WO2022008502A1 - Toothed belt - Google Patents

Toothed belt Download PDF

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Publication number
WO2022008502A1
WO2022008502A1 PCT/EP2021/068646 EP2021068646W WO2022008502A1 WO 2022008502 A1 WO2022008502 A1 WO 2022008502A1 EP 2021068646 W EP2021068646 W EP 2021068646W WO 2022008502 A1 WO2022008502 A1 WO 2022008502A1
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WIPO (PCT)
Prior art keywords
tetrapod
zinc oxide
toothed belt
rubber
shaped crystals
Prior art date
Application number
PCT/EP2021/068646
Other languages
German (de)
French (fr)
Inventor
Jörg NASS
Original Assignee
Nass, Michelle
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 Nass, Michelle filed Critical Nass, Michelle
Publication of WO2022008502A1 publication Critical patent/WO2022008502A1/en

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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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/08—Toothed driving belts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L15/00—Compositions of rubber derivatives
    • C08L15/005—Hydrogenated nitrile rubber

Definitions

  • the invention relates to a toothed belt according to the preamble of claim 1.
  • DE 102015 203 914 A1 discloses an elastomeric article with a rubber matrix, including a power transmission belt, with a reinforcement vulcanized into and/or onto the rubber matrix, for example a textile fabric, a metallic thread construction or the like.
  • This reinforcement embedded in the rubber matrix is used to transmit the forces acting on the elastomeric article, since the rubber matrix is usually not sufficiently able to do this due to its elastic behavior.
  • an adhesion system by which the reinforcement can be connected to the rubber matrix.
  • the reinforcement is treated with a before vulcanization
  • Adhesion promoter coated embedded in the nanotetrapods, which protrude at least with several arms from the adhesion promoter layer and engage in the surrounding raw rubber matrix.
  • the integrated and/or vulcanized reinforcement is both the chemical bond formed during vulcanization and the positive interaction of the
  • Nanotetrapods firmly bonded to the surface of the rubber matrix.
  • the rubber composition contains, among other things, zinc oxide whiskers (nanotetrapods made of zinc oxide) in addition to the usual components. According to DE 602005 002 589 T2, the addition of the tetrapods leads to the following effects:
  • EP 1 875 102 B1 discloses a toothed belt with a rubber mixture that can contain nano-zinc oxide tetrapods with a proportion by weight of up to 30%.
  • the use of nano-zinc oxide tetrapods is presented here as disadvantageous.
  • the disadvantages require additional measures. Therefore, the proportion by weight of the nano-zinc oxide tetrapods in the rubber compound is limited to a value between 0% and 30%. In the examples, only materials with a maximum of 10% by weight of nano-zinc oxide tetrapods are described.
  • the power is transmitted by embedded glass or aramid fibers, more rarely by embedded steel cables.
  • the power transmission is achieved by the tetrapod-shaped zinc oxide crystals distributed homogeneously in the rubber mixture.
  • the nano zinc oxide tetrapods (ZnO) are zinc oxide crystals with a size of several nanometers to a few micrometers, i.e. a few thousandths to millionths of a millimeter in size. They are in the form of tetrapods, four rigid arms radiating from a central point. Larger tetrapods of several meters are known as breakwaters to protect the coasts of Sylt or Helgoland, where the arms interlock and thus defy the forces of the sea currents.
  • Nano Zinc Oxide Tetrapods are needle-shaped crystals made from
  • Shape tetrapod shape (four feet)
  • DE 602005 002 589 T2 contains no information on the tensile strength of the rubber mixture provided with the tetrapods. The person skilled in the art does not find any information in this citation on hardness and notch strength, which are also important properties of toothed belts. The person skilled in the art would therefore put this DE 602005 002 589 T2 aside.
  • the diameter of the outer sphere of the tetrapod-shaped zinc oxide crystals is between 1 and 100 nanometers
  • the rubber mixture contains 40 to 50% by weight of tetrapod-shaped crystals
  • the rubber compound also contains antioxidants, zinc oxide, silica, oil separately or in combination.
