US 11,865,866 B2
Tread for an aircraft tire
Jean-Luc Cabioch, Clermont-Ferrand (FR); and Michael Arnoux, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/299,475
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Dec. 2, 2019, PCT No. PCT/FR2019/052881
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2020/115412, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 1872317 (FR), filed on Dec. 4, 2018.
Prior Publication US 2022/0048329 A1, Feb. 17, 2022
Int. Cl. C08L 9/06 (2006.01); C08L 15/00 (2006.01); C08K 3/04 (2006.01); B60C 1/00 (2006.01); B60C 11/00 (2006.01); C08C 19/42 (2006.01); C08L 45/00 (2006.01)
CPC B60C 11/0058 (2013.01) [B60C 1/0016 (2013.01); C08K 3/04 (2013.01); C08L 9/06 (2013.01); C08L 15/00 (2013.01); B60C 2200/02 (2013.01); C08C 19/42 (2013.01); C08L 45/00 (2013.01)] 14 Claims
 
1. An aircraft tire comprising a tread having an axial width L, the tread comprising:
a middle portion having an axial width LC at least equal to 50% and at most equal to 80% of the axial width L of the tread and consisting of a middle rubber composition; and
two lateral portions positioned axially on either side of the middle portion, each having an axial width (LS1, LS2) at least equal to 10% and at most equal to 25% of the axial width L of the tread and each consisting of a lateral rubber composition,
wherein the middle rubber composition comprises at least one elastomeric matrix, a reinforcing filler and a crosslinking system, the elastomeric matrix comprising from 25 to 85 parts by weight per hundred parts by weight of elastomer, phr, of a tin-functionalized butadiene and styrene copolymer and from 15 to 75 phr of isoprene elastomer, a total content of isoprene elastomer and of butadiene and of tin-functionalized butadiene and styrene copolymer in the middle rubber composition being within a range extending from 45 to 100 phr,
wherein at least one lateral rubber composition is different from the middle rubber composition,
wherein the at least one lateral rubber composition comprises at least one diene elastomer, a reinforcing filler and a crosslinking system, in which the diene elastomer predominantly comprises at least one isoprene elastomer, and
wherein the at least one lateral rubber composition comprises more than 85 phr of the at least one isoprene elastomer.