DE1816554A1 - Process for the production of shaped articles - Google Patents

Description

The invention relates to an improved method of manufacture treatment of molded objects.

Different © with contours provided molded article previously prepared © the characterized that materials amf doors with Eoa "· provided Farm surfaces werö applied @ n ₉ are removed after which the molded articles from the Porxa ,, Bsispieisweise blank Aich shaped Polst © r © ELEMENTS _s such as Manufacture seat cushions, bumpers and upholstery items for automobiles that have thermoplastic shells or skins that adhere to resilient cushions or cores. Poistsrelemenie of this kind are grounded, for example, by producing skins from a polymeric material on the contoured surface of a Porm and then applying a foamable polymeric material to the skins while this is still on the mold surface, and foaming the polymeric material underneath Formation of the upholstery = element made. Up to now, the removal of the upholstery elements with complicated contours produced by such a method from a porm has been difficult to the extent that there was a risk of a skin rope tearing or being destroyed.

The aim of the invention is therefore to create an improved one Process acid manufacture of molded articles.

It has been found ₉ that molded objects can be produced by a process which consists in molding a molded object on the exposed or inner surface of a flexible formula ₉ with the flexible molding element connected to a rigid support element _f a fluid pressure between ä @ m flexible FormeXezae t un? il the stiff Srägerelement create, i ^ m flexible

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element from the rigid support el smar.t zv. remove © ». _f waüiwoh between these two elements © ir. closed cavity is formed, and remove the molded article from the flexible i'ormelemant see below.

The erfindtmgsgemäss ersieibaren Tortoile emerge from closer ami oelgefügten drawings.

Figure 1 shows a perspective view of a section siner form with a flexible form element that with a rigid Support element is connected. 3) the flexible insert is attached to the inside of the rigid support element.

FIG. 2 shows a partial cross-sectional view of the fora with -th flexible Pormelement _s which is removed from the rigid element after auseen and forms a closed Holilrama the two elements. On the flexible molded em © at there is a cover made of a non-hardened liquid polymer.

Pigur 3 is a partial cross-sectional saasielite of the Porm, the flexible eormelsment inside against the rigid carrier element is arranged and a flexible polymeric overlay on · = knows

Figure 4 is a partial cross-sectional view of the figure and shows the flexible formula, that is outwardly from the rigid Srager.element is removed and a molded composite structure no wears, which consists of a flexible polymeric coating ,, de.? adhered to a foam pad.

Me figures aeigan © in flexible form element 1, bsbeispielsweiae a contoured silicone rubber or a contoured

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fourth polyurethane * the one with a stiff © ?! Angular © r @ X @ m @ at 2 of position 3 is connected. The stiff® carrier © r © l®m @: & t is provided with an opening 4 through which fiiiiädnjelr between the enclosed surfaces & © s flexible ». F © ra © l © ~ ments and the rigid support element can be created. "Should ^fi stiff! Dräger element one! Eräger be understood for the flexible Pormelement which ®ins size" re stiffness ale flexible SOrmelemsirfc has ,, The stiff Trägeralement may consist of various Materialisn Tbestehen ₉ "The term for example, metals ₉ plastics, HoXs »Hardened natural rubber or synthetic rubber-like polymeric material.! SK ₀ A fluid pressure is applied to the opening 4, vm. The flexible form element 1 τοη the stiff slanting angle 2 with the formation of a cavity zv / isohen d © n bite elessents back away. The IPluiddruclc can from. various fluids exerted vrerden, bsispielsVfeiee UNAE of inert gases Flüsßigkeiten ρ i ^ obei bsiapielsv / ice, air, nitrogen or water srwähnt "may be one _o. layer 6 fi of a flexible polymeric material such as cured polyurethane _s v / IICD on the exposed surface ®s flexible Pormelemeate then applied; that first of all at least one layer of a sprayable mixture, such as a liquid polyurethane reaction mixture, is sprayed onto the squeezed flexible Pormelement 1. 33er Fluiödruok in the middle of the range 5 is then down The flexible Fonaelome & t 1 in the direction of the etßif ©! 'rager element 2. The sprayed-on oil from the polyurethane reaction union is allowed to harden under a flexible, hardened polymeric polyurethane shell 6, which is applied to the .flexible molding element 1 .

