EP3645319A1

EP3645319A1 - Tyre provided with an object attached to the surface thereof

Info

Publication number: EP3645319A1
Application number: EP18737338.6A
Authority: EP
Inventors: Xavier LEBRUN; Guillaume PIBRE
Original assignee: Compagnie Generale des Etablissements Michelin SCA
Current assignee: Compagnie Generale des Etablissements Michelin SCA
Priority date: 2017-06-27
Filing date: 2018-06-11
Publication date: 2020-05-06
Also published as: CN110785296A; US20200157391A1; WO2019002712A1; FR3067983A1

Abstract

The invention concerns a tyre provided with an object attached to said tyre, said tyre comprising, at the interface between the tyre and the attached object, an adhesive layer with a thickness of between 1 and 5 mm, characterised in that said adhesive layer is made from a self-adhesive silicone composition. The invention also concerns the method for attaching an object to a tyre comprising the steps of applying, to the object and/or to the tyre, an adhesive layer comprising a self-adhesive silicone composition, said adhesive layer having a thickness of between 1 and 5 mm; and of joining the object and the tyre.

Description

Pneumatic with an object attached to its surface

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.

The recent development of tire pressure monitoring systems ("Tire Pressure Monitoring Systems" or "TPMS") is limited by the difficulty of quickly and permanently fixing an object to the surface of a tire.

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.

Also, 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. In addition, 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.

[0005] Considering the applications currently being developed which are based on the fixation of objects, particularly electronic ones on tires, it is interesting for manufacturers to develop fastening solutions that are fast, efficient and durable, while striving not to modify the manufacture of tires suitable for receiving these fixed objects. In particular, it is interesting to satisfy these conditions without requiring deletion anti-adhesive products on the surface of the tires, without requiring the preparation of a specific area of the tire for the reception of the object to be fixed, so as to fix the object on any type of tire, without preparation of surface of this tire. It is also advantageous to have fixing solutions that allow flexibility as to the nature of the object 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 use of such an assembly has the advantage of allowing the quick, effective and durable attachment of the object on any type of tire, without requiring a preparation of the tire surface before the attachment of the object. .

[0008] Also, 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.

In addition, 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.

Detailed description of the invention

In the present description, unless otherwise expressly indicated, all the percentages (%) indicated are% by weight.

On the other hand, 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 details of the invention will be explained below by the description, in a first step, the specific constituents of the tire according to one of the objects of the invention, then by the description of the tire manufacturing method and characterization tests carried out. I. Pneumatic of the invention

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

Composition of the adhesive layer

The adhesive layer of the tire of the invention is based on a self-adhesive silicone adhesive composition.

As known to those skilled in the art of adhesives, the term pressure-sensitive adhesive composition ("PSA" or "Pressure Sensitive Adhesive" in English) is used to refer to materials that are intrinsically sticky or have been rendered sticky by the addition of tackifying resins. There are several methods for identifying a PSA, including the following three:

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).

The most known and used adhesive tapes, sometimes called "tape" ("tape" in English) are the adhesive tapes based on PSA said "acrylic", known to those skilled in the art ("Technology of Pressure Sensitive Adhesives and Products ", by I.Benedek and MFFeldstein, chapter 5" Acrylic adhesives "by PBForeman) comprising 50 to 100% by weight of so-called" primary "monomers.

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.

Unlike acrylic PSA, self-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.

[0023] 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. Preferably, 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. However, 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. Preferably for the invention, in the 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). The most common resins used for the manufacture of silicone PSA are so-called MQ resins, mainly consisting of M (monofunctional) and Q (quadrifunctional) units; although many other combinations (MDT, MTQ, DTQ and MDTQ) can also be used. The 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. 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. For its part, the solvent-free pure MQ resin is a friable solid with a glass transition temperature of between 270 and 350 ° C.

The use of self-adhesive silicone adhesive compositions of polycondensation type involves the presence of a solvent in the composition, before it is evaporated. The resulting adhesive layer therefore no longer comprises a solvent, or simply in the trace state, the latter being an ingredient in the manufacture of the composition and a means for laying the composition on a support when it is used as an adhesive layer.

Preferably, 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. Preferably, 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.

In self-adhesive silicone adhesive compositions of the polyaddition type, 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.

The composition of the adhesive layer may optionally include various additives, such as fillers, peroxides, pigments, etc.

According to a preferred embodiment of the invention, 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.

[0037] Preferably also, 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).

Many adhesive silicone adhesive compositions are commercially available. Alternatively, 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.

