Provided is a tire puncture sealant having excellent puncture seal durability. The present disclosure relates to a puncture sealant containing at least one natural rubber latex, at least one antioxidant, at least one antifreezing agent, and at least one selected from the group consisting of protease inhibitors and phosphatase inhibitors.

This application relates to natural rubber (NR) composites, and more specifically to a method of preparing a graphene/natural rubber composite. In the method provided herein, nano-silica loaded graphene oxide (SiO.sub.2-GO) is formed by electrostatic interaction between silica and graphene oxide (GO), and then the SiO.sub.2-GO is added to natural rubber (NR) latex to obtain a SiO.sub.2-GO/NR masterbatch by aqueous phase synergistic aggregation-precipitation process. The SiO.sub.2-GO/NR masterbatch is subjected to mechanical blending and vulcanization to obtain the graphene/NR composite.

The present invention relates to an aqueous dipping composition for coating a textile reinforcing material, comprising 4% to 50% by dry weight of at least one rubber latex, 0.1% to 10% by dry weight of at least one blocked isocyanate, 0.3% to 30% by dry weight of at least one wax, 0% to 6% by dry weight of at least one epoxy group-containing compound, and 0% to 15% by dry weight of at least one polymer with carboxylic acid functional groups, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition. The present invention relates to a use of such a composition, a process for coating a textile reinforcing material with this composition, a coated textile reinforcing material and a respective elastomeric article comprising the same.

The present invention relates to an aqueous dipping composition for coating a textile reinforcing material, comprising 4% to 50% by dry weight of at least one rubber latex, 0.1% to 10% by dry weight of at least one blocked isocyanate, 0.3% to 30% by dry weight of at least one wax, 0% to 6% by dry weight of at least one epoxy group-containing compound, and 0% to 15% by dry weight of at least one polymer with carboxylic acid functional groups, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition. The present invention relates to a use of such a composition, a process for coating a textile reinforcing material with this composition, a coated textile reinforcing material and a respective elastomeric article comprising the same.

The present invention relates to an aqueous dipping composition for coating a textile reinforcing material, comprising 4% to 40% by dry weight of at least one rubber latex, with the proviso that the rubber latex is no isoprene rubber latex, 0.1% to 10% by dry weight of at least one blocked isocyanate, 1% to 20% by dry weight of at least one isoprene rubber latex, and 0% to 6% by dry weight of at least one epoxy group-containing compound, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition. The composition is essentially free of resorcinol, resorcinol precondensates, formaldehyde and formaldehyde-releasing substances. The present invention relates to a use of such a composition, a process for coating a textile reinforcing material with this composition, a coated textile reinforcing material and a respective elastomeric article comprising the same.

The present invention relates to an aqueous dipping composition for coating a textile reinforcing material, comprising 4% to 40% by dry weight of at least one rubber latex, with the proviso that the rubber latex is no isoprene rubber latex, 0.1% to 10% by dry weight of at least one blocked isocyanate, 1% to 20% by dry weight of at least one isoprene rubber latex, and 0% to 6% by dry weight of at least one epoxy group-containing compound, wherein the amounts in % by dry weight are based on the total weight of the aqueous dipping composition. The composition is essentially free of resorcinol, resorcinol precondensates, formaldehyde and formaldehyde-releasing substances. The present invention relates to a use of such a composition, a process for coating a textile reinforcing material with this composition, a coated textile reinforcing material and a respective elastomeric article comprising the same.

A processing method of natural rubber latex using creaming includes the following steps: adding a surfactant, a pH adjuster, and deionized water to natural rubber latex, adding a preservative and a creaming agent, mixing and standing a resulting mixture until phase separation occurs, and collecting an upper rubber latex phase and a lower skim latex phase, separately; diluting the upper rubber latex phase with deionized water, adding a preservative, a pH adjuster, a surfactant, and a creaming agent, mixing and standing a resulting mixture until phase separation occurs, and collecting an obtained upper rubber latex phase; and adding a preservative, a pH adjuster, a surfactant, and a creaming agent to an obtained lower skim latex phase, mixing and standing a resulting mixture until phase separation occurs, and collecting an obtained upper rubber latex phase.

A processing method of natural rubber latex using creaming includes the following steps: adding a surfactant, a pH adjuster, and deionized water to natural rubber latex, adding a preservative and a creaming agent, mixing and standing a resulting mixture until phase separation occurs, and collecting an upper rubber latex phase and a lower skim latex phase, separately; diluting the upper rubber latex phase with deionized water, adding a preservative, a pH adjuster, a surfactant, and a creaming agent, mixing and standing a resulting mixture until phase separation occurs, and collecting an obtained upper rubber latex phase; and adding a preservative, a pH adjuster, a surfactant, and a creaming agent to an obtained lower skim latex phase, mixing and standing a resulting mixture until phase separation occurs, and collecting an obtained upper rubber latex phase.

A masterbatch manufacturing method in accordance with the present disclosure comprises an operation in which pre-coagulation rubber latex comprising filler is coagulated to obtain a coagulum; an operation in which the coagulum is dewatered; and an operation in which the dewatered coagulum is plasticized as it is dried by means of an extruder; wherein, during the operation in which the dewatered coagulum is plasticized as it is dried, the coagulum comprises a peptizing agent.

A masterbatch manufacturing method in accordance with the present disclosure comprises an operation in which pre-coagulation rubber latex comprising filler is coagulated to obtain a coagulum; an operation in which the coagulum is dewatered; and an operation in which the dewatered coagulum is plasticized as it is dried by means of an extruder; wherein, during the operation in which the dewatered coagulum is plasticized as it is dried, the coagulum comprises a peptizing agent.