foregoing, there is a need for a method of manufacturing a multilayer hose containing adhesive layers formed from gum solutions which reduces the above-described disadvantages of the prior art.In particular, the object consisted in providing a multilayer hose and a method for producing the same which is associated with the lowest possible VOC emission. In addition, the production of the rubber solutions used for the adhesive layers should require the lowest possible energy input. Naturally, the adhesion properties of the adhesive layers should still be sufficient and at least not significantly deteriorate.Surprisingly, it has been found that the object can be achieved by using a combination of liquid rubber and solid rubber in the rubber solution for the production of a multilayer hose. In the prior art, only solid rubbers are used for the rubber solution.Accordingly, the present invention relates to a multilayer hose comprising the following layer construction:an outer layer comprising one or more elastomer layers,one or more adhesive layers formed by means of a rubber solution, wherein the rubber solution comprises at least one solid rubber and at least one liquid rubber, andan inner layer comprising one or more elastomer layers,wherein the one or more adhesive layers are disposed between the outer layer and the inner layer.The use of a combination of liquid and solid rubbers for the rubber solution gives low-viscosity compounds which, in contrast to prior art rubber solutions based on solid rubbers, can be further processed to give a rubber solution with a significantly reduced amount of organic solvent. In hose production, the reduced concentration of organic solvent results in reduced VOC emissions. As a result, the environment is less stressed compared to rubber solutions of the prior art.Furthermore, the combination of liquid and solid rubbers also significantly reduces the energy requirement for the production of the rubber solution by mixing or kneading in comparison with the prior art.The adhesion or adhesive properties of the rubber solutions used according to the invention in the hose are here surprisingly approximately equivalent to those achieved with conventional rubber solutions.The invention is explained in detail below.The multilayer hose according to the invention has an outer layer and an inner layer. The outer layer and the inner layer are in particular an elastomeric outer layer and an elastomeric inner layer. The multilayer hose is therefore in particular a rubber hose.The outer layer and the inner layer each comprise one or more elastomer layers or are formed therefrom. The outer layer and the inner layer can, for example, each comprise one, two, three or more than three elastomer layers. The number of elastomer layers in the outer layer and the inner layer can be the same or different.The outer layer and the inner layer can be the same or different from one another with regard to their quantitative and / or qualitative composition. If the inner layer and / or the outer layer comprise more than one elastomer layer, the respective elastomer layers of the inner layer or of the outer layer can be the same as or different from one another with regard to their quantitative and / or qualitative composition.The one or more elastomer layers of the inner layer and of the outer layer are each formed from an elastomer which is based on one or more rubbers and / or one or more thermoplastic elastomers. The elastomer or the elastomer layer comprises the rubber or rubbers and / or thermoplastic elastomers in vulcanized form. The vulcanized rubber or rubbers and / or thermoplastic elastomers form the matrix of the elastomer layer, which may optionally contain one or more conventional additives.Examples of the rubbers and / or thermoplastic elastomers for the elastomer layers of the outer layer and / or of the inner layer are each independently selected from the group consisting of ethylene-propylene rubber (EPM), ethylene-propylene-diene rubber (EPDM), nitrile rubber (NBR), (partially) hydrogenated nitrile rubber (HNBR), fluoro rubber (FPM or FKM), chloroprene rubber (CR), natural rubber (NR), styrene-butadiene rubber (SBR), isoprene rubber (IR), butyl rubber (IIR), bromobutyl rubber (BIIR), chlorobutyl rubber (CIIR), butadiene rubber (BR), chlorinated polyethylene (CM), Chlorosulfonated polyethylene (CSM), polyepichlorohydrin (ECO), ethylene vinyl acetate rubber (EVA), acrylate rubber (ACM), silicone rubber (MVQ), fluorinated methyl silicone rubber (MFQ), perfluoro rubber (FFPM or FFKM), polyurethane (PU) or combinations thereof.In a preferred embodiment, the one or more elastomer layers of the outer layer are based on ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or a mixture thereof, preferably EPDM. In a preferred