EP1516017A1 - Polyurethane elastomere lie par adherence a un polytetrafluoroethylene et palier elastique contenant un tel polyurethane elastomere - Google Patents

Polyurethane elastomere lie par adherence a un polytetrafluoroethylene et palier elastique contenant un tel polyurethane elastomere

Info

Publication number
EP1516017A1
EP1516017A1 EP03757017A EP03757017A EP1516017A1 EP 1516017 A1 EP1516017 A1 EP 1516017A1 EP 03757017 A EP03757017 A EP 03757017A EP 03757017 A EP03757017 A EP 03757017A EP 1516017 A1 EP1516017 A1 EP 1516017A1
Authority
EP
European Patent Office
Prior art keywords
polyurethane elastomer
bonded
polyurethane
hot melt
polytetrafluoroethylene
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.)
Withdrawn
Application number
EP03757017A
Other languages
German (de)
English (en)
Inventor
Andreas Wulf
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 SE
Original Assignee
BASF SE
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 SE filed Critical BASF SE
Publication of EP1516017A1 publication Critical patent/EP1516017A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0041—Foam properties having specified density
    • C08G2110/0066—≥ 150kg/m3
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2170/00—Compositions for adhesives
    • C08G2170/20—Compositions for hot melt adhesives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2350/00—Acoustic or vibration damping material

