EP1537353A1 - Construction de tuyau de transfert de fluide souple resistant aux coudes - Google Patents

Construction de tuyau de transfert de fluide souple resistant aux coudes

Info

Publication number
EP1537353A1
EP1537353A1 EP03794633A EP03794633A EP1537353A1 EP 1537353 A1 EP1537353 A1 EP 1537353A1 EP 03794633 A EP03794633 A EP 03794633A EP 03794633 A EP03794633 A EP 03794633A EP 1537353 A1 EP1537353 A1 EP 1537353A1
Authority
EP
European Patent Office
Prior art keywords
hose construction
elastomeric material
weight
thermoplastic elastomeric
hose
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Withdrawn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
EP03794633A
Other languages
German (de)
English (en)
Inventor
Ralph T. Blanchard
Michael Fonfara
Richard L. Rabe
Fernando A. Cuccioli
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.)
Titeflex Corp
Dow Silicones Corp
Original Assignee
Dow Corning Corp
Titeflex Corp
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 Dow Corning Corp, Titeflex Corp filed Critical Dow Corning Corp
Publication of EP1537353A1 publication Critical patent/EP1537353A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
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    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/544—Torsion strength; Torsion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
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    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/12—Polyvinylhalogenides containing fluorine
    • B32B2327/18—PTFE, i.e. polytetrafluoroethylene
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2377/00—Polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • 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
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • 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
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    • C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/42—Block-or graft-polymers containing polysiloxane sequences