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short time to be hardened "optionally wherein heat is allowed to act, usually within 1 hour or less, namely $ e according to the nature of the polyurethane reaction mixture and, depending on the Sateache whether a catalyst is used or not.

It is preferable that the flexible molded member 1 does not adheres tightly to the applied flexible polymer shell. Optionally, the flexible molded element 1 can be provided with a release agent coating in order to prevent the applied flexible polymer shell from sticking.

A liquid foamable material such as a Polyurethane reaction mixture is applied into the cavity on a rope of the surface of the hardened polymer shell 6. Its cover layer 7 and a mounting bracket 8 are placed over the mold, whereupon the foamable reaction mixture foam and come into contact with the surface of the Applied flexible polymer shell and the mounting bracket 8 expand and form a molded, hardened and flexible wedge-shaped polyurethane 9, which is attached to the Polymer shell and the mounting bracket adheres and thereby forms the Terbund structure, is allowed to harden. The foamable! Polyurethaxireaktionsmiechung is usually in relative in a short time, for example in about 20 minutes or less, foamed and cured. The fluid pressure in the cavity 5 is increased onBohliessend by the flexible form element 1 after auseen to remove from the rigid support element 2, whereupon the composite structure to which the mounting bracket is attached, is removed from the flexible Pormelement. The fastening saddle is used to facilitate fastening of the terbund structure to other structures.

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It should be pointed out that although the use of a sprayable liquid polyurethane mixture is described in the description of the drawings, other materials can also be applied in the practice of the invention, namely in applying a fluid polymeric material to the surface of the flexible mold iron especially on the inside of the flexible Pozmelement. For example, suspensions or solutions of thermoplastic thermosetting and rubber-like polymeric materials can be applied to the surfaces of the flexible molding element, whereupon the plastic materials and rubber-like materials are coagulated and dried. Furthermore, other materials can be applied by applying molten materials such as molten thermoplastic polymers, followed by cooling and solidifying the molten materials. It is preferable to apply poly urethane, since polyurethane real crumbs are easy to handle and react quickly. Even if it is preferable to apply the plastic materials and chewing sohuk-like materials by spraying on them, these materials can nevertheless also be applied by other suitable methods, for example by brushing on, dipping or pouring on. In addition, the known methods for cracking hollow bodies and the known rotary pressing processes are used in embossing.

If the method according to the invention for the production of a 7 » waist structure with a polymer skin on foam cushions adheres ι be used, then it is usually appropriate to a sufficient amount of the polymeric material to apply to the surface of the flexible shaped element to form a layer or to produce skin from the polymeric material to a thickness of about 25 to about 1250 η (1-50 mils).

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In practice, the flexible form element consists of different » flexible polymeric materials. Ss is preferable when such flexible polymeric materials are not close to the molded article adhere when it is formed on the surface of the flexible molding member. Representative examples of such flexible polymeric materials are flexible silicone rubbers, which are generally cured at room temperature * Other flexible materials can can also be used for the molding which usually requires releasing agents or lubricating films. Representative examples of the various flexible materials are flexible Polyurethanes, hardened grindable rubber silicone rubbers, hardened natural rubber and the various synthetic rubbers such as rubber-like polymers of conjugated dienes, such as 1, ^ - addition polymers of 1,3-butadiene and Isoprene, polychloroprene, the rubbery copolymers of butadiene and styrene which contain a predominant amount of butadiene, especially copolymers of butadiene and styrene hot and cold SBR type, 60 to about 90 weight ^ Contain butadiene, copolymers of butadiene and acrylonitrile, butyl rubber, which is the main amount of the polymerization product a monoolefin such as butylene with a minor amount of a multiolefin such as butadiene or isoprene, is copolymers of ethylene and propylene and terpolymers of ethylene, propylene and a smaller one Amount of non-conjugated diene. There are also flexible ones Polymers in question produced by ring-opening polymerization of unsaturated alicyclic compounds with 1 ~ 3 carbon-carbon double bonds in the alicyclic ring, such as for example, polyootenamers and polydodecenamers, can be obtained.

