Lubricant composition
US4239632A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1979 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Mar 14, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Lubricating compositions and shaped articles composed thereof are described which consist essentially of about 30 to about 60% by weight of an oil of lubricating viscosity, about 20 to about 50% by weight of a high molecular weight polymer, and about 20 to about 50% by weight of a heat conductive agent capable of conducting heat away from a bearing surface where it is generated. The high molecular weight polymer may, for example, be polyethylene, having average molecular weights in the range from about 1.0.times.10.sup.5 to about 5.0.times.10.sup.6. The oil may be a mineral oil, a diester oil or preferably a synthetic hydrocarbon oil having a viscosity in the range from about 13 to about 1200 millimeters.sup.2 /sec (mm.sup.2 /s) at 38.degree. C. (100.degree. F.) The heat conductive agent may be powdered zinc oxide, aluminum powder, or equivalents thereof in this invention. The compositions are semi-rigid gels which may be formed in a mold and used as is, or which may be shaped further after molding. The gels are formed by blending the heat conductive agent and polymer and then blending that mixture with the oil and heating to a temperature above the softening temperature of the pol…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.