  • nano-zinc oxide tetrapods from Tianjin YR Chemspec Co., Ltd. were used. used.
  • base rubber HNBR Hydrophiltened Acrylonitrile Butadiene Rubber
  • Vulcanization test (requirement: 150 °C for up to 300 min)
  • Increasing the content of nano zinc oxide tetrapods increases the possible torque and decreases the vulcanization time. If a possible torque of 30 dNm is desired, the vulcanization time in the column for the underlined torque specification is sufficient.
  • the rubber material is particularly suitable for use in toothed belts in motor vehicles. 2.
  • a strip of rubber is pressed into a dumbbell shape and the load is measured by the elongation.
  • the specification "100% modular" means a tensile load (tensile strength) at 100% elongation.
  • nano-zinc oxide tetrapods results in higher tensile strength.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to a toothed belt comprising a rubber compound containing zinc oxide which is in the form of tetrapod-shaped crystals, the tetrapod-shaped crystals being homogeneously distributed in the rubber compound. According to the invention, the rubber compound contains more than 30% by weight of the tetrapod-shaped crystals.

Description

ZAHNRIEMEN TIMING BELT
Die Erfindung betrifft einen Zahnriemen nach dem Oberbegriff von Anspruch 1. Stand der Technik The invention relates to a toothed belt according to the preamble of claim 1. Prior art
Beim Einsatz des Gummimaterials für Zahnriemen in Kraftfahrzeugen wird eine hohe Belastbarkeit bei Zugbelastung, eine große Härte sowie eine hohe Abriebfestigkeit verlangt. Die Verwendung von Zinkoxid, welches in Form von tetrapodenförmigen Kristallen vorliegt, ist z. B. in der EP 2 782 103 Al, allerdings für Lackdraht, und in der DE 10 2013 104 195 Al für optoelektronische Bauelemente beschrieben. When using the rubber material for toothed belts in motor vehicles, high resilience under tensile stress, great hardness and high abrasion resistance are required. The use of zinc oxide, which is in the form of tetrapod-shaped crystals, is e.g. B. in EP 2 782 103 A1, albeit for enamelled wire, and in DE 10 2013 104 195 A1 for optoelectronic components.
Die DE 102015 203 914 Al offenbart einen elastomeren Artikel mit einer Gummimatrix, unter anderem einen Kraftübertragungsriemen, mit einem in und/oder an die Gummimatrix ein- und/oder anvulkanisierten Festigkeitsträger, beispielsweise einem textilen Gewebe, einer metallischen Fadenkonstruktion oder ähnlichem. Dabei dient dieser in die Gummimatrix eingebetteten Festigkeitsträger dazu, die auf den elastomeren Artikel wirkenden Kräfte zu übertragen, da die Gummimatrix aufgrund ihres elastischen Verhaltens dazu meist nicht ausreichend in der Lage ist. DE 102015 203 914 A1 discloses an elastomeric article with a rubber matrix, including a power transmission belt, with a reinforcement vulcanized into and/or onto the rubber matrix, for example a textile fabric, a metallic thread construction or the like. This reinforcement embedded in the rubber matrix is used to transmit the forces acting on the elastomeric article, since the rubber matrix is usually not sufficiently able to do this due to its elastic behavior.
Offenbart wird außerdem ein Haftsystem, durch welches der Festigkeitsträger mit der Gummimatrix verbindbar ist. Zur Verbesserung der Haftung zwischen der Gummimatrix und dem Festigkeitsträger insbesondere im Hinblick auf einen Formschlussanteil, ist der Festigkeitsträger vor der Vulkanisation mit einemAlso disclosed is an adhesion system by which the reinforcement can be connected to the rubber matrix. In order to improve the adhesion between the rubber matrix and the reinforcement, in particular with regard to a form-fit component, the reinforcement is treated with a before vulcanization
Haftvermittler beschichtet, in den Nanotetrapoden eingebettet sind, die zumindest mit mehreren Armen aus der Haftvermittlerschicht herausragen und in die umgebende Rohgummimatrix eingreifen. Nach der Vulkanisation ist der ein- und/oder anvulkanisierte Festigkeitsträger sowohl durch die bei der Vulkanisation entstandene chemische Bindung als auch durch formschlüssige Wechselwirkung derAdhesion promoter coated, embedded in the nanotetrapods, which protrude at least with several arms from the adhesion promoter layer and engage in the surrounding raw rubber matrix. After vulcanization, the integrated and/or vulcanized reinforcement is both the chemical bond formed during vulcanization and the positive interaction of the
Nanotetrapoden mit der Oberfläche der Gummimatrix fest miteinander verbunden. Nanotetrapods firmly bonded to the surface of the rubber matrix.
