Gelled lubricant composition for run-flat tires comprising polybutene acrylic or polyolefin gelling agent and particulate solid puncture sealing material
AssigneeDunlop Limited
InventorMichael J. Kenney
Life of this patent
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Abstract
Compositions for application to the interior surface of the tread of a pneumatic tire to facilitate relative movement between contacting portions of the interior surface when the tire is driven deflated, comprise a polybutene, an acrylic polymer or a polyolefin as a gelling agent for the polybutene, and a particulate solid puncture sealing material. Preferred gelling agents are polyethylenes, especially a mixture of high density and low density polyethylenes. Examples of suitable puncture sealing materials are rubber crumb and wood flour.
Claims14
A composition for application to the interior surface of the tread of a pneumatic tire to facilitate relative movement between contacting portions of the interior surface of the tire when the tire is driven deflated, said composition comprising a polybutene, an acrylic polymer or a polyolefin as gelling agent for the polybutene, and a particulate solid puncture sealing material, the particles of said puncture sealing material being of sizes distributed in a range extending from particles passing through a 7 mesh B.S. screen and retained on a 10 mesh B.S. screen to particles which will pass through a 150 micron aperture sieve, the volume of particulate solid material being at least 8% and no more than 66% of the total volume of said composition.
Dependencies are inferred from the claim text.