Thickness of the adhesive layer

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. Thus, it is noted that 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.

When the thickness of the adhesive layer is too low, the mechanical decoupling is not sufficient and the adhesion of the object to the tire is less good. When the thickness is too great, the adhesion can be reduced due to decohesion of the adhesive layer. On the other hand, the evaporation of the solvent is more difficult, making the adhesion slower. For these reasons, preferably, the adhesive layer has a thickness in a range from 1 to 3 mm.

Those skilled in the art will be able to adapt the thickness of the adhesive layer depending in particular on the object to be fixed and / or the tire area on which the object is fixed.

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.

Pneumatic on which the object is fixed

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.

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). ). We therefore speak of an object fixed "on" the tire, this meaning as well on an outer or inner surface ("on" or "in" the tire ").

In a manner known to those skilled in the art, 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.

Thus, according to a preferred embodiment of the invention, 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. Preferably, 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.

Object attached to 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.

Preferably, 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).

IL Method of the invention

The method according to the invention is a method of fixing an object on a tire comprising the following steps:

- Application on the object and / or the tire of an adhesive layer comprising a silicone adhesive adhesive composition, said adhesive layer having a thickness in a range from 1 to 5 mm;

enjoining of the object and the tire.

According to this method, and as explained above, it is necessary to understand by the expression "on the tire", both on an outer surface of the tire, and on an inner surface of the tire that is to say "in »The tire. The attachment of the object is thus achieved very quickly and very simply. Fixation is effective and durable. It also has the advantage of being reversible.

Application of the adhesive layer

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. Preferably, to limit the industrial intrusion, the adhesive layer is deposited on the object to be fixed.

Preferably, when 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. Preferably, by evaporation in ambient air, at ambient temperature (23 ° C.), for example for 24 hours, for a thickness of the film of 3 mm.

Positioning of the object and the tire

For the method of the invention, it is possible to seal the object and the tire by any means known to those skilled in the art. Preferably, 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

Complementary elements of the invention are now described with the aid of Figure 1, presented without limitation, which shows a tire according to the invention, with an object attached to its surface.

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.

In the embodiment of the invention shown in Figure 1, 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 total thickness of the adhesive layers 1 1 and 24 is preferably between 1 and 5 mm, and very preferably between 1, 5 and 3 mm. Fixing the object 20 to the surface of the tire 1 is carried out according to the method of the invention, comprising the following steps:

application to the object and / or the tire of an adhesive layer based on a self-adhesive silicone adhesive composition, of a thickness of 2 mm for example;

- enjoining of the object and the tire.

In the examples discussed above, 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.

tests

Manual peel test

Adhesion tests (peel 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). Of course, 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;

a usual waterproof inner layer layer (1 mm); the assembly of this impervious layer and the adjacent carcass ply fabric 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 on the surface of the inner layer which will be in contact with the adhesive layer.

an adhesive layer to be tested;

a usual waterproof inner layer layer (1 mm); and

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.

30 mm wide strips were cut to the cutter. Both sides of the breakout primer were then placed into the jaws of an Instron ^® brand traction machine. The tests are carried out at ambient temperature and at a tensile speed of 100 mm / min. The tensile forces are recorded and these are standardized by the width of the specimen. A force curve is obtained per unit of width (in N / mm) as a function of the displacement of the moving beam of the traction machine (between 0 and 200 mm). The adhesion value chosen corresponds to the average value of this curve.

The peel measurements are carried out at room temperature (23 ° C) and / or at 80 ° C depending on the case.

Examples of compositions:

Table 1 below shows the compositions tested in which:

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-4 is a toluene solution

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

Table 1: compositions in pce

* The composition C2 is covered with anti-stick product before baking then application of an adhesive layer

(1) brominated copolymer of isobutylene and isoprene "BROMOBUTYL 2222" marketed by the company EXXON CHEMICAL Co;

(2) N-dicyclohexyl-2-benzothiazol sulfenamide ("Santocure CBS" from Flexsys);

(3) acrylic PSA "Acrotape AFT7410" from the company 3M - thickness 3 mm. (4) PSA silicone "Silicolease PSA 418" from the company Bluestar Silicone - obtained via a solution comprising 60% of PSA and 40% of toluene then evaporation of toluene - final thickness at 3 mm.

