DE102018205644A1 - Structure of a self-sealing tire sealant - Google Patents

Abstract

The invention relates to a structure of a self-sealing tire sealant, which has on at least one surface a tackiness-reducing coverage.

Description

The invention relates to a structure of a self-sealing tire sealant, which has on at least one surface a tackiness-reducing coverage.

Self-sealing configured pneumatic vehicle tires are for example from the DE 10 2006 059 286 A1 the applicant known. This standard tire constructions are subsequently provided with a sealant layer. The self-sealing sealant is a self-adhesive, viscous sealant, which is applied as a layer from the radially inner in the projection region of the belt package on the radially innermost tire layer, the inner layer largely executed airtight. The sealant layer is capable of self-sealing punctures of up to five millimeters in diameter. After a puncture through the tread through the inner layer of the sealant completely encloses the foreign body, sealing the interior from the environment and thus prevents a loss of compressed air of the tire. The driver of the vehicle is not forced to replace the defective tire immediately by a full-value spare wheel or a spare wheel.

The sealant is characterized by airtightness, strong stickiness and balanced flow behavior.

However, currently only certain pneumatic vehicle tires are usually equipped with the sealant as new tires, while it might be necessary to subsequently equip other tire types and / or dimensions with a sealant.

The present invention is therefore based on the object to provide an automatically sealing tire sealant for a variety of different tire types and dimensions and thus make them accessible.

The object is achieved by the structure according to the invention of an automatically sealing tire sealant which has a tackiness-reducing covering on at least one surface.

The advantage of the invention is in particular that thus a sealing means described above is provided in a manner that it z. B. also allows the private consumer to equip a pneumatic vehicle tires later with a sealant. This is under subsequently especially not only the breakdown case meant in which u. a. Latex-based sealants are subsequently introduced into the tire. Instead, any type of new tire should be able to be provided with a sealing means described above before driving, which are not already configured ex works as self-sealing pneumatic vehicle tires.

The fact that the tire sealant is provided as a structure with a cover, it can be handled separately, so even without being incorporated into a tire, and provided in the supply chain to the end user. Once the sealant is to be introduced into the tire, the covering of the sticky surface of the sealant is conveniently removed to adhere the sealant to the tire inner surface, in particular at least on the inner surface opposite the tread.

The covering of at least part of the tacky surface of the tire sealant has the advantage that no contaminants and objects adhere to the sealant and thus reliably adheres to the tire inner surface later after removal of the cover.

The structure of the tire sealant can be provided in particular in variable form and dimension, so that it is accessible for different tire sizes. Thereafter, then expediently also the extent of the surface, which is provided with the cover.

Furthermore, the layer thickness (measured in the radial direction ( rR ) perpendicular to the axial direction ( aR ) of the vehicle tire) of the sealant later in the tire by layer thickness and shape of the structure can be adjusted.

The layer thickness of the cover is also in the radial direction ( rR ) perpendicular to the axial direction ( aR ).

According to advantageous embodiments, the layer thickness of the covering is from 0.01 to 4 mm, for example 0.1 mm.

According to advantageous embodiments, the layer thickness of the sealant is from 1 to 9 mm, preferably 3 to 5 mm, for example 3.5 mm.

The structure can in principle assume any shape that is suitable to store the sealant, to transport and later apply to the inside of the tire.

According to an advantageous and exemplary embodiment of the invention, the structure has the form of a roll. This has the advantage that the sealant is already in a form which it later at least in a similar manner as a sealant layer in the Interior of the vehicle tire assumes. Thus, the sealant can be applied in the form of a role as a structure particularly simple by rolling on the tire inner surface.

Further, rollers can be suitably produced after the preparation of the sealant composition, for example, by providing the sealant as a quasi-endless belt of variable width and can be variably cut to length and rolled into rolls.

Thus, the sealing means for a variety of tire dimensions, in particular the circumference of the tire inner side and axial width of the tread, can be provided.

By "axial width" is meant the length in the axial direction.

By "roller" is meant a structure which arises from a particular flat structure of the sealant by rolling to a single or multi-layer concentric rolled up structure. The flat structure is in particular a band. The winding up takes place by definition in the direction of rotation ( UR ) of the role.

Advantageously, this is also the direction of rotation of the pneumatic vehicle tire, in which the sealant is introduced by rolling.

But it is also conceivable that one or more smaller roles - d. H. Length of the sealant tape is smaller in the unrolled state than the inner circumference of the tire - are applied in the interior of the vehicle tire in a variable direction by rolling, such as in the axial direction.