embodiment, the one or more elastomer layers of the inner layer are based on ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or a mixture thereof, preferably EPDM.EPM and EPDM are advantageous since they have particularly good chemical resistance, in particular to brake fluid.The one or more elastomeric layers of the inner layer and the outer layer may further contain one or more additives common in the rubber art. As a rule, the rubber mixtures for the elastomer plies comprise at least one crosslinking agent or crosslinking system for vulcanization. Examples are sulfur-based crosslinkers or crosslinker systems and peroxide crosslinkers or crosslinker systems. Further examples of additives which are usually used are fillers, processing auxiliaries, plasticizers, antioxidants or combinations thereof and also, if appropriate, further additives, such as, for example, fibers and color pigments. In this regard, reference is made to the general state of rubber compounding technology. Concrete examples of the filler are mentioned below with respect to the rubber solution.In general, it is preferred that the tube according to the invention comprises one or more textile reinforcing layers arranged between the inner layer and the outer layer. The textile reinforcing layer can optionally each be equipped with an adhesion promoter. It can be, for example, one, two, three or more than three reinforcing layers.The reinforcing layer or layers are preferably a woven fabric, a knitted fabric, a braided fabric or a knitted fabric, a braided fabric being preferred. If more than one reinforcing layer is used, these can be identical or different with regard to textile type and / or material.Materials used for the textile reinforcing layer can be any known and suitable materials known to the skilled person. The materials are in particular in the form of fibers, threads or cords from which the textile reinforcing layer is formed.Examples of materials from which the textile reinforcing layer or layers can be formed are polyamide (PA), for example PA6, PA6.6, PA11, PA12, PA6.10, PA6.12, copolyamides, polyester (PES), rayon, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polycarbonate (PC), unsaturated polyester resin (UP), poly(1,4-cyclohexanedimethylene terephthalate) (PCDT), cotton, staple viscose, polyvinyl alcohol (PVAL), polyoxybenzonaphthoate, polyvinyl acetal (PVA), polyetheretherketone (PEEK), polyethylene-2,6-naphthalate (PEN), polyphenylene, polyphenylene oxide (PPO), and the like, Polyphenylene sulfide (PPS), polyphenylene ether, polybenzoxazole (PBO), polyoxadiazole (POD), polyetherimide (PEI), m-aramid, p-aramid, glass, basalt, metal, carbon, ceramic, carbon, wool, polypropylene, melamine, modified viscose, rock, highly crystalline polymer fibers, fluoropolymers such as fluorosilicone, polytetrafluoroethylene (PTFE), and perfluoroethylenepropylene (FEP), fluorocopolymers such as poly(vinylidene fluoride-co-hexafluoropropylene (VDF / HFP), poly(vinylidene fluoride-co-hexafluoropropylene-co-tetrafluoroethylene) (TFB), Poly(vinylidene fluoride-cotetrafluoroethylene-co-perfluoromethyl vinyl ether) (VDF / TFE / PMVE), poly(tetrafluoroethylene-co-propylene) (TFE / P), and poly(vinylidene fluoride-cochlorotrifluoroethylene) (VDF / CTFE). The materials for the reinforcing layer may be used alone or in combination of two or more of these materials. The combinations of two or more materials can also be used in the form of so-called hybrid systems.In a preferred embodiment, the one or more textile reinforcing layers are formed from rayon, polyvinyl alcohol (PVAL), aramid, such as m-aramid or p-aramid, polyamide or a hybrid system of two or more of the materials mentioned. These materials are distinguished by good dynamic performance and at the same time a small volume increase with an increase in temperature, which is advantageous in particular for brake hoses. The one or more textile reinforcing layers are preferably formed from PVAL.The multilayer hose according to the invention comprises one or more adhesive layers arranged between the outer layer and the inner layer. The adhesive layer serves for connecting the outer layer to the inner layer and optionally present textile reinforcing layers. For example, one, two or more than two adhesive layers may be present. The adhesive layers can be the same or different from one another with regard to their quantitative and / or qualitative composition.The one or more adhesive layers are each formed from a rubber solution comprising at least one solid rubber and at least one liquid rubber. To form the adhesive layer, the rubber mixture is applied in the form of the rubber solution to the inner layer, outer layer and / or the reinforcing element, usually in thin layers and then, if appropriate after drying, vulcanized. The