Die DE 602005 002 589 T2 offenbart eine Gummizusammensetzung für einen Reifen sowie einen Luftreifen. DE 602005 002 589 T2 discloses a rubber composition for a tire and a pneumatic tire.
Die Gummizusammensetzung enthält neben üblichen Komponenten unter anderem auch Zinkoxidwhisker (Nanotetrapoden aus Zinkoxid). Der Zusatz der Tetrapoden führt laut DE 602005 002 589 T2 zu den folgenden Effekten: The rubber composition contains, among other things, zinc oxide whiskers (nanotetrapods made of zinc oxide) in addition to the usual components. According to DE 602005 002 589 T2, the addition of the tetrapods leads to the following effects:
• Exzellente Reibung auf vereister und verschneiter Straße durch ein Mikrokratzeffekt infolge der aus der Oberfläche des Reifens herausragenden Armen der Tetrapoden, die wie Spikes von Spikereifen wirken • Excellent friction on icy and snowy roads thanks to a micro-scratch effect due to the arms of the tetrapods protruding from the tire surface, acting like studded tire spikes
• Verbesserung der Abrasionsbeständigkeit • Improvement in abrasion resistance
• Verbesserung des Wärmewiderstandes • Improvement of thermal resistance
• Verbesserung der thermischen Leitfähigkeit • Improvement of the thermal conductivity
Über einen Einfluss auf die Zugfestigkeit oder Kerbfestigkeit, insbesondere eine Verbesserung dieser Eigenschaften wird allerdings nichts berichtet. Diese Eigenschaften werden nicht einmal erwähnt. Aus EP 1 875 102 B 1 ist ein Zahnriemen mit einer Gummimischung bekannt, die Nano-Zinkoxid-Tetrapoden mit einem Gewichtsanteil bis 30 % enthalten kann. Die Verwendung von Nano-Zinkoxid-Tetrapoden wird hier jedoch als nachteilig dargestellt. Die Nachteile machen zusätzliche Maßnahmen erforderlich. Daher beschränkt sich der Gewichtsanteil der Nano-Zinkoxid-Tetrapoden an der Gummimasse auf einen Wert zwischen 0 % und 30 %. In den Beispielen werden sogar nur Materialien mit maximal 10 Gew.-% Nano-Zinkoxid-Tetrapoden beschrieben. However, nothing is reported about an influence on the tensile strength or notch strength, in particular an improvement in these properties. These properties are not even mentioned. EP 1 875 102 B1 discloses a toothed belt with a rubber mixture that can contain nano-zinc oxide tetrapods with a proportion by weight of up to 30%. However, the use of nano-zinc oxide tetrapods is presented here as disadvantageous. The disadvantages require additional measures. Therefore, the proportion by weight of the nano-zinc oxide tetrapods in the rubber compound is limited to a value between 0% and 30%. In the examples, only materials with a maximum of 10% by weight of nano-zinc oxide tetrapods are described.
Aufgabe und Lösung der Erfindung Aufgabe der Erfindung: Es sollen die oben genannten Forderungen erfüllt werden. Für die Zahnriemen sollen eine hohe Belastbarkeit bei Zugbelastung, eine große Härte sowie eine hohe Abriebfestigkeit erreicht werden. OBJECT AND SOLUTION OF THE INVENTION Object of the invention: The above requirements are to be met. For the toothed belts, a high load capacity under tensile load, great hardness and high abrasion resistance should be achieved.
Diese Aufgabe wird bei einem Zahnriemen der eingangs genannten Art erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. This object is achieved according to the invention by the features of claim 1 in a toothed belt of the type mentioned.