For the role as an example of the structure, the above statements apply to the layer thicknesses of sealant and covering. In this case, the information radial direction, axial direction and direction of rotation of the vehicle tire then apply equally to the role.

According to advantageous embodiments, the roller has an axial width of 1 to 500 mm, preferably 40 to 300 mm. The width of the roller can be chosen in particular so that it makes up half the axial width of the pneumatic vehicle tire, in which the sealant is applied.

For example, the roller has an axial width of 40 to 120 mm.

According to an advantageous embodiment of the invention, the sealing means of the roller at least on the radially outwardly directed surface on at least one tackiness-reducing covering.

The "radially outwardly directed surface" is understood to mean any surface of the sealant which is directed radially outward, ie in the case of a multilayer concentrically rolled up sealant in projection any surface which is directed outward, including the surfaces radially outward have further concentrically arranged sealant / coating layers.

Particularly preferred is the entire radially outwardly directed surface of the sealant, so thus the entire surface, which is to adhere later to the tire inner side, covered.

Thus, at least the exposed area, which can absorb impurities fastest, is protected from removing the cover and the application in the tire.

According to an advantageous embodiment of the invention, the radially inwardly directed surface of the sealant of the roll on such a cover.

The "radially inwardly directed surface" is understood to be any surface of the sealant which is directed radially inward, ie in the case of a multi-layer concentrically rolled up sealant in projection any surface that is directed inward, including the surfaces radially inward have further concentrically arranged sealant / coating layers.

According to an advantageous embodiment of the invention, the radially outward and radially inwardly directed surface of the sealant of the roll has such a covering.

Furthermore, the radially inwardly directed surface of the roll can also be covered in other ways, for example with a substance or particles which reduce the stickiness and need not be removed again.

This radially inwardly directed surface of the sealant of the roll is later the radially inwardly directed surface of the sealant layer of the tire.

In principle, the tack-reducing cover may be any type of cover suitable for reducing the tackiness of the sealant surface and which may be at least partially removed so that the released surface of the structure adheres to a tire inner surface due to the inherent stickiness of the sealant can.

According to an advantageous embodiment of the invention, this cover is a foil or a paper. These have the advantage that they bring a low weight due to the flat dimensions and are easy to remove. Thus, handling up to and at the end user is particularly advantageous.

The film may in principle comprise any material, so that the cover has the described effect.

For example, it may be a silicone film.

As another example, the film comprises biaxially oriented polymers. These are obtained in particular by stretching the film both in the machine direction and in the transverse direction after the material has been extruded.

For example, the polymer is polypropylene. Biaxially oriented polypropylene films are known by the abbreviation BOPP and are commercially available.

The paper may in principle comprise any material so that the cover has the described effect.

According to exemplary and advantageous embodiments, coated paper, in particular coated kraft paper, may be used.

Kraft paper is known in the art and has compared to other papers a comparatively high strength and thus a special mechanical resistance.

The coating of the paper may in principle be any coating. For example, the paper may be coated with LDPE and / or LLDPE in a single or multi-layered construction.

LDPE is known in the art and stands for English. "Low density polyethylene", ie low density polyethylene. Instead of LDPE, the abbreviation PE-LD is also used.

LLDPE is known in the art and stands for English. "Linear low density polyethylene", ie low-density polyethylene with a linear structure. Instead of LLDPE, the abbreviation PE-LLD is used.

According to further exemplary and advantageous embodiments, the paper may be Teflon-coated paper. ("Teflonated paper").

For example, "FEP fluoroplastic film" (fluorinated ethylene propylene) or "PFA fluoroplastic film" (perfluoroalkoxyalkane) or "Tefzel® ETFE (ethylene tetrafluoroethylene) fluoroplastic films" from DuPont can be used.

The sealant may be any suitable sealant composition known to those skilled in the art, such as, for example, silicone based, or based on polyurethane, or based on crosslinking of a rubber and / or a polyolefin.

According to an advantageous and exemplary embodiment, the sealing means contains at least one rubber.

The rubber may be any of the types of rubber known to those skilled in the art. It is also conceivable a mixture of different rubbers.

According to a preferred embodiment of the invention, the rubber is natural rubber (NR) and / or butadiene rubber (BR) and / or isoprene rubber (IR) and / or styrene-butadiene rubber (SBR) and / or polychloroprene (CR) and / or butyl rubber (IIR) and / or bromobutyl rubber (BIIR) and / or chlorobutyl rubber (CIIR) and / or silicone rubber.

