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EP4263187A1 - Manchon de découplage à base d'un élastomère autonivelant - Google Patents

Manchon de découplage à base d'un élastomère autonivelant

Info

Publication number
EP4263187A1
EP4263187A1 EP21843589.9A EP21843589A EP4263187A1 EP 4263187 A1 EP4263187 A1 EP 4263187A1 EP 21843589 A EP21843589 A EP 21843589A EP 4263187 A1 EP4263187 A1 EP 4263187A1
Authority
EP
European Patent Office
Prior art keywords
polyurethane elastomer
bushing
bearing according
bearing
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21843589.9A
Other languages
German (de)
English (en)
Inventor
Maximilian Maier
Johannes Poppenberg
Andreas Horstmann
Ann-Christin COLLMOOR
Marc Ingelmann
Ulrich Holwitt
Sabrina ENGEL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Polyurethanes GmbH
Original Assignee
BASF Polyurethanes GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF Polyurethanes GmbH filed Critical BASF Polyurethanes GmbH
Publication of EP4263187A1 publication Critical patent/EP4263187A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3835—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by the sleeve of elastic material, e.g. having indentations or made of materials of different hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/04—Bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/721—Vibration dampening equipment, e.g. shock absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/025—Elastomers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/06—Stiffness

Definitions

  • the subject matter of the present patent application is a bearing that is used for vibration damping or vibration decoupling.
  • DE 102 25 797 A1 discloses DE 102 25 797 A1 discloses a round bearing with a bearing element based on cellular polyisocyanate polyaddition products, in which the adhesion between the bearing element and the inner bushing takes place with thermoplastic polyurethane.
  • bearings for the aftermarket made of compact polyurethane which have the goal of a sportier tuning of the vehicle and a long service life due to a high material hardness and thus a high bushing rigidity, but no longer meet the original requirements for vibration damping or decoupling.
  • the present invention was therefore based on the task of developing a mount for vibration damping or vibration decoupling, which can also meet the increased requirements of the vibrations generated by electric motors up to a high frequency range and at the same time meet driving dynamics requirements.
  • a further object of this invention is the production of such a bearing according to claim 14 and the use of a polyurethane elastomer preparation (v) for the production of the bearing according to the invention.
  • Figure 1 shows a preferred embodiment of a bearing (i) having an outer sleeve (ii) surrounding a cavity (iii) and a fastener (iv) located in this cavity
  • the compact polyurethane elastomer composition (v) is introduced into the cavity (iii) which in the finished bearing connects the outer bushing (ii) to the fastening element (iv) (see also the following figures 2 and 3).
  • FIG. 2 shows a preferred embodiment of a bearing (i), in FIG. 2a) in an oblique top view, in FIG. 2b in top view, and in FIG. 2c in a side view.
  • the bearing (i) has an outer sleeve (ii) surrounding a cavity (iii) and a fastener (iv) located in this cavity (iii). Also in the cavity (iii) is the compact polyurethane elastomer composition (v) containing the outer bushing (ii) with the fastener
  • FIG. 3 shows a preferred embodiment of a bearing (i), in FIG. 3a) in an oblique top view, in FIG. 3b) in a top view, and in FIG. 3c) in a side view.
  • the bearing (i) has an outer sleeve (ii) surrounding a cavity (iii) and a fastener (iv) located in this cavity (iii).
  • Also in the cavity (iii) is the compact polyurethane elastomeric formulation (v) connecting the outer bushing (ii) to the fastener (iv), the polyurethane elastomeric formulation (v) containing two through recesses (vi) and two partially through recesses (vii). .
  • FIG. 4 shows an arrangement for testing the bearing (i), which is pressed into a bearing mount (viii) which is connected to a testing machine (x) via the holder (ix).
  • a force F acts on the fastening element (iv) of the bearing via the test device (xi).
  • FIG. 4a shows a force acting on the bearing in the radial direction, and in FIG. 4b) in the axial direction.
  • FIG. 5 shows the force-displacement curves and the stiffness-displacement curves of a bearing according to FIG. 2 and recipe 6 with the quasi-static load according to example 2a.
  • the force F is plotted on the left vertical axis with the unit [kN], the stiffness Cs with the unit [kN/mm] on the right vertical axis and the displacement s with the unit [mm] on the horizontal axis, each in the axis directions of the bearing, x-axis ( Figure 5a), y-axis ( Figure 5b) and z-axis ( Figure 5c).
  • the bearing stiffness Cs is calculated from the local slope of the force-displacement curve.
  • FIG. 6 shows the course of the bearing stiffness Cd and the bearing damping D over the frequency of the applied vibration f with a dynamic load on a bearing of a bearing according to FIG. 2 and recipe 6 under a defined initial load.
  • the bearing stiffness Cd is plotted with the unit [kN/mm] on the left vertical axis, the bearing damping D with the unit [°] on the right vertical axis and the frequency f with the unit [Hz] on the horizontal axis.
  • Figure 6a shows the bearing stiffness and bearing damping in the x-axis direction under the preload OkN
  • Figure 6b shows the bearing stiffness and bearing damping in the y-axis direction under the preload OkN
  • Figure 6c shows the bearing stiffness and bearing damping in the z-axis direction under the preload of 1 kN.
  • the bearing stiffness c d is calculated from the slope of the force-displacement curve for a sinusoidal excitation with an excitation amplitude of 0.1 mm.
  • the bearing damping D is represented as a loss angle, which indicates the phase shift of the output signal (force amplitude) compared to the input signal (displacement amplitude) with a sinusoidal excitation with an excitation amplitude of 0.1mm.
  • the frequency f represents the number of sinusoidal excitations per second.
