Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J183/00—Adhesives based on 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; Adhesives based on derivatives of such polymers
  • C09J183/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J143/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Adhesives based on derivatives of such polymers
  • C09J143/04—Homopolymers or copolymers of monomers containing silicon
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
  • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
  • B01J23/42—Platinum
• • 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
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/0061—Accessories, details or auxiliary operations not otherwise provided for
• • 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
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
  • B60C23/02—Signalling devices actuated by tyre pressure
  • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
  • B60C23/0491—Constructional details of means for attaching the control device
  • B60C23/0493—Constructional details of means for attaching the control device for attachment on the tyre
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
• • 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
  • B29D30/00—Producing pneumatic or solid tyres or parts thereof
  • B29D30/0061—Accessories, details or auxiliary operations not otherwise provided for
  • B29D2030/0077—Directly attaching monitoring devices to tyres before or after vulcanization, e.g. microchips
• • 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
  • C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
• • 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
  • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
  • C08K3/013—Fillers, pigments or reinforcing 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
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/14—Peroxides

Definitions

• the present invention relates to tires, and more particularly to tires provided with an object, for example electronic, attached to their inner surface and / or outer.
• TPMS Tire Pressure Monitoring Systems
• the document US 201 1/0308706 proposes a tire comprising a silicone sound-absorbing foam, fixed by a self-adhesive rubber composition on a surface of the tire prepared so as to be devoid of anti-sticking product.
• the document US 2007/0089824 proposes the fixing of a noise damper via the use of adhesive strips on a surface of the tire prepared so as to be devoid of anti-adhesive product.
• This solution requires the manipulation of these adhesive strips.
• the adhesive strips described are very flexible objects and very thin. This causes a fragility of these materials that can be damaged by elongation or tear during handling during the manufacture of the tire. In order to limit this mechanical damage and to obtain the optimal properties related to the use of the adhesive strips, these must be supported on a non-stick strip which generates the production of waste.
• the use of adhesive tapes can lead to a limited adhesion of the objects fixed in the tires, resulting in less flexibility of use as to the nature of the objects to be fixed.
• the invention relates to a tire provided with an object attached to said tire, said tire comprising at the interface between the tire and the fixed object, an adhesive layer of a thickness comprised in a range from 1 to 5 mm, characterized in that said adhesive layer is based on a self-adhesive silicone adhesive composition.
• the specific materials used for the invention make it possible to maintain good adhesion of the object to the tire, including when the tire is in use when hot.
• this method of attachment provides great freedom as to the geometry and functions of the object due to the attachment of the object after baking (vulcanization) of the tire.
• the object may be a housing adapted to receive an electronic device.
• the object can also be an electronic device. It can also be a marking on the tire or a decoration.
• Another object of the invention is a method of fixing an object on a tire comprising the steps of applying to the object and / or the tire an adhesive layer comprising a self-adhesive silicone adhesive composition, said layer adhesive having a thickness in a range of 1 to 5 mm; and joining the object and the tire.
• Fixing the object is thus achieved very quickly and very simply. Fixation is effective and durable. It also has the advantage of being reversible and does not require the preparation of a reception surface of the object on the tire, such as a particular area provided for fixing during the manufacture of the tire, or the removal of anti-stick products on the tire.
• any range of values designated by the expression “between a and b” represents the range of values from more than a to less than b (that is, terminals a and b excluded). ) while any range of values designated by the expression “from a to b” signifies the range of values from a to b (that is to say, including the strict limits a and b).
• the tire according to the invention provided with an object fixed on said tire, said tire comprising at the interface between the tire and the fixed object, an adhesive layer of a thickness comprised in a range from 1 to 5 mm, characterized in that said adhesive layer is based on a self-adhesive silicone adhesive composition.
• Adhesive layer of a thickness comprised in a range from 1 to 5 mm, characterized in that said adhesive layer is based on a self-adhesive silicone adhesive composition.
• the adhesive layer of the tire of the invention is based on a self-adhesive silicone adhesive composition.