The flexible molded element can be used with various known separating

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be filled with medium. A "flexible lozmelemeni" is intended to mean "flexible" form elements with a release agent coating, if such a coating is two-dimensional. Representative examples of the various releasing agents for the surface of the flexible molding member are those agents which do not closely adhere to the molded article when it is formed on the flexible molding surface. Some of the many suitable! Eremnaittel are the polyethylene "ad polypropylene waxes and emulsions, Haturv / axis, synthetiselie waxes, Dimethylsilikonfluids, fats and higher polymers Sojfabohnenfettsäuretypen or vegetable cephalin and lecithin, soaps, fluorocarbons ₉ polyvinyl alcohol or fluorosilicones.

In addition to the polyurethane active mixtures and molten polymeric materials, various suspensions and solutions of material can be used to apply the polymeric materials to the surface of the flexible molding element. For example, suspensions come into question, the aue dispersions and emulsions of thermoplastic polymers, thermosetting polymers _e consist kautsohukartiger polymers or Copoiymerer and plasticized vinyl resins in the form of individual particles.

Representative examples of rubber-like polymers and copolymers are natural rubber and various synthetic rubbers, such as, for example, rubber-like polymers of conjugated dienes ₉ such as, for example, polychloroprene, the rubber-like copolymers of butadiene and styrene which contain a large amount of butadiene, in particular copolymers of butadiene and styrene hot and cold SBR-2 types containing about 60 to about 99 weight ^ butadiene, copolymers

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of butadiene and acrylonitrile, butyl rubber, which is a polymeric sation product of a larger amount of a monoolefin, such as butylene, with a smaller amount of a multiolefin, such as butadiene or isoprene, rubber-like polymers of isoprene, rubber-like polymers of 1,3-butadiene, rubber-like copolymers of ethylene and propylene, and rubber-like polymers of ethylene, propylene with a minor amount of a diene. Watery Emulsions of such rubbery polymers and copolymers are particularly suitable. She chews suspensions » Soho-like polymers and copolymers can be mixed with suitable Vulcanizing materials such as sulfur as well with vulcanization accelerators, so that they Bring can be hardened, be compounded.

Representative plasticized ^ Vinyl resins are plasticized Polyvinyl chloride and plasticized copolymers of vinyl chloride with other vinyl compounds, such as vinyl chloride / vinyl acetate copolymers, vinyl chloride / vinyl ether copolymers, Vinyl chloride »maleate or fumarate copolymers or vinyl chloride / vinylidene chloride copolymers. The vinyl resins in the form of single particles can be prepared using known plasticizers are plasticized, the plasticizers being applied to the surface and causing the Resin particles and heated to form a flexible layer.

Polyurethane reaction mixtures are useful in performing this of the invention in practice for the manufacture of the flexible molding, for the manufacture of various articles, the be molded on this molding element, and as foamable mixtures, if the method according to the invention is used for this purpose is used to manufacture upholstery items. Eb should be pointed out

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sen »that such polyurethanes, including sell-shaped Polyurethanes, either flexible or rigid, unless they are used to make the flexible molded element will,

The polyurethane reaction mixtures used according to the invention are mixtures of the materials that are usually used for the production of rigid or flexible polyurethanes and polyurethane foams by the known one-shot " prepolymer or semi-prepolymer methods *

In general, the polyurethane mixtures are mixed at least one reactive polymeric material containing hydrogen (determined by the Zesewitlnoff method) and at least one organic polyisocyanate produced. It should be pointed out that the device according to the invention is confc * Polyurethane seeds also have polyurea holes can.

The foamable polyurethane reaction mixture can contain water or various known inert expanding agents or blowing agents. It is usually convenient for the inert fluid expandants to be gaseous at room temperature. "Inert" is to be understood as meaning expanding agents which do not react in a disadvantageous manner with the reaction mixture. Representative examples of various blowing agents are air, nitrogen, carbon dioxide and halogenated hydrocarbons, for example methylene chloride, i ^! rich3, ormo2i, ofluoromethane ₉ di-

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chlorodifluoromethane and 1,2-dichlorotetrafraorethane. The foaming hair Polyurethane reaction mixture can also increase relatively small amounts of various "known catalysts" the speed of reaction contain »but it can contain various surfactants which control the cellular structure of the resulting foam.

