Abstract:
Self-sealing tyre comprising at least one layer of sealing material having the following characteristics: (a) a value of the dynamic elastic modulus (G'), measured at a temperature of 80°C, at a frequency of 1 Hz, with a deformation of 5%, which is at least 60% lower than the value of said modulus measured at a temperature of 80°C, at a frequency of 1 Hz, with a deformation of 1%; (b) a value of the dynamic elastic modulus (G'), measured at a temperature of 80°C, at a frequency of 1 Hz, with a deformation of 5%, which is not less than 0.05 KPa, preferably in the range from 0.1 KPa to 0.4 KPa.
Abstract:
This invention relates to novel tire sealer and inflator compositions. The compositions may be aqueous or non-aqueous and comprise a petroleum residual resin sealant, an amorphous polyolefin, an organic solvent, a vapor pressure depressant, and a non-flammable propellant/inflator having an ozone depletion potential of zero. For the aqueous system, the composition further comprises an emulsifier. The compositions are useful for sealing and inflating a punctured tire in combination with a propellant/inflator.
Abstract:
The invention relates to automobile tyres or tyre assemblies or parts thereof suitable for being balanced by introduction therein of a thixrotropic balancing gel, wherein surfaces of the tyre or tyre assembly or part thereof which are intended to be in contact with the balancing gel are provided with a surface nanostructure with an average surface roughness in the range of 1-1000 nm. The surface nanostructure will enable the thixotropic balancing gel to move to the location, where it balances the tyre, significantly quicker than if the surface in question did not have the surface nanostructure.
Abstract:
A pneumatic tire in which a sealant layer has been formed based on a decomposition reaction of polyisobutylene and which has an excellent puncture-preventing function while avoiding any inconvenience aroused by the sealant layer formation. The pneumatic tire has a sealant layer in that region of the inner surface of the tire which corresponds at least to the tread. The sealant layer is made of a pressure-sensitive adhesive sealant obtained by heating a rubber composition containing 0.2 to 20 parts by weight of a peroxide per 100 parts by weight of a rubber ingredient comprising at least 50 wt.% of polyisobutylene and 0.2 to 20 parts by weight of a peroxide. A liquid ethylene/alpha-olefin copolymer, liquid polybutadiene, or liquid polyisoprene is added as a pressure-sensitive adhesive for the sealant layer in an amount of 5 to 50 parts by weight.
Abstract:
Tyre for vehicle wheels, comprising: a carcass structure having at least one carcass ply shaped in a substantially toroidal configuration, whose opposite lateral edges are associated with respective bead wires; a belt structure comprising at least one belt strip applied in a circumferentially outer position with respect to said carcass structure; a tread circumferentially superimposed on said belt structure; a pair of sidewalls applied laterally on opposite sides with respect to said carcass structure; at least one layer of sealing composition placed in a radially inner position with respect to said tread; wherein said sealing composition comprises: (a) at least one high molecular weight amorphous polymer; (b) at least one low molecular weight amorphous polymer; (c) at least one reinforcing filler; is substantially non-crosslinked and has a flowability value, measured at a temperature of loo°C and at a pressure of 30 bar, not higher than 30 cm3/s.
Abstract:
A pneumatic tire, comprising adhesive sealant applied onto the inner surface thereof, wherein an air barrier membrane is disposed on the inner surface of the tire at least at a tread part, a space part is formed between the air barrier membrane and the inner surface of the tire, and the adhesive sealant is stacked on the space part side surface of the air barrier membrane, whereby an increase in weight can be minimized and a workability in handling the tire can be increased.
Abstract:
A pneumatic tire having a puncture−preventive sealant layer that suppresses the generation of decomposition gas and is high in viscosity; and a method of producing the same. This pneumatic tire has a sealant layer applied to the inner surface thereof, which sealant layer is made of a rubber composition having, as a cobalt component, 0.07−0.5 parts by weight of cobalt salt for 100 parts by weight of rubber containing not less than 80 parts by weight of natural rubber or isoprene rubber.
Abstract:
A tire sealant and inflator composition for the repair of puncture wounds in pneumatic tires and the like. The composition utilizes a sealing component consisting of an acrylic resin dissolved in a suitable solvent and a hydrochlorofluorocarbon and/or hydrofluorocarbon propellant component to deliver the sealing component from an aerosol container into the tire to a driveable state.