These types of rubbers are particularly well suited for the processing temperatures in the manufacture of the sealant and later in the application, especially in the pneumatic vehicle tire.

According to exemplary embodiments, the sealant may in particular contain natural and / or synthetic polyisoprene, preferably natural polyiosprene.

For example, solid natural rubber (NR) with liquid polyisoprene may be used in combination.

For example, the sealant may include natural rubber and styrene-butadiene rubber (SBR), for example, ESBR (emulsion-polymerized styrene-butadiene rubber). The crosslinking can be based on peroxides and / or on a sulfur crosslinking. For example, sulfur may be used in combination with peroxidic agents, such as "VAROX Organic Peroxide Crosslinking Agents", Vanderbilt Chemicals, LLC. The ratio of NR to ESBR is for example 30 to 40 to 60 to 70 wt .-%.

According to further exemplary embodiments, it is a silicone-based sealant.

According to an advantageous and exemplary embodiment, the sealant is based on the crosslinking of a rubber and / or polyolefin. For the rubber, the above statements apply.

It is clear to the person skilled in the art that all the constituents mentioned in the crosslinked sealant are present at least partially in chemically modified form, in particular as derivatives.

At least butyl rubber (IIR) is particularly preferably used. Butyl rubber is particularly suitable because it has a relatively high airtightness.

According to a particularly advantageous embodiment of the invention, the self-sealing tire sealant contains 40 to 80 wt .-%, particularly preferably 50 to 75 wt .-%, of at least one polyolefin. Hereby, an optimal flow behavior is achieved with a simultaneously good manufacturability (processability) of the sealant.

The at least one polyolefin preferably has a number average molecular weight distribution Mn according to GPC of 400 to 2500 g / mol, more preferably 800 to 2500 g / mol, most preferably 800 to 1600 g / mol, again preferably 1200 to 1600 g / mol, again particularly preferably 1200 to 1400 g / mol, for example 1300 g / mol.

A polyolefin with the mentioned ranges for the Mn is particularly suitable to produce the desired flowability with simultaneous sealing effect of the sealant in the event of a breakdown.

In this case, it is particularly preferred that the at least one polyolefin is at least one polybutene.

This adjusts the stickiness of the finished sealant and determines the flowability in the production process as well as the local stability of the finished sealant.

It may also be a mixture of two or more polybutenes each having a Mn from 400 to 2500 g / mol, wherein the polybutenes may differ in Mn. Suitable polybutenes, also called polyisobutenes, are available, for example, under the trade names Indopol® polybutenes from INEOS Capital Limited.

It is also a mixture of at least one polybutene conceivable with at least one other polyolefin.

Preferably, the sealant is based on crosslinking by at least one crosslinker selected from the group consisting, more preferably consisting of, polymethylol resin and divinylbenzene and quinones. The quinone is preferably a quinone dioxime, for example, dibenzoyl quinone dioxime or para-benzoquinone dioxime. Particularly preferred is para-benzoquinone dioxime.

Preferably, the sealant is based on crosslinking by at least one crosslinker in combination with a crosslinking initiator, wherein the crosslinking initiator is preferably selected from the group consisting of lead oxide and other metal oxides and peroxidic compounds. The crosslinking initiator is a chemical compound that initiates crosslinking of the sealant.

A peroxidic compound is a chemical compound containing at least one peroxide unit, that is, -O-O- (where O = oxygen). It is also possible to use several peroxides. The peroxide (s) are preferably selected from the group consisting of diaroyl peroxides, diacyl peroxides and peroxyesters.

The crosslinking initiator may be added as a pure substance or in a mixture. In the case of a mixture, for example of 50% by weight of dibenzoyl peroxide in dibutyl maleate, only the amount of peroxide contained is included in the amount of crosslinking initiator, so that accompanying substances such as dibutyl maleate are not included in the stated amounts of the at least one crosslinking initiator.

The sealant may further contain other ingredients, such as in particular further filler (s), tackifiers, plasticizers, such as. As oil (s), and optionally other additives, such as. As color pigments and / or zinc oxide and / or sulfur.

According to a preferred embodiment of the invention, the sealant also contains at least one filler, in particular at least one active filler.

The filler may be any of the fillers known to those skilled in the art, such as, in particular, reinforcing fillers, such as carbon black and / or silica, in particular precipitated silicas which are known and preferred as fillers for tire rubber blends.