  • An object of the invention in an embodiment 1 is a bearing for vibration decoupling (i) comprising a bushing (ii) surrounding a cavity (iii) and a fastener (iv) located in this cavity (iii) wherein in the cavity is a compact polyurethane elastomer composition (v) which connects the outer bush (ii) to the fastener (iv), characterized in that
  • Polyurethane elastomer (v) in the formulation is the reaction product of the following structural components a. a diisocyanate b. a polyester diol, a polyether diol, or a mixture thereof c. a chain extender and the preparation optionally contains at least one of the following components d. catalyst e. excipient, and/or f. additive
  • the compact polyurethane elastomer preparation (v) preferably has a density between 0.8 g/l and 1.5 g/l, preferably between 0.9 g/l and 1.4 g/l and in particular between 1 g/l and 1. 3g/L.
  • the surface of the bushing (ii) or the surface of the fastener (iv) bonded to the polyurethane elastomer composition, or both surfaces is surface treated. This improves the adhesion of the polyurethane elastomer preparation (v) to the respective surface.
  • the surfaces are preferably swollen, pickled, ground, blasted, treated with electromagnetic radiation, with a plasma, or with a combination of these methods. Blasting is preferred, with the surface preferably being blasted with a hard medium, preferably corundum or steel shot.
  • the surfaces are preferably additionally or alternatively treated with electromagnetic radiation.
  • a preferred supplementary or alternative surface treatment is treatment with a plasma, preferably a low-pressure or atmospheric plasma.
  • Organic coating precursor compounds can preferably be fed into the plasma and then deposited as a plasma-polymeric layer.
  • Corresponding methods are known and described (e.g. DE 10 2017 201 559 A1).
  • the surface treatment is preferably also carried out by an oxidizing treatment, for example by flame treatment or gas-phase fluorination.
  • the surface treatment is preferably carried out by roughening via blasting with hard media or by building up a defined conversion layer, e.g. a trication zinc phosphating according to WO 2019/215 119.
  • a preferred embodiment 3 incorporating all features of any of the preceding embodiments or one of their preferred embodiments, is the surface of the bushing (ii) or the surface of the fastener (iv) bonded to the polyurethane elastomer composition (v), or both surfaces with a Adhesion promoter provided.
  • the adhesion promoter improves the connection between the polyurethane elastomer preparation (v) and the corresponding surface.
  • An adhesion promoter tailored to the corresponding polyurethane elastomer preparation (v) is preferably used.
  • the substrate surfaces must be clean, preferably have an enlarged surface, and more preferably be sufficiently reactive, which is why a surface treatment as described above is preferably carried out before the adhesion promoter is applied.
  • Carboxy groups or OH groups are preferably required for the reaction with adhesion promoters. OH groups can be found on practically all base metals because they form an oxide layer in the atmosphere.
  • Particularly good adhesion bases can be produced by prior coating with silicon dioxide, preferably by physical vapor deposition (PVD), chemical vapor deposition (CVD) or flame coating. The latter can also be used with plastics.
  • Preferred adhesion promoters for plastics are modified polyolefins.
  • a polyolefin is preferably modified in such a way that the previously insoluble polyolefin is soluble in organic solvents.
  • Chlorine, acrylic acid derivatives or maleic anhydride are preferably used for the modification. With chlorine, so-called chlorinated polyolefins (CPO) are formed.
  • Silane coupling agents are preferably used on metal surfaces.
  • a silicon dioxide layer is applied to the metal surface.
  • the silane adhesion promoters used can also react directly with the chemical groups on the surface, with the condensation reaction then taking place with elimination of the alcohol or HCl.
  • the organic group of the silane allows attachment to the polyurethane elastomer.
  • Adhesion promoters of the general form R—SiX3 are preferably applied to this silicon dioxide layer.
  • R is preferably an organically functionalized radical and X is a hydrolyzable group, preferably an alkoxy group or --Cl, the alkoxy group being particularly preferred.
  • X is a hydrolyzable group, preferably an alkoxy group or --Cl, the alkoxy group being particularly preferred.
  • the organic group R preferably consists of a spacer and a functional group.
  • the spacer is preferably an alkyl radical, which more preferably contains between 2 and 6 carbon atoms, more preferably is unbranched.
  • the spacer is particularly preferably a propyl chain.
  • Preferred functional groups are vinyl, methacrylic acid, epoxy, amino, urea or thiol groups, particularly preferred are amino, urea or thiol groups.
  • adhesion promoters are reactive or non-reactive mixtures of organic solvents and organic monomers, oligomers, or polymers.
  • the adhesion promoters are based on phenolic resins. Solvents in which the phenolic resins are preferably dissolved are selected from the group of butanone, toluene, xylene, 2-methoxy-1-methylethyl acetate, ethyl-3-ethoxypropinate, or are mixtures thereof
  • the adhesion promoter is present in a 5 ⁇ m to 50 ⁇ m thick layer between the polyurethane elastomer preparation (v) and the corresponding surface, the layer being preferred 10 pm to 30 pm thick.
  • the adhesion promoter has a free surface energy according to drop shape analysis of more than 35 mN/m, with polar components of less than 15 mN/m, particularly preferred the polar components are less than 5 mN/m. The determination is carried out according to DIN 55660-2 from December 2011.
  • the adhesion promoter is a polymer whose glass transition temperature (DSC) is below 100°C, more preferably below 60°C.
  • the adhesion promoter is a cationic dip paint (KTL), which is also referred to as a cathodic dip paint.
  • KTL cationic dip paint
  • a preferred dip coating is described in WO 2019/215119, for example. Details of this description form part of this disclosure.
  • the bearing consists of at least three essential elements, an external bushing (ii), which spans a cavity (iii) in which the fastening element (iv) is located.
  • the fastener (iv) is bonded to the outer bushing (ii) via the polyurethane elastomer composition (v).
  • the design of the warehouse is adapted to the specific structural conditions and requirements of the warehouse.
  • Some bearings are preferably axisymmetric to the axis of the fastening element (iv), other preferred bearings do not have an axisymmetric structure.
  • the non-axisymmetric structure has the advantage that different decoupling properties and damping properties can be realized in the bearing in different spatial directions. Individual preferred embodiments of the bearing design can be found in the figures.
  • the polyurethane elastomer preparation (v) must be designed in such a way that on the one hand it bears the load of the bearing and at the same time also makes a significant contribution to vibration decoupling, in some embodiments also to vibration damping by the bearing.
