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 preparing a self-healing composition is disclosed, the method including following steps. An isocyanate solution, a dihydric alcohol solution, and a metal salt solution are provided. The dihydric alcohol has heterocyclic structures. The isocyanate solution and the dihydric alcohol solution are mixed, causing the isocyanate and the dihydric alcohol polymerize to form a polymer precursor. The polymer precursor includes a hard segment and a soft segment. The hard segment includes urethane groups, the soft segment includes heterocyclic structures. The polymer precursor and the metal salt solution are mixed, causing the heterocyclic structures and metal ions to undergo a chelation reaction to form a coordination complex, thereby forming the self-healing composition. A self-healing composition prepared by the method, and self-healing film using the self-healing composition are also disclosed.

Provided is a method for altering properties of tension programmed fibrous shape memory polymer. The method can include applying a protective coating to the tension programmed shape memory polymer, then applying a supportive coating to the tension programmed shape memory polymer to form a coated fiber. The protective coating avoids contact between the shape memory polymer and chemicals used in the supportive coating that can decompensate the shape memory polymer.

Provided is a method for altering properties of tension programmed fibrous shape memory polymer. The method can include applying a protective coating to the tension programmed shape memory polymer, then applying a supportive coating to the tension programmed shape memory polymer to form a coated fiber. The protective coating avoids contact between the shape memory polymer and chemicals used in the supportive coating that can decompensate the shape memory polymer.

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 method of preparing a self-healing composition is disclosed, the method including following steps. An isocyanate solution, a dihydric alcohol solution, and a metal salt solution are provided. The dihydric alcohol has heterocyclic structures. The isocyanate solution and the dihydric alcohol solution are mixed, causing the isocyanate and the dihydric alcohol polymerize to form a polymer precursor. The polymer precursor includes a hard segment and a soft segment. The hard segment includes urethane groups, the soft segment includes heterocyclic structures. The polymer precursor and the metal salt solution are mixed, causing the heterocyclic structures and metal ions to undergo a chelation reaction to form a coordination complex, thereby forming the self-healing composition. A self-healing composition prepared by the method, and self-healing film using the self-healing composition are also disclosed.

A mixture having a poly(alkylene carbonate) and a non-polymeric organic molecule having a molecular weight below 1,000 Da may be used as a self-healing material. The non-polymeric organic molecules having a molecular weight below 1,000 Da may also be used to impart self-healing behaviour to a mixture having a poly(alkylene carbonate).

A mixture having a poly(alkylene carbonate) and a non-polymeric organic molecule having a molecular weight below 1,000 Da may be used as a self-healing material. The non-polymeric organic molecules having a molecular weight below 1,000 Da may also be used to impart self-healing behaviour to a mixture having a poly(alkylene carbonate).

The present invention relates to a method for self-repairing an object, wherein the object (O) comprises a matrix of a material in a continuous solid form, with optically resonant particles dispersed there within, and that has been made by fusing together particles and/or particulates of the material in a non-continuous solid form with heat transferred from the optically resonant particles that has been generated thereby when optically resonating induced by their exposure to building electromagnetic radiation. The method comprises exposing a damaged region (D) of the object (O) to repairing electromagnetic radiation (R) to be absorbed by the optically resonant particles that are dispersed therein to optically resonate to generate heat to fuse together portions of the matrix in thermal contact therewith. The system is adapted to implement the method of the invention.