Während es bei Autoreifen (DE 602005 002 589 T2) auf die Abrasion des Reifens und auf die Reibung auf der Fahrbahn, insbesondere auf der vereisten Fahrbahn, ankommt, kommt es bei Zahnriemen primär auf die Zugfestigkeit und Kerbfestigkeit an. While in the case of car tires (DE 602005 002 589 T2) it is the abrasion of the tire and the friction on the road, particularly on the icy road, that is important, with toothed belts it is primarily the tensile strength and notch strength that are important.
Die Kraft wird bei herkömmlichen Zahnriemen durch eingebettete Glas- oder Aramidfasem, seltener durch eingebettete Stahlseile übertragen. Erfmdungsgemäß wird die Kraftübertragung durch die homogen in der Gummimischung verteilten tetrapodenförmigen Zinkoxid-Kristalle erreicht. Die Nano-Zinkoxid-Tetrapoden (ZnO) sind Kristalle aus Zinkoxid mit einer Größe von mehreren Nano- bis wenigen Mikrometern, also wenige Tausendstel- bis Millionstel Millimeter klein. Sie haben die Form von Tetrapoden, vier starren Armen, die von einem zentralen Punkt ausgehen. Größere Tetrapoden von mehreren Metern kennt man als Wellenbrecher zum Küstenschutz von Sylt oder Helgoland, wo sich die Arme ineinander verhaken und so den Kräften der Meeresströmungen trotzen. With conventional toothed belts, the power is transmitted by embedded glass or aramid fibers, more rarely by embedded steel cables. According to the invention, the power transmission is achieved by the tetrapod-shaped zinc oxide crystals distributed homogeneously in the rubber mixture. The nano zinc oxide tetrapods (ZnO) are zinc oxide crystals with a size of several nanometers to a few micrometers, i.e. a few thousandths to millionths of a millimeter in size. They are in the form of tetrapods, four rigid arms radiating from a central point. Larger tetrapods of several meters are known as breakwaters to protect the coasts of Sylt or Helgoland, where the arms interlock and thus defy the forces of the sea currents.
Die Arme der Tetrapoden verhaken sich wie Heftklammern ineinander und bilden so einen festen Verbund. Nano-Zinkoxid-Tetrapoden sind nadelförmige Kristalle, hergestellt ausThe arms of the tetrapods interlock like staples and thus form a solid bond. Nano Zinc Oxide Tetrapods are needle-shaped crystals made from
Zinkmetalldampf und Sauerstoff. Dabei wachsen sie in Richtung der C-Achse des jeweiligen sechseckigen Kristalls des Zinkoxids aus allen der vier sich gegenüberliegenden Oberflächen eines Achtecks. Der Kristall findet Verwendung in Filtern mit sehr guten Filter- und Staub Sammlungseigenschaften aufgrund seiner Form, guter Lichtkatalysator Aktivierung aufgrund seiner Halbleiter- und UV-zinc metal vapor and oxygen. They grow in the direction of the C-axis of each hexagonal crystal of zinc oxide from all four opposing surfaces of an octagon. The crystal is used in filters with very good filter and dust collection properties due to its shape, good light catalyst activation due to its semiconductor and UV
Lichtaufnahmeeigenschaften sowie als antibakterielles Material (Zinkionen-Effekt). Light absorption properties and as an antibacterial material (zinc ion effect).
