DE102022213983A1 - Vulcanizable rubber compound, vulcanizate and rubber product - Google Patents

Abstract

The invention relates to a vulcanizable rubber mixture comprising a) diene rubbers, b) silicas, c) specific polyetheramines, in a combined mass fraction in the range of 0.1 to 10 phr, and d) one or more rubber regenerates.

Description

The invention relates to a vulcanizable rubber mixture, a vulcanizate that can be produced therefrom and a rubber product containing this vulcanizate, in particular a pneumatic vehicle tire.

The automotive industry is one of the industries that has been confronted with fundamental challenges since the beginning of the 21st century and has been shaped by numerous technological innovations at the same time. Growing customer awareness of ecological aspects such as emissions profiles or resource efficiency requires new concepts for mobility. At the same time, the demand for improved vehicle performance characteristics and the requirements in terms of driving safety are increasing. Meeting these challenges is not just a task for the actual vehicle manufacturers. In practice, many of these aspects are strongly influenced by the properties of the vehicle tires, so optimizing tire properties is an important field of innovation.

A key component in optimizing the properties of vehicle tires and other rubber products, such as belts, straps and hoses, are the vulcanizable rubber compounds used in their production and the rubber materials obtained through vulcanization. Several relevant properties of pneumatic vehicle tires, e.g. wet grip, rolling resistance and abrasion behavior, are closely linked to the composition of the rubber material of the tread. Therefore, many research efforts focus on optimizing the properties of the rubber compositions used, which are regularly subject to very high requirements. There are conflicting objectives with regard to numerous properties in vehicle tires, so that these cannot be optimized independently of one another and an improvement in one parameter can lead to a deterioration in another parameter.

In recent decades, significant progress has been made in the field of composition development. One key innovation was the at least partial replacement of carbon black fillers with silicon-containing compounds, in particular silicon dioxide compounds, such as fumed silica or precipitated silica.

In the EP2725059A1 It is disclosed that the combination of polyetheramines and silica can produce advantageous rubber mixtures that have an improved performance level in terms of abrasion behavior and the conflicting objectives of rolling resistance versus wet grip. It was also found that improved processing properties can be obtained in corresponding rubber mixtures. Further information on the technological background of polyetheramines can be found, for example, in the WO 2013/092526 A1 , the US 2008/033082 A1 and the WO 2016/030469 A1 disclosed.

Even though the vulcanizable rubber mixtures known from the state of the art can achieve advantageous results in many respects, the corresponding compositions or the vulcanizates that can be produced therefrom are in many cases still considered to be in need of improvement with regard to application-relevant properties, in particular in order to meet the requirements of modern pneumatic vehicle tires for high-performance applications.

The primary object of the present invention was to eliminate or at least reduce the disadvantages of the prior art and to provide an advantageous vulcanizable rubber mixture and a corresponding vulcanizate that can be produced therefrom and has an advantageous property profile.

In particular, it was the object of the present invention to provide a vulcanizable rubber mixture with excellent processing properties, it being a desirable requirement that the need for potentially health and/or environmentally harmful compounds, in particular guanidine accelerators, can be reduced.

In addition, it was an object of the present invention to provide a vulcanizable rubber mixture and corresponding vulcanizates that can be produced therefrom, which have excellent rolling properties, in particular an advantageous rolling resistance.

Furthermore, it was an object of the present invention to provide a vulcanizable rubber mixture and corresponding vulcanizates that can be produced therefrom, which have excellent mechanical properties, in particular with regard to improved tear properties.

In addition, it was an object of the present invention that the vulcanizable rubber mixtures to be specified should be able to be produced more sustainably so that the need for fossil raw materials could be reduced.

In particular, it was an object of the present invention to resolve existing conflicting objectives between the processing properties, the mechanical properties and the rolling properties in the best possible way.

It was an additional object of the present invention that the vulcanizable rubber mixtures and vulcanizates to be specified should be producible as far as possible using production processes and materials that are already used today in the field of rubber processing.

It was a further object of the present invention to provide a corresponding rubber product which comprises the vulcanizate to be specified, in particular a pneumatic vehicle tire with advantageous properties.

The inventors of the present invention have now found that the objects described above can surprisingly be achieved in vulcanizable rubber mixtures which, in addition to diene rubber and silica, additionally comprise certain mass fractions of specific polyetheramines and one or more rubber regenerates, as defined in the claims.

The above-mentioned objects are achieved accordingly by the subject matter of the invention as defined in the claims. Preferred embodiments of the invention emerge from the subclaims and the following statements.

Such embodiments, which are referred to below as preferred, are combined in particularly preferred embodiments with features of other embodiments referred to as preferred. Combinations of two or more of the embodiments referred to below as particularly preferred are therefore particularly preferred. Also preferred are embodiments in which a feature of an embodiment referred to as preferred to some extent is combined with one or more further features of other embodiments referred to as preferred to some extent. Features of preferred vulcanizates, rubber products and uses arise from the features of preferred vulcanizable rubber mixtures.

Insofar as both specific amounts or proportions of this mixture component and preferred embodiments of the mixture component are disclosed below for a mixture component, for example for the diene rubbers or the polyetheramines, the specific amounts or proportions of the preferably configured mixture components are also disclosed in particular. In addition, it is disclosed that with the corresponding specific total amounts or total proportions of the mixture components, at least some of the mixture components can be preferably configured and in particular also that preferably configured mixture components can in turn be present in the specific amounts or proportions within the specific total amounts or total proportions.

1. a) einen oder mehrere Dienkautschuke,
2. b) einen oder mehrere Füllstoffe, die ausgewählt sind aus der Gruppe bestehend aus Kieselsäuren,
3. c) ein oder mehrere Polyetheramine, in einem kombinierten Massenanteil im Bereich von 0,1 bis 10 phr, wobei die Polyetheramine ausgewählt sind aus der Gruppe bestehend aus Polyetheraminen der Formel I): R¹R²N-(R⁵)_m-X-R⁶-NR³R⁴, I) wobei R¹, R², R³ und R⁴ unabhängig voneinander Wasserstoff oder entweder verzweigte oder unverzweigte Kohlenwasserstoffreste mit 1 bis 10 C-Atomen sind, wobei m 0 oder 1 ist, wobei R⁵ und R⁶ unabhängig voneinander entweder verzweigte oder unverzweigte Kohlenwasserstoffketten mit 1 bis 10 C-Atomen sind, wobei X eine Polyetherkette der Formel II): - (CHR⁷ⁱ-CHR⁸ⁱ-O)_x- II) ist, wobei x im Bereich von 2 bis 30 liegt, wobei R⁷ⁱ und R⁸ⁱ in jeder Monomereinheit i jeweils unabhängig voneinander und unabhängig von den anderen Monomereinheiten der Polyetherkette Wasserstoff oder Kohlenwasserstoffreste mit 1 oder 2 C-Atomen sind, und
4. d) ein oder mehrere Kautschukregenerate.