For the production of the various polyurethane reactions » Hydrogen compounds are preferred as reactive hydrogen containing polymeric materials polyester polyols, polyether polyols, Polymers of conjugated diene hydrocarbons with dihydroxyl end groups or castor oil alone or as a mixture used. The reactive hydrogen-containing material generally employed has a molecular weight between about 700 and about 5000, and usually between about 1000 and about 4000. In general, are polyester polyols are the "preferred active hydrogen-containing materials when high strengths and solubility" medium-lasting should be aimed for.

If foamable polyurethane reaction mixtures are to be made to form rigid and flexible cellular polyurethanes, then polymeric, reactive hydrogen-containing compounds with relatively low molecular weights (hydroxyl numbers from about 350 to about 600) can be used to make rigid foams, while compounds with relatively high molecular weights (hydroxyl numbers from about 30 to about 120) can be used to make flexible foams. The dioirfee of the foam produced depends etviaa on the type and amount of the fluid expansion agent used.

Usually the ratio of the isoyanate groups of the poly-

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isocyanate, preferably an organic diisocyanate, to the reactive hydrogen-containing groups of the reactive hydrogen-containing polymeric material about 1 »1/1 to about 12/1, and preferably about 1.2 / 1 to about 2.5 / 1. These materials can be up to about "t 50 ⁰ C to form a polyurethane prepolymers are reacted at temperatures of about 20 ° 0. The reactive hydrogen atoms are provided by hydroxyl groups and amine groups. This Torpolymere a solution or dispersion can be dissolved or dispersed in the solvent to form , whereupon the solution or dispersion is then mixed with a catalyst, a chain extender and / or a crosslinking agent to form a polyurethane reaction mixture.

Agents which promote chain extension and crosslinking of the polymer are also suitable. This means are sometimes referred to as hardeners. They facilitate the implementation of the polyurethane reaction mixture for curing and gelation. Diamines, hydrocarbon oils, such as Ethylene glycol and propylene glycol, as well as hydroxylamines such as triisopropanolamine, are according to the invention used as such means. When these agents are used, they are usually used in a polyurethane prepolymer a ratio of about 0.5 / 1 to about 1.5 / 1 and preferably about 0.8 / 1 to about 1.0 / 1 amine = and / or Hydroxyl groups of the chain extender and crosslinking agent per isocyanate group in excess of the reactive hydrogen groups of the reactive hydrogen-containing polymeric M & terials added. Bifunctional materials such as for example glycols and diamines are generally ale Chain extenders and crosslinking agents are preferred. In space-

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In general, the bifunctional materials provide products that are easier to spray on. Other known methods for Preparation of polyurethane reaction mixtures with or without a solvent can also be used.

When used as a deforming material, with the exception of use as a foamable polyurethane reaction mixture, a solvent is usually added to the reaction mixture so that it is in the form of a fluid mixture or solution. In general, a solvent is added in an amount which is sufficient that a solution is formed which contains about 30 to about 65 f Peststoffe. However, a higher or lower concentration of pesticides can also be used. If the test substance concentration is low, then one application will deposit a thin layer of the polyurethane polymer, with a large amount of solvent having to be removed during the curing process. Sine ffeststöffkonsentration of 40 i "or above is generally desirable.

Various known non-reactive solvents can be used to prepare the prepolymer solutions and polyurethane reaction mixtures. Representative examples for solvents are aromatic · solvents such as benzene, xylene and toluene, as well as the liquid lower ketone · »such as acetone, methyl ethyl ketone, Methyl isobutyl ketone or diisobutyl ketone. If the polyurethane reaction mixtures are to be used for the production of the cured polyurethanes in limited areas where there is a risk of explosion, then non-flammable Solvents can be used to form non-flammable polyurethane reaction mixtures. Solvent oil mixtures can also be used to achieve satisfactory results

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Propagation properties and evaporation rates used are »if the polyurethane spray preparation on a polymeric surface is applied.