Definitions

  • the present invention relates to a flexible, kink resistant, fluid transfer hose construction that employs a flexible and abrasion-resistant protective jacket that demonstrates the necessary mechanical properties to be included under a crimped sleeve or collar of a hose coupling.
  • Hose assemblies for conveying corrosive or aggressive materials are known. For automotive applications, these assemblies are typically routed through crowded engine compartments that reach temperatures ranging from -40 °C to 175 °C and carry fluids such as fuel and brake fluid that have the potential to chemically erode, swell or otherwise degrade the interior of the hose assemblies. Thus, these assemblies have to be resistant to physical, thermal and chemical degradation. Moreover, these hose assemblies have to resist kinking during installation, use and service.
  • Hose assemblies that include an inner fluor opolymer (e.g., polyte tr afluor oethylene (PTFE)) tube or cylindrical member surrounded by a loosely to tightly wound metallic (e.g., stainless steel) braid have been found to provide these necessary physical characteristics.
  • an inner fluor opolymer e.g., polyte tr afluor oethylene (PTFE)
  • PTFE polyte tr afluor oethylene
  • Abrasion-resistant materials have been used on these prior art braided hose assemblies as outer protective jackets for the purpose of protecting the metallic braid from e.g. corrosion and road hazards, and for the purpose of preventing the metallic braid from damaging or physically eroding nearby components in the engine compartment.
  • jacket materials used on these braided hose assemblies either do not demonstrate the necessary mechanical properties to include the material under the crimped sleeve or collar of a hose coupling or the l jacketed hose assemblies fail to demonstrate the necessary flexibility and kink resistance.
  • U.S. Patent No. 5,622,394 to Soles et al. describes a flexible hose assembly comprising a plastic outer coating 54 where it is necessary to strip the coating 54 back from an end of the hose 32 prior to attaching an end fitting.
  • abrasive tools used to strip the plastic coating 54 back from this area may damage the metallic braid.
  • HYTREL® polyester elastomers have been subjectively evaluated by automotive suppliers as being too stiff, while hose assemblies jacketed with DYNEONTM THV melt-processable fluoroelastomers, which are also stiff, are known to demonstrate poor kink resistance and to have a tendency to buckle, leading vehicle inspectors to believe that rupture of the hose is imminent.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • thermoplastic elastomeric material having improved flexibility for use as a protective jacket for such hose constructions.
  • the present invention therefore provides a flexible and abrasion resistant thermoplastic elastomeric material, which is suitable for use as a protective jacket on flexible, kink resistant, fluid transfer hose constructions, wherein the thermoplastic elastomeric material comprises a reaction product of:
  • a dior ganopolysiloxane gum having a plasticity of at least 30 and having an average of at least two alkenyl groups in its molecule, wherein the weight ratio of the diorganopolysiloxane gum to the polyamide resin(s) ranges from about 40:60 to about 75:25;
  • a compatibilizer selected from the group of:
  • a coupling agent having a molecular weight of less than 800 which contains at least two groups independently selected from ethylenically unsaturated group, epoxy, anhydride, silanol, carboxyl, oxazoline or alkoxy having 1 to 20 carbon atoms, in its molecule,
  • a functional diorganopolysiloxane having at least one group selected from epoxy, anhydride, silanol, carboxyl, amine, oxazoline or alkoxy having 1 to 20 carbon atoms, in its molecule, or / ' //.
  • a copolymer comprising at least one diorganopolysiloxane block and at least one block selected from polyamide, polyether, polyurethane, polyurea, polycarbonate or polyacrylate;
  • the present invention further provides a method for preparing the thermoplastic elastomeric material described above, wherein the method comprises: mixing components (a) through (e), wherein components (d) and (e) are present in an amount sufficient to cure component (b); and then curing component (b).
  • the present invention also provides a flexible, kink resistant, fluid transfer hose construction comprising: (1) a heat and chemically resistant inner tube; and
  • the present invention further provides a hose assembly comprising the above-referenced flexible, kink resistant, fluid transfer hose construction and coupling means.
  • FIG. 1 is a latitudinal cross-sectional view of the hose construction of the present invention
  • FIGS. 2 to 4 are latitudinal cross-sectional views of preferred embodiments of the inventive hose construction.
  • FIG. 5 is a longitudinal cross-sectional view of the hose assembly of the present invention.
  • the hose construction of the present invention which demonstrates a flexural modulus at 23 °C (as measured by ASTM D790) of less than or equal to about 330 MPa (preferably, less than or equal to about 320 MPa, and more preferably, from about 200 to about 320 MPa), may be used in a wide variety of applications.
  • a flexural modulus at 23 °C as measured by ASTM D790
  • the inventive hose construction may be used in freezer, refrigerator and air-conditioning systems and in the manufacture of semi-conductors.
  • the flexible, kink resistant, fluid transfer hose construction of the present invention is shown generally at 10.
  • the inventive hose construction 10 is basically comprised of a heat and chemically resistant inner tube 12 and a flexible and abrasion- resistant protective jacket 14 formed on inner tube 12.
