Lubricants for run-flat tire systems

Details Lubricants for run-flat tire systems Lubricants for run-flat tire systems

C - Chemistry, Metallurgy

10

M

C10M 105/14 (2006.01) B60C 17/00 (2006.01) B60C 17/04 (2006.01)

Patent

CA 2522301

A lubricant for a run-flat tire system includes a water soluble, or water- miscible carrier, a thickener, and a surfactant. The thickener hereof retains its rheological properties and is not subject to permanent thinning shear. The base fluid is, preferably, a water-soluble polyhydroxyl or other polyhydric compound and the thickener is preferably a clay. When admixed with a surfactant and, optionally, a lubricity agent, the lubricant exhibits long term stability and (is resistant to heat buildup.) prevents the buildup of heat in the tire assembly when the tire is in the run flat condition.

Cette invention concerne un lubrifiant pour systèmes de pneus à roulage à plat comprenant un support hydrosoluble ou miscible avec l'eau, un gent épaississant et un tensioactif. L'agent épaississant conserve ses propriétés rhéologiques et n'est pas sujet à cisaillement par amincissement continu. Le liquide de base est de préférence un polyhydroxyle hydrosoluble ou autre composé polyhydrique et l'agent épaississant de préférence de l'argile. Lorsqu'on l'ajoute à un tensioactif et éventuellement à un agent d'onctuosité, ce lubrifiant offre une stabilité durable et empêche la formation de chaleur dans l'ensemble pneu en conditions de roulage à plat.

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