rubber solution is in particular liquid.In the rubber solution, the at least one solid rubber and the at least one liquid rubber are dissolved and / or dispersed in at least one organic solvent.Suitable rubbers for the solid rubber and the liquid rubber are, in principle and independently of one another, all of the abovementioned types of rubber for the elastomer layers of the outer layers and inner layers. The types of the rubbers of the liquid and solid rubbers may be the same or different.The at least one liquid rubber is preferably selected from liquid ethylene propylene diene rubber (EPDM), liquid butadiene rubber or a mixture thereof, liquid EPDM being particularly preferred.The at least one solid rubber is preferably selected from solid ethylene-propylene-diene rubber (EPDM), solid ethylene-propylene rubber (EPM) or a mixture thereof.Liquid rubbers are usually relatively short-chain or low molecular weight polymers. The liquid rubber may be functionalized.A liquid rubber is a rubber that is flowable or liquid at room temperature (23° C.). They may in part have a honey-like consistency. Liquid rubbers are distinguished by a low viscosity compared with solid rubbers.In contrast, a solid rubber is solid at room temperature (23° C.).In a preferred embodiment, the at least one liquid rubber has a weight-average molar mass, determined by means of gel permeation chromatography, of from 1,000 g / mol to 70,000 g / mol, preferably from 20,000 g / mol to 60,000 g / mol, more preferably from 40,000 g / mol to 50,000 g / mol. In a preferred embodiment, the at least one solid rubber has a weight-average molar mass, determined by gel permeation chromatography, of from 80 000 g / mol to 650 000 g / mol, preferably from 100 000 g / mol to 600 000 g / mol.The weight-average molar mass determined by means of gel permeation chromatography (GPC) refers here in particular to a GPC determination in tetrahydrofuran (THF) at 35° C. using a polystyrene standard.The solid rubbers are the usual commercial products. Liquid rubbers are likewise commercially available, for example the Trilene® types from Lion. Preference is given to the Trilene® types based on EPDM, such as Trilene® 65, Trilene® 66, Trilene® 67, Trilene® 76, Trilene® 77.The weight ratio of the at least one liquid rubber to the at least one solid rubber (weight of liquid rubber:weight of liquid rubber) in the rubber solution or in the adhesive layer can be, for example, in the range from 1:1.5 to 1:99, preferably from 1:2 to 1:20, in particular 1:2.3 to 1:19.Preferably, in the rubber solution or in the adhesive layer, the proportion of the at least one liquid rubber is 1 to 30 phr, preferably 5 to 30 phr, and the proportion of the at least one solid rubber is 99 to 70 phr, preferably 95 to 70 phr. The unit phr customary in rubber technology means parts per 100 parts of rubber.The gum solution contains at least one organic solvent. Suitable organic solvents are all solvents in which rubber can be dissolved, these usually being nonpolar organic solvents. The organic solvent may be selected, for example, from aliphatic and / or aromatic solvents, such as chlorinated hydrocarbons, toluene, benzene or gasoline. For practical considerations, gasoline, especially mineral spirits or mineral spirits, is preferred. Gasoline, in particular mineral spirits or mineral spirits, generally comprises a mixture of alkanes (linear and / or cyclic), alkenes and / or aromatic hydrocarbons.The proportion of the at least one organic solvent in the rubber solution is, for example, in the range from 50 to 65% by weight, preferably 52.5 to 55% by weight, based on the total weight of the rubber solution. In contrast, in the case of the conventional rubber solutions based on solid rubber, significantly higher proportions of organic solvent are required. Thus, the proportion of organic solvent in a conventional rubber solution based on solid rubber is generally more than 60% by weight, based on the total weight of the rubber solution. The gum solution preferably contains less than 0.1 wt% water and is preferably free of water.The rubber solution or the adhesive layer formed therefrom may further contain one or more additives which are customary in the field of rubbers. The rubber solution or the adhesive layer contains at least one cross-linking agent or cross-linking system for vulcanization, such as e.g. sulfur-based cross-linking agents or cross-linking agent systems and peroxide cross-linking agents or cross-linking agent systems. Preferably, at least one peroxide is present as crosslinker or vulcanization agent. Further examples of additives which are usually used are fillers and adhesion promoters.The rubber solution or the adhesive layers formed therefrom preferably comprises at least one filler. Possible fillers