The invention relates to a vulcanizable rubber mixture comprising:

1. (a) one or more diene rubbers,
2. b) one or more fillers selected from the group consisting of silicas,
3. c) one or more polyetheramines, in a combined mass fraction in the range of 0.1 to 10 phr, wherein the polyetheramines are selected from the group consisting of polyetheramines of the formula I): R ¹ R ² N-(R ⁵ ) _m -XR ⁶ -NR ³ R ⁴ , I) where R ¹ , R ² , R ³ and R ⁴ are independently hydrogen or either branched or unbranched hydrocarbon radicals having 1 to 10 C atoms, where m is 0 or 1, where R ⁵ and R ⁶ are independently either branched or unbranched hydrocarbon chains having 1 to 10 C atoms, where X is a polyether chain of the formula II): - (CHR ⁷ⁱ -CHR ⁸ⁱ -O) _x - II) where x is in the range from 2 to 30, where R ⁷ⁱ and R ⁸ⁱ in each monomer unit i are each independently of one another and independently of the other monomer units of the polyether chain, hydrogen or hydrocarbon radicals having 1 or 2 C atoms, and
4. d) one or more reclaimed rubbers.

Vulcanizable rubber mixtures per se and their typical components as well as customary production processes for obtaining corresponding vulcanizable rubber mixtures, in particular by mixing the components, are comprehensively known to the person skilled in the art in the field of rubber processing.

In accordance with standard practice, the components of the vulcanizable rubber compound defined above are each used as "one or more". The term "one or more" refers, in accordance with industry practice, to the chemical nature of the respective compounds and not to their amount. For example, the vulcanizable rubber compound may comprise exclusively SBR as a diene rubber, which would mean that the vulcanizable rubber compound comprises a plurality of the respective molecules.

Insofar as mass fractions are specified below, these are in many cases specified as combined mass fractions of one or more components, in accordance with industry practice, thereby expressing that the mass fraction of the correspondingly designed components taken together meets the corresponding criteria.

The phr (parts per hundred parts of rubber by weight) specification used here is the quantity specification commonly used in the rubber industry for mixture recipes, which is used to specify the mass fractions of the components in the rubber mixture based on the mass of the high molecular weight rubbers present in the rubber mixture (weight average molar mass Mw according to GPC greater than 60,000 g/mol), whereby the combined mass fraction of these high molecular weight rubbers in the rubber mixture corresponds to 100 phr. The phf (parts per hundred parts of filler by weight) specification is analogous to the quantity specification commonly used in the rubber industry for mixture recipes, in particular for coupling agents for fillers, based on the mass of the fillers present in the rubber mixture. In the context of the present invention, the phf specification refers only to the silicas present in the vulcanizable rubber mixture, the combined mass fraction of which corresponds to 100 phf, so that other fillers that may be present, such as carbon black, are not included in the calculation of the phf.

The vulcanizable rubber mixture according to the invention comprises at least one diene rubber. In accordance with the expert understanding, diene rubbers are rubbers that are obtained by (co)polymerization of dienes and/or cycloalkenes and thus have C=C double bonds either in the main chain or in the side groups. It can be seen as an advantage of the vulcanizable rubber mixture according to the invention that it is very flexible with regard to the diene rubbers to be used, so that in principle all diene rubbers customary in the industry can be used. In the opinion of the inventors, however, a vulcanizable rubber mixture according to the invention is preferred, wherein the one or more diene rubbers are selected from the group consisting of natural polyisoprene, synthetic polyisoprene, epoxidized polyisoprene, butadiene rubber, solution-polymerized styrene-butadiene rubber, emulsion-polymerized styrene-butadiene rubber, polynorbornene, ethylene-propylene-diene rubber, nitrile rubber, acrylate rubber, styrene-isoprene-butadiene terpolymer, butyl rubber and halobutyl rubber, wherein the one or more diene rubbers are preferably selected from the group consisting of natural polyisoprene (NR), synthetic polyisoprene (IR), butadiene rubber (BR), solution-polymerized styrene-butadiene rubber (SSBR) and emulsion-polymerized styrene-butadiene rubber (ESBR), wherein the one or more diene rubbers are particularly preferably selected from the group consisting of solution-polymerized styrene-butadiene rubber and emulsion-polymerized styrene-butadiene rubber. In this respect, additionally or alternatively, a vulcanizable rubber mixture according to the invention is also preferred, wherein at least one of the diene rubbers, preferably all of the one or more diene rubbers, is an end-group-modified and/or chain-modified diene rubber, preferably an end-group-modified diene rubber. The modification may be one or more functional groups selected from the group consisting of hydroxy groups, ethoxy groups, epoxy groups, siloxane groups, amino groups, aminosiloxane groups, carboxy groups, phthalocyanine groups and silane sulfide groups.

SBR, BR and IR or NR in particular have proven to be suitable diene rubbers for obtaining vulcanizable rubber compounds that can be converted into particularly high-performance vulcanizates by vulcanization.

Thus, firstly, preference is given to a vulcanizable rubber mixture according to the invention, wherein the vulcanizable rubber mixture comprises styrene-butadiene rubber, preferably solution-polymerized styrene-butadiene rubber, as diene rubber, preferably in a mass fraction in the range from 50 to 98 phr, particularly preferably in the range from 55 to 96 phr, very particularly preferably in the range from 60 to 90 phr.

Additionally or alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises butadiene rubber as diene rubber, preferably in a mass fraction in the range from 1 to 35 phr, particularly preferably in the range from 2 to 30 phr, very particularly preferably in the range from 5 to 25 phr. The butadiene rubber can, for example, be so-called high-cis or low-cis types, wherein polybutadiene with a mass-related cis content of 90% or more is referred to as high-cis type.

In addition or as an alternative, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises natural polyisoprene and/or synthetic polyisoprene, preferably natural polyisoprene, as diene rubber, preferably in a combined mass fraction in the range from 1 to 30 phr, particularly preferably in the range from 2 to 20 phr, very particularly preferably in the range from 5 to 15 phr. However, particularly for applications for truck tires, mass fractions in the range from 60 to 100 phr, preferably 60 to 80 phr, are also conceivable. The natural and/or synthetic polyisoprene can be either cis-1,4-polyisoprene or 3,4-polyisoprene. However, the use of cis-1,4-polyisoprenes is preferred, in particular with a mass fraction of cis-1,4 of 90% or more.