  • the bearing according to one of the previous embodiments or one of its preferred embodiments is preferably intended for the storage of units that cause vibrations, in particular the units are electric motors.
  • the units are connected to the bearing directly or via a frame.
  • the frame is preferably an auxiliary frame.
  • a subframe is a frame that is used to hold the unit, preferably the electric motor.
  • the subframe and unit can in turn be part of a larger device. This subframe is more preferably part of a vehicle, in particular a vehicle powered by an electric motor, in particular a car.
  • the vibration decoupling or vibration damping is determined on the one hand by the composition of the ingredients of the polyurethane elastomer preparation (v) and on the other hand by its spatial configuration.
  • the strength of the polyurethane preparation (v) varies in strength in different spatial axes between the outer bushing (ii) and the fastening element (iv).
  • different decoupling properties or damping properties are achieved by different ingredients of the polyurethane elastomer preparation (v).
  • parts of the cavity (iii) are not filled with the polyurethane elastomer preparation (v).
  • these continuous cutouts (vi) or partially continuous cutouts (vii) are completely or partially filled with other damping or decoupling materials.
  • a preferred such material is microcellular polyurethane (Cellasto®). It has been described many times and is tailored to the special decoupling and damping requirements within the bearing. Preferred embodiments are set out in the text.
  • Preferred bearings include either one of these configurations or combinations of two or more of these configurations.
  • the polyurethane elastomer preparation (v), possibly also others for damping, is in the cavity materials are dimensioned in such a way that they can move freely when used as intended, in order to be able to fully develop their vibration-decoupling or vibration-damping properties. In other words, they are dimensioned in such a way that they do not come into contact with any other component apart from the outer bushing (ii) and the fastening element (iv).
  • the polyurethane elastomer preparation (v) contains voids.
  • the polyurethane elastomer preparation (v) contains two or more continuous or partially continuous recesses parallel to at least one of these axes different cross section.
  • two recesses in the polyurethane elastomer preparation (v) preferably lie opposite one another axially symmetrically with respect to the fastening element (iv). This has the advantage, among other things, that they can be manufactured more easily.
  • Other preferred bearings do not have an axisymmetric structure.
  • the non-axisymmetric design has the advantage that different decoupling properties and damping properties can be realized in the bearing in different spatial directions.
  • At least one of the recesses at least partly contains microcellular polyurethane.
  • a region of the cavity (iii) spanning between the bushing (ii) and the fastening element (iv) is in the direction of the z-axis above or below, or above and below the polyurethane elastomer preparation (v) completely or partially filled with microcellular polyurethane.
  • the outer geometry of the bushing (ii), ie the side facing away from the polyurethane elastomer preparation (v), is designed in such a way that it can be easily manufactured and at the same time can be easily inserted into the intended installation space.
  • the outer contour of the outer sleeve is therefore a cylinder.
  • the socket on one side has a collar that runs around or partially around the y-axis. This collar makes it possible to limit the penetration depth of the bearing into the bearing seat, also known as the installation space.
  • the bushing (ii) is preferably shaped on the outside in such a way that it can be introduced into the installation space with a form fit.
  • a preferred type of form fit is a thread.
  • Another preferred type of form fit is an undercut via latching lugs.
  • the bushing is oversized relative to the installation space, so that it can be pressed into the installation space for a tight fit.
  • the contour of the inside of the bushing (ii), ie the surface of the bushing (ii) facing the polyurethane elastomer preparation (v) and at least partially in contact with it, is optimized on the one hand for manufacturing reasons.
  • the surface is preferably designed in such a way that good contact is possible at least with the polyurethane elastomer preparation (v), optionally also with other decoupling materials, preferably microcellular polyurethane.
  • the surface is preferably designed in such a way that, in conjunction with the polyurethane elastomer preparation (v), good vibration decoupling, possibly also vibration damping, is achieved with high load capacity.
  • the inside of the sleeve is at least partially the surface of a cylinder or at least partially that of an ellipse. Other exemplary and preferred embodiments can be found in the figures.
  • the bushing (ii) consists of a metal or a plastic.
  • the metal is preferably aluminum or an aluminum alloy.
  • the bushing (ii) preferably consists of a plastic.
  • the plastic is preferably reinforced with glass fiber.
  • the glass fiber content is preferably 10% by weight to 70% by weight, based on the plastic, preferably between 15% by weight and 50% by weight, more preferably between 20% by weight and 40% by weight , more preferably between 25% and 35% by weight and most preferably at 30% by weight.
  • the plastic is preferably a polyamide, particularly preferably a [6,6]-polyamide.
  • the fastening element (iv), which is located in the cavity (iii) of the bearing, is designed in such a way that it is itself designed as a fastening means or enables the bearing to be fastened using conventional fastening means.
  • the contour of the outside of the fastening element (iv), ie the surface of the fastening element (iv) facing the polyurethane elastomer preparation (v) and at least partially in contact with it, is preferably optimized on the one hand for production reasons, on the other hand the surface is preferably designed in such a way that good contact is achieved at least with the polyurethane preparation (v), optionally further decoupling materials possible is. Furthermore, the surface is preferably designed in such a way that, in conjunction with the elastomer preparation (v), good vibration decoupling, possibly also vibration damping, is achieved with a high load capacity.
  • the outside of the fastening element (iv) is at least partly the surface of a cylinder or at least partly that of an ellipse.
  • the fastening element (iv) or the bushing (ii) or the fastening element (iv) and the bushing (ii) is coaxial.
  • the arrangement of the bush (ii) and the fastener (iv) are coaxial with each other also in the bearing only in some embodiments.
  • the axes are not congruent in order to allow non-uniform thicknesses of the polyurethane elastomer preparation (v) in the different spatial directions.
  • the fastening element (iv) is internally hollow.
  • the internal contour of the fastening element (iv), which is hollow on the inside, i.e. the side facing away from the polyurethane elastomer preparation (v), is designed in such a way that it can be easily manufactured and at the same time can be easily fastened in the intended installation space using the usual fastening means.
