Lubrication of run-flat tire system
US7846881B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 18, 2007 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Aug 17, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition for lubricating an interface between an inner surface of a tire and a safety support ring in a run-flat tire system that includes a lubricating agent selected from glycerol, polyalkylene glycol or combinations thereof and a thixotropic agent. The thixotropic agent is an organoclay comprising a mineral clay mixture treated with an alkyl quaternary ammonium salt, wherein the mineral clay mixture comprises at least one of sepiolite, palygorskite and a smectite and wherein a combined amount of palygorskite and sepiolite in the mineral clay mixture is between about 50 wt. % and about 100 wt. % with a balance of the mineral clay mixture being essentially the smectite. The lubricating agent may also be selected from a copolymer that is a mixture of alkylene oxides, preferably a mixture of ethylene oxide and propylene oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.