• PSA Pressure-sensitive adhesive composition
• PSA Pressure Sensitive Adhesive
• a PSA can be described by the Dahlquist criteria from the mechanical and viscoelastic point of view
• a PSA is a material that has tack (or "tack”) permanently and aggressively at room temperature and strongly adheres to various surfaces by simple contact without the need for pressure greater than that applicable to the hand,
• a PSA is a material whose storage modulus is between 0.02 MPa and 0.04 MPa at a frequency of 0.1 rad / s (0.017 Hz) and 0.2 MPa at 0.8 MPa at a frequency of 100 rad / s (17 Hz).
• VHB Very High Bond
• 3M PSA acrylic adhesive tapes known under the designation "VHB” (Very High Bond) are proposed by the company 3M, are conformable to non-planar surfaces and are used for the purposes of the invention, such as for example the “VHB4955 ".
• the High performance "VHB” adhesive tapes are assembly tapes consisting of a homogeneous mass of foamed acrylic adhesive.
• silicone PSA silicone adhesive compositions are very resistant to aging, including in the severe conditions of use in tires.
• These properties of silicone PSAs are inherent to the nature of the silicones, including their flexibility over a wide temperature range, the weak intermolecular interactions, their low surface tension, their thermal stability, the UV transparency, the high temperature stability, excellent electrical insulation properties, chemical resistance, and weather resistance.
• the adhesive silicone adhesive compositions may be in particular of two types, corresponding to two processes of obtaining, by polycondensation or by polyaddition.
• Self-adhesive silicone adhesive compositions of the polycondensation type are based on a silicone polymer, a siloxane resin and a solvent. These silicone PSA polycondensation type are usually delivered in a solvent.
• the silicone polymer is preferably a high molecular weight polymer, having a weight average molecular weight (Mw) in a range from 600000 to 1000000 g / mol.
• Mw weight average molecular weight
• the polymer has at least one silanol (SiOH) terminus.
• Copolymers of dimethylsiloxane and diphenylsiloxane may be in commercial silicone PSA.
• Silicones containing diphenylsiloxane units offer improved adhesive properties, particularly at elevated temperatures.
• the presence of diphenylsiloxane also causes a rise in the glass transition temperature, increasing the stiffness of the backbone of the silicone polymer. Therefore, the amount of diphenylsiloxane in a silicone polymer is preferably less than or equal to 20%, more preferably in a range of 0 to 18%, more preferably 5 to 15%.
• the siloxane resin is the other major component of self-adhesive silicone adhesive compositions of the polycondensation type.
• the siloxane resin has a number-average molecular weight (Mn) in a range from 1000 to 10,000 g / mol.
• the siloxane resin incorporates a wide range of siloxane materials, type M (mono functional), D (difunctional), T (trifunctional) or Q (quadrifunctional).
• MQ resins mainly consisting of M (monofunctional) and Q (quadrifunctional) units; although many other combinations (MDT, MTQ, DTQ and MDTQ) can also be used.
• MQ resins are preferably used for the invention in self-adhesive silicone adhesive compositions of the polycondensation type.
• This resin is commonly represented in the form [M x Q] m where x is the M / Q ratio, and is typically between 0.6 and 1.2 for 1 and m is the number average molecular weight of the resin. (Mn), between 1000 and 10000 g / mol.
• the MQ resins can be synthesized from sodium silicate and chlorosilanes through a fairly complex process, and delivered in a solvent, such as toluene or xylene.
• a solvent such as toluene or xylene.
• the M: Q ratio and silanol content are carefully controlled during the manufacturing process to give the resins the desired structure. Characterization of an MQ resin structure is a complex task, so that the variants are usually expressed in terms of the viscosity of the solution in toluene or xylene.
• the solvent-free pure MQ resin is a friable solid with a glass transition temperature of between 270 and 350 ° C.
• the solvent is an aromatic solvent, preferably selected from the group consisting of xylene, toluene or a mixture thereof. More preferably, the solvent is toluene.
• the polycondensation silicone PSAs comprise 50 or 60% solids / dry residue in the solvent to maintain the viscosity of the product in a suitable range, preferably below 80,000 mPa / s for use.
• Self adhesive silicone adhesive compositions of polyaddition type are based on a silicone polymer, and a catalyst.