(5) Lupérox 101 peroxide sold by Sigma Aldrich

(6) Silicone PSA "Gergosil 902 D", silicone with composition similar to silicone "Silicease PSA 418", thickness layer 100 μηι on PET support thickness 23 μηι

Test results

To represent the adhesion of the adhesive layer on the sealed inner layer of the tire, in the absence of anti-adhesive product, the adhesion values are measured (peel test) for the assemblies of the layers C-3 to C -7 on the C-1 layer and the results are shown in Table 2.

Table 2

^: nm: not measured [0075] The results presented in table 2 show the advantage of using as 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 thickness of the layer C-7 is not sufficient to create adhesion as good as the layers according to the invention. To represent the adhesion of the adhesive layer on the sealed inner layer of the tire, in the presence of anti-adhesive product, the adhesion values are measured (peel test) for the assemblies of the layers C-3 to C -5 on the C-2 layer and the results are shown in Table 3.

Table 3

* nm: not measured

The results presented in 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.

Thus, 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.

Finally, 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. To do this, 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

Tier 3: tire death (15,000 km)

The results are shown in Table 4.

Table 4

It is found that in the tire according to the invention, the sensor remains stuck until complete wear of the tire.

Claims

1. A tire provided with an object fastened to said tire, said tire comprising at the interface between the tire and the fixed object, an adhesive layer having a thickness in a range from 1 to 5 mm, characterized in that said adhesive layer is based on a self-adhesive silicone adhesive composition.

2. A tire according to claim 1 wherein the self-adhesive silicone adhesive composition is of polycondensation or polyaddition type.

A tire according to any one of the preceding claims wherein the self-adhesive polycondensation silicone adhesive composition is based on a silicone polymer, a siloxane resin and a solvent.

4. A tire according to the preceding claim wherein the silicone polymer has a weight average molecular weight Mw in a range from 600000 to 1000000 g / mol.

5. A tire according to any one of claims 3 or 4 wherein the silicone polymer has at least one silanol terminus.

A tire according to any one of claims 3 to 5 wherein the polycondensation adhesive silicone adhesive composition comprises less than 20% by weight of diphenylsiloxane.

A tire according to any one of claims 3 to 6 wherein the siloxane resin has a number average molecular weight of 1000 to 10,000 g / mol.

8. A tire according to any one of claims 3 to 7 wherein the solvent is an aromatic solvent, preferably selected from the group consisting of toluene, xylene and mixtures thereof.

A tire according to any one of claims 1 or 2 wherein the self-adhesive silicone adhesive composition of polyaddition type is based on a silicone polymer and a catalyst.

10. A tire according to claim 9 wherein the silicone polymer is carrying vinyl-silicon functional groups and silicon hydrides.

1. A tire according to any one of claims 9 or 10 wherein the catalyst is preferably a platinum catalyst, preferably platinum.

The tire of any preceding claim wherein the self-adhesive silicone adhesive composition further comprises a peroxide.

The tire of any preceding claim wherein the self-adhesive silicone adhesive composition further comprises a filler.

14. A tire according to any one of the preceding claims, wherein the thickness of the adhesive layer is in a range from 1 to 5 mm and preferably from 1 to 3 mm thick.

15. A tire according to any preceding claim wherein said object is selected from the group consisting of an electronic device, a housing adapted to receive an electronic device, a decoration, a marking, an anti-noise device, a car device. -obturant.

16. A tire according to any one of the preceding claims wherein said object is an electronic device or a housing adapted to receive an electronic device.

17. A tire according to any one of the preceding claims wherein said object is fixed on the inner surface of said tire, preferably on its inner sealing layer.

18. A tire according to any one of the preceding claims wherein said object is fixed on the outer surface of said tire, preferably on its outer side.

19. A tire according to any one of the preceding claims wherein the surface of said tire, to which the object is attached, comprises a release agent layer.

A method of attaching an object to 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 adhesive layer having a thickness included in a field ranging from 1 to 5 mm;

- enjoining of the object and the tire.

21. Method according to the preceding claim comprising the following steps:

applying to the object and / or the tire an adhesive layer comprising a self-adhesive silicone adhesive composition of the polycondensation type;

evaporation of the solvent from the adhesive layer;

enjoining of the object and the tire.

22. Process according to the preceding claim, in which the evaporation step is carried out in ambient air and at room temperature (23 ° C.).

23. A method according to any one of claims 20 to 22, wherein the step of joining is performed by manual pressure.

24. Method according to any one of claims 20 to 23 wherein the object is fixed on a tire which has been previously baked.

25. The method according to the preceding claim, wherein the object is fixed on the tire without a step of removing a release agent layer on the surface of the tire.