are known to the skilled person in the art. The at least one filler is preferably selected from the group comprising carbon black, graphite, carbon nanotubes (CNT), silica, calcium silicates, aluminum silicates, kieselguhr, kaolin, limestone, zeolites, cyclodextrins, feldspar, talc, chalk, alumina gel, fibers (short or long fibers, glass fibers, carbon fibers, aramid fibers), whiskers (aluminum oxide, silicon carbide), mica, magnetite, zinc oxide, core / shell fillers, asphalt, hard rubber dust, chlorides, carbonates, sulfates, oxides and hydroxides of alkali metals and alkaline earth metals, Al(OH) 3, polyvinyl chloride (PVC), polymer powder, flakes, inorganic or organic pigments, organic or inorganic acids, glass beads, and mixtures of carbon fibers and carbon fibers, and mixtures of carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon fibers, and carbon, Wood flour, nutshell flour.The multilayer hose is in particular a flexible multilayer hose.The hose according to the invention can optionally additionally contain at least one further intermediate layer, preferably an elastomeric layer based on at least one rubber, which is arranged between the outer layer and the inner layer.In a preferred embodiment, the multi-layer hose is a brake hose, coupling hose, cooling water hose, dispensing hose, filling hose, chemical hose, heatable hose, drinking water hose, food hose, manifold hose, fuel hose, offshore and marine hose, bunker hose, air conditioning hose or paint spray hose. It is particularly preferred that the multi-layer hose is a brake hose.The multilayer tube of the present invention as described above is preferably obtained by the process of the present invention described below.The present invention further relates to a method for producing a multilayer hose, in particular a multilayer hose according to the invention as described above, using a rubber solution comprising at least one solid rubber, at least one liquid rubber and at least one organic solvent, wherein the method comprises the following steps: a) constructing an arrangement comprisinga1) two single- or multi-ply rubber sheets for the inner layer and the outer layer, wherein before or during the construction of the arrangement the rubber solution is applied to one side of one or both sheets, so that the applied rubber solution is arranged between the two sheets, ora2) two single- or multilayer rubber sheets for the inner layer and the outer layer and one or more textile reinforcing elements which are arranged between the two rubber sheets, wherein, before or during the construction of the arrangement, the rubber solution is applied to one side of one or both sheets and / or to at least one side of a textile reinforcing element, such that the applied rubber solution is arranged between the two sheets,b) vulcanizing the assembly to form the multi-layer hose.The above explanations regarding the multilayer hose according to the invention apply analogously to the method according to the invention for producing a multilayer hose, so that reference is made thereto. In particular, the rubber solution has already been described above.The single- or multi-ply rubber sheets for the inner layer and the outer layer form, after vulcanization, the inner layer and outer layer, respectively, each comprising the one or more elastomer layers. The rubber sheets contain the rubber in unvulcanized form and the elastomer layers contain the rubber in vulcanized form. The textile reinforcing element or elements form the textile reinforcing element layer or layers.The single- or multi-ply rubber sheets for the inner layer and the outer layer are in particular sheets, mats or webs which are produced in the customary manner, for example by calendering or extrusion or coextrusion. The sheets are sufficiently flexible to be bent into a tubular shape.In the method according to the invention, an arrangement is built in a first step from the components of the hose to be produced. The arrangement is usually built on a mold such as a mandrel or a metal tube. The method according to the invention can be a winding method. The application of the gum solution to the respective surface can also be effected in the usual manner, for example by brushing, rolling, spraying or dipping. In general, it is preferred if the rubber solution is applied to the respective surface during the construction of the arrangement.In a simple embodiment a1) an assembly is built which comprises two single- or multi-ply rubber sheets for the inner layer and the outer layer, wherein before or during the construction of the assembly the rubber solution is applied to one side of one or both sheets, so that the applied rubber solution is arranged between the two sheets.In a preferred embodiment a2), an arrangement is built which