  • the fastening element consists of a metal, preferably aluminum or an aluminum alloy. More preferably, the metal is at least partially, preferably entirely, encased in a plastic.
  • the plastic is preferably glass fiber reinforced.
  • the plastic is more preferably polyamide, in particular glass fiber reinforced polyamide, preferably as described above for the socket.
  • the inner contour of the fastening element is a cylinder.
  • the fastening element (iv) is preferably shaped on the inside in such a way that it can be fastened in a form-fitting manner, preferably by means of a thread.
  • the fastening element (iv) is internally shaped in such a way that conventional fastening means, such as screws or threaded bolts, can be passed through. In this way, the fastening element can be screwed to the installation space via the fastening element.
  • the inner opening of the fastener has an undersize compared to the fastener, so that it can be pressed in with the latter for a tight fit on the fastener.
  • FIGS. 1-10 Two preferred embodiments of a bearing according to the invention are shown in FIGS.
  • composition of the polyurethane elastomer preparation (v), which is located in the cavity between the outer bushing (II) and the fastening element (iv) and at least partially fills it, is adapted to the specific requirements of the bearing, such as hardness and damping. Together with the specific contouring of the polyurethane elastomer preparation (v), this allows the static and dynamic flexibility of the bearing to be adjusted in the various spatial directions.
  • the components (a) isocyanate, (b) isocyanate-reactive compounds and (c) chain extenders are also addressed individually or together as structural components.
  • the structural components including the catalyst and/or the customary auxiliaries and/or additives are also referred to as starting materials.
  • the polyester diol and the polyether diol in the polyurethane elastomer composition (v) is linear. More preferably, the monomers that form the polyester diol or the polyether diol comprise between 4 and 20 carbon atoms, more preferably 4 to 10 carbon atoms, more preferably 4 to 7 carbon atoms. The monomers are also preferably linear.
  • the polyether diol is particularly preferably polytetrahydrofuran (PTHF) and the polyester diol is polycaprolactone.
  • the number average molecular weight of the polyester diol and the polyether diol is between 0.5 x 10 3 g/mol and 5 x 10 3 g/mol, preferably between 0.8 x 10 3 g/mole and 3 x 10 3 g/mole.
  • the structural components are diisocyanate, polytetrahydrofuran, preferably according to the preferences mentioned above, and chain extenders.
  • the polytetrahydrofuran (PTHF) is more preferably a mixture of two polytetrahydrofurans PTHF 1 and PTHF 2.
  • the number-average molecular weight of PTHF 1 is preferably between 0.5 ⁇ 10 3 g/mol and 1.5 ⁇ 10 3 g/mol, particularly preferably 1 ⁇ 10 3 g/mol and at the same time the number-average molecular weight of PTHF 2 is between 1.5 ⁇ 10 3 g/mol and 2.5 ⁇ 10 3 g/mol, particularly preferably 2 ⁇ 10 3 g/mol . More preferably, the weight ratio of PTHF 1 to PTHF 2 is between 1:100 and 100:1, preferably between 20:80 and 80:20, more preferably between 40:60 and 60:40, more preferably between 45:55 and 55 45, and most preferably 50/50.
  • any isocyanate can be used for the bearing according to the invention, but preference is given to organic isocyanates, more preferably aromatic isocyanates and in particular diisocyanates. Among other things, the latter are easier to process.
  • the diisocyanate is an aromatic diisocyanate, more preferably selected from the group 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate (MDI), 1,5-naphthylene diisocyanate (NDI), 2,4- and/or 2,6-toluylene diisocyanate (TDI), 2,4-tetramethylenexylene diisocyanate (TMXDI), 3,3'-dimethyldiphenyl diisocyanate, 1 ,2-diphenylethane diisocyanate, and p-phenylene diisocyanate (PPDI), or a mixture thereof.
  • MDI 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate
  • NDI 1,5-naphthylene diisocyanate
  • TDI 2,4- and/or 2,6-toluylene diisocyanate
  • the isocyanate is 1,5-naphthylene diisocyanate (NDI) or 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate (MDI), or a mixture thereof.
  • NDI 1,5-naphthylene diisocyanate
  • MDI 4,4'-diphenylmethane diisocyanate
  • the diisocyanate is 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate (MDI).
  • the isocyanates are preferably used in the form of the pure compound, in mixtures and/or in modified form.
  • Preferred modifications, which are preferably used in addition to the isocyanate used, are uretdiones, isocyanurates, allophanates or biurets or mixtures thereof.
  • the diisocyanate is preferably also used in a mixture with its derivatives.
  • the preferred diphenylmethane diisocyanate (MDI) particularly preferably contains up to 10% by weight, more particularly preferably up to 5% by weight, of carbodiimide-, uretdione-, allophanate- or uretonimine-modified diphenylmethane diisocyanate, in particular carbodiimide-modified diphenylmethane diisocyanate.
  • MDI diphenylmethane diisocyanate
  • preference is given to using only difunctional isocyanates.
  • the proportion of 2,4′-MDI and 4,4′-MDI in the isocyanate is preferably greater than 60% by weight, particularly preferably greater than 80% by weight and in particular greater than 98% by weight, based on the total used isocyanate.
  • the polyurethane elastomer preparation (v) further contains a carbodiimide, which is preferably based on a diisocyanate, or a uretonimine, which is preferably based on a diisocyanate.
  • the carbodiimide or the uretonimine is based on the diisocyanate used as a structural component in the polyurethane elastomer.
  • the carbodiimide is preferably present at 0.1 to 10% by weight in the polyurethane elastomer preparation (v). Details on the carbodiimide and its preparation can also be found in US 2007 021 349 6, the content of which is part of the disclosure of this application.
  • the uretonimine is preferably present at 0.01 to 5% by weight in the polyurethane elastomer composition (v).
  • the chain extender is selected from the group consisting of propanediol, butanediol, pentanediol, hexanediol, hydroquinone bis (2-hydroxyethyl) ether (HQEE) and 1,3-bis (2 -hydroxyethyl)resorcinol (HER), or is a mixture thereof.