• An advantage of this type of composition is that no solvent is required in the composition.
• the silicone polymers preferably carry functional groups vinyl-silicon (Si-Vi) and hydride groups of silicon (SiH).
• the catalyst is preferably a platinum catalyst, and preferably platinum (Pt).
• the cross-linking reaction of the platinum-catalyzed functional silicone polymer allows the reaction of silicon hydride (SiH) on the vinyl function to form a network via methylene bonds.
• composition of the adhesive layer may optionally include various additives, such as fillers, peroxides, pigments, etc.
• the composition of the adhesive layer comprises at least one peroxide.
• Peroxides especially 2,4-dichlorobenzoyl peroxide and dibenzoyl peroxide, are preferred.
• the peroxides make it possible to carry out a crosslinking in the adhesive composition and are incorporated in the form of a solution.
• the peroxide crosslinking operation is usually carried out in ovens multizone, with a temperature of the first zone of the order of 70 to 90 ° C, so that the solvent can be evaporated before the decomposition of the peroxide occurs.
• Peroxide crosslinking of PSA silicone is a multi-step mechanism, well known to those skilled in the art. At high temperature, the peroxide is first decomposed into radicals. These radicals formed lead to the formation of methylenes radicals in the silicone backbone. Methylene radicals react with adjacent radicals to form bridges between the methylenes of the silicone polymer. Temperatures of 130 to 170 ° C or higher for 2,4-dichlorobenzoyl peroxide and 150 to 200 ° C for benzoyl peroxide are common. The peroxide concentration is typically 0.5 to 3% by weight of adhesive composition.
• the composition of the adhesive layer comprises a filler.
• the filler may be silica or carbon black or any other reinforcing filler or not. It can improve the cohesion of the product by not degrading or little adhesion properties of the product.
• the load can also be used to reduce the cost of the sticky system by adding a cheap compound (especially in the case of non-reinforcing fillers).
• adhesive silicone adhesive compositions are commercially available.
• the preparation of the adhesive layer of the tire of the invention can be done by mixing the various ingredients detailed above, by any means known to those skilled in the art, in the presence of solvent for example, and particularly in the case of an adhesive silicone adhesive composition of the polycondensation type, or any other means.
• the adhesive layer of the tire of the invention has a thickness in a range from 1 to 5 mm.
• the known adhesive tapes such as acrylic adhesive tapes PSA known as "VHB", or (see EDT silicone tape) have very low thicknesses and are often preferred with the smallest possible thicknesses. Typically, these thicknesses are of the order of a few tenths of a millimeter and especially less than 0.38 mm as indicated in the document US2007 / 0089824.
• the thickness of the adhesive layer of the invention differs from known adhesive tapes, with a thickness greater than one millimeter; this allows the adhesion of objects of different natures and different for the one hand the surface of the tire and secondly that of the object to be fixed.
• the adhesive layer has a thickness in a range from 1 to 3 mm.
• the adhesive layer in the tire of the invention is obtained by any means known to those skilled in the art and, for example and preferably, according to the method of the invention described below.
• the invention relates to any type of pneumatic tire, and more particularly the tires intended to equip tourism-type motor vehicles, SUV ("Sports Utility Vehicles"), two wheels (including motorcycles), planes, like vehicles. selected from light trucks, "heavy goods vehicles” - that is, metro, bus, transport equipment road transport (trucks, tractors, trailers), off-the-road vehicles such as agricultural or civil engineering vehicles, other transport or handling vehicles.
• SUV Sport Utility Vehicles
• two wheels including motorcycles
• planes like vehicles.
• light trucks "heavy goods vehicles” - that is, metro, bus, transport equipment road transport (trucks, tractors, trailers), off-the-road vehicles such as agricultural or civil engineering vehicles, other transport or handling vehicles.
• the tire on which the object is fixed can be prepared by any means known to those skilled in the art, with the usual materials. Preferably, it is cooked before fixing the object as discussed below for the method of the invention.
• the tire of the invention is provided with the object fixed on any inner and / or outer surface, and in particular the flank or the inner waterproof layer (sometimes called inner liner or “inner liner” in English). ).