In order to optimally adapt the physical-chemical or mechanical properties of the vulcanizates that can be produced to the respective application requirements, it has proven advantageous to mix two or more diene rubbers with one another. Accordingly, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises two or more, preferably three or more, different diene rubbers as diene rubber, wherein the vulcanizable rubber mixture particularly preferably comprises SBR and NR and/or BR, very particularly preferably SBR, NR and BR.

Additionally or alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the diene rubber(s) has a weight-average molar mass Mw, measured by GPC, in the range from 150,000 to 5,000,000 g/mol, preferably in the range from 250,000 to 2,500,000, particularly preferably in the range from 300,000 to 1,500,000. The number-average or weight-average molar mass is determined in the context of the present invention by means of gel permeation chromatography according to DIN55672-1: 2016-03 (GPC with tetrahydrofuran as eluent, polystyrene standard; size exclusion chromatography; SEC).

The vulcanizable rubber mixture according to the invention comprises one or more fillers selected from the group consisting of silicas. In the context of the present invention, the term "silica" commonly used in the industry is used, with the corresponding compounds sometimes also being referred to as "silica" in reference to the English term. For the person skilled in the art in the rubber processing industry, this historically determined term refers to amorphous, i.e. non-crystalline, silicon dioxide, in particular so-called pyrogenic silicon dioxide and precipitated silicon dioxide. In other words, it is a vulcanizable rubber mixture according to the invention, comprising one or more fillers selected from the group consisting of pyrogenic silicon dioxide and precipitated silicon dioxide, particularly preferably precipitated silicon dioxide.

In principle, a vulcanizable rubber mixture according to the invention is preferred, wherein the one or more fillers have a nitrogen surface area (BET surface area) according to ISO 9277:2014-01 in the range from 35 to 400 m ² /g, preferably in the range from 35 to 350 m ² /g, particularly preferably in the range from 85 to 320 m ² /g, very particularly preferably in the range from 120 to 235 m ² /g. Additionally or alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the one or more fillers have a CTAB surface area according to ASTM D 3765-03 in the range from 30 to 400 m ² /g, preferably in the range of 30 to 330 m ² /g, particularly preferably in the range of 80 to 300 m ² /g, very particularly preferably in the range of 115 to 200 m ² /g.

With regard to the amounts of filler that can be used, the inventors have found that the vulcanizable rubber mixtures according to the invention advantageously show excellent results even for high filler contents. In the opinion of the inventors, the solution identified within the scope of the present invention shows the greatest advantages, however, particularly at medium filler contents. Accordingly, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises the one or more fillers in a combined mass fraction in the range from 5 to 250 phr, preferably in the range from 20 to 180 phr, particularly preferably in the range from 30 to 140 phr, very particularly preferably in the range from 40 to 110 phr.

In addition to the silicas to be used according to the invention, further fillers can also be present, which makes it possible to specifically adapt the properties of the vulcanizable rubber mixture. A vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises one or more further fillers selected from the group consisting of carbon black, aluminum hydroxide, titanium dioxide, magnesium oxide and layered silicates, wherein the combined mass fraction of the further fillers is preferably in the range from 0.1 to 100 phr, particularly preferably in the range from 0.5 to 50 phr. The carbon black used is preferably a carbon black which has an iodine adsorption number according to ASTM D 1510 of 30 to 250 g/kg, preferably 30 to 180 g/kg, particularly preferably 40 to 130 g/kg, and a DBP number according to ASTM D 2414 of 30 to 200 ml/100 g, preferably 70 to 200 ml/100g, particularly preferably 90 to 200 ml/100g.

The vulcanizable rubber mixture according to the invention comprises at least one polyetheramine of a specific structure. Polyetheramines are generally known to the person skilled in the art. They are polyether polyols whose terminal hydroxy groups have been converted to amino groups in an amination reaction, so that polyamines are obtained. In the case of the amination of the particularly preferred linear, i.e. unbranched, polyetherdiols, the polyetheramines are accordingly diamines of a polyalkylene glycol. The underlying polyetherdiols are preferably produced from alkylene oxides, for example butylene oxide, ethylene oxide or propylene oxide. Polyetheramines are commercially available, in particular from Huntsman, for example under the trade names Jeffamine D-230, ED-600, ED-900 or EDR-148.

The polyetheramine to be used according to the invention is selected from the group consisting of polyetheramines of the formula I): R ¹ R ² N-(R ⁵ ) _m -XR ⁶ -NR ³ R ⁴ , I)
wherein R ¹ , R ² , R ³ and R ⁴ are independently hydrogen or either branched or unbranched hydrocarbon radicals having 1 to 10 C atoms, wherein m is 0 or 1, wherein R ⁵ and R ⁶ are independently either branched or unbranched hydrocarbon chains having 1 to 10 C atoms,
where X is a polyether chain of formula II): -(CHR ⁷ⁱ -CHR ⁸ⁱ -O) _x - II)
where x is in the range from 2 to 30, where R ⁷ⁱ and R ⁸ⁱ in each monomer unit i are each independently of one another and independently of the other monomer units of the polyether chain, hydrogen or hydrocarbon radicals having 1 or 2 C atoms,

The organic radicals R ¹ , R ² , R ³ and R ⁴ define the radicals of the amino groups of the diamine and result during production in particular from the substances used for the amination reaction. In accordance with the understanding of the person skilled in the art, these radicals are in principle independent of one another, which means that, for example, R ¹ can be hydrogen even if R ² is a hydrocarbon radical. In this respect, a vulcanizable rubber mixture according to the invention is preferred, wherein R ¹ , R ² , R ³ and R ⁴ are independently hydrogen or either branched or unbranched, preferably unbranched, hydrocarbon radicals with 1 to 5 C atoms, preferably with 2 to 5 C atoms. A vulcanizable rubber mixture according to the invention is particularly preferred, wherein at least one of the radicals R ¹ and R ² and/or one of the radicals R ³ and R ⁴ is hydrogen. Very particular preference is given to a vulcanizable rubber mixture according to the invention, wherein the radicals R ¹ and R ³ and/or the radicals R ² and R ⁴ are identical. A vulcanizable rubber mixture according to the invention is particularly preferred, wherein the radicals R ¹ , R ² , R ³ and R ⁴ are hydrogen.

