REINFORCED RUBBER COMPOSITION FOR A TIRE
The invention relates to a tyre comprising at least one rubber composition based on at least one diene elastomer, a reinforcing filler, a plasticizing system and a crosslinking system, characterized in that the composition comprises hexagonal boron nitride having a BET specific surface area of greater than or equal to 10 m 2 /g as reinforcing filler, at a content ranging from 30 to 350 parts per hundred parts of elastomer, phr, and a coupling agent capable of binding the boron nitride to the diene elastomer.
1 .- 16 . (canceled)
17 . A tire comprising at least one rubber composition based on at least one diene elastomer, a reinforcing filler, a plasticizing system and a crosslinking system,
wherein the composition comprises hexagonal boron nitride having a BET specific surface area of greater than or equal to 10 m 2 /g as reinforcing filler at a content ranging from 30 to 350 parts per hundred parts of elastomer, phr, and a coupling agent capable of binding the boron nitride to the at least one diene elastomer.
18 . The tire according to claim 17 , wherein the boron nitride has a specific surface area of greater than or equal to 15 m 2 /g.
19 . The tire according to claim 18 , wherein the boron nitride has a specific surface area of greater than or equal to 20 m 2 /g.
20 . The tire according to claim 17 , wherein the at least one diene elastomer is selected from the group consisting of polybutadienes, synthetic polyisoprenes, natural rubber, butadiene copolymers, isoprene copolymers and mixtures thereof.
21 . The tire according to claim 17 , wherein the at least one diene elastomer is a styrene/butadiene copolymer.
22 . The tire according to claim 17 , wherein the at least one diene elastomer represents at least 50% by weight of all the elastomers present in the composition.
23 . The tire according to claim 17 , wherein the content of boron nitride ranges from 60 to 250 phr.
24 . The tire according to claim 17 , wherein the boron nitride is the predominant reinforcing filler of the composition.
25 . The tire according to claim 24 , wherein the boron nitride is the only reinforcing filler of the composition.
26 . The tire according to claim 24 , wherein the boron nitride is used in a blend with another reinforcing filler, the another reinforcing filler being present in the composition at a content of less than or equal to 30 phr.
27 . The tire according to claim 17 , wherein a content of coupling agent represents from 0.1 to 7% by weight relative to the amount of boron nitride.
28 . The tire according to claim 27 , wherein the content of coupling agent represents from 0.2 to 5% by weight.
29 . The tire according to claim 17 , wherein a content of plasticizing system ranges from 5 to 150 phr.
30 . The tire according to claim 17 , wherein the content of plasticizing system ranges from 10 to 130 phr.
31 . The tire according to claim 30 , wherein the content of plasticizing system ranges from 20 to 100 phr.
32 . The tire according to claim 17 , wherein the plasticizing system predominantly comprises a plasticizing resin with a Tg of greater than 20° C.
33 . The tire according to claim 32 , wherein the plasticizing system solely comprises one plasticizing resin.
34 . The tire according to claim 17 , wherein the composition at least partially constitutes the tread.