Eigenschaften: Characteristics:
Materialname: Zinkoxid Chemi sehe F ormel : ZnO Material Name: Zinc Oxide Chemical Formula: ZnO
Molekül Struktur: Einzelkristall (Nadelform) Molecule Structure: Single Crystal (Needle Shape)
Form: Tetrapoden-Form (vier Füße) Shape: tetrapod shape (four feet)
Durchschnittliche Länge eines Fußes: 10 pm bis 20 pm Spezifisches Gewicht: 5,78 kg/dm3 Relative Dichte (Schüttdichte): ca. 0,1 kg/dm3 Average length of a foot: 10 pm to 20 pm Specific weight: 5.78 kg/dm 3 Relative density (bulk density): approx. 0.1 kg/dm 3
Schmelzpunkt unter Druck: 2.000 °C Spezifische Hitze: 0,1248 cal/g * Grad Wärmeleitfähigkeit: 25,3 W/m * k Wärmeausdehnungskoeffizient: 3,18x 10-6rc Reflexionsindex: 1, 9-2,0 Die homogene Verteilung der tetrapodenförmigen Zinkoxid-Kristalle in der Gummimischung eines Zahnriemens geht nicht aus dem Stand der Technik hervor. Melting point under pressure: 2,000 °C Specific heat: 0.1248 cal/g * degrees Thermal conductivity: 25.3 W/m * k Thermal expansion coefficient: 3.18x 10-6rc Reflective index: 1.9-2.0 The homogeneous distribution of the tetrapod-shaped zinc oxide crystals in the rubber mixture of a toothed belt is not evident from the prior art.
Wenn dem Fachmann die Aufgabe gestellt wird, einen Zahnriemen zu entwickeln, dessen Herstellung nur eine kurze Vulkanisationszeit erfordert, von zum Beispiel nur 60 Minuten, wobei der Zahnriemen aber eine große Drehmoments-Übertragung und eine hohe Zugfestigkeit ermöglicht, ohne dass ein zusätzlicher Festigkeitsträger wie im Stand der Technik in die Rohgummimatrix eingearbeitet werden müsste, so ist die erfindungsgemäße Lösung aus dem folgenden Grunde nicht nahegelegt. If the specialist is given the task of developing a toothed belt, the production of which requires only a short vulcanization time, for example only 60 minutes, but the toothed belt enables high torque transmission and high tensile strength without the need for an additional reinforcement as in the Prior art would have to be incorporated into the raw rubber matrix, the solution according to the invention is not suggested for the following reason.
Ausgehend von der DE 102015 203 914 Al könnte der Fachmann zwar auf die DE 60 2005 002 589 T2 stoßen. Zur Lösung der erfindungsgemäßen Aufgabe würde der Fachmann die DE 602005 002 589 T2 aber nicht heranziehen. In der DE 602005 002 589 T2 sind keine Angaben zur Zugfestigkeit der mit den Tetrapoden versehenen Gummimischung zu finden. Auch zur Härte und zur Kerbfestigkeit, welche auch wichtige Eigenschaften von Zahnriemen sind, findet der Fachmann in dieser Entgegenhaltung keine Angaben. Der Fachmann würde daher diese DE 602005 002 589 T2 beiseitelegen. Starting from DE 102015 203 914 A1, the person skilled in the art could come across DE 60 2005 002 589 T2. However, a person skilled in the art would not use DE 602005 002 589 T2 to solve the task according to the invention. DE 602005 002 589 T2 contains no information on the tensile strength of the rubber mixture provided with the tetrapods. The person skilled in the art does not find any information in this citation on hardness and notch strength, which are also important properties of toothed belts. The person skilled in the art would therefore put this DE 602005 002 589 T2 aside.
Der Fachmann musste daher, ausgehend von der DE 102015 203 914 Al und in Kenntnis der DE 602005 002 589 T2, erfinderisch tätig werden, um zur erfindungsgemäßen Lösung zu gelangen. Starting from DE 102015 203 914 A1 and with knowledge of DE 602005 002 589 T2, the person skilled in the art therefore had to be inventive in order to arrive at the solution according to the invention.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angeführt. Advantageous developments of the invention are specified in the subclaims.