One of the amino groups can be attached to the polyether chain X either directly (m = 0) or via a hydrocarbon chain (m = 1). Due to the production from alkylene oxides, in preferred polyetheramines one of the amino groups is attached directly to the polyether chain X (m = 0), whereas the other amino group is attached via a hydrocarbon chain R ⁶ , which would ultimately be the last building block of the polyether chain, but which, as a result of the amination, no longer has an oxygen atom and accordingly can no longer be assigned to the polyether chain X. Preference is therefore initially given to a vulcanizable rubber mixture according to the invention, where R ⁵ and R ⁶ are independently of one another either branched or unbranched hydrocarbon chains with 1 to 5 C atoms, preferably with 2 or 3 C atoms. Particularly preferred in this respect is a vulcanizable rubber mixture according to the invention, where m = 0, where R ⁶ is preferably either a branched or unbranched hydrocarbon chain with 2 or 3 C atoms, particularly preferably a branched or unbranched hydrocarbon chain with 3 C atoms.

The polyether chain X comprises x repeat units. A vulcanizable rubber mixture according to the invention is preferred, where x is in the range from 2 to 15.

In each structural unit of the polyether chain X, i.e. in the various monomer units, which are identified here via the serial number i, which runs accordingly from i = 1 to i = x, R ⁷ⁱ and R ⁸ⁱ are fundamentally independent of one another, namely both R ⁷ⁱ and R ⁸ⁱ in each monomer unit and all R ⁷ⁱ or all R ⁸ⁱ in the polyether chain. Due to the fundamental advantage of comparatively short-chain alkylene oxides, a vulcanizable rubber mixture according to the invention is preferred, where R ⁷ⁱ and R ⁸ⁱ in each monomer unit i are each hydrogen or methyl groups independently of one another and independently of the other monomer units of the polyether chain. A vulcanizable rubber mixture according to the invention is particularly preferred, where in each monomer unit i at least one of the radicals R ⁷ⁱ and R ⁸ⁱ is hydrogen.

The person skilled in the art will understand that the nature of the radicals R ⁷ⁱ and R ⁸ⁱ depends in particular on the chemical nature of the compounds used in the preparation, in particular the alkylene oxides used, whereby more complex polyetheramines can be obtained in particular when different alkylene oxides are mixed with one another during the preparation.

According to the inventors, a vulcanizable rubber mixture according to the invention is preferred, wherein the polyether chain comprises one or more first monomer units i1 of the formula IV): -(CHR ⁷ⁱ -CH ₂ -O)-, IV)
wherein R ⁷ⁱ is preferably identical for all first monomer units i ₁ , wherein R ⁷ⁱ is particularly preferably a methyl group for all first monomer units i ₁ , and/or
wherein the polyether chain comprises one or more second monomer units i ₂ of the formula V): -(CH ₂ -CH ₂ -O)-, V)
and or
wherein the polyether chain comprises one or more third monomer units i ₃ of the formula VI): -(CH ₂ -CHR ⁸ⁱ -O)-, VI)
wherein R ⁸ⁱ is preferably identical for all third monomer units i ₃ , wherein R ⁸ⁱ is particularly preferably a methyl group for all third monomer units i ₃ , wherein the polyether chain preferably consists of these monomer units.

With regard to these monomer units, preference is generally given to vulcanizable rubber mixtures according to the invention, wherein the number of first monomer units i ₁ in the polyether chain x ₁ is in the range from 1 to 7, preferably in the range from 2 to 6, particularly preferably in the range from 2 to 5, and/or wherein the number of second monomer units i ₂ in the polyether chain x ₂ is in the range from 1 to 15, preferably in the range from 2 to 12, particularly preferably in the range from 3 to 10, and/or wherein the Number of third monomer units i ₃ in the polyether chain x ₃ is in the range from 1 to 7, preferably in the range from 2 to 6, particularly preferably in the range from 2 to 5. Particularly preferred in this respect is a vulcanizable rubber mixture according to the invention, wherein the combined number of first monomer units i ₁ and third monomer units i ₃ in the polyether chain x _1/3 is in the range from 2 to 10, preferably in the range from 3 to 7.

In this respect, very particular preference is given to a vulcanizable rubber mixture according to the invention, wherein the polyether chain preferably consists of more than 50%, particularly preferably more than 75%, particularly preferably essentially completely, of first monomer units i ₁ , wherein the number of first monomer units i ₁ in the polyether chain x ₁ is in the range from 1 to 5, preferably in the range from 2 to 4. Corresponding polyetheramines are commercially available, for example, under the trade name Jeffamine D-230, wherein x ₁ is about 2.5.

Additionally or alternatively, a vulcanizable rubber mixture according to the invention with mixed polyether chains is particularly preferred, ie where the polyether chain comprises two or more, preferably three or more, monomer units selected from the group consisting of first monomer units i ₁ , second monomer units i ₂ and third monomer units i ₃ , where the polyether chain preferably consists of these monomer units. Vulcanizable rubber mixtures according to the invention are relevant for most applications, where the two or more monomer units are distributed at least partially randomly, preferably completely randomly, in the polyether chain.

For mixed polyether chains, a vulcanizable rubber mixture according to the invention is particularly preferred, wherein the combined number of the first monomer units i ₁ and the third monomer units i ₃ in the polyether chain x _1/3 is in the range from 2 to 5 and wherein the number of the second monomer units i ₂ in the polyether chain x ₂ is in the range from 7 to 12. Corresponding polyetheramines are commercially available, for example, under the trade name Jeffamine ED-600, wherein x ₂ is about 9 and x _1/3 is about 3.6.

For mixed polyether chains, additionally or alternatively, a vulcanizable rubber mixture according to the invention is particularly preferred, wherein the combined number of the first monomer units i ₁ and the third monomer units i ₃ in the polyether chain x _1/3 is in the range from 4 to 8, and wherein the number of the second monomer units i ₂ in the polyether chain x ₂ is in the range from 10 to 15. Corresponding polyetheramines are commercially available, for example, under the trade name Jeffamine ED-900, wherein x ₂ is about 12.5 and x _1/3 is about 6.

The inventors consider the use of polyetheramines, typical representatives of which are the commercial products Jeffamine D-230 and ED-600, to be particularly preferred for solving the problem.