  • Inner tube 12 which preferably has a wall thickness ranging from about 0.13 millimeters (mm) to about 1.9 mm and an inner diameter ranging from about 2.5 mm to about 50.8 mm, can be made of any polymeric material that is extrudable or moldable and that has a compressive strength (as measured by ASTM D695) of from about 3.4 MPa to about 310 MPa.
  • Such materials include fluorocarbon polymers, polyamides, polyethylene resins, polyesters, polyimides, polypropylene, polyvinylchloride, silicones, and mixtures thereof.
  • inner tube 12 is made of a fluorocarbon polymer such as PTFE, copolymers of tetrafluoroethylene and hexafluoropropylene (FEP), perfluroalkoxyl resins (PFA) and polymers of ethylene-tetrafluor oethylene (ETFE).
  • PTFE, FEP and PFA are sold by E.I. DuPont De Nemours, Inc., Wilmington, DE, under the trademark TEFLON.
  • ETFE is also sold by DuPont under the trademark TEFZEL More preferably, inner tube 12 is made of PTFE.
  • the flexible and abrasion-resistant protective jacket 14 formed on inner tube 12 is prepared from a thermoplastic elastomeric material and demonstrates the necessary mechanical properties to be included under a crimped sleeve or collar of a hose coupling. [0024] As will be readily appreciated, the ability to include protective jacket
  • the protective jacket 14 is a flame resistant, thermoplastic elastomeric material formed from optionally compatiblized polyamide (e.g., nylon) resins. Thermoplastic elastomeric materials formed from polyamide resins, which are suitable for use in the present invention, are described in U.S. Patent No.
  • thermoplastic elastomeric material used to form protective jacket 14 is a reaction product of:
  • a compatibilizer selected from the group of: /. a coupling agent having a molecular weight of less than 800 which contains at least two groups independently selected from ethylenically unsaturated group, epoxy, anhydride, silanol, carboxyl, oxazoline or alkoxy having 1 to 20 carbon atoms, in its molecule, // ' .
  • a functional diorganopolysiloxane having at least one group selected from epoxy, anhydride, silanol, carboxyl, amine, oxazoline or alkoxy having 1 to 20 carbon atoms, in its molecule, or / ' // ' .
  • thermoplastic elastomeric material is a reaction product of: (a) from about 30 to about 60 parts by weight, based on the total weight of the thermoplastic elastomeric material, of at least one Theologically stable polyamide resin having a melting point or glass transition temperature of from about 25 °C to about 275 °C;
  • a functional diorganopolysiloxane having at least one group selected from epoxy, anhydride, silanol, carboxyl, amine, oxazoline or alkoxy having 1 to 20 carbon atoms, in its molecule, or ///.
  • a copolymer comprising at least one diorganopolysiloxane block and at least one block selected from polyamide, polyether, polyurethane, polyurea, polycarbonate or polyacrylate;
  • an organohydrido silicon crosslinking compound in an amount sufficient to provide from about 3 to about 30 moles of SiH groups per mole of Si-alkenyl groups in component (b), wherein the organohydrido silicon crosslinking compound contains an average of at least two silicon-bonded hydrogen groups in its molecule;
  • a hydrosilation catalyst in an amount sufficient to provide from about 0.75 to about 100 parts per million (ppm) of metal ions based on the total weight of the thermoplastic elastomeric material.
  • the material used to form protective jacket 14 is a reaction product of:
  • thermoplastic elastomeric material (a) from about 30 to about 60 parts by weight, based on the total weight of the thermoplastic elastomeric material, of a mixture of polyamides comprising (/) from about 65 to about 75 parts by weight, based on the total weight of the polyamide mixture, of a nylon 6 resin; and (//) from about 25 to about 35 parts by weight, based on the total weight of the polyamide mixture, of a nylon 6/12 resin;
  • thermoplastic elastomeric material from about 40 to about 70 parts by weight, based on the total weight of the thermoplastic elastomeric material, of a polydimethylsiloxane material;
  • component (b) from about 0.5 to about 5 parts by weight, based on the total weight of the polyamide mixture, of an epoxy functional silicone fluid compatibilizer; (d) an organohydrido silicon crosslinking compound in an amount sufficient to provide from about 3 to about 30 moles of SiH groups per mole of Si-alkenyl groups in component (b);
  • thermoplastic elastomeric material (e) a hydrosilation catalyst in an amount sufficient to provide from about 0.75 to about 100 ppm of metal ions based on the total weight of the thermoplastic elastomeric material;
  • thermoplastic elastomeric material from about 0.4 to about 1.5 parts by weight, based on the total weight of the thermoplastic elastomeric material, of a silicone fluid; (g) from about 0.475 to about 0.525 parts by weight, based on the total weight of the thermoplastic elastomeric material, of an antioxidant; and
  • thermoplastic elastomeric material from about 0.4 to about 1.6 parts by weight, based on the total weight of the thermoplastic elastomeric material, of a colorant.
  • Exemplary materials for use in this most preferred embodiment are identified below: nylon 6 resin - available from Custom Resins, P.O. Box 46,
  • thermoplastic elastomeric material used to form protective jacket 14 may be prepared in accordance with the teachings of U.S. Patent No. 6,362,288 B1.
  • the thermoplastic elastomeric material is prepared by compounding the component mixture in a twin-screw extruder, where components (d) and (e) are present in the mixture in amounts sufficient to cure component (b), pelletizing the compounded mixture, and then vacuum drying the pellets overnight at 80 °C. The pellets may then be melt-blended and extruded over inner tube 12 and cured to form protective jacket 14.