Definitions

  • the invention relates to polyurethane elastomer, preferably thermoplastic polyurethane and / or cellular, preferably micro-cellular polyurethane elastomer, which may optionally contain polyurea structures, particularly preferably as cellular polyurethane elastomer, such a one with a density according to DIN 53 420 of 200 to 1100, preferably 300 to 800 kg / m 3 , a tensile strength according to DIN 53 571 of greater than 2, preferably 2 to 8 N / mm 2 , an elongation according to DIN 53 571 of greater than 300, preferably 300 to 700% and a tear resistance according to DIN 53 515 of greater than 8 , preferably 8 to 25 N / mm, adhesively bonded to polytetrafluoroethylene, preferably bonded by means of a reactive hot melt adhesive to polytetrafluoroethylene, also referred to below as PTFE.
  • polyurethane elastomer preferably thermoplastic polyurethane and / or
  • the invention relates to processes for producing such polyurethane elastomers bonded to polytetrafluoroethylene, and to elastic bearings, preferably circular bearings, ie cylindrical bearings preferably with a hollow inner, preferably cylindrical sleeve (ix), preferably based on steel or aluminum, the polyurethane elastomer as the preferred cylindrical damping element (xi), which at least partially encompasses the inner sleeve and contains at least one outer, preferably cylindrical, sleeve (x), preferably based on steel or aluminum, which usually fixes the polyurethane elastomer and can preferably be used for the external connection of the circular bearing the polyurethane elastomers according to the invention and automobiles or trucks containing the polyurethane elastomers according to the invention preferably as elastic bearings.
  • elastic bearings preferably circular bearings, ie cylindrical bearings preferably with a hollow inner, preferably cylindrical sleeve (ix), preferably based on steel or aluminum, the
  • Elastic bearings are used in automobiles and other technical devices and are generally known. With the aid of such elastic bearings, units, chassis components, among other things, are connected to one another or to the body, for example in automobiles.
  • elastomer materials fulfill the function of elastic support; on the other hand, due to their viscous properties, they are able to dissipate energy and thus dampen vibrations.
  • a high degree of damping is required, in particular for the damping of large amplitudes of low-frequency vibrations, which, for example, influence the connection of the shock absorber to the body.
  • low amplitudes and higher frequencies high damping is undesirable for reasons of vehicle acoustics.
  • the damping behavior of current, conventional round bearings is depending on the intrinsic damping capacity of the elastomer material used.
  • certain elastic bearings for example those in which more than one direction is to be stored in the room, for example motor bearings
  • conventional elastic bearings based on rubber or cellular elastomers this is only possible to a limited extent because under load, due to the transverse expansion of the material, there is a reaction in the other directions, e.g. due to friction phenomena.
  • the object of the present invention was to develop elastic bearings containing polyurethane elastomers, in particular cellular polyurethane elastomers and / or thermoplastic polyurethanes, in which the effect on the individual directions of movement is minimized, for example by friction effects.
  • This task was able to be adhesively bonded by means of polyurethane elastomers to polytetrafluoroethylene, for example foils, pipes, plates, rods and other molded parts based on PTFE, preferably bonded by means of a reactive hot-melt adhesive with polytetrafluoroethylene, preferably with a polytetrafluoroethylene film, particularly preferably with a thickness of 0.2 mm to 5 mm.
  • the polyurethane elastomers according to the invention are therefore preferably bearing elements made of prefabricated semi-finished products, in which the surfaces available for disposition are laminated with foils made of PTFE.
  • Polytetrafluoroethylene and polytetrafluoroethylene films are generally known and are commercially available, for example, from Arthur Krüger, Hamburg.
  • electrical discharge chamber for example plasma polymerization
  • Fluorination Fluorination
  • a preferred embodiment of the present invention are bearings, preferably circular bearings, in particular for the automotive industry.
  • the polyurethane elastomers which are usually encompassed by solid structural parts such as bushings or sleeves, take on account of their elastic properties. damping. Due to the lamination with PTFE, it is now possible to optimize the characteristics in the individual degrees of freedom by deliberate decoupling. For example, there may be at least two, preferably 2 to 4, polyurethane elastomers within a bearing that derive the forces for specific directions.
  • the individual polyurethane elastomers are preferably laminated in different orientations with PTFE, preferably on the surfaces that are perpendicular to the direction in which the load is passed through the polyurethane elastomer.
  • a preferred bearing is shown in Figures 1 and 2. This bearing contains three polyurethane elastomers (i), (ii) and (iii), in which (ii) and (iii) mainly absorb forces in the Z direction, while the polyurethane elastomer (i) derives forces acting perpendicular to the Z axis.
  • circular bearings containing a preferably cylindrical, preferably hollow, inner sleeve, a preferably cylindrical outer sleeve, and between the inner sleeve and the outer sleeve, at least two damping elements based on polyurethane elastomers, which are in different orientations, in particular perpendicular orientations with respect to one another PTFE film are adhesively bonded and preferably one PTFE film is in contact with the inner sleeve and the other PTFE film is in contact with the outer sleeve.
  • the polyurethane elastomer can be produced in contact with the PTFE film from the starting materials for the production of the polyurethane elastomer, for example by direct foaming.
  • the generally known starting materials which are known to the person skilled in the art as well as the polyurethane elastomers themselves are suitable for the production of the polyurethane elastomers.
  • the polyurethane elastomers are usually produced from di- and / or polyisocyanates known for this purpose, compounds which are reactive toward isocyanates, usually polyether alcohols and / or polyester alcohols, and, if appropriate, chain extenders, catalysts, blowing agents and additives.
  • the PTFE film is preferred, in particular the surface on which the polyurethane elastomer is produced, before the polyurethane elastomer is produced or glued in contact with the PTFE film is pretreated by generally known and commercially available adhesion promoters, for example Chemosil® from Henkel or Cilbond from CIL.
  • the PTFE to the polyurethane elastomer for the adhesive connection of these materials.
  • It is preferably a reactive hot melt adhesive which preferably contains encapsulated isocyanates which are preferably embedded in a polyol matrix.
  • These reactive hot melt adhesives are characterized in that they e.g. applied as a powder to the surface to be bonded and quasi melted in the manner of an enamel, as a result of which they adhere stably to the surface to be bonded without losing any of their reactivity. It is thus possible to position the pretreated parts to be positioned without shearing the adhesive off the surface of the part.
  • the crosslinking reaction is initiated only when the prepositioned parts to be warmed up well above the melting point of the powder by breaking up the encapsulated isocyanates.
  • Applying the powder, e.g. with the usual particle size on the surface to be glued and the fixing of the powder by melting the powder is also referred to as "sintering".
  • the reactive hotmelt adhesive based on encapsulated isocyanates preferably has a melting range at temperatures of less than 95 ° C., preferably 30 ° C. to 90 ° C., particularly preferably 45 ° C. to 65 ° C., and a reaction range at temperatures preferably greater than 100 ° C. particularly preferably 110 ° C. to 125 ° C.
  • Such reactive hotmelt adhesives are available from Collano Ebnöther AG, Sempach-Station, Switzerland and are described in the article "Pre-Applicable PUR Hotmelts: Activation by Thermal Impact", Adhesive Gluing and Sealing, Volume 43, 10/99, pp. 22-24 ,
  • the method for producing polyurethane elastomers adhesively bonded to polytetrafluoroethylene, preferably polytetrafluoroethylene film can thus be carried out, for example, by powdering reactive hotmelt adhesives based on encapsulated isocyanates, preferably embedded in a polyol matrix, on the surface of the polyurethane elastomer and / or on the surface of the polytetrafluoroethylene film to be bonded, the pulverized, preferably with an average particle size of less than 500 microns, preferably 100 microns to 350 microns, reactive hot melt adhesives at a temperature of 30 ° C to 90 ° C, preferably 45 ° C to 65 ° C melts, the parts to be glued fixed to each other and then the reactive hot melt adhesive by heating to a temperature greater than 100 ° C, preferably 110 ° C to 125 ° C activated and by reacting the reactive hot melt adhesive, the polytetrafluoroethylene film to be bonded is bonded
  • the surface energy of the surface of the polytetrafluoroethylene film to be bonded can preferably be increased before this surface comes into contact with the reactive hot melt adhesive. This can be done by generally known methods, for example the etching already described, by electrical discharges or fluorination. Pretreatment of the PTFE surface with which the polyurethane elastomer is bonded is also possible and preferred with generally known and commercially available adhesion promoters, for example Chemosil® from Henkel or Cilbond from CIL.
  • the elastomers particularly preferably have the physical properties shown at the outset.
  • Elastomers based on polyisocyanate polyaddition products and their preparation are generally known and can be described in many different ways, for example in EP-A 62 835, EP-A 36 994, EP-A 250 969, DE-A 195 48 770 and DE-A 195 48 771.
  • the preparation is usually carried out by reacting isocyanates with compounds which are reactive toward isocyanates.
  • the elastomers based on cellular polyisocyanate polyaddition products are usually produced in a form in which the reactive starting components are reacted with one another.
  • generally customary shapes are considered as shapes, for example metal shapes which, because of their shape, ensure the three-dimensional shape of the spring element according to the invention.
  • the polyisocyanate polyaddition products can be prepared by generally known processes, for example by using the following starting materials in a one- or two-stage process:
  • auxiliaries and / or additives for example polysiloxanes and / or fatty acid sulfonates.
  • the cellular polyisocyanate polyaddition products preferably have a compression set of less than 25% in accordance with DIN 53 572, cubes measuring 40 mm ⁇ 40 mm ⁇ 30 mm without silicone coating being used as test specimens, the test being carried out with constant deformation, the test specimens being around 40 % pressed together and kept in the air circulation cabinet for 22 hours at 80 ° C, the test device is cooled to room temperature for 2 hours in the compressed state after removal from the heating cabinet, then the test specimen is removed from the test device and 10 min i 30 s after the removal of the Test specimen from the test facility the height of the test specimen is measured with an accuracy of 0.1 mm.
  • the preferred thermoplastic polyurethanes are also generally known as a material, are widely described and are commercially available.
  • the thermoplastic polyurethanes, also called TPU preferably have a Shore hardness of 60
  • a reactive hot melt in powder form (Purbond® HCM VN 555-1) was applied to the surface of a cylindrical, hollow outer bushing (x) with a height of 30 mm, an outer diameter of 52 mm and a diameter of the cavity of 48 mm made of aluminum Collano company applied and melted at a temperature of 60 ° C for 30 min.
  • a cylindrical, hollow bearing element (xi) with a height of 30 mm, an outer diameter of 48 mm and a diameter of the cavity of 38.5 mm was inserted into the outer bush (x) coated in this way.
  • the reactive hot melt was also applied to the inner surface of the bearing element.
  • a strip of the activated PTFE film (xii) with a thickness of 0.5 mm was inserted into the cavity of the bearing element (xi) prepared in this way and pretensioned with the inner bushing (ix).
  • the inner bush was made of steel with a height of 30 mm, an outer diameter of 38.5 mm and an inner diameter of 14.3 mm.
  • the assembled circular bearing was annealed at a temperature of 110 ° C for 180 minutes. The reaction process was initiated and carried out.
  • the corresponding circular bearing is shown in FIG. 3, the individual parts (ix), (x), (xi) and (xii) being shown pushed apart for a better overview.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un polyuréthane élastomère lié par adhérence à un polytétrafluoroéthylène.
EP03757017A 2002-06-10 2003-06-04 Polyurethane elastomere lie par adherence a un polytetrafluoroethylene et palier elastique contenant un tel polyurethane elastomere Withdrawn EP1516017A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10225793 2002-06-10
DE10225793A DE10225793A1 (de) 2002-06-10 2002-06-10 Polyurethanelastomer haftend verbunden mit Polytetrafluorethylen
PCT/EP2003/005820 WO2003104326A1 (fr) 2002-06-10 2003-06-04 Polyurethane elastomere lie par adherence a un polytetrafluoroethylene et palier elastique contenant un tel polyurethane elastomere