  • a particularly preferred chain extender is 1,4-butanediol.
  • preferred embodiments of the polyurethane elastomer preparation (v) also contain a catalyst and auxiliaries or additives.
  • auxiliaries and additives include surface-active substances, foam stabilizers, cell regulators, other release agents, fillers, dyes, pigments, hydrolysis inhibitors, odor-absorbing substances and fungistatic and/or bacteriostatic substances.
  • the catalyst used is preferably a compound which accelerates the reaction of the isocyanate-reactive compound with the isocyanate.
  • amidines such as 2,3-dimethyl-3,4,5,6-tetrahydropyrimidine
  • tertiary amines such as triethylamine, tributylamine, dimethylbenzylamine, N-methyl-, N-ethyl-, N-cyclohexylmorpholine, N,N, N',N'-Tetramethylethylenediamine, N,N,N',N'-Tetramethylbutanediamine, N,N,N',N'-Tetramethylhexanediamine, Diazabicycloundecene, Pentamethyldiethylenetriamine, Tetramethyldiaminoethylether, Diazabicycloundecene (DBU), Bis-( dimethylaminopropyl)urea, dimethylpiperazine, 1,2-dimethylimidazole, 1-
  • organic metal compounds preferably organic tin compounds, such as tin(II) salts of organic carboxylic acids, eg tin(II) acetate, tin(II) octoate, tin(II) ethyl hexoate and tin (II) laurate and the dialkyltin (IV) salts of organic carboxylic acids, eg dibutyltin diacetate, dibutyltin dilaurate, dibutyltin maleate and dioctyltin diacetate, and bismuth carboxylates such as bismuth (III) neodecanoate, bismuth 2-ethylhexanoate and bismuth -octanoate or mixtures thereof.
  • organic tin compounds such as tin(II) salts of organic carboxylic acids, eg tin(II) acetate, tin(II) octo
  • DABCO 1,4-diaza-bicyclo-(2,2,2)-octane
  • DBU diaza-bicycloundecene
  • the diazabicycloundecene bicycloundecene is preferably 1,8-diazabicyclo[5.4.0]undec-7-ene, more preferably heat-activatable 1,8-diazabicyclo[5.4.0]undec-7-ene and particularly preferably one Phenol-blocked heat-activatable 1,8-diaza-bicyclo[5.4.0]undec-7-ene.
  • the organic metal compounds are preferably used alone or, in another preferred embodiment, in combination with strongly basic amines.
  • Suitable surface-active substances are, for example, compounds which serve to support the homogenization of the starting materials. Mention may be made, for example, of emulsifiers, such as the sodium salts of castor oil sulfates or of fatty acids, and salts of fatty acids with amines, e.g. diethylamine oleate, diethanolamine stearate, diethanolamine ricinoleate, salts of sulfonic acids, e.g. Oligomeric acrylates with polyoxyalkylene and fluoroalkane radicals as side groups are also suitable for improving the emulsifying effect.
  • emulsifiers such as the sodium salts of castor oil sulfates or of fatty acids, and salts of fatty acids with amines, e.g. diethylamine oleate, diethanolamine stearate, diethanolamine ricinoleate, salts of sulfonic acids, e.g. Oligomeric acryl
  • the surface-active substances are usually used in amounts of 0.01 to 5 parts by weight, based on 100 parts by weight of the polyol.
  • Suitable further release agents are: reaction products of fatty acid esters with polyisocyanates, salts of amino-containing polysiloxanes and fatty acids, salts of saturated or unsaturated (cyclo)aliphatic carboxylic acids having at least 8 carbon atoms and tertiary amines and, in particular, internal release agents such as carboxylic acid esters and/or or amides, produced by esterification or amidation of a mixture of montanic acid and at least one aliphatic carboxylic acid having at least 10 carbon atoms with at least difunctional alkanolamines, polyols and/or polyamines Molecular weights of 60 to 400 g/mol, as disclosed for example in EP 153639, mixtures of organic amines, metal salts of stearic acid and organic mono- and/or dicarboxylic acids or their anhydrides, as disclosed for example in DE-A-3 607 447, or mixtures from an imino compound, the metal salt of a carboxylic acid and optionally
  • Fillers in particular fillers with a reinforcing effect, are to be understood as meaning the customary organic and inorganic fillers, reinforcing agents, weighting agents, coating agents, etc. known per se.
  • Specific examples include: inorganic fillers such as silicate minerals, for example phyllosilicates such as antigorite, bentonite, serpentine, hornblende, amphibole, chrisotile and talc, metal oxides such as kaolin, aluminum oxide, titanium oxide, zinc oxide and iron oxide, metal salts such as chalk and barite, and inorganic pigments such as cadmium sulfide, zinc sulfide, and glass, etc.
  • inorganic fillers such as silicate minerals, for example phyllosilicates such as antigorite, bentonite, serpentine, hornblende, amphibole, chrisotile and talc
  • metal oxides such as kaolin, aluminum oxide, titanium oxide, zinc oxide and iron oxide
  • Suitable organic fillers are, for example: carbon black, melamine, rosin, cyclopentadienyl resins and graft polymers and cellulose fibers, polyamide, polyacrylonitrile, polyurethane, polyester fibers based on aromatic and/or aliphatic dicarboxylic acid esters and in particular carbon fibers.
  • the inorganic and organic fillers can be used individually or as mixtures and are advantageously added to the reaction mixture in amounts of 0.5 to 50% by weight, preferably 1 to 40% by weight, based on the weight of the polyurethane elastomer composition (v).
  • the polyurethane elastomer preparation (v) of the bearing according to the invention also has excellent mechanical properties, in particular the values for tensile strength, elongation at break, tear propagation resistance and abrasion are very good and, for example, also improved compared to the conventional method with direct addition of the molten chain extender to the prepolymer.
  • the hardness of the polyurethane elastomer preparation (v) can be adjusted via the formulation in the range from 50 to 90 Shore A, preferably in the range from 60 to 80 Shore A, more preferably in the range from 60 to 75 Shore A, particularly preferably in the range from 62 to 72 Shore A can be set.