• the flank or the inner waterproof layer sometimes called inner liner or “inner liner” in English.
• the surface of the tire and in particular the surface of the inner wall, usually the sealed inner layer, may be provided with a layer of release agent, sometimes also called product. anti-stick or wash.
• This layer is usually deposited on the surface of the tire before it is fired in order to prevent this surface from adhering strongly to the membrane of the baking press or to the baking mold during the latter.
• This release agent layer acts as a protective anti-stick layer.
• An advantage of the invention is that the adhesive layer allows the adhesion of the object including when the tire is provided with a layer of release agent.
• the tire according to the invention and useful in the process of the invention comprises at least one layer of release agent.
• Release agents are well known to those skilled in the art and may include and preferably include at least one silicone polymer and talc.
• the release agent layer consists of a silicone polymer or a mixture of silicone polymers and talc.
• the release agent layer may for example be obtained by spraying an aqueous suspension of one or more silicone polymers and talc on a non-crosslinked surface of the tire.
• the object can be of any type. This may be for example a housing adapted to receive an electronic device (for example an RFID chip).
• the object can also be an electronic device (for example an RFID chip). It can also be a marking on the tire or a decoration. It may also be a layer having a particular function, such as an anti-noise foam or a self-sealing layer.
• the object is chosen from the group consisting of an electronic device, a housing adapted to receive an electronic device, a decoration, a marking, an anti-noise device (such as an anti-noise foam). , a self-sealing device (such as a self-sealing layer).
• the method according to the invention is a method of fixing an object on a tire comprising the following steps:
• an adhesive layer comprising a silicone adhesive adhesive composition, said adhesive layer having a thickness in a range from 1 to 5 mm;
• the adhesive layer may be applied by any means known to those skilled in the art such as a thin film deposition in the presence of the solvent on the tire and / or the object to be fixed. Another way is to make a sticky film with composition to achieve the joint between the two parts to be bonded with this adhesive.
• the adhesive layer may be applied either to the tire, to the area chosen for fixing the object; either on the object to be fixed, or on both the tire and the object to be fixed.
• the adhesive layer is deposited on the object to be fixed.
• the adhesive layer is based on a self-adhesive silicone adhesive composition of polycondensation type
• this layer is applied by any means known to those skilled in the art such as the deposition of a film of controlled thickness, then the solvent is evaporated.
• This evaporation can be practiced by any means known to those skilled in the art.
• the joint is operated by manual pressure, requiring the use of any tool.
• the setting pressure is preferably greater than 0.05 bar above atmospheric pressure. Examples of realization
• This tire 1 comprises a vertex 2 reinforced by a crown reinforcement or belt 6, two sidewalls 3 and two beads 4, each of these beads 4 being reinforced with a rod 5.
• the crown reinforcement 6 is surmounted radially outwardly. of a rubbery tread 9.
• a carcass reinforcement 7 is wound around the two rods 5 in each bead 4, the upturn 8 of this armature 7 being for example disposed towards the outside of the tire 1.
• the carcass reinforcement 7 is in known manner constituted of at least one sheet reinforced by so-called "radial" cables, for example textile or metal, that is to say that these cables are arranged substantially parallel to each other and s' extend from one bead to the other so as to form an angle of between 80 ° and 90 ° with the median circumferential plane (plane perpendicular to the axis of rotation of the tire which is situated halfway between the two booms) rrelets 4 and goes through the middle of the crown frame 6).
• a sealing layer 10 extends from one bead to the other radially inwardly relative to the carcass reinforcement 7.
• the tire 1 is such that its inner wall comprises an object 20 fixed by an adhesive layer 1 1.
• the adhesive layer 11 consists of a self-adhesive silicone adhesive composition, as described above and in particular chosen from those proposed in the examples below.
• the fixed object 20 comprises a housing 22 and an adhesive layer 24.
• the material of the adhesive layer 24 is of the same nature as that of the layer Adhesive 1 1.
• the object is attached to the inner surface of the tire; it is also possible to place it on an external surface of the tire, for example on the sidewall of the tire.
