VEHICLE PNEUMATIC TYRE HAVING A NOISE ABSORBER AND ADHESIVE COMPOSITION FOR FIXING AT LEAST ONE NOISE ABSORBER TO A SURFACE OF A VEHICLE PNEUMATIC TYRE

Abstract

A pneumatic vehicle tire including at least one sound absorber adhesively attached to the inner surface opposite the tread in the interior of said tire, wherein the at least one sound absorber adheres to an adhesive, and to an adhesive composition for securing at least one sound absorber to a surface of a pneumatic vehicle tire. The adhesive includes 10% to 80% by weight of at least one rubber, 11% to 80% by weight of at least one polyolefin and 2% to 20% by weight of at least one hydrocarbon resin. The adhesive has optimized flow characteristics and an optimized stickiness.

Claims

1.-12. (canceled)

13. A pneumatic vehicle tire comprising at least one sound absorber adhesively attached to an inner surface opposite a tread and in an interior of the pneumatic vehicle tire, wherein the at least one sound absorber adheres to an adhesive, and wherein the adhesive comprises the following constituents: 10% to 80% by weight of at least one rubber; 11% to 80% by weight of at least one polyolefin; and, 2% to 20% by weight of at least one hydrocarbon resin.

14. The pneumatic vehicle tire as claimed in claim 13, wherein the at least one rubber is selected from the group consisting of natural rubber (NR), synthetic polyisoprene (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), butyl rubber (IIR) and halobutyl rubber.

15. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive contains 51% to 80% by weight of at least one butyl rubber (IIR).

16. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive contains 10% to 80% by weight of at least one rubber, wherein the rubber is selected from the group consisting of natural rubber (NR), synthetic polyisoprene (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR) and halobutyl rubber.

17. The pneumatic vehicle tire as claimed in claim 16, wherein the at least one rubber is incorporated in an amount of from 30% to 60% by weight.

18. The pneumatic vehicle tire as claimed in claim 17, wherein the at least one rubber is incorporated in an amount of from 40% to 55% by weight.

19. The pneumatic vehicle tire as claimed in claim 18, wherein the at least one rubber is incorporated in an amount of from 45% to 50% by weight.

20. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive contains 1% to 35% by weight of at least one filler.

21. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive is free from vulcanization agents, metal oxides and peroxidic compounds.

22. The pneumatic vehicle tire as claimed in claim 13, wherein the at least one polyolefin is at least one polybutene.

23. The pneumatic vehicle tire as claimed in preceding claim 13, wherein the at least one sound absorber is at least one porous damping element.

24. The pneumatic vehicle tire as claimed in claim 23, wherein the porous damping element is a sound-absorbing foam ring closed or open in a circumferential direction of the pneumatic vehicle tire.

25. The pneumatic vehicle tire as claimed in claim 13, wherein the sound absorber comprises at least one polyurethane foam.

26. The pneumatic vehicle tire as claimed in claim 13, wherein the at least one hydrocarbon resin is incorporated in an amount of from 5% to 8% by weight.

27. The pneumatic vehicle tire as claimed in claim 13, wherein the at least one hydrocarbon resin is incorporated in an amount of from 5% to 6.5% by weight.

28. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive has a thickness in a radial direction of from 0.05 mm to 10 mm.

29. The pneumatic vehicle tire as claimed in claim 13, wherein the adhesive further comprises from 0.2% to 12% by weight of at least one plasticizer.

30. The pneumatic vehicle tire as claimed in claim 29, wherein at least one plasticizer is incorporated in an amount of from 2% to 6% by weight.

31. The pneumatic vehicle tire as claimed in claim 13, wherein the sound absorber comprises a melamine resin foam.

Description

[0113] The invention shall be more particularly elucidated hereinbelow with reference to a working example. An example of an inventive pneumatic vehicle tire is shown in FIG. 1.

[0114] FIG. 1 depicts a cross section through a radial passenger motor vehicle tire having a profiled tread 1, sidewalls 2, bead regions 3, bead cores 4 and also a multi-ply belt bandage 5 and a carcass insert 6. On its inner surface, the tire is covered with an inner layer 7 of an airtight rubber compound. An adhesive 8 is subsequently applied (in the finished tire) to the inner surface of the inner layer 7 opposite the tread 1.

[0115] According to a first example the adhesive 8 consists of the following substances: [0116] 27.3% by weight of butyl rubber, [0117] 55.8% by weight of polybutene having an Mn of 1300 g/mol, [0118] 5.3% by weight of aliphatic hydrocarbon resin (C.sub.5 resin), [0119] 8.4% by weight of N326 carbon black as a filler, [0120] 3.2% by weight of mineral oil plasticizer.

[0121] According to a further example the adhesive 8 contains the following substances: [0122] 48% by weight of at least one rubber selected from the group consisting of natural rubber (NR), synthetic polyisoprene (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), and halobutyl rubber, [0123] 35.1% by weight of polybutene having an Mn of 1300 g/mol, [0124] 5.3% by weight of aliphatic hydrocarbon resin (C.sub.5 resin), [0125] 8.4% by weight of N326 carbon black as a filler, [0126] 3.2% by weight of mineral oil plasticizer.

[0127] This adhesive has for example a complex viscosity at 120° C. (0.02 Hz, frequency scanning, plate-plate rheometer) of 2700 Pas (pascal seconds) and is thus particularly optimized in respect of processability, flow characteristics, stationarity. Said adhesive further comprises an optimal stickiness on account of the composition.

[0128] Adhering to the adhesive 8 as sound absorber 9 is a sound-absorbing foam ring which is pressed into place immediately after application of the adhesive 8 as described hereinbelow. With respect to its sound-absorbing properties the sound-absorbing foam ring is matched to the tire cavity frequency. The sound absorber 9 in the form of a foam ring here has for example approximately an elongated triangle cross section that is symmetrical with respect to the tire equator.

[0129] The foam of the foam ring is an open-celled foam since said foam is best suited for absorbing sound. The foam comprises polyurethane for example.

[0130] The adhesive is introduced, for example by spray application, such that it covers at least the inner surface opposite the tread 1 or merely parts thereof. The tire may be rotated to optimally distribute the adhesive on the inner surface. The adhesive is further introduced in an amount such that the thickness/film thickness of the adhesive is between 0.05 mm and 10 mm. The adhesive shall be relatively liquid at least immediately after application to achieve optimal distribution of the adhesive over the surface and shall also be sticky. The prefabricated foam ring is introduced into the interior of the tire and pressed into place at this juncture. After introduction the foam ring adheres to the elastically deformable but very largely stationary adhesive 8.

LIST OF REFERENCE NUMERALS

[0131] 1 . . . Tread [0132] 2 . . . Sidewall [0133] 3 . . . Bead region [0134] 4 . . . Bead core [0135] 5 . . . Belt bandage [0136] 6 . . . Carcass insert [0137] 7 . . . Inner layer [0138] 8 . . . Adhesive [0139] 9 . . . Sound absorber [0140] rR . . . Radial direction (arrowed direction pointing from radially inward to radially outward) [0141] aR . . . Axial direction