  • the isocyanate index during production of the polyurethane preparation is from 85 to 130, preferably from 90 to 120, more preferably from 95 to 110, more preferably from 100 to 103, more preferably from 101 to 103, and the isocyanate index is very particularly preferably 102.
  • the isocyanate index is calculated stoichiometrically from the ratio of reactive isocyanate groups of the isocyanate used to the group of the polyol used which is reactive with the isocyanate group multiplied by 100.
  • Another subject of this invention is the use of the polyurethane elastomer preparation (v) described here for vibration damping or vibration decoupling, in particular for the frequency range between 30 Hz and 5000 Hz.
  • microcellular polyurethane used in particular embodiments in addition to the polyurethane elastomer preparation is known in principle and is described, for example, in WO9710278 or WO2018/087387.
  • the cellular polyisocyanate polyaddition products particularly preferably have at least one of the following material properties: a density according to DIN EN ISO 845 between 200 and 1100 kg/m 3 , preferably between 270 and 900 kg/m 3 , a tensile strength according to DIN EN ISO 1798 of >2, 0 N/mm 2 , preferably > 4 N/mm 2 , particularly preferably between 4 and 8 N/mm 2 , an elongation at break according to DIN EN ISO 1798 of > 200%, preferably > 230%, particularly preferably between 300% and 700% and/or a tear propagation resistance according to DIN ISO 34-1 B (b) > 6 N/mm, of > 8 N/mm, particularly preferably > 10 N/mm.
  • the cellular polyisocyanate polyaddition product has two, more preferably three, of these material properties; particularly preferred embodiments have all four of the material properties mentioned.
  • the elastomers based on cellular polyisocyanate polyadducts are usually produced in a form in which the reactive starting components are reacted with one another.
  • generally customary forms come into question as forms, for example metal forms, which, due to their form, ensure the three-dimensional form of the spring element according to the invention.
  • the microcellular polyurethane is injected directly into the spaces of the bearing intended for it.
  • microcellular polyurethane can be carried out according to generally known methods, for example by using the following starting materials in a one- or two-stage process: (a) isocyanate,
  • the production of the microcellular polyurethanes is advantageously carried out at an NCO/OH ratio of 0.85 to 1.20, with the heated starting components being mixed and placed in the mold in an amount corresponding to the desired molding density.
  • the amount of reaction mixture introduced into the mold is usually such that the moldings obtained have the density already mentioned.
  • the starting components are preferably introduced into the mold at a temperature of from 15 to 120.degree. C., preferably from 30 to 110.degree.
  • the degrees of compression for producing the shaped bodies are between 1.1 and 8, preferably between 2 and 6.
  • the cellular polyisocyanate polyaddition products are expediently produced by the one-shot process using low-pressure technology or, in particular, reaction injection molding (RIM) in open or preferably closed molds.
  • RIM reaction injection molding
  • the reaction is carried out in particular with compression in a closed mold.
  • the reaction injection molding technique is described, for example, by H. Piechota and H. Rschreib in "Integral foams", Carl Hanser-Verlag, Kunststoff, Vienna 1975; DJ Prepelka and J.L. Wharton in Journal of Cellular Plastics, March/April 1975, pages 87-98 and U. Knipp in Journal of Cellular Plastics, March/April 1973, pages 76-84.
  • Suitable isocyanates are all isocyanates which have also been described above for the polyurethane elastomer preparation (v).
  • the microcellular polyurethane is preferably produced with isocyanate-terminated prepolymers, preferably with isolates based on 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate (MDI) or 1,5-naphthylene diisocyanate (NDI) prepared, preferably on the basis of 1, 5-naphthylene diisocyanate (NDI).
  • MDI 2,2'-, 2,4'- and/or 4,4'-diphenylmethane diisocyanate
  • NDI 1,5-naphthylene diisocyanate
  • the isocyanate-reactive compound (b) has a statistical average of at least 1.8 and at most 3.0 Zerewitinoff-active hydrogen atoms; this number is also referred to as the functionality of the isocyanate-reactive compound (b) and indicates the theoretical down-calculated from a quantity of substance to one molecule Amount of isocyanate-reactive groups on the molecule.
  • the functionality is preferably between 1.8 and 2.6, more preferably between 1.9 and 2.2 and in particular 2.
  • Compounds which are reactive toward isocyanates are preferably polyester diols and polyether diols. .
  • Polyetherdiols based on ethylene oxide, propylene oxide and/or butylene oxide are preferred.
  • a particularly preferred polyether is polytetrahydrofuran (PTHF).
  • polyester is polycaprolactone.
  • Polyesteroie from the following group: copolyesters based on adipic acid, succinic acid, pentanedioic acid, sebacic acid or mixtures thereof and mixtures of 1,2-ethanediol and 1,4-butanediol, copolyesters based on adipic acid, succinic acid, pentanedioic acid, sebacic acid or their Mixtures and mixtures of 1,4-butanediol and 1,6-hexanediol, polyesters based on adipic acid and 3-methyl-1,5-pentanediol and/or polytetramethylene glycol (polytetrahydrofuran, PTHF).
  • Copolyesters based on adipic acid and mixtures of 1,2-ethanediol and 1,4-butanediol or polyesters based on adipic acid, succinic acid, pentanedioic acid, sebacic acid, or mixtures thereof and polytetramethylene glycol (PTHF) are particularly preferred.
  • Water acts as a blowing agent. It can be used alone or with other blowing agents. Water is preferably used as the sole blowing agent.
  • auxiliaries and/or additives can be added to the microcellular polyurethane, as have already been mentioned by way of example for the polyurethane elastomer preparation (v).
  • the polyurethane preparation (v) dampens forces in the frequency range from 1 Hz to 30 Hz, preferably in the frequency range from 8 Hz to 15 Hz
  • the polyurethane elastomer preparation (v) polyurethane elastomer exhibits a maximum of vibration isolation in the range between 30 Hz to 5000 Hz.
  • the dynamic hardening is used to evaluate the vibration decoupling.