• Adhesion tests were conducted to test the ability of the adhesive layer to adhere to a diene elastomer layer, more specifically to a conventional rubber composition for a sealed inner layer (sometimes also called “inner liner" of tire, based on butyl rubber (isobutylene and isoprene copolymer) also comprising the usual additives (filler, sulfur, accelerator, ZnO, stearic acid, antioxidant).
• a sealed inner layer sometimes also called “inner liner” of tire, based on butyl rubber (isobutylene and isoprene copolymer) also comprising the usual additives (filler, sulfur, accelerator, ZnO, stearic acid, antioxidant).
• this test can be adapted to the case where the object is to be placed on the sidewall of the tire, in this case, it will be used to make the specimens a layer of rubbery mixture sidewall instead of a layer of waterproof inner layer usual.
• the peel test pieces (of the 180 ° peel type) were made by stacking the following products:
• a fabric of carcass carcass tourism type the assembly of this carcass ply fabric and the adjacent impervious layer being premixed for 40 minutes at 150 ° C., and according to the cases explained in the examples, a layer of anti-adhesive product can be added to the surface of the layer internal which will be in contact with the adhesive layer.
• a rupture primer is placed at the interface between one of the sealed inner layer layers and the adhesive layer.
• the peel measurements are carried out at room temperature (23 ° C) and / or at 80 ° C depending on the case.
• Cl is a customary composition of sealed interior layer and free of anti-adhesive product
• C-2 is a customary composition of waterproof inner layer baked and covered with anti-stick product.
• the anti-adhesive product consists of water, a silicone polymer and talc;
• C-3 is an acrylic adhesive tape Acrotape AFT7410 marketed by 3M company
• C-5 and C-6 are self-adhesive silicone adhesive compositions suitable for the adhesive layer of the tire according to the invention
• C-7 is a self-adhesive silicone adhesive composition that is suitable for the adhesive layer of the tire according to the invention
• composition C2 is covered with anti-stick product before baking then application of an adhesive layer
• brominated copolymer of isobutylene and isoprene "BROMOBUTYL 2222" marketed by the company EXXON CHEMICAL Co;
• Silicone PSA "Gergosil 902 D", silicone with composition similar to silicone "Silicease PSA 418", thickness layer 100 ⁇ on PET support thickness 23 ⁇
• Table 3 show the advantage of using as an adhesive layer a self-adhesive silicone adhesive composition according to the invention. This allows adhesion values of the adhesive layer on the inner liner greater than those provided by an acrylic adhesive tape or toluene solvent.
• the test with toluene alone shows that it is not the solvent that promotes adhesion with the adhesive layer of the invention, although the latter is present during the application of the adhesive layer in solution.
• the invention allows a quick and reversible attachment of objects to the surface of a tire without the disadvantages associated with the preparation of the contact surface.
• this method of attachment provides great freedom as to the geometry and functions of the object due to post vulcanization fixation.
• a comparative rolling test is performed between the thin silicone layer C-7 and the silicone layer C-5.
• a sensor is fixed using an adhesive layer C-7 or C-5 on the sealed inner layer of a tire.
• the rolling test is performed on a rolling machine, at a constant speed of 110 km / h, with overload and over inflation of the tire to solicit the maximum at the top.
• the tire is planed to further increase the load.
• the temperature of the sealed inner layer stabilizes at about 85 ° C during travel.
• the performance of the adhesion solution is determined by defining three bearings and by examining during which bearing the sensor comes off:
• Tier 1 the tire rolls at least 5000 km
• Tier 2 the tire rolls at least 10,000 km
• the senor remains stuck until complete wear of the tire.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Materials Engineering (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Tires In General (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Cites Families (17)

• 2017
  • 2017-06-27 FR FR1755853A patent/FR3067983A1/fr active Pending
• 2018
  • 2018-06-11 WO PCT/FR2018/051355 patent/WO2019002712A1/fr unknown
  • 2018-06-11 EP EP18737338.6A patent/EP3645319A1/de active Pending
  • 2018-06-11 CN CN201880041997.1A patent/CN110785296A/zh active Pending
  • 2018-06-11 US US16/626,670 patent/US20200157391A1/en not_active Abandoned

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