So wird vorgeschlagen, So it is suggested
- dass der Durchmesser der Umkugel der tetrapodenförmigen Zinkoxid-Kristalle zwischen 1 und 100 Nanometer groß ist, - that the diameter of the outer sphere of the tetrapod-shaped zinc oxide crystals is between 1 and 100 nanometers,
- dass die Gummimischung maximal 50 Gew.-% der tetrapodenförmigen Kristallen enthält, - that the rubber compound contains a maximum of 50% by weight of tetrapod-shaped crystals,
- dass die Gummimischung 40 bis 50 Gew.-% der tetrapodenförmigen Kristallen enthält, sowie - that the rubber mixture contains 40 to 50% by weight of tetrapod-shaped crystals, and
- dass die Gummimischung weiterhin Antioxidationsmittel, Zinkoxid, Silica, Öl separat oder in Kombination enthält. Ausfühmngsbeispiele - that the rubber compound also contains antioxidants, zinc oxide, silica, oil separately or in combination. examples
Im Folgenden werden mehrere Ausführungsbeispiele der Erfindung näher beschrieben. In den folgenden Ausführungsbeispielen und Versuchsreihen wurden Nano-Zinkoxid- Tetrapoden der Firma Tianjin YR Chemspec Co., Ltd. verwendet. Several exemplary embodiments of the invention are described in more detail below. In the following exemplary embodiments and test series, nano-zinc oxide tetrapods from Tianjin YR Chemspec Co., Ltd. were used. used.
Anwendungsbeispiel: Basisgummi HNBR (Hydrierter Acrylnitrilbutadien-Kautschuk) Application example: base rubber HNBR (Hydrogenated Acrylonitrile Butadiene Rubber)
1. Vulkanisations-Test: (Voraussetzung: 150 °C für bis zu 300 min) 1. Vulcanization test: (requirement: 150 °C for up to 300 min)
Drehmoment M (dNm) bei unterschiedlichem Gehalt an Nano-Zinkoxid-Tetrapoden
Figure imgf000006_0001
Torque M (dNm) at different levels of nano-zinc oxide tetrapods
Figure imgf000006_0001
Vergleichsversuche
Figure imgf000006_0002
Ergebnis: comparison tests
Figure imgf000006_0002
Result:
Die Erhöhung des Gehalts an Nano-Zinkoxid-Tetrapoden steigert das mögliche Drehmoment und verringert die Vulkanisationszeit. Ist ein mögliches Drehmoment von 30 dNm gewünscht, genügt die Vulkanisationszeit der Spalte für die unterstrichene Drehmoment- Angabe. Increasing the content of nano zinc oxide tetrapods increases the possible torque and decreases the vulcanization time. If a possible torque of 30 dNm is desired, the vulcanization time in the column for the underlined torque specification is sufficient.
Besonders geeignet ist das Gummimaterial zur Verwendung für Zahnriemen in Kraftfahrzeugen. 2. Die Härtemessung:
Figure imgf000007_0001
Figure imgf000007_0002
The rubber material is particularly suitable for use in toothed belts in motor vehicles. 2. The hardness measurement:
Figure imgf000007_0001
Figure imgf000007_0002
Die Erhöhung des Gehalts an Nano-Zinkoxid-Tetrapoden steigert die Härte der Mischung. Increasing the content of nano zinc oxide tetrapods increases the hardness of the mixture.
3. Der Zugversuch: 3. The tensile test:
Ein Gummistreifen wird in eine hantelförmige Form gepresst und die Belastung wird anhand der Verlängerung gemessen. Die Angabe „100% modulars“ bedeutet eine Zugbelastung (Zugfestigkeit) bei 100 % Verlängerung. A strip of rubber is pressed into a dumbbell shape and the load is measured by the elongation. The specification "100% modular" means a tensile load (tensile strength) at 100% elongation.