  • the dynamic hardening is the quotient of the bearing stiffness for a dynamic and a quasi-static load on the bearing, i.e. c d / c s
  • the bearing stiffness under a dynamic load Cd is calculated from the gradient of the force-displacement curve with a sinusoidal excitation under a defined preload.
  • the Bearing stiffness under quasi-static load Cs is calculated from the slope of the force-displacement curve at the same preload point. See also Example 2 and Figure 5
  • the bearing stiffness cd is calculated from the gradient of the force-displacement curve with a sinusoidal excitation, preferably with an excitation amplitude of 0.1 mm.
  • the bearing damping D is represented as a loss angle, which indicates the phase shift of the output signal (force amplitude) compared to the input signal (displacement amplitude) with a sinusoidal excitation with an excitation amplitude of 0.1 mm.
  • the frequency f represents the number of sinusoidal excitations per second.
  • the quotient of the dynamic stiffness Cd at a frequency of 100 Hz and the static stiffness c s is calculated for the respective load directions.
  • Low dynamic hardening is preferably understood to mean dynamic hardening of less than 1.6, measured at an excitation frequency of 100 Hz and an excitation amplitude of 0.1 mm. Dynamic hardening under these conditions is more preferably less than 1.5, more preferably less than 1.4 and particularly preferably less than 1.3.
  • Another object of this invention and an embodiment 25 is a method for producing a bearing according to one of the above embodiments or their preferred embodiments, wherein the cavity (iii) of the bushing is closed so that the cavity (iii), at least partially with the Casting elastomer preparation can be poured out.
  • the preparation of all components of the polyurethane elastomer preparation (v) is referred to as cast elastomer preparation as long as the structural components have not yet reacted, ie the preparation is still flowable.
  • the casting elastomer preparation contains the structural components, if necessary additionally with a catalyst, auxiliary substance, additive, carbodiimide or mixtures thereof.
  • the cast elastomer composition is introduced into the cavity (iii) of the bush (ii) in which the fastener is in its final position relative to the bush or into which the fastener is placed in its final position relative to the bush before the cast elastomer composition cures to form the polyurethane elastomer composition.
  • molds are introduced into the cavity between bushing (ii) and fastener (iv), which can be removed after curing of the cast elastomer composition to the polyurethane elastomer composition and so to Lead gaps in the polyurethane elastomer preparation.
  • the components of the polyurethane casting elastomer system are mixed preferably at temperatures of 30 to 95° C., particularly preferably 40 to 95° C., more preferably 55 to 95° C. and in particular at 85 to 95° C.
  • This mixture is then cured, preferably in a mold, to give the polyurethane casting elastomer (v).
  • the mold temperatures are usually from 0 to 130.degree. C., preferably from 60 to 120.degree. C. and particularly preferably from 80 to 110.degree.
  • the components are usually mixed in low-pressure machines or high-pressure machines, preferably in high-pressure machines.
  • the high-pressure machine is advantageous because the Shore hardness can be adjusted in-line by mixing at the mixing head. The high-pressure process saves time-consuming cleaning of the mixing head.
  • the isocyanate index in the production of the polyurethane elastomer preparation (v) is 85 to 130, preferably 90 to 120, more preferably 95 to 110, more preferably 100 to 103, more preferably 101 to 103, and the isocyanate index is very particularly preferably 102.
  • the isocyanate index is calculated stoichiometrically from the ratio of reactive isocyanate groups of the isocyanate used to the isocyanate-reactive groups of the polyol used, multiplied by 100.
  • the finished polyurethane casting elastomers are preferably post-cured after demolding at elevated temperatures to further improve the mechanical properties.
  • the polyurethane casting elastomer (v) is preferably cured at 50° C. to 120° C., preferably at 60° C. to 110° C. and in particular at 80° 100oC to 100oC. This tempering preferably takes place over a period of 10 to 24 hours.
  • the bearing is used in particular for the vibration decoupling of electric motors, since the preferred embodiments in particular decouple the vibrations generated by an electric motor well.
  • the bearing is preferably used in vehicles that contain an electric motor. This electric motor is preferably used to drive the vehicle.
  • the bearing is mounted on a frame.
  • the electric motor is connected to the frame via one or more bearings in preferred embodiments.
  • the frame itself is connected to the vehicle body via four bearings.
  • a bearing was made from an outer bushing (ii) with a collar, an inner fastening element connected via a polyurethane elastomer preparation with two continuous recesses (vi) according to Figure 7.
  • the outer bushing is injection molded from a 30% glass fiber reinforced [6, 6] polyamide.
  • the outer bush has an outside diameter of 74 mm, an inside diameter of 68 mm and a length of 62 mm.
  • the outer bush (ii) was degreased with perchlorethylene on the inner surface in contact with the polyurethane elastomer preparation and roughened with steel grit using a trough belt blaster to an average peak-to-valley height of 25-50 ⁇ m.
  • a polyurethane adhesion promoter (CILBOND® 45SF) was then sprayed on with a layer thickness of approx. 15 - 25 ⁇ m. This was dried at a temperature of 80° C. for 10 minutes.
  • An aluminum alloy EN AW-6082 (AI SilMgMn) with a cylindrical through hole was used for the fastener.
  • the fastener has an outer diameter of 48mm, an inner diameter of 22mm and a length of 65mm.
  • the fastening element was first degreased on the outer contour with perchlorethylene (Per) and roughened by trough belt blasting with steel grit to an average peak-to-valley height of 25 - 50 ⁇ m.
  • adhesion promoter (CILBOND® 45SF) was applied by spraying up to a layer thickness of 15 - 25 ⁇ m. This was dried at a temperature of 80° C. for 10 minutes.
  • the A component (polyol component) and B component (isocyanate component) were provided in the proportions shown in Table 1 below.
  • the A component was mixed well under vacuum for two minutes and stored between 40 °C and 50 °C for 30 minutes.