Furthermore, further reinforcing and non-reinforcing fillers, in particular silica-based fillers, such as silicates or sand, are conceivable and optionally reinforcing fillers, such as graphite and graphene and so-called "carbon-silica dual-phase filing".

According to a preferred embodiment of the invention, the filler comprises at least one carbon black. This has the advantage that the cohesion of the adhesive is increased and the tackiness of the adhesive is lowered during the manufacturing process. At the same time, the site strength and the tearing properties of the adhesive are improved.

In the context of the present invention, all carbon black types known to those skilled in the art are conceivable as carbon blacks.

According to an advantageous embodiment of the invention, a carbon black is used which has an iodine adsorption number according to ASTM D 1510 of 20 to 180 g / kg, more preferably 30 to 140 g / kg, and a DBP number according to ASTM D 2414 of 30 to 200 ml / 100 g, preferably 90 to 180 ml / 100g, more preferably 110 to 180 ml / 100g. According to a further preferred embodiment of the invention, a carbon black of the type N326 is used.

It is also a mixture of two or more Russen conceivable.

According to a further preferred embodiment of the invention, the filler comprises at least one silica ("silica").

As a result, an optimal reinforcement of the adhesive is achieved and allows a good viscosity control and adjustment. In addition, with at least one silica, the cohesion of the adhesive is increased and the tackiness of the adhesive is lowered during the manufacturing process. At the same time, the site strength and the tearing properties of the adhesive are improved.

It is also conceivable a mixture of two or more silicas.

The silicas may be the silicas known to those skilled in the art which are suitable as a filler for tire rubber mixtures. As silicas can thus z. B. both those of the type Ultrasil® VN3 (trade name) from Evonik and silicas with a relatively low BET surface area (such as Zeosil® 1115 or Zeosil® 1085 from Solvay) as well as highly dispersible silicas, so-called HD silicas (eg Zeosil® 1165 MP from Solvay) can be used.

Further, a mixture of said fillers is conceivable and preferred, such as in particular at least one carbon black in combination with at least one silica, wherein also give the advantages mentioned.

The sealant contains according to advantageous embodiments, at least one tackifier, in particular for the case that the sealant does not already have sufficient tackiness due to the constituents contained, in particular the polymers. By "tackifier" is meant in principle any substance which increases the tackiness of the sealant.

According to advantageous embodiments of the invention, the tackifier is at least one hydrocarbon resin.

It is clear to the person skilled in the art that hydrocarbon resins are polymers which are composed of monomers, the hydrocarbon resin being formally constructed from derivatives of the monomers by linking the monomers to one another.

The term "hydrocarbon resins" in the context of the present application comprises resins which have carbon atoms and hydrogen atoms and, optionally, heteroatoms, in particular oxygen atoms, may have.

The hydrocarbon resin may be a homopolymer or a copolymer. Homopolymer is understood in the present application to mean a polymer which, according to Römpp Online (excerpt from 02.01.2017, last update of the August 2008 article), "has been formed from monomers of only one type".

For the purposes of the present invention, copolymer is understood as meaning a polymer which consists of several, i. two or more, different monomers is constructed. In the context of the present invention, the hydrocarbon resin can therefore be used e.g. also be a copolymer of three different monomers.

The monomers may be any of the monomers of hydrocarbon resins known to those skilled in the art, such as aliphatic monomers, in particular aliphatic C ₅ monomers, other unsaturated compounds which may be cationically polymerized, containing aromatics and / or terpenes and / or alkenes and / or cycloalkenes. In particular, preferred monomers are C ₅ and C ₉ monomers.

The aromatics (aromatic monomers) may be, for example, alpha-methylstyrene and / or styrene and / or vinyltoluene and / or indene and / or coumarone and / or methylindene and / or methylcumarone and / or phenol.

The aromatic monomers are preferably alpha-methylstyrene and / or styrene and / or vinyltoluene and / or indene and / or coumarone and / or methylindene and / or methylcumarone.

According to Römpp Online, the term "olefins" is the "group name for acyclic and cyclic aliphatic hydrocarbons having one or more reactive C =C double bonds in the molecule, which are better known today as alkenes or cycloalkenes, in a broader sense also designation of their substituted Derivatives .... "In the context of the present invention, therefore, unsaturated terpenes, alkenes and cycloalkenes are combined under the generic term olefins.

The alkenes may be, for example, 1-butene and / or 2-butene and / or butadiene.

According to a preferred embodiment of the invention, the hydrocarbon resin is at least one aliphatic resin, ie a resin which does not contain any aromatic ring systems. Such a resin consists of 100% by weight of aliphatic monomers or their derivatives.