• - Polyetheraminen der Formel VII): H₂N-(CH(CH₃)-CH₂-O)_x1-CH₂CH(CH₃)-NH₂, VII) wobei x₁ im Bereich von 2 bis 6, bevorzugt im Bereich von 2 bis 5, besonders bevorzugt im Bereich von 2 bis 4, ganz besonders bevorzugt im Bereich von 2 bis 3, liegt, und
• - Polyetheraminen der Formel VIII): H₂N-X-CH₂CH(CH₃)-NH₂, VIII) wobei X eine Polyetherkette ist, die aus zwei oder mehr Monomereinheiten besteht, die ausgewählt sind aus der Gruppe bestehend aus ersten Monomereinheiten i_1b der Formel IV_b): -(CH(CH₃)-CH₂-O)-, IVb) zweiten Monomereinheiten i_2b der Formel V_b): -(CH₂-CH₂-O)-, Vb) und dritten Monomereinheiten i_3b der Formel VI_b): -(CH₂-CH(CH₃)-O)-, VIb) wobei die kombinierte Zahl der ersten Monomereinheiten i_1b und der dritten Monomereinheiten i_3b in der Polyetherkette x_1b/3b im Bereich von 2 bis 5 liegt, wobei die Zahl der zweiten Monomereinheiten i_2b in der Polyetherkette x_2b im Bereich von 8 bis 10 liegt.

Accordingly, a vulcanizable rubber mixture according to the invention is particularly preferred, wherein the one or more polyetheramines are selected from the group consisting of:

• - Polyetheramines of formula VII): H ₂ N-(CH(CH ₃ )-CH ₂ -O) _x1 -CH ₂ CH(CH ₃ )-NH ₂ , VII) where x ₁ is in the range from 2 to 6, preferably in the range from 2 to 5, particularly preferably in the range from 2 to 4, very particularly preferably in the range from 2 to 3, and
• - Polyetheramines of formula VIII): H ₂ NX-CH ₂ CH(CH ₃ )-NH ₂ , VIII) where X is a polyether chain consisting of two or more monomer units selected from the group consisting of first monomer units i _1b of formula IV _b ): -(CH(CH ₃ )-CH ₂ -O)-, IVb) second monomer units i _2b of the formula V _b ): -(CH ₂ -CH ₂ -O)-, Vb) and third monomer units i _3b of the formula VI _b ): -(CH ₂ -CH(CH ₃ )-O)-, VIb) wherein the combined number of the first monomer units i _1b and the third monomer units i _3b in the polyether chain x _1b/3b is in the range of 2 to 5, wherein the number of the second monomer units i _2b in the polyether chain x _2b is in the range of 8 to 10.

Basically, with regard to the production or producibility of the polyetheramines, a vulcanizable rubber mixture according to the invention is also preferred, wherein the one or more polyetheramines can be produced by polymerizing an alkylene oxide with subsequent amination, wherein the alkylene oxide is preferably selected from the group consisting of butylene oxide, ethylene oxide, propylene oxide and mixtures of these compounds, preferably propylene oxide. Additionally or alternatively, a vulcanizable rubber mixture according to the invention is also particularly preferred, wherein the one or more polyetheramines are saturated compounds.

Comparatively short-chain compounds are preferably used as polyetheramines. Particularly preferred is a vulcanizable rubber mixture according to the invention, wherein the one or more polyetheramines have a weight-average molecular mass in the range from 100 to 800 g/mol, preferably in the range from 130 to 650 g/mol, particularly preferably in the range from 190 to 400 g/mol.

To further optimize the properties of the vulcanizable rubber mixture according to the invention or of the vulcanizates that can be produced therefrom, various polyetheramines can be combined, with the inventors considering combinations of preferred polyetheramines to be particularly advantageous, as can be achieved, for example, by combining the commercial products Jeffamine D-230 and ED-600. Accordingly, a vulcanizable rubber mixture according to the invention is preferred, with the vulcanizable rubber mixture comprising two or more different polyetheramines.

Irrespective of the precise chemical nature of the polyetheramines, the inventors have succeeded in identifying particularly advantageous mass proportions of these components with which the objects described above can be achieved particularly well. A vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises the one or more polyetheramines in a combined mass proportion in the range from 0.2 to 8 phr, preferably in the range from 0.4 to 6 phr.

The vulcanizable rubber mixture according to the invention further comprises one or more rubber regenerates.

It is known from the state of the art that rubber materials from old conveyor belts or old tires can be processed to be used as an additive in vulcanizable rubber compounds, which can then be shaped during tire production and vulcanized to form the desired rubber products.

These so-called rubber regenerates can in principle be produced in various ways. In particular, processed materials are known from the state of the art which are still rubber materials in the narrower sense, i.e. cross-linked rubber, but whose plasticity is adjusted to the plasticity of unvulcanized rubber by means of suitable treatment processes, in particular using thermal-chemical stress and chemicals. On the other hand, there are also rubber regenerates in which at least partial devulcanization, i.e. the breaking up of chemical bonds in the rubber material, occurs and in which the depolymerization of the previously cross-linked rubber material contributes to an increase in plasticity. More detailed background information on the various technologies and the general technological background can be found, for example, in the US20030125401 A1 , the EP 2601249 A1 , the EN 102020207121 A1 and the EP 3 173 162 A1 disclosed.

Various technologies and processes are used to produce rubber regenerates from rubber materials, such as steam regeneration, mechanical regeneration, thermal regeneration, sound wave-based regeneration, radiation-based regeneration, chemical regeneration and combinations of these methods. The person skilled in the art will understand that this is is a vulcanizable rubber mixture according to the invention, wherein the one or more rubber regenerates are produced by devulcanization of a rubber material mixture. The devulcanization of the rubber material mixture to produce the rubber regenerates can be carried out, for example, using extruder-based methods known from the prior art, as described, for example, in EN 102020207121 A1 , the EP3173162A1 or the US20030125401 A1 are disclosed.

Since these processes for the production of rubber regenerates are applied to structurally highly complex, disordered and inherently structurally indescribable starting materials and induce very different physico-chemical changes in these depending on the processes and process parameters used, the various rubber regenerates exhibit different properties depending on the rubber materials originally used and the method used for devulcanization.

In this respect, it can be seen as a great advantage of the vulcanizable rubber mixtures according to the invention that the advantageous effects of the combination of polyetheramines with rubber regenerates are achieved consistently for all of the types of rubber regenerates investigated, so that the person skilled in the art has great flexibility in selecting the rubber regenerate and in adapting this to the materials and devices available to him as well as the other desired material properties of the vulcanizable rubber mixtures.