  • the isocyanate mixture according to Table 1 was placed under a nitrogen atmosphere at 60° C. and then the polytetrahydrofuran (pTHF)-based polyol mixture was metered in in small amounts. After complete addition, the mixture was heated to 80°C to 90°C and maintained at this temperature for two hours. The B component was cooled and stored between 40°C and 50°C. 23
  • the A component was again homogenized with a mixer for two minutes under vacuum.
  • the mixing ratio of the A and B components was set according to the index given in the table.
  • the index is the ratio of isocyanate to groups reactive with the isocyanate multiplied by 100).
  • the A component was combined with the B component, mixed for 30 seconds under vacuum at 1750 rpm and poured into molds preheated between 90°C and 100°C. After 60 minutes, the specimens were demoulded and between for 48 hours. Tempered at 85°C and 95°C.
  • zeolite A particles 50% dispersion of zeolite A particles in castor oil, the zeolite A particles having a pore size of 0.3 nm, an average particle size of 5 ⁇ m and a sieve residue (0.042 mm sieve) of approx. 0.1% or have less.
  • the mold was heated to a temperature of 90°C.
  • the outer sleeve (ii) and fastener were also heated to 90°C.
  • the high-pressure mixing head was guided with the outlet nozzle to a sprue bushing in the casting tool.
  • Example 1 To demonstrate the suitability of the composition and contouring of the polyurethane elastomer preparation for the specific application, the bearings produced according to Example 1 were tested both quasi-statically and dynamically. That's what it became Bearing first pressed into a bearing mount (viii), which corresponds to the geometry of the bearing seat in the vehicle.
  • Bearing tests were performed using a servo-hydraulic testing machine, an Instron Hydropuls® MHF.
  • the bearing mount (viii) with the pressed-in bearing (i) was connected to the force transducer of the testing machine (x) via the bracket (ix).
  • the fastening element (iv) was connected directly to the movable piston of the testing machine for the axial test direction or via the test device (xi) for the radial test direction and loaded in the various spatial directions.
  • the deflection of the bushing as a result of the load was recorded via the applied force in different directions of the bearing using the displacement transducer of the testing machine and evaluated in the form of a force-displacement characteristic. The characteristic curves were corrected for the structural rigidity of the testing machine and the testing device.
  • the bush was fixed via the bearing mount and dynamically loaded in the various spatial directions via the fastening element.
  • the bearing was loaded with a sinusoidal path signal with an amplitude of 0.05 mm at different excitation frequencies in the range from 1 Hz to 200 Hz.
  • the force resulting from the deflection of the bushing was recorded with the force transducer of the testing machine and evaluated in the form of a force-displacement characteristic.
  • the dynamic stiffness and the loss angle were determined from these characteristic curves as a measure of the damping and their progression over the frequency was shown.
  • the values for the bearing from Example 1 are shown in FIG.
  • the quotient of the dynamic stiffness c d at a frequency of 100 Hz and the static stiffness c s was calculated for the respective load directions.
  • the respective values for c s and Cd can be found in FIG. 5 and FIG 6 can be removed.
  • the bearings have a dynamic hardening of 1.21 in the x loading direction, 1.18 in the y loading direction and 1.22 in the z loading direction.
  • the dynamic hardening is therefore clearly in the particularly preferred range of less than 1.3 in all load directions.

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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un palier destiné à amortir les vibrations (i) comprenant un coussinet (ii), qui entoure une cavité (iii), et un élément de fixation (iv), qui se situe dans ladite cavité (iii), une composition élastomère polyuréthane (v) compacte se trouvant dans la cavité et reliant le coussinet extérieur (ii) à l'élément de fixation (iv), et l'élastomère polyuréthane contenu dans la préparation élastomère polyuréthane (v) étant le produit de réaction et reliant le coussinet extérieur (ii) à l'élément de fixation (iv) et l'élastomère polyuréthane contenu dans la préparation élastomère polyuréthane (v) étant le produit de réaction composé des constituants de structure : diisocyanate, un polyesterdiol, un polyétherdiol ou un mélange de ceux-ci et un allongeur de chaîne, et la préparation contenant éventuellement en outre au moins un des constituants suivants : catalyseur, auxiliaire et additif. L'invention concerne en outre la fabrication d'un palier correspondant.
EP21843589.9A 2020-12-18 2021-12-10 Manchon de découplage à base d'un élastomère autonivelant Pending EP4263187A1 (fr)

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DE3405875A1 (de) 1984-02-18 1985-08-22 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von zelligen oder kompakten polyurethan-polyharnstoff-formkoerpern mit verbesserten entformungseigenschaften sowie innere formtrennmittel fuer das polyisocyanat-polyadditionsverfahren
DE3607447A1 (de) 1986-03-07 1987-09-10 Basf Ag Verfahren zur herstellung von formkoerpern mit einem zelligen kern und einer verdichteten randzone mit verbesserten entformungseigenschaften
DE3631842A1 (de) 1986-09-19 1988-03-24 Basf Ag Innere formtrennmittel, deren verwendung zur herstellung von formkoerpern nach dem polyisocyanat-polyadditionsverfahren und verfahren zur herstellung der formkoerper
DE19534163A1 (de) 1995-09-15 1997-03-20 Basf Ag Verfahren zur Herstellung von kompakten oder zelligen Polyurethan-Elastomeren und hierfür geeignete Isocyanatpräpolymere
DE10137302A1 (de) * 2001-08-01 2003-02-13 Basf Ag Rundlager
DE20206418U1 (de) * 2002-04-23 2002-07-04 Basf Ag Rundlager
DE10225796A1 (de) 2002-06-10 2003-12-18 Basf Ag Zelliges Polyurethanelastomer verklebt mittels Schmelzkleber
DE10225797A1 (de) 2002-06-10 2003-12-18 Basf Ag Rundlager
DE10225795A1 (de) * 2002-06-10 2003-12-18 Basf Ag Rundlager
DE10225793A1 (de) 2002-06-10 2003-12-18 Basf Ag Polyurethanelastomer haftend verbunden mit Polytetrafluorethylen
DE102004056548A1 (de) 2004-11-23 2006-05-24 Basf Ag Verfahren zur Herstellung von Verbundelementen, insbesondere Rundlagern
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