According to a further embodiment of the invention, the resin is from 10 to 99 wt .-%, preferably 50 to 99 wt .-%, particularly preferably 70 to 99 wt .-%, of aliphatic and 1 to 90 wt .-%, preferably 1 to 50 wt .-%, particularly preferably 1 to 30 wt .-% of aromatic monomers.

According to a preferred embodiment of the invention, the hydrocarbon resin is at least one resin which is composed of at least Cs monomers and is known to the person skilled in the art as so-called Cs resin. Hereby, particularly good properties of the adhesive, in particular an optimized flow behavior with good tackiness, are achieved.

The aliphatic Cs monomers may be monomers of the Cs petroleum fraction, for example isoprene, and / or monomers of terpenes and / or cycloolefins and / or olefins, such as pentene. By C ₅ is meant that these monomers are composed of five carbon atoms.

Furthermore, it is known to those skilled in the art that the Cs petroleum fraction except aliphatic monomers having five carbon atoms other aliphatic monomers (building blocks) with eg four, ie C ₄ monomers, or six carbon atoms, C ₆ monomers may contain.

According to advantageous embodiments of the invention, the sealant contains 2 to 20 wt .-% of at least one hydrocarbon resin as a tackifier. Preferably, the amount of the at least one hydrocarbon resin is 2 to 10 wt .-%.

With such preferred and particularly preferred amounts, the tack and viscosity of the adhesive are further optimized.

• - 20 bis 75 Gew.-% wenigstes eines Polyolefins, bevorzugt wenigstens eines Polybutens, und
• - 2,0 bis 20 Gew.-% wenigstens eines Klebrigmachers und
• - 9,0 bis 45 Gew.-% wenigstens eines Kautschuks und
• - 1,0 bis 30 Gew.-% wenigstens eines Füllstoffs und
• - 0,4 bis 0,8 Gew.-% wenigstens eines Vernetzers und
• - 0,5 bis 1,2 Gew.-% wenigstens eines Vernetzungsinitiators.

According to advantageous embodiments of the invention, the sealant contains the following constituents in the following quantities:

• - 20 to 75 wt .-% least of a polyolefin, preferably at least one polybutene, and
• - 2.0 to 20 wt .-% of at least one tackifier and
• - 9.0 to 45 wt .-% of at least one rubber and
• - 1.0 to 30 wt .-% of at least one filler and
• 0.4 to 0.8% by weight of at least one crosslinker and
• - 0.5 to 1.2 wt .-% of at least one crosslinking initiator.

The percentages by weight are based on the total amount of sealant.

The sealant composition may be prepared by known methods and apparatuses, particularly by intensive mixing in a mixer or extruder, especially a twin screw extruder.

The production of the structure according to the invention is carried out by providing the mixed sealant in a depending on the shape of the structure suitable "pre-form", such as extruded or calendered tape in the case of a roll. As described above, the variable width tape can be cut to different lengths to obtain different sized rolls for different sized tires.

In the provision of the "pre-form", that is, for example, the band, already a part of the surface can be provided with the cover. For example, the sealant composition can be extruded as a quasi-endless belt onto a quasi-endless belt of film or paper. After being cut to length and rolled up, the radially outwardly directed surface of the roll is protected by the cover.

In this way, the sealant can also be provided from both sides with a foil or a paper. Here, the sealant example meadow is extruded onto a quasi-endless belt of a film or paper and at the same time the upward surface of the sealant is provided with a quasi-endless belt of a film or paper.

• 1a zeigt schematisch ein Gebilde eines Dichtmittels 1. Das Gebilde weist zumindest eine Oberfläche 2 auf. Das Gebilde kann jegliche geometrische Form annehmen.
• 1b zeigt schematisch ein einfaches erfindungsgemäßes Beispiel des Gebildes 1 mit einer klebrigkeitsreduzierenden Bedeckung 3 an einer Oberfläche 2.
• 2 zeigt schematisch ein vorteilhaftes erfindungsgemäßes Beispiel eines Gebildes 1. Das Gebilde ist in 2 eine Rolle 4. Hierbei ist die nach radial außen gerichtete Oberfläche 5 des Dichtmittels der Rolle mit der klebrigkeitsreduzierenden Bedeckung 3 versehen. Die Rolle 4 ist insbesondere dadurch erhalten, dass wie oben beschrieben ein Band eines Dichtmittels, welches mit einer klebrigkeitsreduzierenden Bedeckung 3 versehen ist, zu einer Rolle aufgerollt wird, und zwar derart, dass die klebrigkeitsreduzierende Bedeckung 3 nach außen gerichtet ist.
• 3 zeigt schematisch ein weiteres einfaches erfindungsgemäßes Beispiel des Gebildes 1 mit einer klebrigkeitsreduzierenden Bedeckung 3 auf zwei unterschiedlichen Oberflächen 2.
• 4 zeigt schematisch ein weiteres vorteilhaftes erfindungsgemäßes Beispiel eines Gebildes 1. Das Gebilde ist in 4 ebenfalls eine Rolle 4. Hierbei sind sowohl die nach radial außen gerichtete Oberfläche 5 als auch die nach radial innen gerichtete Oberfläche 6 des Dichtmittels der Rolle mit der klebrigkeitsreduzierenden Bedeckung 3 versehen.