  • the protective jacket 14 upon curing, will not adhere to inner tube 12.
  • the protective jacket 14 preferably has a wall thickness ranging from about 0.05 mm to about 2.54 mm and an inner diameter ranging from about 3.2 mm to about 19.0 mm or greater.
  • the flexible, kink resistant, fluid transfer hose construction 10 comprises: (1) a PTFE inner tube 12; and (2) a flexible and abrasion-resistant protective jacket 14 that comprises a flame resistant, thermoplastic elastomeric material formed from one or more compatiblized polyamide resins.
  • Hose construction 10 of the present invention may further comprise at least one reinforcing or barrier layer 16 prepared from reinforcing or barrier materials loosely or tightly braided, woven or wound about the exterior of inner tube 12.
  • Materials suitable for use in layer 16 include metal (e.g., carbon, carbon steel, copper, brass, stainless steel and alloys thereof) and non-metal (e.g., polyester, nylon, aramid) reinforcing or barrier materials.
  • layer 16 is a barrier layer comprising one or more metal layers laminated to the outer surface of inner tube 12. The metal layer(s), which serves to reduce permeation of e.g.
  • barrier layer 16 is a single-walled aluminum structure prepared in accordance with the methods described in U.S. Patent No. 5,40,334 to O'Melia et al. and U.S. Patent No. 5,531,841 to O'Melia et al. [0036] More preferably, barrier layer 16 is prepared by dispersing a fluoropolymer in a chromate conversion coating and then by applying the resulting mixture to a strip of aluminum foil having a thickness of from about 0.025 to about 2.500 mm.
  • the fluoropolymer/ conversion coated aluminum strip is then either axially or helically wrapped around a pre-existing fluoropolymer tube.
  • the resulting construction is then heated to a temperature of about 350 °C for approximately 3 to 5 minutes.
  • the axially or helically wrapped aluminum foil strip is overlapped (e.g., 15 to 50 % overlap) to cover any gaps or leak paths in the aluminum foil layer thereby further reducing permeation through hose construction 10.
  • layer 16 is a reinforcing layer comprising an interwoven braid or a spiral winding of one or more synthetic fibrous materials.
  • Such fibrous materials include, but are not limited to, aramid fibers, polyethylene fibers, poly(p-phenylene-2,6-benzobisoxazole) fibers, polyvinyl alcohol fibers, and mixtures thereof.
  • Aramid yarns or fibers are sold by E. I. du Pont de Nemours and Company, 1007 Market Street, Wilmington, DE 19898, under the trade designation KEVLAR synthetic aramid fiber, and by Teijin Shoji (USA), 42 W 39 th St. FI. 6, New York, NY 10018-3809, USA, under the trade designation TECHNORA para-aramid fiber.
  • Polyethylene fibers are available from Honeywell International Inc., 101 Columbia Road, Morristown, NJ 07962, under the trade designation SPECTRA polyethylene fiber, and also from Toyobo Co., Ltd., DYNEEMA Department, 2-8, Dojimahama 2-chome, Kita-Ku, Osaka 530- 8230, JAPAN, under the trade designation DYNEEMA SK60 polyethylene fiber.
  • layer 16 is a reinforcing layer comprising an interwoven braid or a spiral winding of a metal (e.g., stainless steel) wire.
  • Reinforcing or barrier layer 16 preferably has a wall thickness ranging from about 0.025 mm to about 2.000 mm and an inner diameter ranging from about 3.2 mm to about 100.0 mm.
  • Hose construction 10 of the present invention may include additional layers, which overlie the exterior surface of protective jacket 14.
  • hose construction 10 may further comprise one or more additional reinforcing or barrier layers and, optionally, one or more additional flexible and abrasion-resistant protective jackets.
  • a polymeric material is extruded to form an inner tube 12 having a wall thickness of from about 0.13 mm to about 1.9 mm and an inner diameter of from about 2.5 mm to about 50.8 mm.
  • a reinforcing or barrier material may then be braided, weaved or wound about the exterior of inner tube 12 to form reinforcing or barrier layer 16.
  • the pelletized thermoplastic elastomeric material is then melt-blended and extruded onto either the inner tube 12 or the reinforcing or barrier layer 16 and is then cross-linked using known techniques which include chemical and radiation cross-linking methods.
  • FIG. 5 a preferred embodiment of the flexible, kink resistant, fluid transfer hose assembly of the present invention is shown generally at 18.
  • a crimp collar 20 is positioned on a cut end 22 of hose construction 10 followed by the insertion of a tube-like fitting 24 into the interior 26 of the inner tube 12.
  • Tubelike fitting 24 may be mechanically formed to produce beads or upsets 28a, 28b, 28c, along its length either before or after the fitting 24 is inserted into inner tube 12.
  • beads or upsets 28a, 28b serve to provide resistance to tube movement under internal pressure to the hose 10, while bead or upset 28c serves as a "stop bead” to ensure the proper depth of insertion of fitting 24 into inner tube 12.
  • the crimp collar 20 and fitting 24 are then mechanically attached to hose 10 by applying sufficient force to deform the collar 20 around the hose 10 and to effect a seal between the outside diameter of the fitting 24 and the inside diameter of the inner tube 12.
  • the hose assembly of the present invention which comprises hose construction 10 and coupling means, demonstrates a balance of physical properties.
  • the inventive hose assembly satisfies the minimum requirements set by the Automotive Industry, namely - (1) tensile pull strength - the ability to withstand a pull of at least about 1445 Newtons (N) (325 pounds), preferably, at least about 5382 N (1210 pounds), and more preferably, at least about 5471 N (1230 pounds), without separation of the hose from its end fittings (U.S.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