Zugbelastung in kgf/cm2
Figure imgf000007_0003
Vergleichsversuche
Figure imgf000008_0001
Ergebnis: Tensile load in kgf/cm 2
Figure imgf000007_0003
comparison tests
Figure imgf000008_0001
Result:
Die Erhöhung des Gehalts an Nano-Zinkoxid-Tetrapoden bewirkt eine höhere Zugfestigkeit. Typische Kombinationen von Inhalts stoffen bei Nano-Zinkoxid-Tetrapoden-Increasing the content of nano-zinc oxide tetrapods results in higher tensile strength. Typical combinations of ingredients in nano zinc oxide tetrapod
Gummimischungen: rubber compounds:
Vergleichsversuche
Figure imgf000008_0002
M100, M200, M300 bedeuten „100% modulars (kgf/cm2)“ bzw. „200% modulars (kgf/cm2)“ und „300% modulars (kgf/cm2)“. Erfindungsgemäße Versuche
Figure imgf000009_0001
comparison tests
Figure imgf000008_0002
M100, M200, M300 mean "100% modular (kgf/cm 2 )" or "200% modular (kgf/cm 2 )" and "300% modular (kgf/cm 2 )". Experiments according to the invention
Figure imgf000009_0001
Vergleichsversuche
Figure imgf000010_0001
comparison tests
Figure imgf000010_0001
Vergleichsversuche (Fortsetzung der Tabe le)
Figure imgf000011_0001
Comparative tests (table continued)
Figure imgf000011_0001

Claims

A n s p r ü c h e 1 Zahnriemen, enthaltend eine Gummimischung, die Zinkoxid enthält, welches in Form von tetrapodenförmigen Kristallen vorliegt, wobei die tetrapodenförmigen Kristalle homogen in der Gummimischung verteilt sind, dadurch gekennzeichnet, dass die Gummimischung mehr als 30 Gew.-% der tetrapodenförmigen Kristalle enthält. Claims 1 Toothed belt containing a rubber compound containing zinc oxide in the form of tetrapod-shaped crystals, the tetrapod-shaped crystals being homogeneously distributed in the rubber compound, characterized in that the rubber compound contains more than 30% by weight of the tetrapod-shaped crystals contains.
2 Zahnriemen nach Anspruch 1, dadurch gekennzeichnet, dass der Durchmesser der Umkugel der tetrapodenförmigen Kristalle zwischen 1 und 100 Nanometer groß ist. 2 Toothed belt according to claim 1, characterized in that the diameter of the periphery of the tetrapod-shaped crystals is between 1 and 100 nanometers.
3. Zahnriemen nach Anspruch 1, dadurch gekennzeichnet, dass die Gummimischung maximal 50 Gew.-% der tetrapodenförmigen Kristalle enthält. 3. Toothed belt according to claim 1, characterized in that the rubber mixture contains a maximum of 50% by weight of the tetrapod-shaped crystals.
4. Zahnriemen nach Anspruch 3, dadurch gekennzeichnet, dass die Gummimischung 40 bis 50 Gew.-% der tetrapodenförmigen Kristalle enthält. 4. Toothed belt according to claim 3, characterized in that the rubber mixture contains 40 to 50% by weight of the tetrapod-shaped crystals.
5. Zahnriemen nach Anspruch 1, dadurch gekennzeichnet, dass die Gummimischung weiterhin Antioxidationsmittel, Zinkoxid, Silica, Öl separat oder in Kombination enthält. 5. Toothed belt according to claim 1, characterized in that the rubber compound further contains antioxidants, zinc oxide, silica, oil separately or in combination.
PCT/EP2021/068646 2020-07-10 2021-07-06 Toothed belt WO2022008502A1 (en)

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JPH0379836A (en) * 1989-08-18 1991-04-04 Yunitsuta Kk Toothed belt
EP1875102A1 (en) 2005-04-26 2008-01-09 Mitsuboshi Belting Ltd. Power transmission belt for transmitting high loads
DE602005002589T2 (en) 2004-06-21 2008-06-26 Sumitomo Rubber Industries Ltd., Kobe Rubber composition for tires and pneumatic tires using them
EP2782103A1 (en) 2013-03-18 2014-09-24 Schwering & Hasse Elektrodraht GmbH Enameled wire
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JPH0379836A (en) * 1989-08-18 1991-04-04 Yunitsuta Kk Toothed belt
DE602005002589T2 (en) 2004-06-21 2008-06-26 Sumitomo Rubber Industries Ltd., Kobe Rubber composition for tires and pneumatic tires using them
EP1875102A1 (en) 2005-04-26 2008-01-09 Mitsuboshi Belting Ltd. Power transmission belt for transmitting high loads
EP1875102B1 (en) * 2005-04-26 2013-03-20 Mitsuboshi Belting Ltd. Power transmission belt for transmitting high loads
EP2782103A1 (en) 2013-03-18 2014-09-24 Schwering & Hasse Elektrodraht GmbH Enameled wire
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