Preference is given to a vulcanizable rubber mixture according to the invention, wherein the one or more rubber regenerates are produced by chemical-mechanical devulcanization of a rubber material mixture. This chemical-mechanical devulcanization of a rubber material mixture can be carried out, for example, in the manner described in the EN 10 2012 108 096 A1 is disclosed. A vulcanizable rubber mixture according to the invention is preferred, wherein the one or more rubber regenerates are produced by reacting a rubber material mixture, which consists to a mass fraction of at least 50% of shredded treads from truck radial tires and/or bus radial tires, with at least one regenerating agent which is selected from the group consisting of dithiophosphoryl polysulfides and silanes with a polysulfane group, in an internal mixer.

Alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the one or more rubber regenerates are produced by mechanical-thermal devulcanization of a rubber material mixture, preferably in an extruder.

With regard to the rubber materials used, preference is given to a vulcanizable rubber mixture according to the invention, the rubber material mixture consisting of rubber materials from vehicle tires, preferably worn vehicle tires, from vehicles, preferably from commercial vehicles, in particular trucks and buses, preferably from rubber materials from all rubber-containing parts of the vehicle tires with the exception of any inner tire layer that may be present, provided that this comprises butyl or halobutyl rubber, the rubber material mixture consisting in particular of rubber materials from diagonal tires. With regard to the rubber materials used, preference is additionally or alternatively given to a vulcanizable rubber mixture according to the invention, the rubber material mixture consisting of 50% or more, preferably 75% or more, particularly preferably essentially completely, of rubber materials from treads of vehicle tires, preferably worn vehicle tires, from vehicles, preferably from commercial vehicles, in particular trucks and buses. Additionally or alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the one or more rubber regenerates have an average particle size in the range from 75 µm to 5 mm, preferably in the range from 100 µm to 2 mm and particularly preferably in the range from 115 µm to 1000 µm.

With regard to the mass fractions of regenerated rubber, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises the one or more regenerated rubbers in a combined mass fraction in the range from 1 to 60 phr, preferably in the range from 2 to 50 phr, particularly preferably in the range from 3 to 30 phr, very particularly preferably in the range from 4 to 25 phr.

In addition to the diene rubbers, the fillers, the polyetheramines and the rubber regenerates, other typical components can be used in the vulcanizable rubber mixtures according to the invention, which serve, for example, to influence the physical-chemical properties, e.g. the processing and vulcanization properties, of the vulcanizable rubber mixtures or to optimize the mechanical properties of the vulcanizates that can be produced therefrom.

In this respect, preference is firstly given to a vulcanizable rubber mixture according to the invention, wherein the vulcanizable rubber mixture comprises one or more further additives, wherein the further additives are preferably selected from the group consisting of reinforcing resins, coupling agents and plasticizers, wherein the vulcanizable rubber mixture preferably comprises the further additives in a combined mass fraction in the range from 10 to 100 phr, preferably in the range from 20 to 80 phr, particularly preferably in the range from 30 to 60 phr.

An example of this is a vulcanizable rubber mixture according to the invention, wherein the reinforcing resins are selected from the group consisting of resorcinol-formaldehyde resins, in particular resorcinol-hexamethoxymethylmelamine resins (HMMM) or resorcinol-hexamethylenetetramine resins (HEXA), and modified phenolic resins. The person skilled in the art of rubber processing is easily able to distinguish resins from diene rubbers, which in practice is done in particular via the average molecular weight. An example in this regard is a vulcanizable rubber mixture according to the invention, wherein the one or more further resins have a weight-average molecular mass Mw, measured by GPC, in the range from 200 to 50,000 g/mol, preferably in the range from 400 to 40,000 g/mol, particularly preferably in the range from 600 to 30,000 g/mol, very particularly preferably in the range from 800 to 20,000 g/mol.

Also exemplary is a vulcanizable rubber mixture according to the invention, wherein the coupling agents are selected from the group consisting of 3-mercaptopropyltriethoxysilane, 3-thiocyanatopropyltrimethoxysilane and 3,3'-bis(triethoxysilylpropyl)polysulfides having 2 to 8 sulfur atoms, wherein the vulcanizable rubber mixture preferably comprises the coupling agents in a combined mass fraction in the range from 0.2 to 30 phf, preferably in the range from 1 to 15 phf.

Another example is a vulcanizable rubber mixture according to the invention, wherein the plasticizers are selected from the group consisting of mineral oils, synthetic plasticizers, fatty acids, fatty acid derivatives, plasticizer resins, factitious oils, glycerides, terpenes, biomass-to-liquid oils (BTL oils) and rubber-to-liquid oils (RTL oils), wherein the vulcanizable rubber mixture preferably comprises the plasticizers in a combined mass fraction in the range from 1 to 100 phr, preferably in the range from 10 to 80 phr, particularly preferably in the range from 20 to 60 phr.

Additionally or alternatively, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises one or more further additives, wherein the further additives are preferably selected from the group consisting of methylene donors, ageing inhibitors, for example N-phenyl-N'-(1,3-dimethylbutyl)-p-phenylenediamine (6PPD), N,N'-diphenyl-p-phenylenediamine (DPPD), N,N'-ditolyl-p-phenylenediamine (DTPD), N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD), 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ), activators, for example zinc oxide and fatty acids, waxes, mastication aids, for example 2,2'-dibenzamidodiphenyl disulfide (DBD) and processing aids. Preference is given to a vulcanizable rubber mixture according to the invention, wherein the vulcanizable rubber mixture comprises the further additives in a combined mass fraction in the range from 0.1 to 20 phr, preferably in the range from 0.5 to 15 phr, particularly preferably in the range from 1 to 10 phr.

With regard to the vulcanization behavior, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises 0.5 to 8.0 phr, preferably 0.8 to 6 phr, particularly preferably 1 to 4 phr, of sulfur. In this respect, additionally or alternatively, a vulcanizable rubber mixture according to the invention is also preferred, wherein the vulcanizable rubber mixture comprises further vulcanization components, wherein the further vulcanization components are selected from the group consisting of crosslinkers, vulcanization retarders and vulcanization accelerators, for example thiazole accelerators, mercapto accelerators, sulfenamide accelerators, thiocarbamate accelerators, thiuram accelerators, thiophosphate accelerators, thiourea accelerators, xanthate accelerators or guanidine accelerators.

It is particularly preferred to dispense with guanidine accelerators, in particular diphenylguanidine. Accordingly, a vulcanizable rubber mixture according to the invention is preferred, wherein the vulcanizable rubber mixture comprises 2 phr or less, preferably 1 phr or less, particularly preferably 0.5 phr or less, very particularly preferably essentially 0 phr, of guanidine accelerators, in particular diphenylguanidine.