If necessary, pigments, surface-active agents »leveling agents» such as cellulose acetate butyrate, as well as other known additives of the solution or dispersion of the polyurethane reaction mixture can be added. If a pigment is added, this is done in an amount of approximately 0.5-10 parts and preferably about 1-2 parts of the Pigment per 100 ropes of prepolymer on a weight basis. Has a submicroscopic fumed silica proved to be an effective thixotropic agent. This material is produced by the vapor phase hydrolysis of silicon tetrahydrofuran. One such silica sold under the trademark CAB-O-SIL from Godfrey Xi. Cabot, Inc. » in the trade is brought, is suitable as a thixotropic agent for use in spray-on polyurethane formulations, if it is used in an amount of about 0.1-10 parts by weight per 100 parts of the prepolymer in the solution. The preferred one Amount is about 0.5 to about 4 parts by weight. This range of amounts of fumed silica results in improved thixotropic properties of the resulting spray-ons Preparation.

The following examples illustrate the invention without restricting it. In these examples, the parts and percentages are, unless indicated otherwise, by weight _o

Examples 1 and 2

Two shapes are made, with each shape having a contour rated flexible form element and a rigid bearing element having. The shapes are as shown in FIGS. 1 and 4.

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te general form. The inner diameter of the flexible molding element is approximately 82 mm (3 1/4 inches) and the sieves about 50 mm (2 inches). The stiff girder element is made made of wood and is spared an opening at its bottom, the opening being approximately 6 mm (1/4 in.) in diameter inch). One shape has a contoured concave pliable Silicone rubber molding, while the other> form a contoured concave flexible polyarethane molding which is connected to the wooden rigid beam element. The polyurethane element has a release agent coating from a soybean fatty acid.

Composite structures with flexible polyurethane shells attached to flexible Cellular polyurethane pads are adhered using each of the molds according to the method given below manufactured:

Air pressure is measured through the opening at the bottom of the rigid support » elements created around the flexible form element to the outside move away from the rigid support member, in this position becomes a layer of a liquid polyurethane reaction mixture applied by spraying onto the surface of the removed flexible molding.

The air pressure is then reduced, whereupon a vacuum or a negative pressure is applied to the enclosed cavity between the flexible molded element and the rigid support. The flexible molded element is moved inward in the direction of the rigid carrier. By "reduced pressure" and negative prints are to be understood, the polyurethane layer is cured anschlieseend Hinuten about 15 at a temperature of about 60 ⁰ Q to form a flexible polyurethane shell on the surface of the flexible Formelenents.

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Its foamable polyurethane reaction mixture is applied to part of the surface of the cured polyurethane shell, followed by the application of a topcoat over the Form is made. This cover layer carries a mounting bracket that is easily connected to it. The foamable polyurethane reaction mixture is allowed to expand to to fill the mold cavity. It then becomes approximately Cured for 10 minutes at about 25 ° ö and adhered to the flexible polyurethane foam as well as on the mounting bracket.

The cover sheet is removed from the mold, leaving the mounting bracket on the cured foam "Polyurethane sticks. Then air pressure is applied through the opening applied in the rigid carrier, whereby the silicone chewing mold to the outside of the carrier in the one shown in Figure 4 Wandering away the composite structure, which consists of a polyurethane skin, which is connected to the sole pad, with the fastening bracket adhering to it, removed from the mold.

The flexible silicone rubber mold used in this example is made by pouring a liquid, room temperature vulcanizing silicone rubber over the surface of a molded, leather-grained substrate. Other silicone rubbers that vulcanize at room temperature and grindable silicone rubbers can also be used (cf. German patent specification (patent application P 18 02 063.8 corresponding to US application Serial No. 673 964 of October 9, 1967)). The Sillkonkautsohuk is ^{hardened at about 25 0} O for 8 hours and can be easily removed from the leather-grained substrate to form a flexible, self-releasing silicone rubber.