comprises two single- or multi-ply rubber sheets for the inner layer and the outer layer and one or more textile reinforcing members which are arranged between the two rubber sheets, wherein before or during the construction of the arrangement the rubber solution is applied to one side of one or both sheets and / or to at least one side of a textile reinforcing member, such that the applied rubber solution is arranged between the two sheets. In this alternative, it is generally preferred if the rubber solution is applied to one side of at least one textile reinforcing element.In a preferred embodiment, the construction comprises building the arrangementi) placing a reinforcing element on one of the single- or multi-ply rubber sheets,ii) applying the rubber solution to the applied reinforcing member,iii) optionally placing a second reinforcing element on the reinforcing element provided with the rubber solution,iv) placing the second single- or multi-ply rubber sheet on the reinforcing element provided with the rubber solution or on the second reinforcing element placed on.In the variant with optional step iii), a second reinforcing element is additionally placed on the reinforcing element provided with the rubber solution, wherein the second single- or multi-ply rubber sheet is placed on the placed second reinforcing element in such a case.In these preferred embodiments, one or two reinforcing layers are incorporated into the multilayer hose. Of course, more than two reinforcing members can also be placed in the arrangement, wherein, if appropriate, an additional rubber solution is applied to one of the further reinforcing members in the meantime.The assembled assembly is then vulcanized to form the multi-layer hose, e.g., in a vulcanization chamber. The vulcanization of the arrangement takes place according to the usual methods of rubber technology, with which the person skilled in the art is familiar. The vulcanization is generally carried out at elevated temperature and, if appropriate, elevated pressure. For example, the vulcanization can be carried out at a pressure in the range from 5.5 to 8 bar absolute, preferably from 6.5 to 7.5 bar absolute.In a preferred embodiment, the method according to the invention also comprises the production of the rubber solution. In a preferred alternative A, the preparation of the gum solution comprises1a) compounding the at least one solid rubber with the at least one liquid rubber to obtain a compound; and2a) adding at least one organic solvent to the compound obtained and mixing, preferably by means of a solution kneader, to obtain the gum solution.In an alternative B, the preparation comprises the rubber solution1a) adding at least one organic solvent to the at least one solid rubber and mixing, preferably by means of a solution kneader, to obtain a rubber solution precursor, and2a) adding the at least one liquid rubber to the gum solution precursor to obtain the gum solution.The mixing of the rubbers with the solvent to form the rubber solution is preferably carried out with a solution kneader. Particularly at the beginning of the mixing or dissolving process, high shear forces and accordingly a high energy requirement are required. A particular advantage of the method according to the invention is that the energy requirement in the production of the rubber solution used according to the invention can be significantly reduced compared to the production of conventional rubber solutions. This also reduces the heating during the mixing process. Without wishing to be bound by theory, it is believed that these advantages are due to the fact that the liquid rubber has a low viscosity.It is understood that when additives such as crosslinkers, adhesion promoters and / or fillers are used, they are mixed into the rubber solution at a suitable point in time. As a rule, it is expedient to add additives before the addition of the organic solvent.The present invention also relates to the use of the multilayer hose according to the invention as industrial hose.The multi-layer hose can be used, for example, as a brake hose, coupling hose, cooling water hose, dispensing hose, filling hose, chemical hose, heatable hose, drinking water hose, food hose, manifold hose, fuel hose, offshore and marine hose, bunker hose, air conditioning hose or paint spray hose. The multilayer hose according to the invention is suitable in particular for use as a brake hose.

Claims