1. x) Vulkanisieren der erfindungsgemäßen vulkanisierbaren Kautschukmischung, bevorzugt als Teil eines Kautschukrohlings, besonders bevorzugt eines unvulkanisierten Fahrzeugreifenrohlings, zum Erhalt eines Vulkanisates, bevorzugt als Teil eines Kautschukprodukts, bevorzugt eines Fahrzeugluftreifens.

Vulcanizates or rubber products can be produced in the usual way from the vulcanizable rubber mixtures according to the invention. The corresponding process for producing a Vulcanizate or a rubber product comprises, in addition to the production of the vulcanizable rubber mixture according to the invention, additionally, for example, the step:

1. x) Vulcanizing the vulcanizable rubber mixture according to the invention, preferably as part of a rubber blank, particularly preferably an unvulcanized vehicle tire blank, to obtain a vulcanizate, preferably as part of a rubber product, preferably a pneumatic vehicle tire.

The vulcanizable rubber mixture according to the invention is vulcanized, for example, according to the process customary in the tire industry, for example by sulfur-based crosslinking.

The invention accordingly also relates to a vulcanizate which can be produced or is produced by vulcanization of a vulcanizable rubber mixture according to the invention. In this respect, a vulcanizate according to the invention is preferred, wherein the vulcanizate can be produced by vulcanization at a temperature in the range from 130 to 200 °C, preferably in the range from 150 to 180 °C.

The invention accordingly also relates to a rubber product comprising the vulcanizate according to the invention. An example is a rubber product according to the invention, wherein the rubber product is selected from the group consisting of shoe soles, belts, hoses, conveyor belts and straps. However, for essentially all cases, preference is given to a rubber product according to the invention, wherein the rubber product is a vehicle tire, preferably a pneumatic vehicle tire, wherein the pneumatic vehicle tire preferably comprises the vulcanizate according to the invention in the tread.

Finally, the use of a vulcanizable rubber mixture according to the invention and/or a vulcanizate according to the invention in the production of rubber products, in particular vehicle tires, is also disclosed.

Hereinafter, the invention and preferred embodiments of the invention are further explained and described with reference to experiments.

A. Production of vulcanizable rubber compounds:

The vulcanizable rubber compounds were produced according to the process customary in the rubber industry under normal conditions in three stages in a laboratory tangential mixer, in which a base mixture is first produced in one or more mixing stages, which contains all components with the exception of the vulcanization system (sulfur and substances influencing vulcanization), from which the finished mixture is then produced by adding the vulcanization system.

The substances used are listed in Table 1. Table 1 - Substances used NO Natural rubber (NR TSR) BR Butadiene rubber (Trade name: Europrene Neocis BR 40, Versalis) SSBR Solution-polymerized styrene-butadiene copolymer, (trade name: Sprintan SLR-4601; Trinseo; Tg = -25 °C) filler Precipitated silica (Trade name: VN3, Evonik) Polyetheramines 1 Polyetheramines of formula VII; x ₁ ≈ 2.5 (Trade name: Jeffamine D-230; Huntsman) Polyetheramines 2 polyetheramines; m = 0, R ⁶ = -CH ₂ CH ₂ -; x = 2, ^R1 / ^R2 / ^R3 / ^R4 / ^R7 / ^R8 = H; (Trade name: Jeffamine EDR148; Huntsman) KR1 Reclaimed rubber; chemical-mechanical Devulcanization of crushed treads of truck and bus radial tires analogous to ER1 of EN 102012108096 A1 KR2 Reclaimed rubber; thermal-mechanical devulcanization from shredded treads of truck and bus radial tires (trade name: ECORR RNR30 B01; Rubber Resources) KR3 Reclaimed rubber; thermal-mechanical devulcanization from shredded, complete truck diagonal tires (trade name: GRP NRF 40R; GRP Limited) Silane Bis(3-triethoxysilylpropyl)disulfide (trade name: Si266; Evonik) Plasticizer Treated Distillate Aromatic Extracted; TDAE Additive 1 Anti-aging agent, 6PPD Additive 2 Ozone protection wax Additive 3 zinc oxide Additive 4 Stearic acid DPG Diphenylguanidine CBS N-Cyclohexyl-2-benzothiazolesulfenamides Sulphur sulfur

Test specimens were produced from the vulcanizable rubber mixtures by vulcanization to t ₉₅ - t ₁₀₀ (measured on a moving die rheometer according to ASTM D 5289-19/ ISO 6502) under pressure at 160 to 170 °C and the material properties typical for the rubber industry were determined on the test specimens produced in this way using the test procedures specified under point B.

B. Determination of the physico-chemical properties of the vulcanizates:

The following physico-chemical properties were determined on the vulcanizable rubber compounds or the vulcanizates produced from them using the determination methods listed in Table 2: Table 2 - Determination methods used t10 & t90 corresponding to the time t until 10 % or 90 % of crosslinking (S'max) is reached according to ASTM D5289 from 2012 determined using a “Moving Die Rheometer” at 160 °C HSTE High speed tear energy according to DIN53448:1977-05 or ASTM D 624-86 G`(100%) cured, cond. Dynamic storage modulus (G'(100%)) based on ASTM D6601 from 2012 from the second strain sweep at 1 Hz and 70 °C, whereby the test specimens were prepared in the apparatus by vulcanization under pressure at 170 °C for 10 minutes. G`(1 %) cured, cond. Dynamic storage modulus (G'(1%)) based on ASTM D6601 from 2012 from the second strain sweep at 1 Hz and 70 °C, whereby the test specimens were prepared in the apparatus by vulcanization under pressure at 170 °C for 10 minutes

C. Test series:

Nine vulcanizable rubber compounds were prepared, the composition of which is given in Table 3. Table 3 - Vulcanizable rubber compounds (all figures in phr) Components V1 V2 V3 E1 E2 V4 E3 V5 E4 NO 10 10 10 10 10 10 10 10 10 BR 18 18 18 18 18 18 18 18 18 SSBR 72 72 72 72 72 72 72 72 72 filler 95 95 95 95 95 95 95 95 95 Polyetheramine 1 - 2.18 - 2.18 - - 2.18 - 2.18 Polyetheramine 2 - - - - 1.4 - - - - KR1 - - 20 20 20 - - - - KR2 - - - - - 20 20 - - KR3 - - - - - - - 20 20 Silane 6.84 6.84 6.84 6.84 6.84 6.84 6.84 6.84 6.84 Plasticizer 35 35 35 35 35 35 35 35 35 Additive 1 2 2 2 2 2 2 2 2 2 Additive 2 2 2 2 2 2 2 2 2 2 Additive 3 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Additive 4 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 DPG 2 - 2 - - 2 - 2 - CBS 2 2 2 2 2 2 2 2 2 Sulphur 2 2 2 2 2 2 2 2 2

The mass fraction of the polyetheramines was adjusted in each case in order to introduce a constant amount of substance.