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schukformelements having a surface which is a negative reproduction of the ledernarbigen surface of the substrate, removing * The molds of silicone rubber ansohliessend ungefänr 3 days at a temperature of about 82 ⁰ C and ungefänr 8 hours at a temperature of ungefänr 121 ° C ( 25O ^e F) semi-hardened. The liquid room temperature curing silicone rubber used to make the flexible molds is made by mixing components A and B of RTV 588 (manufactured by the Dow Corning Company) immediately prior to making the silicone rubber mold. Component A consists of a mixture of a prepolymer, a chain extender, stabilizers, oils and fillers. The prepolymer is a silanol-terminated polyorganosiloxane while the chain extender is a polyalkoxy-substituted polyorganosiloxane. Component B consists of a dibutylssin dilaurate catalyst ^ fillers and oils.

The contoured shape flexible member of the flexible cured polyurethane is prepared from a prepolymer of a PoIybutadienpolyol having a molecular weight of ungefänr 3000 and a hydroxyl number of about 40 and 4,4-methylenebis ⁱ ° (oyolohexylisocyanat), a Kohlenwasserstoffdiolhärtungsmittel and a small amount of a catalyst for accelerating the hardening reaction produced.

The polyurethane reaction mixture used to form the flexible polyurethane shell on the flexible molding of this example is prepared by mixing a polyurethane prepolymer solution with a diamine solution. The polyurethane prepolymers is at ungefänr 150 ⁰ C of a mixture

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1 ρ 4-Batandi © ladip & ten rait an average molecular weight you about 1500 and an average hydroxyl range of about 84 and 4 * 4 ^? ~ Msyclofee £ y3m3thandi = isoey & nat made wnä. Existing Ia one em to the © i chlorinated hydrocarbon Iiösirngsiaittel that ®i & @ small Meng © @ @ e ia far "bpign © ats includes _t solved.

Immediately ¥ © r & © s? According to the EOanswbstrat, the folyurethane rose pol ^ ose is mixed with a hardening solution, ii © ®mb © in © ® © ^ gaaii ©! I © s Bi © Min lind leetoa

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as well as upholstery », for automobiles, which have thermoplastic layers, covers or skins that are attached to resilient pubic« » upholstery cling, Bas process is also suitable for manufacturing of solid shaped objects that are rigid, flexible or chewy skin.

The invention can be carried out in such a way that the exposed surface of the flexible fox shrimp in its extended position is coated with a liquid polymeric material in order to facilitate effective coating of difficult areas of the flexible mold surface, whereupon the flexible ear element inwards onto the rigid support element is moved under a generally concave shape, and the liquid polymeric material is then cooled, allowed to flow, dried or hardened . Even if the polymeric hat "Hn" in the surface of a flexible molded element is at £ ^% * η V, which generally has a concave outer film, the flexible one is nonetheless l'ow "\" η ^ liom on such a design bescarSB '-' cu in "" l.oiienfc can generally a flat or convex O at ¹ '> i ^first

Oefoxmte Segn "+ i] tyf« _f of concave flexible molds by applying imglciclioi Jiui ^ ok © and forces aa the FoxiBoberflaolie be removed, for example by a mechanical SAEA & i "puliörung to the flexible Sorrn NaOH outside move su and the flexible form NAOB If they appear, they are generally unnecessarily destroyed, whereby a similar sefalir is also used for the flexible IT element. The method according to the invention can therefore be used with particular advantage

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zwieeliea & er flexible ». Shape with the stiff support element is laid out uniformly over the surrounding surface of the fiexiDle Pormelemeat _? around the flexible S ⁵ O ^ melement from the stiff üüräger sur l & tfemimg eises gesciüisolsenea ßeg © nstsnd @ s from the form au

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Claims (10)