Multilayer hose comprising the following layer structure: - an outer layer comprising one or more elastomer layers, - one or more adhesive layers formed by means of a rubber solution, wherein the rubber solution comprises at least one solid rubber and at least one liquid rubber, and - an inner layer comprising one or more elastomer layers, wherein the one or more adhesive layers are arranged between the outer layer and the inner layer.The multilayer hose of claim 1, wherein the hose comprises one or more fabric reinforcing layers disposed between the inner layer and the outer layer.The multilayer hose according to any one of claims 1 or 2, wherein the at least one liquid rubber is selected from ethylene propylene diene liquid rubber (EPDM), butadiene liquid rubber or a mixture thereof, and / or the at least one solid rubber is selected from ethylene propylene diene solid rubber (EPDM), ethylene propylene solid rubber (EPM) or a mixture thereof.The multilayer hose according to any of claims 1 to 3, wherein the at least one liquid rubber has a weight-average molar mass, determined by gel permeation chromatography, of from 1,000 g / mol to 70,000 g / mol, preferably from 20,000 g / mol to 60,000 g / mol, more preferably from 40,000 g / mol to 50,000 g / mol, and / or the at least one solid rubber has a weight-average molar mass, determined by gel permeation chromatography, of from 80,000 g / mol to 650,000 g / mol, preferably 100,000 g / mol to 600,000 g / mol.The multilayer hose according to any one of claims 1 to 4, wherein the weight ratio of the at least one liquid rubber to the at least one solid rubber in the rubber solution is in the range of 1:1.5 to 1:99, preferably 1:2 to 1:20, more preferably 1:2.3 to 1:19.The multilayer hose according to any one of claims 1 to 5, wherein the rubber solution contains at least one organic solvent, wherein the proportion of the at least one organic solvent is preferably 50 to 65 wt.%, more preferably 52.5 to 55 wt.%, based on the total weight of the rubber solution.The multilayer hose according to any one of claims 1 to 6, wherein the one or more elastomer layers of the outer layer are based on ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or a mixture thereof, and / or the one or more elastomer layers of the inner layer are based on ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM) or a mixture thereof.The multilayer hose according to any one of claims 2 to 7, wherein the one or more textile reinforcing layers are formed from rayon, polyvinyl alcohol, aramid, polyamide or a hybrid variant of said materials.The multilayer hose of any one of claims 1 to 8, wherein the hose is flexible.Multilayer hose according to one of Claims 1 to 9, obtainable by a process according to one of Claims 11 to 14.A method for manufacturing a multilayer hose, in particular a multilayer hose according to any one of claims 1 to 9, using a rubber solution comprising at least one solid rubber, at least one liquid rubber and at least one organic solvent, the method comprising the following steps: a) building an assembly comprising a1) two single- or multilayer rubber sheets for the inner layer and the outer layer, wherein before or during the building of the assembly the rubber solution is applied to one side of one or both sheets so that the applied rubber solution is arranged between the two sheets, or a2) two single- or multilayer rubber sheets for the inner layer and the outer layer and one or more textile reinforcing members arranged between the two rubber sheets, wherein prior to or during construction of the assembly, the rubber solution is applied to one side of one or both sheets and / or to at least one side of a textile reinforcing member such that the applied rubber solution is disposed between the two sheets, b) vulcanizing the assembly to form the multi-layer hose.The method of claim 11, wherein constructing the assembly comprises i) applying a reinforcing member to one of the single or multi-ply rubber sheets, ii) applying the rubber solution to the applied reinforcing member, iii) optionally applying a second reinforcing member to the reinforcing member provided with the rubber solution, iv) applying the second single or multi-ply rubber sheet to the reinforcing member provided with the rubber solution or to the applied second reinforcing member.The method according to claim 11 or 12, wherein the preparation of the liquid unvulcanized rubber solution comprises, according to alternative A: 1a), compounding the at least one solid rubber with the at least one liquid rubber to obtain a compound, 2a) adding at least one organic solvent to the obtained compound and mixing, preferably by means of a solution kneader to obtain the rubber solution, or according to alternative B 1a), adding at least one organic solvent to the at least one solid rubber and mixing, preferably by means of a solution kneader to obtain a rubber solution precursor, and 2a) adding the at least one liquid rubber to the rubber solution precursor to obtain the rubber solution.Use of a multilayer hose according to one of Claims 1 to 9 and 14 as a technical hose, in particular as a brake hose.