The material properties determined for the corresponding vulcanizates are summarized in Table 4. Table 4 - Material properties V1 V2 V3 E1 E2 V4 E3 V5 E4 t10 / min 3.3 2.5 2.6 2.2 0.7 2.2 2.0 2.6 1.5 t90 / min 16.9 14.8 14.0 15.3 14.8 14.3 15.0 13.4 12.9 HSTE / (MJ/m ³ ) 10.5 9.0 9.6 11.8 12.9 10.5 11.5 11.7 12.7 G'(100%) cured, cond. / kPa 805 836 781 695 619 738 658 750 691 G'(1%) cured, cond. / kPa 2025 2119 1957 1854 1665 1880 1769 2137 2074

The results summarized in Table 4 show that the polyetheramines 1 and 2 show an acceleration effect, especially for t10, and are also at least comparable to DPG for t90. It is therefore advantageously possible to achieve an acceleration effect without the use of DPG and to achieve a shorter vulcanization time.

In contrast to the comparison of V1 and V2, in the presence of the rubber regenerates in samples E1 to E4, surprisingly higher values for HSTE and thus improved tear properties are obtained compared to the respective comparison example, especially on rough roads. In addition, Higher stiffnesses were observed, which are expressed by a reduction in G'(1%) and correlate with better driving behavior.

Furthermore, the decrease in G`(100%) proves that the filler-filler interaction is reduced in inventive samples, which correlates with improved rolling resistance.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was 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 accepts no liability for any errors or omissions.

Cited patent literature

• EP 2725059 A1 [0005]
• WO 2013092526 A1 [0005]
• US 2008033082 A1 [0005]
• WO 2016030469 A1 [0005]
• US 20030125401 A1 [0056, 0057]
• EP 2601249 A1 [0056]
• DE 102020207121 A1 [0056, 0057]
• EP 3173162 A1 [0056, 0057]
• DE 102012108096 A1 [0060, 0079]

Cited non-patent literature

• DIN55672-1: 2016-03 [0030]
• ISO 9277:2014-01 [0032]
• DIN53448:1977-05 [0081]

Claims (10)

A vulcanizable rubber mixture comprising: a) one or more diene rubbers, b) one or more fillers selected from the group consisting of silicas, c) one or more polyetheramines, in a combined mass fraction in the range of 0.1 to 10 phr, wherein the polyetheramines are selected from the group consisting of polyetheramines of the formula I): R ¹ R ² N-(R ⁵ ) _m -XR ⁶ -NR ³ R ⁴ , I) where R ¹ , R ² , R ³ and R ⁴ are independently hydrogen or either branched or unbranched hydrocarbon radicals having 1 to 10 C atoms, where m is 0 or 1, where R ⁵ and R ⁶ are independently either branched or unbranched hydrocarbon chains having 1 to 10 C atoms, where X is a polyether chain of the formula II): -(CHR ⁷ⁱ -CHR ⁸ⁱ -O) _x II) - is, where x is in the range from 2 to 30, where R ⁷ⁱ and R ⁸ⁱ in each monomer unit i are each independently of one another and independently of the other monomer units of the polyether chain, hydrogen or hydrocarbon radicals having 1 or 2 C atoms, and d) one or more rubber regenerates. Vulcanizable rubber compound according to Claim 1 , wherein the vulcanizable rubber mixture comprises styrene-butadiene rubber as diene rubber, and/or wherein the vulcanizable rubber mixture comprises butadiene rubber as diene rubber, and/or wherein the vulcanizable rubber mixture comprises natural polyisoprene and/or synthetic polyisoprene as diene rubber. Vulcanizable rubber mixture according to one of the Claims 1 or 2 wherein the vulcanizable rubber composition comprises the one or more fillers in a combined mass fraction in the range of 5 to 250 phr. Vulcanizable rubber mixture according to one of the Claims 1 until 3 , where R ⁷ⁱ and R ⁸ⁱ in each monomer unit i are each independently of one another and independently of the other monomer units of the polyether chain, hydrogen or methyl groups. Vulcanizable rubber mixture according to one of the Claims 1 until 4 , wherein the polyether chain comprises one or more first monomer units i1 of the formula IV): -(CHR ⁷ⁱ -CH ₂ -O)-, IV) and/or wherein the polyether chain comprises one or more second monomer units i ₂ of the formula V): -(CH ₂ -CH ₂ -O)-, V) and/or wherein the polyether chain comprises one or more third monomer units i ₃ of the formula VI): -(CH ₂ -CHR ⁸ⁱ -O)-. VI) Vulcanizable rubber mixture according to one of the Claims 1 until 5 , wherein the one or more polyetheramines are selected from the group consisting of: - polyetheramines of the formula VII): H ₂ N-(CH(CH ₃ )-CH ₂ -O) _x1 -CH ₂ CH(CH ₃ )-NH ₂ , VII) where x ₁ is in the range from 2 to 6, and - polyetheramines of the formula VIII): H ₂ NX-CH ₂ CH(CH ₃ )-NH ₂ , VIII) where X is a polyether chain consisting of two or more monomer units selected from the group consisting of first monomer units i _1b of formula III _b ): -(CH(CH ₃ )-CH ₂ -O)-, IIIb) second monomer units i _2b of formula IV _b ): -(CH ₂ -CH ₂ -O)-, IVb) and third monomer units i _3b of the formula V _b ): -(CH ₂ -CH(CH ₃ )-O)-, Vb) wherein the combined number of the first monomer units i _1b and the third monomer units i _3b in the polyether chain x _1b/3b is in the range of 2 to 5, wherein the number of the second monomer units i _2b in the polyether chain x _2b is in the range of 8 to 10. Vulcanizable rubber mixture according to one of the Claims 1 until 6 , wherein the vulcanizable rubber mixture comprises the one or more rubber regenerates in a combined mass fraction in the range of 1 to 60 phr. Vulcanizable rubber mixture according to one of the Claims 1 until 7 , wherein the one or more rubber regenerates are produced by chemical-mechanical devulcanization of a rubber material mixture. Vulcanizate, producible or produced by vulcanization of a vulcanizable rubber mixture according to one of the Claims 1 until 8th . Rubber product, in particular pneumatic vehicle tyre, comprising a vulcanizate according to Claim 9 .