A self-healing pneumatic tire, which uses the sealant stored in the tire to fix a leak, is disclosed.

A self-healing pneumatic tire, which uses the sealant stored in the tire to fix a leak, is disclosed.

The present invention is directed to a pneumatic tire comprising a tread portion having (i) circumferential grooves and (ii) circumferential ribs or rows of tread blocks; an inner surface defining a tire cavity; and a sealant material layer at least partially covering the inner surface radially below the tread portion within the tire cavity. The sealant material layer comprises elevations of sealant material, wherein an elevation of sealant material is provided radially below each of at least two of the circumferential grooves, and wherein the sealant material layer has a larger radial thickness in said elevations than in areas radially below the circumferential ribs or rows of tread blocks.

A tire with in-situ generated two or more intrinsic puncture sealant layers based on ionic butyl with two or more different viscosities comprising a supporting tire carcass having one or more layers of ply, an outer circumferential tread, and a radially inner layer, a pair of beads, sidewalls extending radially inward from the axial outer edges of a tread portion to join the respective beads, a sealant comprising an outer layer of sealant and an inner layer of sealant, disposed radially inwardly from the radially inner layer of the tire carcass, wherein the outer layer of sealant and the inner layer of sealant have different viscosities, wherein the sealant provides self-sealing properties to the tire, and wherein the inner layer of sealant is cross-linked to the outer layer of sealant with no barrier separating the inner and outer layers of sealant.

A method of performing a diagnostic test on a vehicle having at least one tire includes providing the vehicle with at least one sensor configured to detect a vehicle operating characteristic, a receiver configured to receive AM signals, a notification system, and a controller in electronic communication with the at least one sensor, the receiver, and the notification system, receiving sensor data from the at least one sensor and AM signal data from the receiver, analyzing the sensor data and the AM signal data, determining whether a first condition is satisfied, and in response to the first condition being satisfied, generating a first control signal to control the notification system to generate a notification.

A self-sealing composition is based on at least: one thermoplastic styrene elastomer; one polyolefin having a number-average molar mass Mn ranging from more than 550 000 to 5 000 000 g/mol; and at least 140 phr of an extender oil.

Various embodiments of the present disclosure relate to a coagulatable mixture. The coagulatable mixture includes a solvent component; an antifreeze component; a latex component; and a solid filler component.

The tire comprises a tread (14) comprising a deeply cut rib (68, 70) and a slightly cut rib (62, 64, 66), and a layer of a self-sealing product (80) comprising: a portion (90″, 92″) extending in line with the deeply cut rib (68, 70) and having an average thickness Ec > 0 of self-sealing product, and a portion (100′, 102′, 104′) extending in line with the slightly cut rib (62, 64, 66) and having an average thickness Eb ≥ 0 of self-sealing product such that Eb <Ec.

The tire comprises a tread (14) comprising a deeply cut rib (68, 70) and a slightly cut rib (62, 64, 66), and a layer of a self-sealing product (80) comprising: a portion (90″, 92″) extending in line with the deeply cut rib (68, 70) and having an average thickness Ec > 0 of self-sealing product, and a portion (100′, 102′, 104′) extending in line with the slightly cut rib (62, 64, 66) and having an average thickness Eb ≥ 0 of self-sealing product such that Eb <Ec.

A self-healing pneumatic tire, which uses the sealant stored in the tire to fix a leak, is disclosed.