Lubricating bases for multigrade oils
US4036771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Sep 5, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2209/111
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There are disclosed lubricating compositions consisting of homogeneous mixtures of: PA0 a. from 50 to 99% by weight of at least one mineral or synthetic hydrocarbon oil of lubricating viscosity, PA0 B. from 1 to 50% by weight of at least one complex ester composition formed as between at least one polycarboxylic acid selected from dimeric and trimeric unsaturated fatty acids, optionally hydrogenated, at least one dihydroxyl compound selected from polyalkylene glycols and diols, and at least one monofunctional compound comprising at least one monocarboxylic acid or at least one monohydroxyl compound selected from monohydric alcohols or monohydric phenols and oxyalkylenated monohydric alcohols or monohydric phenols, with the condition that one at least of the mono- or dihydroxyl compounds comprises a compound with oxyalkylene groups, and PA0 C. from 0 to 40% by weight of at least one light ester. These compositions are usable as bases for multigrade oils with the addition of low amounts of viscosity index improvers, or without any addition of such additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.