Publications (1)

Publication Number Publication Date
EP1516017A1 true EP1516017A1 (fr) 2005-03-23

Family

ID=29557739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03757017A Withdrawn EP1516017A1 (fr) 2002-06-10 2003-06-04 Polyurethane elastomere lie par adherence a un polytetrafluoroethylene et palier elastique contenant un tel polyurethane elastomere

Country Status (4)

Country Link
EP (1) EP1516017A1 (fr)
AU (1) AU2003242617A1 (fr)
DE (1) DE10225793A1 (fr)
WO (1) WO2003104326A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022128825A1 (fr) 2020-12-18 2022-06-23 Basf Polyurethanes Gmbh Manchon de découplage à base d'un élastomère autonivelant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB996764A (en) * 1961-08-18 1965-06-30 British Belting & Asbestos Ltd A new or improved bearing material
GB1111597A (en) * 1964-07-23 1968-05-01 Angus George Co Ltd Improvements relating to bearings having a fluorinated polymer sliding surface
JPS52132040A (en) * 1976-04-28 1977-11-05 Ishikawajima Harima Heavy Ind Co Ltd Adhesion of industrial materials
JPH06507224A (ja) * 1991-01-28 1994-08-11 ダブリュ．エル．ゴア アンド アソシエイツ，インコーポレイティド ブッシュライナー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03104326A1 *

Also Published As

Publication number Publication date
WO2003104326A1 (fr) 2003-12-18
AU2003242617A1 (en) 2003-12-22
DE10225793A1 (de) 2003-12-18

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