Tire comprising a composition essentially devoid of guanidine derivative and comprising an amino ether alcohol
View Patent ↗A tire comprises a rubber composition based on at least one diene elastomer, a reinforcing filler predominantly comprising silica, a crosslinking system, and an amino ether alcohol of formula (I): R 1 —O(—R 2 —O) n —R 3 —NH 2 (I), in which R 1 represents a linear or branched alkyl group comprising from 1 to 18 carbon atoms, R 2 and R 3 independently represent a linear or branched alkylene group comprising from 1 to 18 carbon atoms, and n represents an integer from 0 to 20, it being understood that the amino ether alcohol bears one or more hydroxyl groups on at least one carbon-based chain chosen from R 1 , R 2 and R 3 . The rubber composition is essentially devoid of guanidine derivative.
1. A tire comprising a rubber composition based on:
at least one diene elastomer,
a reinforcing filler comprising silica, where a content of silica is greater than a content of any other reinforcing filler that may be present,
a crosslinking system, and
an amino ether alcohol of formula (I):
R 1 —O(—R 2 —O) n —R 3 —NH 2 (I)
in which R 1 represents a linear or branched alkyl group comprising from 1 to 18 carbon atoms, R 2 and R 3 independently represent a linear or branched alkylene group comprising from 1 to 18 carbon atoms, and n represents an integer from 0 to 20,
wherein the amino ether alcohol of formula (I) bears one or more hydroxyl groups on at least one of R 1 , R 2 and R 3 ,
wherein the rubber composition includes less than 0.5 phr of guanidine derivative.
2. The tire according to claim 1 , wherein the rubber composition includes less than 0.45 phr of guanidine derivative.
3. The tire according to claim 2 , wherein the rubber composition includes less than 0.4 phr of guanidine derivative.
4. The tire according to claim 3 , wherein the rubber composition is devoid of guanidine derivative.
5. The tire according to claim 1 , wherein the amino ether alcohol is present in the rubber composition at a content of from 0.05 to 8 phr.
6. The tire according to claim 5 , wherein the content of amino ether alcohol is from more than 0.1 phr to 7 phr.
7. The tire according to claim 6 , wherein the content of amino ether alcohol is from 0.15 to 5 phr.
8. The tire according to claim 7 , wherein the content of amino ether alcohol is from more than 0.2 phr to 4 phr.
9. The tire according to claim 1 , wherein R 1 , R 2 and R 3 comprise from 2 to 12 carbon atoms.
10. The tire according to claim 9 , wherein R 1 , R 2 and R 3 comprise from 2 to 10 carbon atoms.
11. The tire according to claim 1 , wherein R 1 represents a linear alkyl group.
12. The tire according to claim 11 , wherein the linear alkyl group comprises 2 or 3 carbon atoms.
13. The tire according to claim 1 , wherein R 2 and R 3 independently represent a linear alkylene group.
14. The tire according to claim 13 , wherein the linear alkylene group comprises 2 or 3 carbon atoms.
15. The tire according to claim 1 , wherein n represents an integer from 0 to 10.
16. The tire according to claim 15 , wherein n represents an integer from 0 to 3.
17. The tire according to claim 1 , wherein n represents 0, 1 or 2.
18. The tire according to claim 1 , wherein the amino ether alcohol of formula (I) bears one or more hydroxyl groups on R 1 .
19. The tire according to claim 18 , wherein the amino ether alcohol of formula (I) bears one hydroxyl group on R 1 .
20. The tire according to claim 1 , wherein the silica is present in the rubber composition at a content of from 30 to 150 phr.
21. The tire according to claim 1 , wherein the reinforcing filler further comprises carbon black.
22. The tire according to claim 21 , wherein the carbon black is present in the rubber composition at a content of from 0.5 to 50 phr.
23. The tire according to claim 1 , wherein the diene elastomer is selected from the group consisting of polybutadienes, synthetic polyisoprenes, natural rubber, butadiene copolymers, isoprene copolymers, and mixtures thereof.
24. The tire according to claim 1 , wherein the diene elastomer comprises non-isoprene diene elastomer, where a content of the non-isoprene elastomer is greater than a content of any other elastomer that may be present.
25. The tire according to claim 24 , wherein the diene elastomer is composed of 100 phr of non-isoprene diene elastomer.
26. The tire according to claim 24 , wherein the non-isoprene diene elastomer is selected from the group consisting of polybutadienes, butadiene copolymers, isoprene copolymers, and mixtures thereof.
27. The tire according to claim 1 , wherein the rubber composition is additionally based on a plasticizer.
28. The tire according to claim 27 , wherein the plasticizer is selected from the group consisting of plasticizing resins, extending oils, and mixtures thereof.
29. The tire according to claim 27 , wherein the plasticizer is present in the rubber composition at a content of from 5 to 100 phr.
30. The tire according to claim 1 , wherein the rubber composition comprises less than 0.5 phr zinc.
31. The tire according to claim 30 , wherein the rubber composition comprises less than 0.3 phr zinc.
32. The tire according to claim 31 , wherein the rubber composition is devoid of zinc.
33. The tire according to claim 1 , wherein the rubber composition is additionally based on a coupling agent.
34. The tire according to claim 33 , wherein the coupling agent is a hydroxysilane polysulphide corresponding to the general formula (III):
(HO) a R (3-a) Si—R′—S X —R′—SiR (3-b) (OH) b (III)
wherein the R radicals, which are identical or different, are hydrocarbon groups;
wherein the R′ radicals, which are identical or different, are divalent connecting groups;
wherein a and b, which are identical or different, are equal to 1 or 2; and
wherein x is a number greater than or equal to 2.
35. The tire according to claim 34 , wherein the R radicals are hydrocarbon groups comprising from 1 to 15 carbon atoms.
36. The tire according to claim 34 , wherein the R′ radicals are divalent connecting groups comprising from 1 to 18 carbon atoms.
37. The tire according to claim 34 , wherein the coupling agent is a monohydroxysilane in which a and b are equal to 1.
38. The tire according to claim 34 ,
wherein the R radicals are selected from the group consisting of C 1 -C 6 alkyls, C 5 -C 8 cycloalkyls, and a phenyl radical, and
wherein the R′ radicals are selected from the group consisting of C 1 -C 18 alkylenes and C 6 -C 12 arylenes.
39. The tire according claim 34 , wherein the R radicals are selected from the group consisting of C 1 -C 6 alkyls and the R′ radicals are selected from the group consisting of C 1 -C 10 alkylenes.
40. The tire according to claim 34 , wherein the hydroxysilane is a monohydroxysilane polysulphide of formula (IV):
wherein the R radicals are C 1 -C 3 alkyls;
wherein the R′ radicals are C 1 -C 4 alkylenes; and
x is greater than or equal to 2.
41. The tire according to claim 40 , wherein the R radicals are each methyl.
42. The tire according to claim 40 , wherein the R′ radicals are selected from the group consisting of methylene, ethylene, and propylene.
43. The tire according to claim 34 , wherein the hydroxysilane is a bis(propyldimethylsilanol) polysulphide of specific formula (IVa):
44. The tire according to claim 1 , wherein the rubber composition is a composition of a tire layer selected from the group consisting of all or part of a tread, all or part of a tire belt, and combinations thereof.
45. The tire according to claim 44 , wherein the rubber composition comprises all or part of the tread.