An environmentally friendly puncture sealing composition is provided which includes natural rubber latex, suitably high filtered natural rubber latex having a controlled particle size, and an aqueous antifreeze agent that includes water, glycerin and propylene glycol. The aqueous antifreeze agent has a viscosity profile similar to common ethylene glycol-based antifreeze agents, but is free of ethylene glycol. The puncture sealing composition avoids the environmental hazards of ethylene glycol, and is effective at temperatures of 30 C. and lower.

Sealing composition for repairing tires comprising: 15 to 80% of natural latex, 5 to 50% of synthetic latex, 10 to 60% of a glycol selected from ethylene glycol and propylene glycol and 0.05 to 5% of a mineral chosen from a phyllosilicate and silica having an average granulometric distribution in the range between 5 and 95 nm.

Process for the manufacture of an elastomer composition having a self-sealing property which is based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a solid unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler; between 0.5 and 15 phr of thiuram polysulphide, in which, during a first stage or stage (a), a masterbatch comprising at least the solid unsaturated diene elastomer and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a hot compounding temperature or up to a hot compounding temperature which is greater than the softening temperature of the hydrocarbon resin.

The present invention is directed to a plug for sealing a puncture in a tyre, whereby the plug comprises a head portion and a tail portion, the head portion comprising: a porous material that comprises open pores and capable of absorbing >0.02 grams of water per gram of porous material; and an accelerant selected from the group consisting of a salt, a polar solvent, an acid, and any combinations thereof, wherein the accelerant is retained in the pores of the porous material and is configured to react on contact with a curable sealant selected from the group consisting of anionic stabilized sealants, steric stabilized sealants and anionic colloidal dispersions thereby reducing curing time of the sealant, and wherein the porous material does not comprise the sealant.

A method for making a compartmentalized sealant strip and barrier assembly 10 has the steps of co-extruding a barrier strip 9 of non-sealant elastomeric material with a plurality of projecting linear extending walls 9c and a sealant strip 11 wherein the sealant strip 11 is formed on one side of the barrier strip 9 filling the space between the plurality of projecting walls 9c to form a plurality of linearly extending rows of sealant 11 across the transverse width of the co-extrusion to form the compartmentalized sealant strip and barrier assembly 10. The step of co-extruding may further include the step of: forming the projecting walls 9c on an inclined angle relative to a plane perpendicular to the width of the assembly 10. The step of co-extruding further has the step of forming the barrier strip 9 with lateral edges 9a and 9c that extend beyond the lateral outermost sealant strips 11 on each side of the assembly 10, the lateral edges 9a, 9b being bonding surfaces to seal the sealant strip and barrier assembly 10 into an uncured rubber layer when assembled into an unvulcanized tire 2.

The present invention provides: a cationic natural rubber latex comprising cationic natural rubber microparticles in which the surfaces of natural rubber microparticles are coated by a cationic polymer, a weight average molecular weight of the cationic polymer being from 3000 to 150000, a concentration of the cationic natural rubber being from 30 to 70% by mass, a viscosity at 20 C. being 500 mPa.Math.s or less, and surface potential of the cationic natural rubber microparticles being 3 mV or less; and a tire puncture sealant comprising the cationic natural rubber latex and an acidic resin emulsion, a mass ratio of a solid content of the cationic natural rubber latex to a solid content of the acidic resin emulsion being from 90:10 to 10:90. Such tire puncture sealant has superior puncture-sealing ability, storage stability, and workability.

A first object of the present invention is to provide a tire puncture sealing agent having excellent sealing property and injectability. A tire puncture sealing agent of a first embodiment of the present invention contains a particular amine compound, glycols, a rubber latex and/or a resin emulsion, and a surfactant. A second object of the present invention is to provide a tire puncture sealing agent having excellent retainability of generated foam and excellent sealing property even in a small liquid amount. A tire puncture sealing agent of a second embodiment of the present invention contains a particular polyether-modified silicone, glycols, a rubber latex and/or a resin emulsion, and a surfactant.

A device for inflating and sealing an inflatable object comprising an air-tight tube, at least one hermetic connector reversibly coupled to either end or both ends of said air- tight tube and a source of pressure connected to either one end, second end or said at least one hermetic connector. The airtight tube serves as both storage means and transfer means for a sealing agent. The device allows transfer of said sealant agent in a largely laminar flow, aiding solid and semi-solid materials in said sealant agent to align in the direction of said flow and pass securely throw the valve mechanism without clogging. The inflatable object may be inflated and sealed without removal of the valve mechanism of said inflatable object and may be charged with pressurized gas and sealant agent contemporaneously.

An environmentally friendly aerosol sealing composition for tire repair can simultaneously repair a punctured flat tire and inflate the flat tire to a pressure suitable for driving. The tire sealant composition includes a sealant concentrate and an aerosol propellant. The sealant concentrate is water-based and includes a glycerin antifreeze agent and a natural rubber latex that suitably has a mechanical stability of at least about 1050 seconds, and is substantially free of coagulants.

The invention relates to a resin-free sealant for temporary sealing of pneumatic vehicle tires, wherein the sealant comprises at least one rubber latex, at least one stabilizer and water. The invention further relates to a sealant vessel comprising a resin-free sealant and to a method of temporary sealing of a pneumatic vehicle tire.