La présente invention concerne une construction de tuyau de transfert de fluide souple résistant aux coudes qui utilise une gaine de protection souple et résistant à l'abrasion. Cette gaine de protection présente les propriétés mécaniques nécessaires pour être incluse sous un manchon ou sous un collier à bord rabattu d'un raccord de tuyau, ce qui augmente la durée de vie de ce tuyau grâce au fait, par exemple, que des produits chimiques dégradants ne peuvent accéder dans des couches sous-jacentes au niveau de chaque extrémité de cette construction de tuyau.
EP03794633A 2002-09-09 2003-09-05 Construction de tuyau de transfert de fluide souple resistant aux coudes Withdrawn EP1537353A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US40970802P 2002-09-09 2002-09-09
US409708P 2002-09-09
PCT/US2003/027867 WO2004023026A1 (fr) 2002-09-09 2003-09-05 Construction de tuyau de transfert de fluide souple resistant aux coudes

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EP1537353A1 true EP1537353A1 (fr) 2005-06-08

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Publication number Priority date Publication date Assignee Title
FR2885672B1 (fr) * 2005-05-11 2007-06-22 Technip France Sa Conduite tubulaire flexible a gaine anti-usure
FR2959235B1 (fr) * 2010-04-21 2013-09-20 Hutchinson Elastomere reticule a transformation thermoplastique et son procede de preparation
ES2607634T3 (es) 2012-11-16 2017-04-03 Kongsberg Actuation Systems Ii, Inc. Procedimiento de formación de un conjunto de manguera
KR20160122120A (ko) * 2013-12-19 2016-10-21 허친슨 동력 차량의 엔진 구획의 요소 및 이 요소를 금속 할라이드로부터의 화학적 공격으로부터 보호하는 방법
JP7067931B2 (ja) 2015-03-03 2022-05-16 タイトフレックス コマーシャル インコーポレイティド 複合ホースアセンブリ

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NL166304C (nl) * 1977-02-23 1981-07-15 Vredestein Nv Buis voor het transport van een mengsel van vloeistof en vast materiaal.
US5972450A (en) * 1995-10-10 1999-10-26 Bundy Corporation Metal tubing coated with multiple layers of polymeric materials
US6153691A (en) * 1998-10-07 2000-11-28 Dow Corning Corporation Thermoplastic silicone vulcanizates prepared by condensation cure
US6281286B1 (en) * 1999-09-09 2001-08-28 Dow Corning Corporation Toughened thermoplastic resins
US6362287B1 (en) * 2000-03-27 2002-03-26 Dow Corning Corportion Thermoplastic silicone elastomers formed from nylon resins
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AU2003276866A1 (en) 2004-03-29
WO2004023026A1 (fr) 2004-03-18

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