Claims szxzssizsxttexBXsxsausta 1. A method of making shaped articles, characterized in that a shaped article is formed on the exposed surface of a flexible molding element, wherein the flexible form element with a rigid support element is connected, a fluid pressure between the flexible mold member and the rigid support member for removal from the flexible mold element is applied by the rigid support element, creating an enclosed cavity between the two Elements is generated, and the molded article is removed from the flexible mold element. 2. The method according to claim 1, characterized in that a polymeric material is applied to the exposed surface of a generally concave flexible mold element, wherein the flexible molded element is provided with a rigid support element connected and arranged inwardly against this carrier element, a fluid pressure between the flexible mold element and the rigid support element for removing the flexible form elements is applied to the outside of the rigid support element, creating an enclosed cavity between the two elements is formed and the molded article is removed from the flexible formula again. 3. The method according to claim 2, characterized in that the polymeric material applied to the flexible molded element a hardened polyurethane is, while the flexible one Molding element composed of a silicone rubber. 4. The method according to claim 3, characterized in that the cured polyurethane on the flexible molded element da » 9098 30/1344. " _Rivfrl by, that is applied a coating of a liquid Polyurethane reaction mixture is applied to the surface of the flexible molding element and the polyurethane reaction mixture is hardened. 5. The method according to claim 4, characterized in that the polyurethane reaction mixture of at least one reactive hydrogen-containing polymeric material, which consists of at least one compound which has a molecular weight between about 700 and about 5000, where polyester polyols, polyether polyols, polymers conjugated " ter diene hydrocarbons with dihydroxyl end groups or Eisinusöl come in coinage, an organic diisocyanate and a hardening agent consisting of diamines, hydrocarbon diols or hydroxylamines. 6. The method according to claim 1, characterized in that for producing a composite structure with a flexible polymer layer on their lussenseitSj, which on a foamed polyffizren upholstery adheres, a) at least one layer of a liquid polymeric material on d @ r © s: p © & i © rt <tn via @ T £ läoh® @ in @ s flexible Forai- © l © ® @ Et © applied vtT & _f where dss il @ 3d.bl ©! © nselemeiit ä with © iaeM stiff © a i2? Äg © s? @ L @: ü? EzLt im.t®s Bildinig one dea. ist iss, i sldh τοπ äem stiff »fs" äg®ral @ a © at @mtferaea lets ₉ vmß. w © b © l äl @ © poses © © ^ © ^ fläcli © dee flexible Ss% ®s? © X © a @ ati3 di @ ligeEsgMft "besltst, daee si © not i £ @ ht © s ä®% flQslbiea pelpieiesiü, Sehisht adheres ^ i> © itaii £ @ jet © s 1ΊΜϋ. € ΒΒ®2ε a®, äea Eoiilss'aum swisc-yeast den © !, © E-flaea © ^ i, @ © fX © 52lM @ a f © ^ a © l © m®at © "Pjj.fi des stei fos feält Bfi flil ils SieSitisag iraaf that ©% © ££ © c) a flexible polymeric layer is formed from the liquid polymeric material on the surface of the flexible formula element, d) a foamable polymer mixture on the surface of the Layer of the flexible polymer material applied and forming the foamable polymeric material the composite structure is foamed, e) a fluid pressure on the cavity between the flexible lOro ~ element and the rigid support element is applied to the flexible Pormelement outwards from the rigid carrier ». element to remove, and f) removing the composite structure from the flexible molded element will. 7. The method according to claim 1, characterized in that »that for the production of a Terbund structure with a flexible Poljnrethansehicht on its outside, which adheres to a resilient, foamed polyurethane pad, a) at least one layer of a liquid polyurethane reaction emisslmng is applied to the exposed surface of a flexible "FQXJMsIamutet, the loraelestent with a stiff carrier element to form an enclosed hollow space between the two elements and can be removed from the rigid carrier element » Ώβ & whereby the exposed surface of the flexible SOrmelement has the property that it does not mämftetj in the foljiixelihan reaction mixture during lärtanj b) a reduced fluid pressure is applied to the cavity in order to the flexible Sonaelraent towards the rigid c) the Polyttretliaiireaktionsmischimg to form a lea hardened PolyiirethansoSilclit is hardened, d) a fringed polyurethane realctlonsmiochung on the surface the flexible cured polyurethane layer is applied and the foamable polyurethane reaction mixture foamed and hardened to form the composite structure will, e) a fluid pressure in the cavity to the inner surface of the flexible Fcrmelementa is applied to the flexible Fonaelement to remove outwardly from the rigid support element, and f) removing the composite structure from the flexible molded element will. 8. The method according to claim?, Characterized in that the Layer of the liquid polyurethane reaction mixture through Spraying is applied. 9. The method according to claim 7, characterized in that the flexible formula menu; consists of a silicone rubber. 10. The method according to claim 7 »characterized in that the Fluid pressure is applied by an inert gas. BAD ORiOlNAL 0/134 / - Blank page