The invention will now be described with reference to the 1a to 4 be explained.

• 1a schematically shows a structure of a sealant 1 , The structure has at least one surface 2 on. The structure can assume any geometric form.
• 1b schematically shows a simple inventive example of the structure 1 with a tackiness-reducing coverage 3 on a surface 2 ,
• 2 schematically shows an advantageous inventive example of a structure 1 , The structure is in 2 a role 4 , Here is the radially outward surface 5 the sealant of the roll with the tackiness-reducing covering 3 Mistake. The role 4 is obtained in particular that, as described above, a band of a sealant, which with a tackiness-reducing cover 3 is rolled up into a roll in such a way that the tackiness-reducing cover 3 directed to the outside.
• 3 schematically shows another simple inventive example of the structure 1 with a tackiness-reducing coverage 3 on two different surfaces 2 ,
• 4 schematically shows a further advantageous inventive example of a structure 1 , The structure is in 4 also a role 4 , Here are both the radially outward surface 5 as well as the radially inwardly directed surface 6 the sealant of the roll with the tackiness-reducing covering 3 Mistake.

The sealant has, for example, a layer thickness DS from 3 to 5, in particular 3.5 mm. The cover has, for example, a layer thickness DB of 0.1 mm. The roller has, for example, an axial width of 40 to 120 mm.

LIST OF REFERENCE NUMBERS

1

Gebilde eines Dichtmittels

2

Oberfläche des Gebildes

3

klebrigkeitsreduzierende Bedeckung

4

Rolle (aufgerolltes Band) als Beispiel eines Gebildes

5

Radial nach außen gerichtete Oberfläche

6

Radial nach innen gerichtete Oberfläche

DS

Schichtdicke des Dichtmittels

DB

Schichtdicke der Bedeckung

rR

radiale Richtung

aR

axiale Richtung

UR

Umfangsrichtung

(Part of the description)

1

Structure of a sealant

2

Surface of the structure

3

Tack-reducing coverage

4

Roll (rolled up tape) as an example of a structure

5

Radially outward facing surface

6

Radially inward surface

DS

Layer thickness of the sealant

DB

Layer thickness of the covering

rR

radial direction

aR

axial direction

UR

circumferentially

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006059286 A1 [0002]

Claims (11)

Structure (1) of an automatically sealing tire sealant, which on at least one surface (2) has a tackiness-reducing covering (3). Structures after Claim 1 , characterized in that it has the form of a roller (4). Structures after Claim 2 , characterized in that the sealing means of the roller (4) at least on the radially outwardly directed surface (5) has at least one tackiness-reducing cover (3). Structures after Claim 2 , characterized in that the sealing means of the roller (4) at least on the radially inwardly directed surface (5) has at least one tackiness-reducing covering (3). Structures after Claim 2 , characterized in that the sealing means of the roller (4) at least on the radially inwardly and on the radially outwardly directed surface (5) has at least one tackiness-reducing cover (3). Structure according to one of the preceding claims, characterized in that the at least one tackiness-reducing covering (3) is a film or a paper. Structure according to one of the preceding claims, characterized in that the self-sealing tire sealant contains at least one rubber. Structure according to one of the preceding claims, characterized in that the self-sealing tire sealant is based on the crosslinking of a rubber and / or polyolefin. Structure according to one of the preceding claims, characterized in that the self-sealing tire sealant contains at least one natural polyisoprene. Structure according to one of the preceding claims, characterized in that the self-sealing tire sealant is a silicone-based sealant. Structure according to one of the preceding claims, characterized in that the self-sealing tire sealant contains at least one polyurethane.

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